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[PATCH v1 0/2] mfd: intel-lpss: fix a bug and clean up

Started byAndy Shevchenko <andriy.shevchenko@linux.intel.com>
First post2015-09-14 10:40 +0200
Last post2015-09-17 15:20 +0200
Articles 6 — 3 participants

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  [PATCH v1 0/2] mfd: intel-lpss: fix a bug and clean up Andy Shevchenko <andriy.shevchenko@linux.intel.com> - 2015-09-14 10:40 +0200
    [PATCH v1 2/2] mfd: intel-lpss: use writeq() helper Andy Shevchenko <andriy.shevchenko@linux.intel.com> - 2015-09-14 10:40 +0200
      Re: [PATCH v1 2/2] mfd: intel-lpss: use writeq() helper Lee Jones <lee.jones@linaro.org> - 2015-09-20 06:20 +0200
    Re: [PATCH v1 0/2] mfd: intel-lpss: fix a bug and clean up Mika Westerberg <mika.westerberg@linux.intel.com> - 2015-09-14 16:50 +0200
    Re: [PATCH v1 0/2] mfd: intel-lpss: fix a bug and clean up Andy Shevchenko <andriy.shevchenko@linux.intel.com> - 2015-09-17 10:30 +0200
      Re: [PATCH v1 0/2] mfd: intel-lpss: fix a bug and clean up Lee Jones <lee.jones@linaro.org> - 2015-09-17 15:20 +0200

#1223921 — [PATCH v1 0/2] mfd: intel-lpss: fix a bug and clean up

FromAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Date2015-09-14 10:40 +0200
Subject[PATCH v1 0/2] mfd: intel-lpss: fix a bug and clean up
Message-ID<q8xsT-Tg-25@gated-at.bofh.it>
There are two small patches to fix a bug which was found next day after driver
was merged and one clean up to allow 64-bit writes with generic helpers.

Lee, please apply them for v4.3-rc2.

Andy Shevchenko (2):
  mfd: intel-lpss: fix build error when !CONFIG_PM_SLEEP
  mfd: intel-lpss: use writeq() helper

 drivers/mfd/intel-lpss.c | 12 ++++--------
 drivers/mfd/intel-lpss.h |  2 ++
 2 files changed, 6 insertions(+), 8 deletions(-)

-- 
2.5.1

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#1223927 — [PATCH v1 2/2] mfd: intel-lpss: use writeq() helper

FromAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Date2015-09-14 10:40 +0200
Subject[PATCH v1 2/2] mfd: intel-lpss: use writeq() helper
Message-ID<q8xsU-Tg-53@gated-at.bofh.it>
In reply to#1223921
There are already helper functions to do 64-bit I/O on 32-bit machines, thus we
don't need to reinvent the wheel. In our case we can't use readq() / writeq()
even on 64-bit kernel since there is a hardware limitation (OCP bus is a 32-bit
bus).

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 drivers/mfd/intel-lpss.c | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

diff --git a/drivers/mfd/intel-lpss.c b/drivers/mfd/intel-lpss.c
index fdf4d5c..001a7d7 100644
--- a/drivers/mfd/intel-lpss.c
+++ b/drivers/mfd/intel-lpss.c
@@ -26,6 +26,8 @@
 #include <linux/pm_runtime.h>
 #include <linux/seq_file.h>
 
+#include <asm-generic/io-64-nonatomic-lo-hi.h>
+
 #include "intel-lpss.h"
 
 #define LPSS_DEV_OFFSET		0x000
@@ -52,8 +54,7 @@
 #define LPSS_PRIV_SSP_REG		0x20
 #define LPSS_PRIV_SSP_REG_DIS_DMA_FIN	BIT(0)
 
-#define LPSS_PRIV_REMAP_ADDR_LO		0x40
-#define LPSS_PRIV_REMAP_ADDR_HI		0x44
+#define LPSS_PRIV_REMAP_ADDR		0x40
 
 #define LPSS_PRIV_CAPS			0xfc
 #define LPSS_PRIV_CAPS_NO_IDMA		BIT(8)
@@ -250,12 +251,7 @@ static void intel_lpss_set_remap_addr(const struct intel_lpss *lpss)
 {
 	resource_size_t addr = lpss->info->mem->start;
 
-	writel(addr, lpss->priv + LPSS_PRIV_REMAP_ADDR_LO);
-#if BITS_PER_LONG > 32
-	writel(addr >> 32, lpss->priv + LPSS_PRIV_REMAP_ADDR_HI);
-#else
-	writel(0, lpss->priv + LPSS_PRIV_REMAP_ADDR_HI);
-#endif
+	lo_hi_writeq(addr, lpss->priv + LPSS_PRIV_REMAP_ADDR);
 }
 
 static void intel_lpss_deassert_reset(const struct intel_lpss *lpss)
-- 
2.5.1

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#1228814 — Re: [PATCH v1 2/2] mfd: intel-lpss: use writeq() helper

FromLee Jones <lee.jones@linaro.org>
Date2015-09-20 06:20 +0200
SubjectRe: [PATCH v1 2/2] mfd: intel-lpss: use writeq() helper
Message-ID<qaEgx-5MM-5@gated-at.bofh.it>
In reply to#1223927
On Mon, 14 Sep 2015, Andy Shevchenko wrote:

> There are already helper functions to do 64-bit I/O on 32-bit machines, thus we
> don't need to reinvent the wheel. In our case we can't use readq() / writeq()
> even on 64-bit kernel since there is a hardware limitation (OCP bus is a 32-bit
> bus).
> 
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
> ---
>  drivers/mfd/intel-lpss.c | 12 ++++--------
>  1 file changed, 4 insertions(+), 8 deletions(-)

Applied, thanks.

> diff --git a/drivers/mfd/intel-lpss.c b/drivers/mfd/intel-lpss.c
> index fdf4d5c..001a7d7 100644
> --- a/drivers/mfd/intel-lpss.c
> +++ b/drivers/mfd/intel-lpss.c
> @@ -26,6 +26,8 @@
>  #include <linux/pm_runtime.h>
>  #include <linux/seq_file.h>
>  
> +#include <asm-generic/io-64-nonatomic-lo-hi.h>
> +
>  #include "intel-lpss.h"
>  
>  #define LPSS_DEV_OFFSET		0x000
> @@ -52,8 +54,7 @@
>  #define LPSS_PRIV_SSP_REG		0x20
>  #define LPSS_PRIV_SSP_REG_DIS_DMA_FIN	BIT(0)
>  
> -#define LPSS_PRIV_REMAP_ADDR_LO		0x40
> -#define LPSS_PRIV_REMAP_ADDR_HI		0x44
> +#define LPSS_PRIV_REMAP_ADDR		0x40
>  
>  #define LPSS_PRIV_CAPS			0xfc
>  #define LPSS_PRIV_CAPS_NO_IDMA		BIT(8)
> @@ -250,12 +251,7 @@ static void intel_lpss_set_remap_addr(const struct intel_lpss *lpss)
>  {
>  	resource_size_t addr = lpss->info->mem->start;
>  
> -	writel(addr, lpss->priv + LPSS_PRIV_REMAP_ADDR_LO);
> -#if BITS_PER_LONG > 32
> -	writel(addr >> 32, lpss->priv + LPSS_PRIV_REMAP_ADDR_HI);
> -#else
> -	writel(0, lpss->priv + LPSS_PRIV_REMAP_ADDR_HI);
> -#endif
> +	lo_hi_writeq(addr, lpss->priv + LPSS_PRIV_REMAP_ADDR);
>  }
>  
>  static void intel_lpss_deassert_reset(const struct intel_lpss *lpss)

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
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#1224207

FromMika Westerberg <mika.westerberg@linux.intel.com>
Date2015-09-14 16:50 +0200
Message-ID<q8DeW-Je-1@gated-at.bofh.it>
In reply to#1223921
On Mon, Sep 14, 2015 at 11:32:46AM +0300, Andy Shevchenko wrote:
> There are two small patches to fix a bug which was found next day after driver
> was merged and one clean up to allow 64-bit writes with generic helpers.
> 
> Lee, please apply them for v4.3-rc2.
> 
> Andy Shevchenko (2):
>   mfd: intel-lpss: fix build error when !CONFIG_PM_SLEEP
>   mfd: intel-lpss: use writeq() helper
> 
>  drivers/mfd/intel-lpss.c | 12 ++++--------
>  drivers/mfd/intel-lpss.h |  2 ++
>  2 files changed, 6 insertions(+), 8 deletions(-)

For both,

Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
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#1226749

FromAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Date2015-09-17 10:30 +0200
Message-ID<q9CJR-6hp-27@gated-at.bofh.it>
In reply to#1223921
On Mon, 2015-09-14 at 11:32 +0300, Andy Shevchenko wrote:
> There are two small patches to fix a bug which was found next day 
> after driver
> was merged and one clean up to allow 64-bit writes with generic 
> helpers.
> 
> Lee, please apply them for v4.3-rc2.

Gentle ping for this series. It would be really nice to have it in v4.3
-rc2.

> 
> Andy Shevchenko (2):
>   mfd: intel-lpss: fix build error when !CONFIG_PM_SLEEP
>   mfd: intel-lpss: use writeq() helper
> 
>  drivers/mfd/intel-lpss.c | 12 ++++--------
>  drivers/mfd/intel-lpss.h |  2 ++
>  2 files changed, 6 insertions(+), 8 deletions(-)
> 

-- 
Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Intel Finland Oy
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#1227019

FromLee Jones <lee.jones@linaro.org>
Date2015-09-17 15:20 +0200
Message-ID<q9Hgt-4Dp-7@gated-at.bofh.it>
In reply to#1226749
On Thu, 17 Sep 2015, Andy Shevchenko wrote:

> On Mon, 2015-09-14 at 11:32 +0300, Andy Shevchenko wrote:
> > There are two small patches to fix a bug which was found next day 
> > after driver
> > was merged and one clean up to allow 64-bit writes with generic 
> > helpers.
> > 
> > Lee, please apply them for v4.3-rc2.
> 
> Gentle ping for this series. It would be really nice to have it in v4.3
> -rc2.

I plan to start reviewing again tomorrow (on the plane), as I have a
few loose ends to tie up before travelling.

> > Andy Shevchenko (2):
> >   mfd: intel-lpss: fix build error when !CONFIG_PM_SLEEP
> >   mfd: intel-lpss: use writeq() helper
> > 
> >  drivers/mfd/intel-lpss.c | 12 ++++--------
> >  drivers/mfd/intel-lpss.h |  2 ++
> >  2 files changed, 6 insertions(+), 8 deletions(-)
> > 
> 

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
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