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Groups > linux.kernel > #1284031 > unrolled thread
| Started by | Alexandre Belloni <alexandre.belloni@free-electrons.com> |
|---|---|
| First post | 2015-12-04 18:10 +0100 |
| Last post | 2015-12-10 18:10 +0100 |
| Articles | 14 — 2 participants |
Back to article view | Back to linux.kernel
[PATCH v3 00/13] ARM: at91: PMC driver rework Alexandre Belloni <alexandre.belloni@free-electrons.com> - 2015-12-04 18:10 +0100
[PATCH v3 10/13] ARM: at91: pm: move idle functions to pm.c Alexandre Belloni <alexandre.belloni@free-electrons.com> - 2015-12-04 18:10 +0100
[PATCH v3 01/13] clk: at91: make use of syscon to share PMC registers in several drivers Alexandre Belloni <alexandre.belloni@free-electrons.com> - 2015-12-04 18:10 +0100
[PATCH v3 12/13] usb: gadget: atmel: access the PMC using regmap Alexandre Belloni <alexandre.belloni@free-electrons.com> - 2015-12-04 18:10 +0100
[PATCH v3 09/13] ARM: at91: pm: find and remap the pmc Alexandre Belloni <alexandre.belloni@free-electrons.com> - 2015-12-04 18:10 +0100
[PATCH v3 07/13] clk: at91: pmc: move pmc structures to C file Alexandre Belloni <alexandre.belloni@free-electrons.com> - 2015-12-04 18:10 +0100
[PATCH v3 08/13] ARM: at91: pm: simply call at91_pm_init Alexandre Belloni <alexandre.belloni@free-electrons.com> - 2015-12-04 18:10 +0100
[PATCH v3 13/13] clk: at91: pmc: drop at91_pmc_base Alexandre Belloni <alexandre.belloni@free-electrons.com> - 2015-12-04 18:10 +0100
[PATCH v3 11/13] ARM: at91: remove useless includes and function prototypes Alexandre Belloni <alexandre.belloni@free-electrons.com> - 2015-12-04 18:10 +0100
[PATCH v3 04/13] clk: at91: make IRQ optional and register them later Alexandre Belloni <alexandre.belloni@free-electrons.com> - 2015-12-04 18:20 +0100
[PATCH v3 03/13] clk: at91: clk-main: factorize irq handling Alexandre Belloni <alexandre.belloni@free-electrons.com> - 2015-12-04 18:20 +0100
[PATCH v3 06/13] clk: at91: pmc: merge at91_pmc_init in atmel_pmc_probe Alexandre Belloni <alexandre.belloni@free-electrons.com> - 2015-12-04 18:20 +0100
[PATCH v3 05/13] clk: at91: only disable available IRQs Alexandre Belloni <alexandre.belloni@free-electrons.com> - 2015-12-04 18:20 +0100
Re: [PATCH v3 00/13] ARM: at91: PMC driver rework Boris Brezillon <boris.brezillon@free-electrons.com> - 2015-12-10 18:10 +0100
| From | Alexandre Belloni <alexandre.belloni@free-electrons.com> |
|---|---|
| Date | 2015-12-04 18:10 +0100 |
| Subject | [PATCH v3 00/13] ARM: at91: PMC driver rework |
| Message-ID | <qC21Q-5zk-21@gated-at.bofh.it> |
Hi,
This patch set is a cleanup that properly separate drivers needing to access the
PMC (PM and USB) from the clock driver by exposing the PMC as a syscon.
This also allows to implement a fix for preempt-rt. Currently, at91 platform are
crashing when using preempt-rt because the irq handler are transformed in
threaded irq handler but at the time the pmc registers its clocks, it is not
possible to creat threads, leading to a NULL pointer dereference in the kernel.
The new infrastructure uses polling until it is late enough to register threaded
irqs.
Note that there is an ugly global spinlock for the peripheral and generated
clocks. More infrastructure is needed in syscon to get rid of that one. We will
be working on that.
Changes in v3:
- rebased on v4.4-rc1 and so included the sama5d2 and the generated clocks
- fixed comments from Wenyou
Alexandre Belloni (10):
clk: at91: clk-main: factorize irq handling
clk: at91: make IRQ optional and register them later
clk: at91: pmc: merge at91_pmc_init in atmel_pmc_probe
clk: at91: pmc: move pmc structures to C file
ARM: at91: pm: simply call at91_pm_init
ARM: at91: pm: find and remap the pmc
ARM: at91: pm: move idle functions to pm.c
ARM: at91: remove useless includes and function prototypes
usb: gadget: atmel: access the PMC using regmap
clk: at91: pmc: drop at91_pmc_base
Boris Brezillon (3):
clk: at91: make use of syscon to share PMC registers in several
drivers
clk: at91: make use of syscon/regmap internally
clk: at91: only disable available IRQs
arch/arm/mach-at91/Kconfig | 1 +
arch/arm/mach-at91/at91rm9200.c | 2 -
arch/arm/mach-at91/at91sam9.c | 2 -
arch/arm/mach-at91/generic.h | 13 +-
arch/arm/mach-at91/pm.c | 70 +++++-
arch/arm/mach-at91/sama5.c | 2 +-
drivers/clk/at91/clk-generated.c | 95 ++++---
drivers/clk/at91/clk-h32mx.c | 32 ++-
drivers/clk/at91/clk-main.c | 430 ++++++++++++++++++--------------
drivers/clk/at91/clk-master.c | 134 ++++++----
drivers/clk/at91/clk-peripheral.c | 135 +++++-----
drivers/clk/at91/clk-pll.c | 190 +++++++++-----
drivers/clk/at91/clk-plldiv.c | 42 ++--
drivers/clk/at91/clk-programmable.c | 92 ++++---
drivers/clk/at91/clk-slow.c | 27 +-
drivers/clk/at91/clk-smd.c | 54 ++--
drivers/clk/at91/clk-system.c | 129 +++++++---
drivers/clk/at91/clk-usb.c | 121 +++++----
drivers/clk/at91/clk-utmi.c | 116 ++++++---
drivers/clk/at91/pmc.c | 314 +++++------------------
drivers/clk/at91/pmc.h | 96 +------
drivers/usb/gadget/udc/atmel_usba_udc.c | 20 +-
drivers/usb/gadget/udc/atmel_usba_udc.h | 2 +
include/linux/clk/at91_pmc.h | 12 -
24 files changed, 1111 insertions(+), 1020 deletions(-)
--
2.5.0
--
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| From | Alexandre Belloni <alexandre.belloni@free-electrons.com> |
|---|---|
| Date | 2015-12-04 18:10 +0100 |
| Subject | [PATCH v3 10/13] ARM: at91: pm: move idle functions to pm.c |
| Message-ID | <qC21Q-5zk-25@gated-at.bofh.it> |
| In reply to | #1284031 |
Avoid using code from clk/at91 for PM.
This also has the bonus effect of setting arm_pm_idle for sama5 platforms.
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
---
arch/arm/mach-at91/at91rm9200.c | 2 --
arch/arm/mach-at91/at91sam9.c | 2 --
arch/arm/mach-at91/generic.h | 6 ++----
arch/arm/mach-at91/pm.c | 37 ++++++++++++++++++++++++++++++++-----
arch/arm/mach-at91/sama5.c | 2 +-
drivers/clk/at91/pmc.c | 15 ---------------
6 files changed, 35 insertions(+), 29 deletions(-)
diff --git a/arch/arm/mach-at91/at91rm9200.c b/arch/arm/mach-at91/at91rm9200.c
index c1a7c6cc00e1..63b4fa25b48a 100644
--- a/arch/arm/mach-at91/at91rm9200.c
+++ b/arch/arm/mach-at91/at91rm9200.c
@@ -12,7 +12,6 @@
#include <linux/of_platform.h>
#include <asm/mach/arch.h>
-#include <asm/system_misc.h>
#include "generic.h"
#include "soc.h"
@@ -33,7 +32,6 @@ static void __init at91rm9200_dt_device_init(void)
of_platform_populate(NULL, of_default_bus_match_table, NULL, soc_dev);
- arm_pm_idle = at91rm9200_idle;
at91rm9200_pm_init();
}
diff --git a/arch/arm/mach-at91/at91sam9.c b/arch/arm/mach-at91/at91sam9.c
index 7eb64f763034..cada2a6412b3 100644
--- a/arch/arm/mach-at91/at91sam9.c
+++ b/arch/arm/mach-at91/at91sam9.c
@@ -62,8 +62,6 @@ static void __init at91sam9_common_init(void)
soc_dev = soc_device_to_device(soc);
of_platform_populate(NULL, of_default_bus_match_table, NULL, soc_dev);
-
- arm_pm_idle = at91sam9_idle;
}
static void __init at91sam9_dt_device_init(void)
diff --git a/arch/arm/mach-at91/generic.h b/arch/arm/mach-at91/generic.h
index b0fa7dc7286d..d224e195706a 100644
--- a/arch/arm/mach-at91/generic.h
+++ b/arch/arm/mach-at91/generic.h
@@ -18,20 +18,18 @@
extern void __init at91_map_io(void);
extern void __init at91_alt_map_io(void);
-/* idle */
-extern void at91rm9200_idle(void);
-extern void at91sam9_idle(void);
-
#ifdef CONFIG_PM
extern void __init at91rm9200_pm_init(void);
extern void __init at91sam9260_pm_init(void);
extern void __init at91sam9g45_pm_init(void);
extern void __init at91sam9x5_pm_init(void);
+extern void __init sama5_pm_init(void);
#else
static inline void __init at91rm9200_pm_init(void) { }
static inline void __init at91sam9260_pm_init(void) { }
static inline void __init at91sam9g45_pm_init(void) { }
static inline void __init at91sam9x5_pm_init(void) { }
+static inline void __init sama5_pm_init(void) { }
#endif
#endif /* _AT91_GENERIC_H */
diff --git a/arch/arm/mach-at91/pm.c b/arch/arm/mach-at91/pm.c
index 38e93174031d..e7ba340fd8d0 100644
--- a/arch/arm/mach-at91/pm.c
+++ b/arch/arm/mach-at91/pm.c
@@ -31,6 +31,7 @@
#include <asm/mach/irq.h>
#include <asm/fncpy.h>
#include <asm/cacheflush.h>
+#include <asm/system_misc.h>
#include "generic.h"
#include "pm.h"
@@ -349,6 +350,21 @@ static __init void at91_dt_ramc(void)
at91_pm_set_standby(standby);
}
+void at91rm9200_idle(void)
+{
+ /*
+ * Disable the processor clock. The processor will be automatically
+ * re-enabled by an interrupt or by a reset.
+ */
+ writel(AT91_PMC_PCK, pmc + AT91_PMC_SCDR);
+}
+
+void at91sam9_idle(void)
+{
+ writel(AT91_PMC_PCK, pmc + AT91_PMC_SCDR);
+ cpu_do_idle();
+}
+
static void __init at91_pm_sram_init(void)
{
struct gen_pool *sram_pool;
@@ -406,7 +422,7 @@ static const struct of_device_id atmel_pmc_ids[] = {
{ /* sentinel */ },
};
-static void __init at91_pm_init(void)
+static void __init at91_pm_init(void (*pm_idle)(void))
{
struct device_node *pmc_np;
@@ -420,6 +436,9 @@ static void __init at91_pm_init(void)
return;
}
+ if (pm_idle)
+ arm_pm_idle = pm_idle;
+
at91_pm_sram_init();
if (at91_suspend_sram_fn)
@@ -440,7 +459,7 @@ void __init at91rm9200_pm_init(void)
at91_pm_data.uhp_udp_mask = AT91RM9200_PMC_UHP | AT91RM9200_PMC_UDP;
at91_pm_data.memctrl = AT91_MEMCTRL_MC;
- at91_pm_init();
+ at91_pm_init(at91rm9200_idle);
}
void __init at91sam9260_pm_init(void)
@@ -448,7 +467,7 @@ void __init at91sam9260_pm_init(void)
at91_dt_ramc();
at91_pm_data.memctrl = AT91_MEMCTRL_SDRAMC;
at91_pm_data.uhp_udp_mask = AT91SAM926x_PMC_UHP | AT91SAM926x_PMC_UDP;
- at91_pm_init();
+ at91_pm_init(at91sam9_idle);
}
void __init at91sam9g45_pm_init(void)
@@ -456,7 +475,7 @@ void __init at91sam9g45_pm_init(void)
at91_dt_ramc();
at91_pm_data.uhp_udp_mask = AT91SAM926x_PMC_UHP;
at91_pm_data.memctrl = AT91_MEMCTRL_DDRSDR;
- at91_pm_init();
+ at91_pm_init(at91sam9_idle);
}
void __init at91sam9x5_pm_init(void)
@@ -464,5 +483,13 @@ void __init at91sam9x5_pm_init(void)
at91_dt_ramc();
at91_pm_data.uhp_udp_mask = AT91SAM926x_PMC_UHP | AT91SAM926x_PMC_UDP;
at91_pm_data.memctrl = AT91_MEMCTRL_DDRSDR;
- at91_pm_init();
+ at91_pm_init(at91sam9_idle);
+}
+
+void __init sama5_pm_init(void)
+{
+ at91_dt_ramc();
+ at91_pm_data.uhp_udp_mask = AT91SAM926x_PMC_UHP | AT91SAM926x_PMC_UDP;
+ at91_pm_data.memctrl = AT91_MEMCTRL_DDRSDR;
+ at91_pm_init(NULL);
}
diff --git a/arch/arm/mach-at91/sama5.c b/arch/arm/mach-at91/sama5.c
index d9cf6799aec0..df8fdf1cf66d 100644
--- a/arch/arm/mach-at91/sama5.c
+++ b/arch/arm/mach-at91/sama5.c
@@ -51,7 +51,7 @@ static void __init sama5_dt_device_init(void)
soc_dev = soc_device_to_device(soc);
of_platform_populate(NULL, of_default_bus_match_table, NULL, soc_dev);
- at91sam9x5_pm_init();
+ sama5_pm_init();
}
static const char *const sama5_dt_board_compat[] __initconst = {
diff --git a/drivers/clk/at91/pmc.c b/drivers/clk/at91/pmc.c
index cfbfea6d641f..c7bd8c17acad 100644
--- a/drivers/clk/at91/pmc.c
+++ b/drivers/clk/at91/pmc.c
@@ -44,21 +44,6 @@ struct at91_pmc {
void __iomem *at91_pmc_base;
EXPORT_SYMBOL_GPL(at91_pmc_base);
-void at91rm9200_idle(void)
-{
- /*
- * Disable the processor clock. The processor will be automatically
- * re-enabled by an interrupt or by a reset.
- */
- at91_pmc_write(AT91_PMC_SCDR, AT91_PMC_PCK);
-}
-
-void at91sam9_idle(void)
-{
- at91_pmc_write(AT91_PMC_SCDR, AT91_PMC_PCK);
- cpu_do_idle();
-}
-
int of_at91_get_clk_range(struct device_node *np, const char *propname,
struct clk_range *range)
{
--
2.5.0
--
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| From | Alexandre Belloni <alexandre.belloni@free-electrons.com> |
|---|---|
| Date | 2015-12-04 18:10 +0100 |
| Subject | [PATCH v3 01/13] clk: at91: make use of syscon to share PMC registers in several drivers |
| Message-ID | <qC21R-5zk-43@gated-at.bofh.it> |
| In reply to | #1284031 |
From: Boris Brezillon <boris.brezillon@free-electrons.com>
The PMC block is providing several functionnalities:
- system clk management
- cpuidle
- platform suspend
Replace the void __iomem *regs field by a regmap (retrieved using syscon)
so that we can later share the regmap across several drivers without
exporting a new specific API or a global void __iomem * variable.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: Stephen Boyd <sboyd@codeaurora.org>
---
arch/arm/mach-at91/Kconfig | 1 +
drivers/clk/at91/pmc.c | 12 ++++++++----
drivers/clk/at91/pmc.h | 11 ++++++++---
3 files changed, 17 insertions(+), 7 deletions(-)
diff --git a/arch/arm/mach-at91/Kconfig b/arch/arm/mach-at91/Kconfig
index 92673006e55c..dd1571251ea6 100644
--- a/arch/arm/mach-at91/Kconfig
+++ b/arch/arm/mach-at91/Kconfig
@@ -95,6 +95,7 @@ config HAVE_AT91_USB_CLK
config COMMON_CLK_AT91
bool
select COMMON_CLK
+ select MFD_SYSCON
config HAVE_AT91_SMD
bool
diff --git a/drivers/clk/at91/pmc.c b/drivers/clk/at91/pmc.c
index 8476b570779b..481146029b2e 100644
--- a/drivers/clk/at91/pmc.c
+++ b/drivers/clk/at91/pmc.c
@@ -19,6 +19,7 @@
#include <linux/irqchip/chained_irq.h>
#include <linux/irqdomain.h>
#include <linux/of_irq.h>
+#include <linux/mfd/syscon.h>
#include <asm/proc-fns.h>
@@ -223,6 +224,7 @@ static const struct at91_pmc_caps sama5d3_caps = {
};
static struct at91_pmc *__init at91_pmc_init(struct device_node *np,
+ struct regmap *regmap,
void __iomem *regbase, int virq,
const struct at91_pmc_caps *caps)
{
@@ -238,7 +240,7 @@ static struct at91_pmc *__init at91_pmc_init(struct device_node *np,
return NULL;
spin_lock_init(&pmc->lock);
- pmc->regbase = regbase;
+ pmc->regmap = regmap;
pmc->virq = virq;
pmc->caps = caps;
@@ -394,16 +396,18 @@ static void __init of_at91_pmc_setup(struct device_node *np,
void (*clk_setup)(struct device_node *, struct at91_pmc *);
const struct of_device_id *clk_id;
void __iomem *regbase = of_iomap(np, 0);
+ struct regmap *regmap;
int virq;
- if (!regbase)
- return;
+ regmap = syscon_node_to_regmap(np);
+ if (IS_ERR(regmap))
+ panic("Could not retrieve syscon regmap");
virq = irq_of_parse_and_map(np, 0);
if (!virq)
return;
- pmc = at91_pmc_init(np, regbase, virq, caps);
+ pmc = at91_pmc_init(np, regmap, regbase, virq, caps);
if (!pmc)
return;
for_each_child_of_node(np, childnp) {
diff --git a/drivers/clk/at91/pmc.h b/drivers/clk/at91/pmc.h
index f65739272779..e1fc0b0e1d8c 100644
--- a/drivers/clk/at91/pmc.h
+++ b/drivers/clk/at91/pmc.h
@@ -14,6 +14,7 @@
#include <linux/io.h>
#include <linux/irqdomain.h>
+#include <linux/regmap.h>
#include <linux/spinlock.h>
struct clk_range {
@@ -28,7 +29,7 @@ struct at91_pmc_caps {
};
struct at91_pmc {
- void __iomem *regbase;
+ struct regmap *regmap;
int virq;
spinlock_t lock;
const struct at91_pmc_caps *caps;
@@ -48,12 +49,16 @@ static inline void pmc_unlock(struct at91_pmc *pmc)
static inline u32 pmc_read(struct at91_pmc *pmc, int offset)
{
- return readl(pmc->regbase + offset);
+ unsigned int ret = 0;
+
+ regmap_read(pmc->regmap, offset, &ret);
+
+ return ret;
}
static inline void pmc_write(struct at91_pmc *pmc, int offset, u32 value)
{
- writel(value, pmc->regbase + offset);
+ regmap_write(pmc->regmap, offset, value);
}
int of_at91_get_clk_range(struct device_node *np, const char *propname,
--
2.5.0
--
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| From | Alexandre Belloni <alexandre.belloni@free-electrons.com> |
|---|---|
| Date | 2015-12-04 18:10 +0100 |
| Subject | [PATCH v3 12/13] usb: gadget: atmel: access the PMC using regmap |
| Message-ID | <qC21R-5zk-59@gated-at.bofh.it> |
| In reply to | #1284031 |
Use regmap to access the PMC to avoid using at91_pmc_read and
at91_pmc_write.
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: Felipe Balbi <balbi@ti.com>
---
drivers/usb/gadget/udc/atmel_usba_udc.c | 20 ++++++++++----------
drivers/usb/gadget/udc/atmel_usba_udc.h | 2 ++
2 files changed, 12 insertions(+), 10 deletions(-)
diff --git a/drivers/usb/gadget/udc/atmel_usba_udc.c b/drivers/usb/gadget/udc/atmel_usba_udc.c
index f0f2b066ac08..eb82239dafac 100644
--- a/drivers/usb/gadget/udc/atmel_usba_udc.c
+++ b/drivers/usb/gadget/udc/atmel_usba_udc.c
@@ -17,7 +17,9 @@
#include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/list.h>
+#include <linux/mfd/syscon.h>
#include <linux/platform_device.h>
+#include <linux/regmap.h>
#include <linux/usb/ch9.h>
#include <linux/usb/gadget.h>
#include <linux/usb/atmel_usba_udc.h>
@@ -1888,20 +1890,15 @@ static int atmel_usba_stop(struct usb_gadget *gadget)
#ifdef CONFIG_OF
static void at91sam9rl_toggle_bias(struct usba_udc *udc, int is_on)
{
- unsigned int uckr = at91_pmc_read(AT91_CKGR_UCKR);
-
- if (is_on)
- at91_pmc_write(AT91_CKGR_UCKR, uckr | AT91_PMC_BIASEN);
- else
- at91_pmc_write(AT91_CKGR_UCKR, uckr & ~(AT91_PMC_BIASEN));
+ regmap_update_bits(udc->pmc, AT91_CKGR_UCKR, AT91_PMC_BIASEN,
+ is_on ? AT91_PMC_BIASEN : 0);
}
static void at91sam9g45_pulse_bias(struct usba_udc *udc)
{
- unsigned int uckr = at91_pmc_read(AT91_CKGR_UCKR);
-
- at91_pmc_write(AT91_CKGR_UCKR, uckr & ~(AT91_PMC_BIASEN));
- at91_pmc_write(AT91_CKGR_UCKR, uckr | AT91_PMC_BIASEN);
+ regmap_update_bits(udc->pmc, AT91_CKGR_UCKR, AT91_PMC_BIASEN, 0);
+ regmap_update_bits(udc->pmc, AT91_CKGR_UCKR, AT91_PMC_BIASEN,
+ AT91_PMC_BIASEN);
}
static const struct usba_udc_errata at91sam9rl_errata = {
@@ -1938,6 +1935,9 @@ static struct usba_ep * atmel_udc_of_init(struct platform_device *pdev,
return ERR_PTR(-EINVAL);
udc->errata = match->data;
+ udc->pmc = syscon_regmap_lookup_by_compatible("atmel,at91sam9g45-pmc");
+ if (udc->errata && IS_ERR(udc->pmc))
+ return ERR_CAST(udc->pmc);
udc->num_ep = 0;
diff --git a/drivers/usb/gadget/udc/atmel_usba_udc.h b/drivers/usb/gadget/udc/atmel_usba_udc.h
index ea448a344767..3e1c9d589dfa 100644
--- a/drivers/usb/gadget/udc/atmel_usba_udc.h
+++ b/drivers/usb/gadget/udc/atmel_usba_udc.h
@@ -354,6 +354,8 @@ struct usba_udc {
struct dentry *debugfs_root;
struct dentry *debugfs_regs;
#endif
+
+ struct regmap *pmc;
};
static inline struct usba_ep *to_usba_ep(struct usb_ep *ep)
--
2.5.0
--
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| From | Alexandre Belloni <alexandre.belloni@free-electrons.com> |
|---|---|
| Date | 2015-12-04 18:10 +0100 |
| Subject | [PATCH v3 09/13] ARM: at91: pm: find and remap the pmc |
| Message-ID | <qC21S-5zk-61@gated-at.bofh.it> |
| In reply to | #1284031 |
To avoid relying on at91_pmc_read(), find the pmc node and remap it
locally.
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
---
arch/arm/mach-at91/pm.c | 33 +++++++++++++++++++++++++++------
1 file changed, 27 insertions(+), 6 deletions(-)
diff --git a/arch/arm/mach-at91/pm.c b/arch/arm/mach-at91/pm.c
index 5c2b60c5a2a1..38e93174031d 100644
--- a/arch/arm/mach-at91/pm.c
+++ b/arch/arm/mach-at91/pm.c
@@ -35,6 +35,8 @@
#include "generic.h"
#include "pm.h"
+void __iomem *pmc;
+
/*
* FIXME: this is needed to communicate between the pinctrl driver and
* the PM implementation in the machine. Possibly part of the PM
@@ -85,7 +87,7 @@ static int at91_pm_verify_clocks(void)
unsigned long scsr;
int i;
- scsr = at91_pmc_read(AT91_PMC_SCSR);
+ scsr = readl(pmc + AT91_PMC_SCSR);
/* USB must not be using PLLB */
if ((scsr & at91_pm_data.uhp_udp_mask) != 0) {
@@ -99,8 +101,7 @@ static int at91_pm_verify_clocks(void)
if ((scsr & (AT91_PMC_PCK0 << i)) == 0)
continue;
-
- css = at91_pmc_read(AT91_PMC_PCKR(i)) & AT91_PMC_CSS;
+ css = readl(pmc + AT91_PMC_PCKR(i)) & AT91_PMC_CSS;
if (css != AT91_PMC_CSS_SLOW) {
pr_err("AT91: PM - Suspend-to-RAM with PCK%d src %d\n", i, css);
return 0;
@@ -143,8 +144,8 @@ static void at91_pm_suspend(suspend_state_t state)
flush_cache_all();
outer_disable();
- at91_suspend_sram_fn(at91_pmc_base, at91_ramc_base[0],
- at91_ramc_base[1], pm_data);
+ at91_suspend_sram_fn(pmc, at91_ramc_base[0],
+ at91_ramc_base[1], pm_data);
outer_resume();
}
@@ -394,13 +395,33 @@ static void __init at91_pm_sram_init(void)
&at91_pm_suspend_in_sram, at91_pm_suspend_in_sram_sz);
}
+static const struct of_device_id atmel_pmc_ids[] = {
+ { .compatible = "atmel,at91rm9200-pmc" },
+ { .compatible = "atmel,at91sam9260-pmc" },
+ { .compatible = "atmel,at91sam9g45-pmc" },
+ { .compatible = "atmel,at91sam9n12-pmc" },
+ { .compatible = "atmel,at91sam9x5-pmc" },
+ { .compatible = "atmel,sama5d3-pmc" },
+ { .compatible = "atmel,sama5d2-pmc" },
+ { /* sentinel */ },
+};
+
static void __init at91_pm_init(void)
{
- at91_pm_sram_init();
+ struct device_node *pmc_np;
if (at91_cpuidle_device.dev.platform_data)
platform_device_register(&at91_cpuidle_device);
+ pmc_np = of_find_matching_node(NULL, atmel_pmc_ids);
+ pmc = of_iomap(pmc_np, 0);
+ if (!pmc) {
+ pr_info("AT91: PM not supported, PMC not found\n");
+ return;
+ }
+
+ at91_pm_sram_init();
+
if (at91_suspend_sram_fn)
suspend_set_ops(&at91_pm_ops);
else
--
2.5.0
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| From | Alexandre Belloni <alexandre.belloni@free-electrons.com> |
|---|---|
| Date | 2015-12-04 18:10 +0100 |
| Subject | [PATCH v3 07/13] clk: at91: pmc: move pmc structures to C file |
| Message-ID | <qC21S-5zk-65@gated-at.bofh.it> |
| In reply to | #1284031 |
pmc.c is now the only user of struct at91_pmc*, move their definition in
the C file.
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
---
drivers/clk/at91/pmc.c | 12 ++++++++++++
drivers/clk/at91/pmc.h | 12 ------------
2 files changed, 12 insertions(+), 12 deletions(-)
diff --git a/drivers/clk/at91/pmc.c b/drivers/clk/at91/pmc.c
index 55ed00fc9310..cfbfea6d641f 100644
--- a/drivers/clk/at91/pmc.c
+++ b/drivers/clk/at91/pmc.c
@@ -29,6 +29,18 @@
#include "pmc.h"
+struct at91_pmc_caps {
+ u32 available_irqs;
+};
+
+struct at91_pmc {
+ struct regmap *regmap;
+ int virq;
+ const struct at91_pmc_caps *caps;
+ struct irq_domain *irqdomain;
+ u32 imr;
+};
+
void __iomem *at91_pmc_base;
EXPORT_SYMBOL_GPL(at91_pmc_base);
diff --git a/drivers/clk/at91/pmc.h b/drivers/clk/at91/pmc.h
index 3b96c53c194c..550a461c7201 100644
--- a/drivers/clk/at91/pmc.h
+++ b/drivers/clk/at91/pmc.h
@@ -24,18 +24,6 @@ struct clk_range {
#define CLK_RANGE(MIN, MAX) {.min = MIN, .max = MAX,}
-struct at91_pmc_caps {
- u32 available_irqs;
-};
-
-struct at91_pmc {
- struct regmap *regmap;
- int virq;
- const struct at91_pmc_caps *caps;
- struct irq_domain *irqdomain;
- u32 imr;
-};
-
int of_at91_get_clk_range(struct device_node *np, const char *propname,
struct clk_range *range);
--
2.5.0
--
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| From | Alexandre Belloni <alexandre.belloni@free-electrons.com> |
|---|---|
| Date | 2015-12-04 18:10 +0100 |
| Subject | [PATCH v3 08/13] ARM: at91: pm: simply call at91_pm_init |
| Message-ID | <qC21T-5zk-79@gated-at.bofh.it> |
| In reply to | #1284031 |
at91_pm_init() doesn't return a value, as is the case for its callers, simply call it instead of returning its non-existent return value. Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> --- arch/arm/mach-at91/pm.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/arch/arm/mach-at91/pm.c b/arch/arm/mach-at91/pm.c index 80e277cfcc8b..5c2b60c5a2a1 100644 --- a/arch/arm/mach-at91/pm.c +++ b/arch/arm/mach-at91/pm.c @@ -427,7 +427,7 @@ void __init at91sam9260_pm_init(void) at91_dt_ramc(); at91_pm_data.memctrl = AT91_MEMCTRL_SDRAMC; at91_pm_data.uhp_udp_mask = AT91SAM926x_PMC_UHP | AT91SAM926x_PMC_UDP; - return at91_pm_init(); + at91_pm_init(); } void __init at91sam9g45_pm_init(void) @@ -435,7 +435,7 @@ void __init at91sam9g45_pm_init(void) at91_dt_ramc(); at91_pm_data.uhp_udp_mask = AT91SAM926x_PMC_UHP; at91_pm_data.memctrl = AT91_MEMCTRL_DDRSDR; - return at91_pm_init(); + at91_pm_init(); } void __init at91sam9x5_pm_init(void) @@ -443,5 +443,5 @@ void __init at91sam9x5_pm_init(void) at91_dt_ramc(); at91_pm_data.uhp_udp_mask = AT91SAM926x_PMC_UHP | AT91SAM926x_PMC_UDP; at91_pm_data.memctrl = AT91_MEMCTRL_DDRSDR; - return at91_pm_init(); + at91_pm_init(); } -- 2.5.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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| From | Alexandre Belloni <alexandre.belloni@free-electrons.com> |
|---|---|
| Date | 2015-12-04 18:10 +0100 |
| Subject | [PATCH v3 13/13] clk: at91: pmc: drop at91_pmc_base |
| Message-ID | <qC21U-5zk-101@gated-at.bofh.it> |
| In reply to | #1284031 |
at91_pmc_base is not used anymore, remove it along with at91_pmc_read and
at91_pmc_write.
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
---
drivers/clk/at91/pmc.c | 5 -----
include/linux/clk/at91_pmc.h | 12 ------------
2 files changed, 17 deletions(-)
diff --git a/drivers/clk/at91/pmc.c b/drivers/clk/at91/pmc.c
index c7bd8c17acad..60dcac1500e5 100644
--- a/drivers/clk/at91/pmc.c
+++ b/drivers/clk/at91/pmc.c
@@ -41,9 +41,6 @@ struct at91_pmc {
u32 imr;
};
-void __iomem *at91_pmc_base;
-EXPORT_SYMBOL_GPL(at91_pmc_base);
-
int of_at91_get_clk_range(struct device_node *np, const char *propname,
struct clk_range *range)
{
@@ -249,8 +246,6 @@ static int __init atmel_pmc_probe(struct platform_device *pdev)
int virq;
int ret = 0;
- at91_pmc_base = of_iomap(np, 0);
-
regmap = syscon_node_to_regmap(np);
if (IS_ERR(regmap))
panic("Could not retrieve syscon regmap");
diff --git a/include/linux/clk/at91_pmc.h b/include/linux/clk/at91_pmc.h
index 1e6932222e11..17f413bbbedf 100644
--- a/include/linux/clk/at91_pmc.h
+++ b/include/linux/clk/at91_pmc.h
@@ -16,18 +16,6 @@
#ifndef AT91_PMC_H
#define AT91_PMC_H
-#ifndef __ASSEMBLY__
-extern void __iomem *at91_pmc_base;
-
-#define at91_pmc_read(field) \
- readl_relaxed(at91_pmc_base + field)
-
-#define at91_pmc_write(field, value) \
- writel_relaxed(value, at91_pmc_base + field)
-#else
-.extern at91_pmc_base
-#endif
-
#define AT91_PMC_SCER 0x00 /* System Clock Enable Register */
#define AT91_PMC_SCDR 0x04 /* System Clock Disable Register */
--
2.5.0
--
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| From | Alexandre Belloni <alexandre.belloni@free-electrons.com> |
|---|---|
| Date | 2015-12-04 18:10 +0100 |
| Subject | [PATCH v3 11/13] ARM: at91: remove useless includes and function prototypes |
| Message-ID | <qC21U-5zk-109@gated-at.bofh.it> |
| In reply to | #1284031 |
Remove leftover from the previous cleanup Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> --- arch/arm/mach-at91/generic.h | 7 ------- 1 file changed, 7 deletions(-) diff --git a/arch/arm/mach-at91/generic.h b/arch/arm/mach-at91/generic.h index d224e195706a..28ca57a2060f 100644 --- a/arch/arm/mach-at91/generic.h +++ b/arch/arm/mach-at91/generic.h @@ -11,13 +11,6 @@ #ifndef _AT91_GENERIC_H #define _AT91_GENERIC_H -#include <linux/of.h> -#include <linux/reboot.h> - - /* Map io */ -extern void __init at91_map_io(void); -extern void __init at91_alt_map_io(void); - #ifdef CONFIG_PM extern void __init at91rm9200_pm_init(void); extern void __init at91sam9260_pm_init(void); -- 2.5.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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| From | Alexandre Belloni <alexandre.belloni@free-electrons.com> |
|---|---|
| Date | 2015-12-04 18:20 +0100 |
| Subject | [PATCH v3 04/13] clk: at91: make IRQ optional and register them later |
| Message-ID | <qC2bw-5CT-15@gated-at.bofh.it> |
| In reply to | #1284031 |
The AT91 clock drivers make use of IRQs to avoid polling when waiting for
some clocks to be enabled. Unfortunately, this leads to a crash when those
IRQs are threaded (which happens when using preempt-rt) because they are
registered before thread creation is possible.
Use polling on those clocks until the IRQ is registered and register the
IRQ at module probe time.
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
---
drivers/clk/at91/clk-main.c | 152 ++++++++++++++++++++++--------------------
drivers/clk/at91/clk-master.c | 74 ++++++++++++++------
drivers/clk/at91/clk-pll.c | 75 +++++++++++++++------
drivers/clk/at91/clk-system.c | 79 +++++++++++++++-------
drivers/clk/at91/clk-utmi.c | 75 ++++++++++++++-------
drivers/clk/at91/pmc.c | 106 ++++++++++++-----------------
6 files changed, 337 insertions(+), 224 deletions(-)
diff --git a/drivers/clk/at91/clk-main.c b/drivers/clk/at91/clk-main.c
index 5841eb958f83..4b021714e801 100644
--- a/drivers/clk/at91/clk-main.c
+++ b/drivers/clk/at91/clk-main.c
@@ -8,6 +8,7 @@
*
*/
+#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/clkdev.h>
#include <linux/clk/at91_pmc.h>
@@ -22,6 +23,8 @@
#include <linux/regmap.h>
#include <linux/sched.h>
#include <linux/wait.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
#include "pmc.h"
@@ -110,9 +113,13 @@ static int clk_main_osc_prepare(struct clk_hw *hw)
}
while (!clk_main_osc_ready(regmap)) {
- enable_irq(osc->base.irq);
- wait_event(osc->base.wait,
- clk_main_osc_ready(regmap));
+ if (osc->base.irq) {
+ enable_irq(osc->base.irq);
+ wait_event(osc->base.wait,
+ clk_main_osc_ready(regmap));
+ } else {
+ cpu_relax();
+ }
}
return 0;
@@ -158,17 +165,15 @@ static const struct clk_ops main_osc_ops = {
static struct clk * __init
at91_clk_register_main_osc(struct regmap *regmap,
- unsigned int irq,
const char *name,
const char *parent_name,
bool bypass)
{
- int ret;
struct clk_main_osc *osc;
struct clk *clk = NULL;
struct clk_init_data init;
- if (!irq || !name || !parent_name)
+ if (!name || !parent_name)
return ERR_PTR(-EINVAL);
osc = kzalloc(sizeof(*osc), GFP_KERNEL);
@@ -183,16 +188,6 @@ at91_clk_register_main_osc(struct regmap *regmap,
osc->base.hw.init = &init;
osc->base.regmap = regmap;
- osc->base.irq = irq;
-
- init_waitqueue_head(&osc->base.wait);
- irq_set_status_flags(irq, IRQ_NOAUTOEN);
- ret = request_irq(irq, clk_main_irq_handler,
- IRQF_TRIGGER_HIGH, name, &osc->base);
- if (ret) {
- kfree(osc);
- return ERR_PTR(ret);
- }
if (bypass)
regmap_update_bits(regmap,
@@ -201,10 +196,8 @@ at91_clk_register_main_osc(struct regmap *regmap,
AT91_PMC_OSCBYPASS | AT91_PMC_KEY);
clk = clk_register(NULL, &osc->base.hw);
- if (IS_ERR(clk)) {
- free_irq(irq, osc);
+ if (IS_ERR(clk))
kfree(osc);
- }
return clk;
}
@@ -212,7 +205,6 @@ at91_clk_register_main_osc(struct regmap *regmap,
static void __init of_at91rm9200_clk_main_osc_setup(struct device_node *np)
{
struct clk *clk;
- unsigned int irq;
const char *name = np->name;
const char *parent_name;
struct regmap *regmap;
@@ -226,11 +218,7 @@ static void __init of_at91rm9200_clk_main_osc_setup(struct device_node *np)
if (IS_ERR(regmap))
return;
- irq = irq_of_parse_and_map(np, 0);
- if (!irq)
- return;
-
- clk = at91_clk_register_main_osc(regmap, irq, name, parent_name, bypass);
+ clk = at91_clk_register_main_osc(regmap, name, parent_name, bypass);
if (IS_ERR(clk))
return;
@@ -262,9 +250,13 @@ static int clk_main_rc_osc_prepare(struct clk_hw *hw)
AT91_PMC_MOSCRCEN | AT91_PMC_KEY);
while (!clk_main_rc_osc_ready(regmap)) {
- enable_irq(osc->base.irq);
- wait_event(osc->base.wait,
- clk_main_rc_osc_ready(regmap));
+ if (osc->base.irq) {
+ enable_irq(osc->base.irq);
+ wait_event(osc->base.wait,
+ clk_main_rc_osc_ready(regmap));
+ } else {
+ cpu_relax();
+ }
}
return 0;
@@ -323,11 +315,9 @@ static const struct clk_ops main_rc_osc_ops = {
static struct clk * __init
at91_clk_register_main_rc_osc(struct regmap *regmap,
- unsigned int irq,
const char *name,
u32 frequency, u32 accuracy)
{
- int ret;
struct clk_main_rc_osc *osc;
struct clk *clk = NULL;
struct clk_init_data init;
@@ -347,22 +337,12 @@ at91_clk_register_main_rc_osc(struct regmap *regmap,
osc->base.hw.init = &init;
osc->base.regmap = regmap;
- osc->base.irq = irq;
osc->frequency = frequency;
osc->accuracy = accuracy;
- init_waitqueue_head(&osc->base.wait);
- irq_set_status_flags(irq, IRQ_NOAUTOEN);
- ret = request_irq(irq, clk_main_irq_handler,
- IRQF_TRIGGER_HIGH, name, &osc->base);
- if (ret)
- return ERR_PTR(ret);
-
clk = clk_register(NULL, &osc->base.hw);
- if (IS_ERR(clk)) {
- free_irq(irq, osc);
+ if (IS_ERR(clk))
kfree(osc);
- }
return clk;
}
@@ -370,7 +350,6 @@ at91_clk_register_main_rc_osc(struct regmap *regmap,
static void __init of_at91sam9x5_clk_main_rc_osc_setup(struct device_node *np)
{
struct clk *clk;
- unsigned int irq;
u32 frequency = 0;
u32 accuracy = 0;
const char *name = np->name;
@@ -380,16 +359,11 @@ static void __init of_at91sam9x5_clk_main_rc_osc_setup(struct device_node *np)
of_property_read_u32(np, "clock-frequency", &frequency);
of_property_read_u32(np, "clock-accuracy", &accuracy);
- irq = irq_of_parse_and_map(np, 0);
- if (!irq)
- return;
-
regmap = syscon_node_to_regmap(of_get_parent(np));
if (IS_ERR(regmap))
return;
- clk = at91_clk_register_main_rc_osc(regmap, irq, name, frequency,
- accuracy);
+ clk = at91_clk_register_main_rc_osc(regmap, name, frequency, accuracy);
if (IS_ERR(clk))
return;
@@ -536,9 +510,13 @@ static int clk_sam9x5_main_prepare(struct clk_hw *hw)
struct regmap *regmap = clkmain->base.regmap;
while (!clk_sam9x5_main_ready(regmap)) {
- enable_irq(clkmain->base.irq);
- wait_event(clkmain->base.wait,
- clk_sam9x5_main_ready(regmap));
+ if (clkmain->base.irq) {
+ enable_irq(clkmain->base.irq);
+ wait_event(clkmain->base.wait,
+ clk_sam9x5_main_ready(regmap));
+ } else {
+ cpu_relax();
+ }
}
return clk_main_probe_frequency(regmap);
@@ -577,9 +555,13 @@ static int clk_sam9x5_main_set_parent(struct clk_hw *hw, u8 index)
regmap_write(regmap, AT91_CKGR_MOR, tmp & ~AT91_PMC_MOSCSEL);
while (!clk_sam9x5_main_ready(regmap)) {
- enable_irq(clkmain->base.irq);
- wait_event(clkmain->base.wait,
- clk_sam9x5_main_ready(regmap));
+ if (clkmain->base.irq) {
+ enable_irq(clkmain->base.irq);
+ wait_event(clkmain->base.wait,
+ clk_sam9x5_main_ready(regmap));
+ } else {
+ cpu_relax();
+ }
}
return 0;
@@ -605,12 +587,10 @@ static const struct clk_ops sam9x5_main_ops = {
static struct clk * __init
at91_clk_register_sam9x5_main(struct regmap *regmap,
- unsigned int irq,
const char *name,
const char **parent_names,
int num_parents)
{
- int ret;
struct clk_sam9x5_main *clkmain;
struct clk *clk = NULL;
struct clk_init_data init;
@@ -634,21 +614,12 @@ at91_clk_register_sam9x5_main(struct regmap *regmap,
clkmain->base.hw.init = &init;
clkmain->base.regmap = regmap;
- clkmain->base.irq = irq;
regmap_read(clkmain->base.regmap, AT91_CKGR_MOR, &status);
clkmain->parent = status & AT91_PMC_MOSCEN ? 1 : 0;
- init_waitqueue_head(&clkmain->base.wait);
- irq_set_status_flags(irq, IRQ_NOAUTOEN);
- ret = request_irq(irq, clk_main_irq_handler,
- IRQF_TRIGGER_HIGH, name, &clkmain->base);
- if (ret)
- return ERR_PTR(ret);
clk = clk_register(NULL, &clkmain->base.hw);
- if (IS_ERR(clk)) {
- free_irq(irq, clkmain);
+ if (IS_ERR(clk))
kfree(clkmain);
- }
return clk;
}
@@ -658,7 +629,6 @@ static void __init of_at91sam9x5_clk_main_setup(struct device_node *np)
struct clk *clk;
const char *parent_names[2];
int num_parents;
- unsigned int irq;
const char *name = np->name;
struct regmap *regmap;
@@ -673,11 +643,7 @@ static void __init of_at91sam9x5_clk_main_setup(struct device_node *np)
of_property_read_string(np, "clock-output-names", &name);
- irq = irq_of_parse_and_map(np, 0);
- if (!irq)
- return;
-
- clk = at91_clk_register_sam9x5_main(regmap, irq, name, parent_names,
+ clk = at91_clk_register_sam9x5_main(regmap, name, parent_names,
num_parents);
if (IS_ERR(clk))
return;
@@ -686,3 +652,45 @@ static void __init of_at91sam9x5_clk_main_setup(struct device_node *np)
}
CLK_OF_DECLARE(at91sam9x5_clk_main, "atmel,at91sam9x5-clk-main",
of_at91sam9x5_clk_main_setup);
+
+static const struct of_device_id atmel_clk_main_dt_ids[] = {
+ { .compatible = "atmel,at91rm9200-clk-main-osc" },
+ { .compatible = "atmel,at91sam9x5-clk-main-rc-osc" },
+ { .compatible = "atmel,at91sam9x5-clk-main" },
+ { /* sentinel */ }
+};
+
+static int __init atmel_clk_main_probe(struct platform_device *pdev)
+{
+ struct of_phandle_args clkspec = { .np = pdev->dev.of_node};
+ struct clk_main *clkmain;
+ struct clk_hw *hw;
+ int ret;
+
+ hw = __clk_get_hw(of_clk_get_from_provider(&clkspec));
+ if (!hw)
+ return -ENODEV;
+
+ clkmain = to_clk_main(hw);
+ clkmain->irq = platform_get_irq(pdev, 0);
+ if (!clkmain->irq)
+ return 0;
+
+ init_waitqueue_head(&clkmain->wait);
+ irq_set_status_flags(clkmain->irq, IRQ_NOAUTOEN);
+ ret = devm_request_irq(&pdev->dev, clkmain->irq, clk_main_irq_handler,
+ IRQF_TRIGGER_HIGH, __clk_get_name(hw->clk),
+ clkmain);
+ if (ret)
+ clkmain->irq = 0;
+
+ return ret;
+}
+
+static struct platform_driver atmel_clk_main = {
+ .driver = {
+ .name = "atmel-clk-main",
+ .of_match_table = atmel_clk_main_dt_ids,
+ },
+};
+module_platform_driver_probe(atmel_clk_main, atmel_clk_main_probe);
diff --git a/drivers/clk/at91/clk-master.c b/drivers/clk/at91/clk-master.c
index 8d94ddfc9c72..700d0cbf5cd4 100644
--- a/drivers/clk/at91/clk-master.c
+++ b/drivers/clk/at91/clk-master.c
@@ -8,12 +8,15 @@
*
*/
+#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/clkdev.h>
#include <linux/clk/at91_pmc.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/wait.h>
#include <linux/sched.h>
@@ -77,9 +80,13 @@ static int clk_master_prepare(struct clk_hw *hw)
struct clk_master *master = to_clk_master(hw);
while (!clk_master_ready(master->regmap)) {
- enable_irq(master->irq);
- wait_event(master->wait,
- clk_master_ready(master->regmap));
+ if (master->irq) {
+ enable_irq(master->irq);
+ wait_event(master->wait,
+ clk_master_ready(master->regmap));
+ } else {
+ cpu_relax();
+ }
}
return 0;
@@ -143,13 +150,12 @@ static const struct clk_ops master_ops = {
};
static struct clk * __init
-at91_clk_register_master(struct regmap *regmap, unsigned int irq,
+at91_clk_register_master(struct regmap *regmap,
const char *name, int num_parents,
const char **parent_names,
const struct clk_master_layout *layout,
const struct clk_master_characteristics *characteristics)
{
- int ret;
struct clk_master *master;
struct clk *clk = NULL;
struct clk_init_data init;
@@ -171,19 +177,9 @@ at91_clk_register_master(struct regmap *regmap, unsigned int irq,
master->layout = layout;
master->characteristics = characteristics;
master->regmap = regmap;
- master->irq = irq;
- init_waitqueue_head(&master->wait);
- irq_set_status_flags(master->irq, IRQ_NOAUTOEN);
- ret = request_irq(master->irq, clk_master_irq_handler,
- IRQF_TRIGGER_HIGH, "clk-master", master);
- if (ret) {
- kfree(master);
- return ERR_PTR(ret);
- }
clk = clk_register(NULL, &master->hw);
if (IS_ERR(clk)) {
- free_irq(master->irq, master);
kfree(master);
}
@@ -233,7 +229,6 @@ of_at91_clk_master_setup(struct device_node *np,
{
struct clk *clk;
int num_parents;
- unsigned int irq;
const char *parent_names[MASTER_SOURCE_MAX];
const char *name = np->name;
struct clk_master_characteristics *characteristics;
@@ -255,11 +250,7 @@ of_at91_clk_master_setup(struct device_node *np,
if (IS_ERR(regmap))
return;
- irq = irq_of_parse_and_map(np, 0);
- if (!irq)
- goto out_free_characteristics;
-
- clk = at91_clk_register_master(regmap, irq, name, num_parents,
+ clk = at91_clk_register_master(regmap, name, num_parents,
parent_names, layout,
characteristics);
if (IS_ERR(clk))
@@ -285,3 +276,44 @@ static void __init of_at91sam9x5_clk_master_setup(struct device_node *np)
}
CLK_OF_DECLARE(at91sam9x5_clk_master, "atmel,at91sam9x5-clk-master",
of_at91sam9x5_clk_master_setup);
+
+static const struct of_device_id atmel_clk_master_dt_ids[] = {
+ { .compatible = "atmel,at91rm9200-clk-master" },
+ { .compatible = "atmel,at91sam9x5-clk-master" },
+ { /* sentinel */ }
+};
+
+static int __init atmel_clk_master_probe(struct platform_device *pdev)
+{
+ struct of_phandle_args clkspec = { .np = pdev->dev.of_node};
+ struct clk_master *master;
+ struct clk_hw *hw;
+ int ret;
+
+ hw = __clk_get_hw(of_clk_get_from_provider(&clkspec));
+ if (!hw)
+ return -ENODEV;
+
+ master = to_clk_master(hw);
+ master->irq = platform_get_irq(pdev, 0);
+ if (!master->irq)
+ return 0;
+
+ init_waitqueue_head(&master->wait);
+ irq_set_status_flags(master->irq, IRQ_NOAUTOEN);
+ ret = devm_request_irq(&pdev->dev, master->irq, clk_master_irq_handler,
+ IRQF_TRIGGER_HIGH, __clk_get_name(hw->clk),
+ master);
+ if (ret)
+ master->irq = 0;
+
+ return ret;
+}
+
+static struct platform_driver atmel_clk_master = {
+ .driver = {
+ .name = "atmel-clk-master",
+ .of_match_table = atmel_clk_master_dt_ids,
+ },
+};
+module_platform_driver_probe(atmel_clk_master, atmel_clk_master_probe);
diff --git a/drivers/clk/at91/clk-pll.c b/drivers/clk/at91/clk-pll.c
index 5f4c6ce628e0..0cf69865c2c8 100644
--- a/drivers/clk/at91/clk-pll.c
+++ b/drivers/clk/at91/clk-pll.c
@@ -8,6 +8,7 @@
*
*/
+#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/clkdev.h>
#include <linux/clk/at91_pmc.h>
@@ -21,6 +22,8 @@
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
#include <linux/regmap.h>
#include "pmc.h"
@@ -128,9 +131,13 @@ static int clk_pll_prepare(struct clk_hw *hw)
((pll->mul & layout->mul_mask) << layout->mul_shift));
while (!clk_pll_ready(regmap, pll->id)) {
- enable_irq(pll->irq);
- wait_event(pll->wait,
- clk_pll_ready(regmap, pll->id));
+ if (pll->irq) {
+ enable_irq(pll->irq);
+ wait_event(pll->wait,
+ clk_pll_ready(regmap, pll->id));
+ } else {
+ cpu_relax();
+ }
}
return 0;
@@ -320,7 +327,7 @@ static const struct clk_ops pll_ops = {
};
static struct clk * __init
-at91_clk_register_pll(struct regmap *regmap, unsigned int irq, const char *name,
+at91_clk_register_pll(struct regmap *regmap, const char *name,
const char *parent_name, u8 id,
const struct clk_pll_layout *layout,
const struct clk_pll_characteristics *characteristics)
@@ -328,7 +335,6 @@ at91_clk_register_pll(struct regmap *regmap, unsigned int irq, const char *name,
struct clk_pll *pll;
struct clk *clk = NULL;
struct clk_init_data init;
- int ret;
int offset = PLL_REG(id);
unsigned int pllr;
@@ -350,22 +356,12 @@ at91_clk_register_pll(struct regmap *regmap, unsigned int irq, const char *name,
pll->layout = layout;
pll->characteristics = characteristics;
pll->regmap = regmap;
- pll->irq = irq;
regmap_read(regmap, offset, &pllr);
pll->div = PLL_DIV(pllr);
pll->mul = PLL_MUL(pllr, layout);
- init_waitqueue_head(&pll->wait);
- irq_set_status_flags(pll->irq, IRQ_NOAUTOEN);
- ret = request_irq(pll->irq, clk_pll_irq_handler, IRQF_TRIGGER_HIGH,
- id ? "clk-pllb" : "clk-plla", pll);
- if (ret) {
- kfree(pll);
- return ERR_PTR(ret);
- }
clk = clk_register(NULL, &pll->hw);
if (IS_ERR(clk)) {
- free_irq(pll->irq, pll);
kfree(pll);
}
@@ -499,7 +495,6 @@ of_at91_clk_pll_setup(struct device_node *np,
const struct clk_pll_layout *layout)
{
u32 id;
- unsigned int irq;
struct clk *clk;
struct regmap *regmap;
const char *parent_name;
@@ -521,11 +516,7 @@ of_at91_clk_pll_setup(struct device_node *np,
if (!characteristics)
return;
- irq = irq_of_parse_and_map(np, 0);
- if (!irq)
- return;
-
- clk = at91_clk_register_pll(regmap, irq, name, parent_name, id, layout,
+ clk = at91_clk_register_pll(regmap, name, parent_name, id, layout,
characteristics);
if (IS_ERR(clk))
goto out_free_characteristics;
@@ -564,3 +555,45 @@ static void __init of_sama5d3_clk_pll_setup(struct device_node *np)
}
CLK_OF_DECLARE(sama5d3_clk_pll, "atmel,sama5d3-clk-pll",
of_sama5d3_clk_pll_setup);
+
+static const struct of_device_id atmel_clk_pll_dt_ids[] = {
+ { .compatible = "atmel,at91rm9200-clk-pll" },
+ { .compatible = "atmel,at91sam9g45-clk-pll" },
+ { .compatible = "atmel,at91sam9g20-clk-pllb" },
+ { .compatible = "atmel,sama5d3-clk-pll" },
+ { /* sentinel */ }
+};
+
+static int __init atmel_clk_pll_probe(struct platform_device *pdev)
+{
+ struct of_phandle_args clkspec = { .np = pdev->dev.of_node};
+ struct clk_pll *pll;
+ struct clk_hw *hw;
+ int ret;
+
+ hw = __clk_get_hw(of_clk_get_from_provider(&clkspec));
+ if (!hw)
+ return -ENODEV;
+
+ pll = to_clk_pll(hw);
+ pll->irq = platform_get_irq(pdev, 0);
+ if (!pll->irq)
+ return 0;
+
+ init_waitqueue_head(&pll->wait);
+ irq_set_status_flags(pll->irq, IRQ_NOAUTOEN);
+ ret = devm_request_irq(&pdev->dev, pll->irq, clk_pll_irq_handler,
+ IRQF_TRIGGER_HIGH, __clk_get_name(hw->clk), pll);
+ if (ret)
+ pll->irq = 0;
+
+ return ret;
+}
+
+static struct platform_driver atmel_clk_pll = {
+ .driver = {
+ .name = "atmel-clk-pll",
+ .of_match_table = atmel_clk_pll_dt_ids,
+ },
+};
+module_platform_driver_probe(atmel_clk_pll, atmel_clk_pll_probe);
diff --git a/drivers/clk/at91/clk-system.c b/drivers/clk/at91/clk-system.c
index 0593adf1bf4b..d5fc7bbcc6b3 100644
--- a/drivers/clk/at91/clk-system.c
+++ b/drivers/clk/at91/clk-system.c
@@ -8,6 +8,7 @@
*
*/
+#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/clkdev.h>
#include <linux/clk/at91_pmc.h>
@@ -20,6 +21,8 @@
#include <linux/wait.h>
#include <linux/sched.h>
#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
#include <linux/regmap.h>
#include "pmc.h"
@@ -41,6 +44,7 @@ static inline int is_pck(int id)
{
return (id >= 8) && (id <= 15);
}
+
static irqreturn_t clk_system_irq_handler(int irq, void *dev_id)
{
struct clk_system *sys = (struct clk_system *)dev_id;
@@ -114,12 +118,11 @@ static const struct clk_ops system_ops = {
static struct clk * __init
at91_clk_register_system(struct regmap *regmap, const char *name,
- const char *parent_name, u8 id, int irq)
+ const char *parent_name, u8 id)
{
struct clk_system *sys;
struct clk *clk = NULL;
struct clk_init_data init;
- int ret;
if (!parent_name || id > SYSTEM_MAX_ID)
return ERR_PTR(-EINVAL);
@@ -137,24 +140,10 @@ at91_clk_register_system(struct regmap *regmap, const char *name,
sys->id = id;
sys->hw.init = &init;
sys->regmap = regmap;
- sys->irq = irq;
- if (irq) {
- init_waitqueue_head(&sys->wait);
- irq_set_status_flags(sys->irq, IRQ_NOAUTOEN);
- ret = request_irq(sys->irq, clk_system_irq_handler,
- IRQF_TRIGGER_HIGH, name, sys);
- if (ret) {
- kfree(sys);
- return ERR_PTR(ret);
- }
- }
clk = clk_register(NULL, &sys->hw);
- if (IS_ERR(clk)) {
- if (irq)
- free_irq(sys->irq, sys);
+ if (IS_ERR(clk))
kfree(sys);
- }
return clk;
}
@@ -162,7 +151,6 @@ at91_clk_register_system(struct regmap *regmap, const char *name,
static void __init of_at91rm9200_clk_sys_setup(struct device_node *np)
{
int num;
- int irq = 0;
u32 id;
struct clk *clk;
const char *name;
@@ -185,13 +173,9 @@ static void __init of_at91rm9200_clk_sys_setup(struct device_node *np)
if (of_property_read_string(np, "clock-output-names", &name))
name = sysclknp->name;
- if (is_pck(id))
- irq = irq_of_parse_and_map(sysclknp, 0);
-
parent_name = of_clk_get_parent_name(sysclknp, 0);
- clk = at91_clk_register_system(regmap, name, parent_name, id,
- irq);
+ clk = at91_clk_register_system(regmap, name, parent_name, id);
if (IS_ERR(clk))
continue;
@@ -200,3 +184,52 @@ static void __init of_at91rm9200_clk_sys_setup(struct device_node *np)
}
CLK_OF_DECLARE(at91rm9200_clk_sys, "atmel,at91rm9200-clk-system",
of_at91rm9200_clk_sys_setup);
+
+static const struct of_device_id atmel_clk_sys_dt_ids[] = {
+ { .compatible = "atmel,at91rm9200-clk-system" },
+ { /* sentinel */ }
+};
+
+static int __init atmel_clk_sys_probe(struct platform_device *pdev)
+{
+ struct device_node *np = pdev->dev.of_node;
+ struct device_node *sysclknp;
+
+ for_each_child_of_node(np, sysclknp) {
+ struct of_phandle_args clkspec = { .np = sysclknp};
+ struct clk_hw *hw;
+ struct clk_system *sys;
+ int err;
+
+ hw = __clk_get_hw(of_clk_get_from_provider(&clkspec));
+ if (!hw)
+ continue;
+
+ sys = to_clk_system(hw);
+ if (!is_pck(sys->id))
+ continue;
+
+ sys->irq = irq_of_parse_and_map(sysclknp, 0);
+ if (!sys->irq)
+ continue;
+
+ init_waitqueue_head(&sys->wait);
+ irq_set_status_flags(sys->irq, IRQ_NOAUTOEN);
+ err = devm_request_irq(&pdev->dev, sys->irq,
+ clk_system_irq_handler,
+ IRQF_TRIGGER_HIGH,
+ __clk_get_name(hw->clk), sys);
+ if (err)
+ sys->irq = 0;
+ }
+
+ return 0;
+}
+
+static struct platform_driver atmel_clk_sys = {
+ .driver = {
+ .name = "atmel-clk-sys",
+ .of_match_table = atmel_clk_sys_dt_ids,
+ },
+};
+module_platform_driver_probe(atmel_clk_sys, atmel_clk_sys_probe);
diff --git a/drivers/clk/at91/clk-utmi.c b/drivers/clk/at91/clk-utmi.c
index 58a310e5768c..1f2fbf3bd13e 100644
--- a/drivers/clk/at91/clk-utmi.c
+++ b/drivers/clk/at91/clk-utmi.c
@@ -8,6 +8,7 @@
*
*/
+#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/clkdev.h>
#include <linux/clk/at91_pmc.h>
@@ -20,6 +21,8 @@
#include <linux/sched.h>
#include <linux/wait.h>
#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
#include <linux/regmap.h>
#include "pmc.h"
@@ -63,9 +66,13 @@ static int clk_utmi_prepare(struct clk_hw *hw)
regmap_update_bits(utmi->regmap, AT91_CKGR_UCKR, uckr, uckr);
while (!clk_utmi_ready(utmi->regmap)) {
- enable_irq(utmi->irq);
- wait_event(utmi->wait,
- clk_utmi_ready(utmi->regmap));
+ if (utmi->irq) {
+ enable_irq(utmi->irq);
+ wait_event(utmi->wait,
+ clk_utmi_ready(utmi->regmap));
+ } else {
+ cpu_relax();
+ }
}
return 0;
@@ -100,10 +107,9 @@ static const struct clk_ops utmi_ops = {
};
static struct clk * __init
-at91_clk_register_utmi(struct regmap *regmap, unsigned int irq,
+at91_clk_register_utmi(struct regmap *regmap,
const char *name, const char *parent_name)
{
- int ret;
struct clk_utmi *utmi;
struct clk *clk = NULL;
struct clk_init_data init;
@@ -120,28 +126,16 @@ at91_clk_register_utmi(struct regmap *regmap, unsigned int irq,
utmi->hw.init = &init;
utmi->regmap = regmap;
- utmi->irq = irq;
- init_waitqueue_head(&utmi->wait);
- irq_set_status_flags(utmi->irq, IRQ_NOAUTOEN);
- ret = request_irq(utmi->irq, clk_utmi_irq_handler,
- IRQF_TRIGGER_HIGH, "clk-utmi", utmi);
- if (ret) {
- kfree(utmi);
- return ERR_PTR(ret);
- }
clk = clk_register(NULL, &utmi->hw);
- if (IS_ERR(clk)) {
- free_irq(utmi->irq, utmi);
+ if (IS_ERR(clk))
kfree(utmi);
- }
return clk;
}
static void __init of_at91sam9x5_clk_utmi_setup(struct device_node *np)
{
- unsigned int irq;
struct clk *clk;
const char *parent_name;
const char *name = np->name;
@@ -151,15 +145,11 @@ static void __init of_at91sam9x5_clk_utmi_setup(struct device_node *np)
of_property_read_string(np, "clock-output-names", &name);
- irq = irq_of_parse_and_map(np, 0);
- if (!irq)
- return;
-
regmap = syscon_node_to_regmap(of_get_parent(np));
if (IS_ERR(regmap))
return;
- clk = at91_clk_register_utmi(regmap, irq, name, parent_name);
+ clk = at91_clk_register_utmi(regmap, name, parent_name);
if (IS_ERR(clk))
return;
@@ -168,3 +158,42 @@ static void __init of_at91sam9x5_clk_utmi_setup(struct device_node *np)
}
CLK_OF_DECLARE(at91sam9x5_clk_utmi, "atmel,at91sam9x5-clk-utmi",
of_at91sam9x5_clk_utmi_setup);
+
+static const struct of_device_id atmel_clk_utmi_dt_ids[] = {
+ { .compatible = "atmel,at91sam9x5-clk-utmi" },
+ { /* sentinel */ }
+};
+
+static int __init atmel_clk_utmi_probe(struct platform_device *pdev)
+{
+ struct of_phandle_args clkspec = { .np = pdev->dev.of_node};
+ struct clk_utmi *utmi;
+ struct clk_hw *hw;
+ int ret;
+
+ hw = __clk_get_hw(of_clk_get_from_provider(&clkspec));
+ if (!hw)
+ return -ENODEV;
+
+ utmi = to_clk_utmi(hw);
+ utmi->irq = platform_get_irq(pdev, 0);
+ if (!utmi->irq)
+ return 0;
+
+ init_waitqueue_head(&utmi->wait);
+ irq_set_status_flags(utmi->irq, IRQ_NOAUTOEN);
+ ret = devm_request_irq(&pdev->dev, utmi->irq, clk_utmi_irq_handler,
+ IRQF_TRIGGER_HIGH, __clk_get_name(hw->clk), utmi);
+ if (ret)
+ utmi->irq = 0;
+
+ return ret;
+}
+
+static struct platform_driver atmel_clk_utmi = {
+ .driver = {
+ .name = "atmel-clk-utmi",
+ .of_match_table = atmel_clk_utmi_dt_ids,
+ },
+};
+module_platform_driver_probe(atmel_clk_utmi, atmel_clk_utmi_probe);
diff --git a/drivers/clk/at91/pmc.c b/drivers/clk/at91/pmc.c
index 295b17b9c689..296d20a29c6c 100644
--- a/drivers/clk/at91/pmc.c
+++ b/drivers/clk/at91/pmc.c
@@ -20,6 +20,9 @@
#include <linux/irqdomain.h>
#include <linux/of_irq.h>
#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <asm/proc-fns.h>
@@ -248,32 +251,30 @@ static struct at91_pmc *__init at91_pmc_init(struct device_node *np,
pmc->virq = virq;
pmc->caps = caps;
- pmc->irqdomain = irq_domain_add_linear(np, 32, &pmc_irq_ops, pmc);
- if (!pmc->irqdomain)
- goto out_free_pmc;
-
- regmap_write(pmc->regmap, AT91_PMC_IDR, 0xffffffff);
- if (request_irq(pmc->virq, pmc_irq_handler,
- IRQF_SHARED | IRQF_COND_SUSPEND, "pmc", pmc))
- goto out_remove_irqdomain;
-
return pmc;
-
-out_remove_irqdomain:
- irq_domain_remove(pmc->irqdomain);
-out_free_pmc:
- kfree(pmc);
-
- return NULL;
}
-static void __init of_at91_pmc_setup(struct device_node *np,
- const struct at91_pmc_caps *caps)
+static const struct of_device_id atmel_pmc_dt_ids[] = {
+ { .compatible = "atmel,at91rm9200-pmc", .data = &at91rm9200_caps },
+ { .compatible = "atmel,at91sam9260-pmc", .data = &at91sam9260_caps },
+ { .compatible = "atmel,at91sam9g45-pmc", .data = &at91sam9g45_caps },
+ { .compatible = "atmel,at91sam9n12-pmc", .data = &at91sam9n12_caps },
+ { .compatible = "atmel,at91sam9x5-pmc", .data = &at91sam9x5_caps },
+ { .compatible = "atmel,sama5d2-pmc", .data = &sama5d2_caps },
+ { .compatible = "atmel,sama5d3-pmc", .data = &sama5d3_caps },
+ { /* sentinel */ },
+};
+
+static int __init atmel_pmc_probe(struct platform_device *pdev)
{
+ const struct of_device_id *of_id;
+ const struct at91_pmc_caps *caps;
+ struct device_node *np = pdev->dev.of_node;
struct at91_pmc *pmc;
void __iomem *regbase = of_iomap(np, 0);
struct regmap *regmap;
int virq;
+ int ret = 0;
regmap = syscon_node_to_regmap(np);
if (IS_ERR(regmap))
@@ -281,58 +282,35 @@ static void __init of_at91_pmc_setup(struct device_node *np,
virq = irq_of_parse_and_map(np, 0);
if (!virq)
- return;
+ return 0;
+
+ of_id = of_match_device(atmel_pmc_dt_ids, &pdev->dev);
+ caps = of_id->data;
pmc = at91_pmc_init(np, regmap, regbase, virq, caps);
if (!pmc)
- return;
-}
-
-static void __init of_at91rm9200_pmc_setup(struct device_node *np)
-{
- of_at91_pmc_setup(np, &at91rm9200_caps);
-}
-CLK_OF_DECLARE(at91rm9200_clk_pmc, "atmel,at91rm9200-pmc",
- of_at91rm9200_pmc_setup);
-
-static void __init of_at91sam9260_pmc_setup(struct device_node *np)
-{
- of_at91_pmc_setup(np, &at91sam9260_caps);
-}
-CLK_OF_DECLARE(at91sam9260_clk_pmc, "atmel,at91sam9260-pmc",
- of_at91sam9260_pmc_setup);
+ return 0;
-static void __init of_at91sam9g45_pmc_setup(struct device_node *np)
-{
- of_at91_pmc_setup(np, &at91sam9g45_caps);
-}
-CLK_OF_DECLARE(at91sam9g45_clk_pmc, "atmel,at91sam9g45-pmc",
- of_at91sam9g45_pmc_setup);
+ pmc->irqdomain = irq_domain_add_linear(pdev->dev.of_node, 32,
+ &pmc_irq_ops, pmc);
+ if (!pmc->irqdomain)
+ return 0;
-static void __init of_at91sam9n12_pmc_setup(struct device_node *np)
-{
- of_at91_pmc_setup(np, &at91sam9n12_caps);
-}
-CLK_OF_DECLARE(at91sam9n12_clk_pmc, "atmel,at91sam9n12-pmc",
- of_at91sam9n12_pmc_setup);
+ regmap_write(pmc->regmap, AT91_PMC_IDR, 0xffffffff);
+ ret = request_irq(pmc->virq, pmc_irq_handler,
+ IRQF_SHARED | IRQF_COND_SUSPEND, "pmc", pmc);
+ if (ret)
+ return ret;
-static void __init of_at91sam9x5_pmc_setup(struct device_node *np)
-{
- of_at91_pmc_setup(np, &at91sam9x5_caps);
-}
-CLK_OF_DECLARE(at91sam9x5_clk_pmc, "atmel,at91sam9x5-pmc",
- of_at91sam9x5_pmc_setup);
+ of_platform_populate(pdev->dev.of_node, NULL, NULL, &pdev->dev);
-static void __init of_sama5d2_pmc_setup(struct device_node *np)
-{
- of_at91_pmc_setup(np, &sama5d2_caps);
+ return 0;
}
-CLK_OF_DECLARE(sama5d2_clk_pmc, "atmel,sama5d2-pmc",
- of_sama5d2_pmc_setup);
-static void __init of_sama5d3_pmc_setup(struct device_node *np)
-{
- of_at91_pmc_setup(np, &sama5d3_caps);
-}
-CLK_OF_DECLARE(sama5d3_clk_pmc, "atmel,sama5d3-pmc",
- of_sama5d3_pmc_setup);
+static struct platform_driver atmel_pmc = {
+ .driver = {
+ .name = "atmel-pmc",
+ .of_match_table = atmel_pmc_dt_ids,
+ },
+};
+module_platform_driver_probe(atmel_pmc, atmel_pmc_probe);
--
2.5.0
--
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| From | Alexandre Belloni <alexandre.belloni@free-electrons.com> |
|---|---|
| Date | 2015-12-04 18:20 +0100 |
| Subject | [PATCH v3 03/13] clk: at91: clk-main: factorize irq handling |
| Message-ID | <qC2bw-5CT-19@gated-at.bofh.it> |
| In reply to | #1284031 |
The three different irq handlers are doing the same thing, factorize their
code in a generic irq handler.
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
---
drivers/clk/at91/clk-main.c | 144 +++++++++++++++++++-------------------------
1 file changed, 63 insertions(+), 81 deletions(-)
diff --git a/drivers/clk/at91/clk-main.c b/drivers/clk/at91/clk-main.c
index c1f119748bdc..5841eb958f83 100644
--- a/drivers/clk/at91/clk-main.c
+++ b/drivers/clk/at91/clk-main.c
@@ -34,25 +34,28 @@
#define MOR_KEY_MASK (0xff << 16)
-struct clk_main_osc {
+struct clk_main {
struct clk_hw hw;
struct regmap *regmap;
unsigned int irq;
wait_queue_head_t wait;
};
-#define to_clk_main_osc(hw) container_of(hw, struct clk_main_osc, hw)
+#define to_clk_main(hw) container_of(hw, struct clk_main, hw)
+
+struct clk_main_osc {
+ struct clk_main base;
+};
+
+#define to_clk_main_osc(hw) container_of(hw, struct clk_main_osc, base.hw)
struct clk_main_rc_osc {
- struct clk_hw hw;
- struct regmap *regmap;
- unsigned int irq;
- wait_queue_head_t wait;
+ struct clk_main base;
unsigned long frequency;
unsigned long accuracy;
};
-#define to_clk_main_rc_osc(hw) container_of(hw, struct clk_main_rc_osc, hw)
+#define to_clk_main_rc_osc(hw) container_of(hw, struct clk_main_rc_osc, base.hw)
struct clk_rm9200_main {
struct clk_hw hw;
@@ -62,21 +65,20 @@ struct clk_rm9200_main {
#define to_clk_rm9200_main(hw) container_of(hw, struct clk_rm9200_main, hw)
struct clk_sam9x5_main {
- struct clk_hw hw;
- struct regmap *regmap;
- unsigned int irq;
- wait_queue_head_t wait;
+ struct clk_main base;
u8 parent;
};
-#define to_clk_sam9x5_main(hw) container_of(hw, struct clk_sam9x5_main, hw)
+#define to_clk_sam9x5_main(hw) container_of(hw, struct clk_sam9x5_main, base.hw)
-static irqreturn_t clk_main_osc_irq_handler(int irq, void *dev_id)
+/* Generic structure */
+
+static irqreturn_t clk_main_irq_handler(int irq, void *dev_id)
{
- struct clk_main_osc *osc = dev_id;
+ struct clk_main *clkmain = dev_id;
- wake_up(&osc->wait);
- disable_irq_nosync(osc->irq);
+ wake_up(&clkmain->wait);
+ disable_irq_nosync(clkmain->irq);
return IRQ_HANDLED;
}
@@ -93,7 +95,7 @@ static inline bool clk_main_osc_ready(struct regmap *regmap)
static int clk_main_osc_prepare(struct clk_hw *hw)
{
struct clk_main_osc *osc = to_clk_main_osc(hw);
- struct regmap *regmap = osc->regmap;
+ struct regmap *regmap = osc->base.regmap;
u32 tmp;
regmap_read(regmap, AT91_CKGR_MOR, &tmp);
@@ -108,8 +110,8 @@ static int clk_main_osc_prepare(struct clk_hw *hw)
}
while (!clk_main_osc_ready(regmap)) {
- enable_irq(osc->irq);
- wait_event(osc->wait,
+ enable_irq(osc->base.irq);
+ wait_event(osc->base.wait,
clk_main_osc_ready(regmap));
}
@@ -119,7 +121,7 @@ static int clk_main_osc_prepare(struct clk_hw *hw)
static void clk_main_osc_unprepare(struct clk_hw *hw)
{
struct clk_main_osc *osc = to_clk_main_osc(hw);
- struct regmap *regmap = osc->regmap;
+ struct regmap *regmap = osc->base.regmap;
u32 tmp;
regmap_read(regmap, AT91_CKGR_MOR, &tmp);
@@ -136,7 +138,7 @@ static void clk_main_osc_unprepare(struct clk_hw *hw)
static int clk_main_osc_is_prepared(struct clk_hw *hw)
{
struct clk_main_osc *osc = to_clk_main_osc(hw);
- struct regmap *regmap = osc->regmap;
+ struct regmap *regmap = osc->base.regmap;
u32 tmp, status;
regmap_read(regmap, AT91_CKGR_MOR, &tmp);
@@ -179,14 +181,14 @@ at91_clk_register_main_osc(struct regmap *regmap,
init.num_parents = 1;
init.flags = CLK_IGNORE_UNUSED;
- osc->hw.init = &init;
- osc->regmap = regmap;
- osc->irq = irq;
+ osc->base.hw.init = &init;
+ osc->base.regmap = regmap;
+ osc->base.irq = irq;
- init_waitqueue_head(&osc->wait);
- irq_set_status_flags(osc->irq, IRQ_NOAUTOEN);
- ret = request_irq(osc->irq, clk_main_osc_irq_handler,
- IRQF_TRIGGER_HIGH, name, osc);
+ init_waitqueue_head(&osc->base.wait);
+ irq_set_status_flags(irq, IRQ_NOAUTOEN);
+ ret = request_irq(irq, clk_main_irq_handler,
+ IRQF_TRIGGER_HIGH, name, &osc->base);
if (ret) {
kfree(osc);
return ERR_PTR(ret);
@@ -198,7 +200,7 @@ at91_clk_register_main_osc(struct regmap *regmap,
AT91_PMC_MOSCEN,
AT91_PMC_OSCBYPASS | AT91_PMC_KEY);
- clk = clk_register(NULL, &osc->hw);
+ clk = clk_register(NULL, &osc->base.hw);
if (IS_ERR(clk)) {
free_irq(irq, osc);
kfree(osc);
@@ -237,16 +239,6 @@ static void __init of_at91rm9200_clk_main_osc_setup(struct device_node *np)
CLK_OF_DECLARE(at91rm9200_clk_main_osc, "atmel,at91rm9200-clk-main-osc",
of_at91rm9200_clk_main_osc_setup);
-static irqreturn_t clk_main_rc_osc_irq_handler(int irq, void *dev_id)
-{
- struct clk_main_rc_osc *osc = dev_id;
-
- wake_up(&osc->wait);
- disable_irq_nosync(osc->irq);
-
- return IRQ_HANDLED;
-}
-
static bool clk_main_rc_osc_ready(struct regmap *regmap)
{
unsigned int status;
@@ -259,7 +251,7 @@ static bool clk_main_rc_osc_ready(struct regmap *regmap)
static int clk_main_rc_osc_prepare(struct clk_hw *hw)
{
struct clk_main_rc_osc *osc = to_clk_main_rc_osc(hw);
- struct regmap *regmap = osc->regmap;
+ struct regmap *regmap = osc->base.regmap;
unsigned int mor;
regmap_read(regmap, AT91_CKGR_MOR, &mor);
@@ -270,8 +262,8 @@ static int clk_main_rc_osc_prepare(struct clk_hw *hw)
AT91_PMC_MOSCRCEN | AT91_PMC_KEY);
while (!clk_main_rc_osc_ready(regmap)) {
- enable_irq(osc->irq);
- wait_event(osc->wait,
+ enable_irq(osc->base.irq);
+ wait_event(osc->base.wait,
clk_main_rc_osc_ready(regmap));
}
@@ -281,7 +273,7 @@ static int clk_main_rc_osc_prepare(struct clk_hw *hw)
static void clk_main_rc_osc_unprepare(struct clk_hw *hw)
{
struct clk_main_rc_osc *osc = to_clk_main_rc_osc(hw);
- struct regmap *regmap = osc->regmap;
+ struct regmap *regmap = osc->base.regmap;
unsigned int mor;
regmap_read(regmap, AT91_CKGR_MOR, &mor);
@@ -296,7 +288,7 @@ static void clk_main_rc_osc_unprepare(struct clk_hw *hw)
static int clk_main_rc_osc_is_prepared(struct clk_hw *hw)
{
struct clk_main_rc_osc *osc = to_clk_main_rc_osc(hw);
- struct regmap *regmap = osc->regmap;
+ struct regmap *regmap = osc->base.regmap;
unsigned int mor, status;
regmap_read(regmap, AT91_CKGR_MOR, &mor);
@@ -353,20 +345,20 @@ at91_clk_register_main_rc_osc(struct regmap *regmap,
init.num_parents = 0;
init.flags = CLK_IS_ROOT | CLK_IGNORE_UNUSED;
- osc->hw.init = &init;
- osc->regmap = regmap;
- osc->irq = irq;
+ osc->base.hw.init = &init;
+ osc->base.regmap = regmap;
+ osc->base.irq = irq;
osc->frequency = frequency;
osc->accuracy = accuracy;
- init_waitqueue_head(&osc->wait);
- irq_set_status_flags(osc->irq, IRQ_NOAUTOEN);
- ret = request_irq(osc->irq, clk_main_rc_osc_irq_handler,
- IRQF_TRIGGER_HIGH, name, osc);
+ init_waitqueue_head(&osc->base.wait);
+ irq_set_status_flags(irq, IRQ_NOAUTOEN);
+ ret = request_irq(irq, clk_main_irq_handler,
+ IRQF_TRIGGER_HIGH, name, &osc->base);
if (ret)
return ERR_PTR(ret);
- clk = clk_register(NULL, &osc->hw);
+ clk = clk_register(NULL, &osc->base.hw);
if (IS_ERR(clk)) {
free_irq(irq, osc);
kfree(osc);
@@ -529,16 +521,6 @@ static void __init of_at91rm9200_clk_main_setup(struct device_node *np)
CLK_OF_DECLARE(at91rm9200_clk_main, "atmel,at91rm9200-clk-main",
of_at91rm9200_clk_main_setup);
-static irqreturn_t clk_sam9x5_main_irq_handler(int irq, void *dev_id)
-{
- struct clk_sam9x5_main *clkmain = dev_id;
-
- wake_up(&clkmain->wait);
- disable_irq_nosync(clkmain->irq);
-
- return IRQ_HANDLED;
-}
-
static inline bool clk_sam9x5_main_ready(struct regmap *regmap)
{
unsigned int status;
@@ -551,11 +533,11 @@ static inline bool clk_sam9x5_main_ready(struct regmap *regmap)
static int clk_sam9x5_main_prepare(struct clk_hw *hw)
{
struct clk_sam9x5_main *clkmain = to_clk_sam9x5_main(hw);
- struct regmap *regmap = clkmain->regmap;
+ struct regmap *regmap = clkmain->base.regmap;
while (!clk_sam9x5_main_ready(regmap)) {
- enable_irq(clkmain->irq);
- wait_event(clkmain->wait,
+ enable_irq(clkmain->base.irq);
+ wait_event(clkmain->base.wait,
clk_sam9x5_main_ready(regmap));
}
@@ -566,7 +548,7 @@ static int clk_sam9x5_main_is_prepared(struct clk_hw *hw)
{
struct clk_sam9x5_main *clkmain = to_clk_sam9x5_main(hw);
- return clk_sam9x5_main_ready(clkmain->regmap);
+ return clk_sam9x5_main_ready(clkmain->base.regmap);
}
static unsigned long clk_sam9x5_main_recalc_rate(struct clk_hw *hw,
@@ -574,13 +556,13 @@ static unsigned long clk_sam9x5_main_recalc_rate(struct clk_hw *hw,
{
struct clk_sam9x5_main *clkmain = to_clk_sam9x5_main(hw);
- return clk_main_recalc_rate(clkmain->regmap, parent_rate);
+ return clk_main_recalc_rate(clkmain->base.regmap, parent_rate);
}
static int clk_sam9x5_main_set_parent(struct clk_hw *hw, u8 index)
{
struct clk_sam9x5_main *clkmain = to_clk_sam9x5_main(hw);
- struct regmap *regmap = clkmain->regmap;
+ struct regmap *regmap = clkmain->base.regmap;
unsigned int tmp;
if (index > 1)
@@ -595,8 +577,8 @@ static int clk_sam9x5_main_set_parent(struct clk_hw *hw, u8 index)
regmap_write(regmap, AT91_CKGR_MOR, tmp & ~AT91_PMC_MOSCSEL);
while (!clk_sam9x5_main_ready(regmap)) {
- enable_irq(clkmain->irq);
- wait_event(clkmain->wait,
+ enable_irq(clkmain->base.irq);
+ wait_event(clkmain->base.wait,
clk_sam9x5_main_ready(regmap));
}
@@ -608,7 +590,7 @@ static u8 clk_sam9x5_main_get_parent(struct clk_hw *hw)
struct clk_sam9x5_main *clkmain = to_clk_sam9x5_main(hw);
unsigned int status;
- regmap_read(clkmain->regmap, AT91_CKGR_MOR, &status);
+ regmap_read(clkmain->base.regmap, AT91_CKGR_MOR, &status);
return status & AT91_PMC_MOSCEN ? 1 : 0;
}
@@ -650,21 +632,21 @@ at91_clk_register_sam9x5_main(struct regmap *regmap,
init.num_parents = num_parents;
init.flags = CLK_SET_PARENT_GATE;
- clkmain->hw.init = &init;
- clkmain->regmap = regmap;
- clkmain->irq = irq;
- regmap_read(clkmain->regmap, AT91_CKGR_MOR, &status);
+ clkmain->base.hw.init = &init;
+ clkmain->base.regmap = regmap;
+ clkmain->base.irq = irq;
+ regmap_read(clkmain->base.regmap, AT91_CKGR_MOR, &status);
clkmain->parent = status & AT91_PMC_MOSCEN ? 1 : 0;
- init_waitqueue_head(&clkmain->wait);
- irq_set_status_flags(clkmain->irq, IRQ_NOAUTOEN);
- ret = request_irq(clkmain->irq, clk_sam9x5_main_irq_handler,
- IRQF_TRIGGER_HIGH, name, clkmain);
+ init_waitqueue_head(&clkmain->base.wait);
+ irq_set_status_flags(irq, IRQ_NOAUTOEN);
+ ret = request_irq(irq, clk_main_irq_handler,
+ IRQF_TRIGGER_HIGH, name, &clkmain->base);
if (ret)
return ERR_PTR(ret);
- clk = clk_register(NULL, &clkmain->hw);
+ clk = clk_register(NULL, &clkmain->base.hw);
if (IS_ERR(clk)) {
- free_irq(clkmain->irq, clkmain);
+ free_irq(irq, clkmain);
kfree(clkmain);
}
--
2.5.0
--
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[toc] | [prev] | [next] | [standalone]
| From | Alexandre Belloni <alexandre.belloni@free-electrons.com> |
|---|---|
| Date | 2015-12-04 18:20 +0100 |
| Subject | [PATCH v3 06/13] clk: at91: pmc: merge at91_pmc_init in atmel_pmc_probe |
| Message-ID | <qC2bx-5CT-29@gated-at.bofh.it> |
| In reply to | #1284031 |
at91_pmc_init() doesn't do much anymore, merge it in atmel_pmc_probe().
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
---
drivers/clk/at91/pmc.c | 31 ++++++-------------------------
1 file changed, 6 insertions(+), 25 deletions(-)
diff --git a/drivers/clk/at91/pmc.c b/drivers/clk/at91/pmc.c
index 2f8b9503176f..55ed00fc9310 100644
--- a/drivers/clk/at91/pmc.c
+++ b/drivers/clk/at91/pmc.c
@@ -231,29 +231,6 @@ static const struct at91_pmc_caps sama5d3_caps = {
AT91_PMC_CFDEV,
};
-static struct at91_pmc *__init at91_pmc_init(struct device_node *np,
- struct regmap *regmap,
- void __iomem *regbase, int virq,
- const struct at91_pmc_caps *caps)
-{
- struct at91_pmc *pmc;
-
- if (!regbase || !virq || !caps)
- return NULL;
-
- at91_pmc_base = regbase;
-
- pmc = kzalloc(sizeof(*pmc), GFP_KERNEL);
- if (!pmc)
- return NULL;
-
- pmc->regmap = regmap;
- pmc->virq = virq;
- pmc->caps = caps;
-
- return pmc;
-}
-
static const struct of_device_id atmel_pmc_dt_ids[] = {
{ .compatible = "atmel,at91rm9200-pmc", .data = &at91rm9200_caps },
{ .compatible = "atmel,at91sam9260-pmc", .data = &at91sam9260_caps },
@@ -271,11 +248,12 @@ static int __init atmel_pmc_probe(struct platform_device *pdev)
const struct at91_pmc_caps *caps;
struct device_node *np = pdev->dev.of_node;
struct at91_pmc *pmc;
- void __iomem *regbase = of_iomap(np, 0);
struct regmap *regmap;
int virq;
int ret = 0;
+ at91_pmc_base = of_iomap(np, 0);
+
regmap = syscon_node_to_regmap(np);
if (IS_ERR(regmap))
panic("Could not retrieve syscon regmap");
@@ -287,10 +265,13 @@ static int __init atmel_pmc_probe(struct platform_device *pdev)
of_id = of_match_device(atmel_pmc_dt_ids, &pdev->dev);
caps = of_id->data;
- pmc = at91_pmc_init(np, regmap, regbase, virq, caps);
+ pmc = kzalloc(sizeof(*pmc), GFP_KERNEL);
if (!pmc)
return 0;
+ pmc->regmap = regmap;
+ pmc->virq = virq;
+ pmc->caps = caps;
pmc->irqdomain = irq_domain_add_linear(pdev->dev.of_node, 32,
&pmc_irq_ops, pmc);
if (!pmc->irqdomain)
--
2.5.0
--
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[toc] | [prev] | [next] | [standalone]
| From | Alexandre Belloni <alexandre.belloni@free-electrons.com> |
|---|---|
| Date | 2015-12-04 18:20 +0100 |
| Subject | [PATCH v3 05/13] clk: at91: only disable available IRQs |
| Message-ID | <qC2bx-5CT-41@gated-at.bofh.it> |
| In reply to | #1284031 |
From: Boris Brezillon <boris.brezillon@free-electrons.com> Only disable available IRQs in case writing to a reserved bit has a harmful effect. Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> --- drivers/clk/at91/pmc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/clk/at91/pmc.c b/drivers/clk/at91/pmc.c index 296d20a29c6c..2f8b9503176f 100644 --- a/drivers/clk/at91/pmc.c +++ b/drivers/clk/at91/pmc.c @@ -296,7 +296,7 @@ static int __init atmel_pmc_probe(struct platform_device *pdev) if (!pmc->irqdomain) return 0; - regmap_write(pmc->regmap, AT91_PMC_IDR, 0xffffffff); + regmap_write(pmc->regmap, AT91_PMC_IDR, pmc->caps->available_irqs); ret = request_irq(pmc->virq, pmc_irq_handler, IRQF_SHARED | IRQF_COND_SUSPEND, "pmc", pmc); if (ret) -- 2.5.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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| From | Boris Brezillon <boris.brezillon@free-electrons.com> |
|---|---|
| Date | 2015-12-10 18:10 +0100 |
| Message-ID | <qEcT9-Dg-49@gated-at.bofh.it> |
| In reply to | #1284031 |
On Fri, 4 Dec 2015 18:03:35 +0100 Alexandre Belloni <alexandre.belloni@free-electrons.com> wrote: > Hi, > > This patch set is a cleanup that properly separate drivers needing to access the > PMC (PM and USB) from the clock driver by exposing the PMC as a syscon. > > This also allows to implement a fix for preempt-rt. Currently, at91 platform are > crashing when using preempt-rt because the irq handler are transformed in > threaded irq handler but at the time the pmc registers its clocks, it is not > possible to creat threads, leading to a NULL pointer dereference in the kernel. > > The new infrastructure uses polling until it is late enough to register threaded > irqs. > > Note that there is an ugly global spinlock for the peripheral and generated > clocks. More infrastructure is needed in syscon to get rid of that one. We will > be working on that. To the whole series, Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com> > > Changes in v3: > - rebased on v4.4-rc1 and so included the sama5d2 and the generated clocks > - fixed comments from Wenyou > > Alexandre Belloni (10): > clk: at91: clk-main: factorize irq handling > clk: at91: make IRQ optional and register them later > clk: at91: pmc: merge at91_pmc_init in atmel_pmc_probe > clk: at91: pmc: move pmc structures to C file > ARM: at91: pm: simply call at91_pm_init > ARM: at91: pm: find and remap the pmc > ARM: at91: pm: move idle functions to pm.c > ARM: at91: remove useless includes and function prototypes > usb: gadget: atmel: access the PMC using regmap > clk: at91: pmc: drop at91_pmc_base > > Boris Brezillon (3): > clk: at91: make use of syscon to share PMC registers in several > drivers > clk: at91: make use of syscon/regmap internally > clk: at91: only disable available IRQs > > arch/arm/mach-at91/Kconfig | 1 + > arch/arm/mach-at91/at91rm9200.c | 2 - > arch/arm/mach-at91/at91sam9.c | 2 - > arch/arm/mach-at91/generic.h | 13 +- > arch/arm/mach-at91/pm.c | 70 +++++- > arch/arm/mach-at91/sama5.c | 2 +- > drivers/clk/at91/clk-generated.c | 95 ++++--- > drivers/clk/at91/clk-h32mx.c | 32 ++- > drivers/clk/at91/clk-main.c | 430 ++++++++++++++++++-------------- > drivers/clk/at91/clk-master.c | 134 ++++++---- > drivers/clk/at91/clk-peripheral.c | 135 +++++----- > drivers/clk/at91/clk-pll.c | 190 +++++++++----- > drivers/clk/at91/clk-plldiv.c | 42 ++-- > drivers/clk/at91/clk-programmable.c | 92 ++++--- > drivers/clk/at91/clk-slow.c | 27 +- > drivers/clk/at91/clk-smd.c | 54 ++-- > drivers/clk/at91/clk-system.c | 129 +++++++--- > drivers/clk/at91/clk-usb.c | 121 +++++---- > drivers/clk/at91/clk-utmi.c | 116 ++++++--- > drivers/clk/at91/pmc.c | 314 +++++------------------ > drivers/clk/at91/pmc.h | 96 +------ > drivers/usb/gadget/udc/atmel_usba_udc.c | 20 +- > drivers/usb/gadget/udc/atmel_usba_udc.h | 2 + > include/linux/clk/at91_pmc.h | 12 - > 24 files changed, 1111 insertions(+), 1020 deletions(-) > -- Boris Brezillon, Free Electrons Embedded Linux and Kernel engineering http://free-electrons.com -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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