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[PATCH v17 08/15] clocksource/drivers/arm_arch_timer: move arch_timer_needs_of_probing into DT init call

From fu.wei@linaro.org
Newsgroups linux.kernel
Subject [PATCH v17 08/15] clocksource/drivers/arm_arch_timer: move arch_timer_needs_of_probing into DT init call
Date 2016-11-25 10:00 +0100
Message-ID <sHkwp-6MV-11@gated-at.bofh.it> (permalink)
References <sHkmK-6J9-7@gated-at.bofh.it>
Organization linux.* mail to news gateway

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From: Fu Wei <fu.wei@linaro.org>

Because arch_timer_needs_of_probing is only for booting with device-tree,
but arch_timer_common_init is a generic init call which shouldn't include
the FW-specific code. It's better to put arch_timer_needs_of_probing into
DT init function.

But for per-cpu timer, the arch_timer_common_init is called from
arch_timer_init. For reaching the goal above, this patch disassemble
arch_timer_init and use arch_timer_register and arch_timer_common_init
directly, just like arch_timer_mem init code is doing.
By this way, all the DT relevant code are only called from DT init call.

Signed-off-by: Fu Wei <fu.wei@linaro.org>
---
 drivers/clocksource/arm_arch_timer.c | 45 ++++++++++++++++--------------------
 1 file changed, 20 insertions(+), 25 deletions(-)

diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c
index 2c9085a..4549008 100644
--- a/drivers/clocksource/arm_arch_timer.c
+++ b/drivers/clocksource/arm_arch_timer.c
@@ -821,9 +821,6 @@ static bool __init arch_timer_needs_of_probing(void)
 
 static int __init arch_timer_common_init(void)
 {
-	if (acpi_disabled && arch_timer_needs_of_probing())
-		return 0;
-
 	arch_timer_banner(arch_timers_present);
 	arch_counter_register(arch_timers_present);
 	return arch_timer_arch_init();
@@ -861,26 +858,9 @@ static enum arch_timer_ppi_nr __init arch_timer_select_ppi(void)
 	return ARCH_TIMER_PHYS_SECURE_PPI;
 }
 
-static int __init arch_timer_init(void)
-{
-	int ret;
-
-	ret = arch_timer_register();
-	if (ret)
-		return ret;
-
-	ret = arch_timer_common_init();
-	if (ret)
-		return ret;
-
-	arch_timer_kvm_info.virtual_irq = arch_timer_ppi[ARCH_TIMER_VIRT_PPI];
-
-	return 0;
-}
-
 static int __init arch_timer_of_init(struct device_node *np)
 {
-	int i;
+	int i, ret;
 
 	if (arch_timers_present & ARCH_TIMER_TYPE_CP15) {
 		pr_warn("multiple nodes in dt, skipping\n");
@@ -891,6 +871,8 @@ static int __init arch_timer_of_init(struct device_node *np)
 	for (i = ARCH_TIMER_PHYS_SECURE_PPI; i < ARCH_TIMER_MAX_TIMER_PPI; i++)
 		arch_timer_ppi[i] = irq_of_parse_and_map(np, i);
 
+	arch_timer_kvm_info.virtual_irq = arch_timer_ppi[ARCH_TIMER_VIRT_PPI];
+
 	if (!arch_timer_rate &&
 	    of_property_read_u32(np, "clock-frequency", &arch_timer_rate))
 		arch_timer_detect_rate();
@@ -921,7 +903,14 @@ static int __init arch_timer_of_init(struct device_node *np)
 		return -EINVAL;
 	}
 
-	return arch_timer_init();
+	ret = arch_timer_register();
+	if (ret)
+		return ret;
+
+	if (arch_timer_needs_of_probing())
+		return 0;
+
+	return arch_timer_common_init();
 }
 CLOCKSOURCE_OF_DECLARE(armv7_arch_timer, "arm,armv7-timer", arch_timer_of_init);
 CLOCKSOURCE_OF_DECLARE(armv8_arch_timer, "arm,armv8-timer", arch_timer_of_init);
@@ -1008,7 +997,8 @@ static int __init arch_timer_mem_init(struct device_node *np)
 	if (ret)
 		goto out;
 
-	return arch_timer_common_init();
+	if (!arch_timer_needs_of_probing())
+		ret = arch_timer_common_init();
 out:
 	iounmap(cntctlbase);
 	of_node_put(best_frame);
@@ -1064,6 +1054,8 @@ static int __init arch_timer_acpi_init(struct acpi_table_header *table)
 		map_generic_timer_interrupt(gtdt->non_secure_el2_interrupt,
 		gtdt->non_secure_el2_flags);
 
+	arch_timer_kvm_info.virtual_irq = arch_timer_ppi[ARCH_TIMER_VIRT_PPI];
+
 	/* Get the frequency from CNTFRQ */
 	arch_timer_detect_rate();
 
@@ -1076,8 +1068,11 @@ static int __init arch_timer_acpi_init(struct acpi_table_header *table)
 	/* Always-on capability */
 	arch_timer_c3stop = !(gtdt->non_secure_el1_flags & ACPI_GTDT_ALWAYS_ON);
 
-	arch_timer_init();
-	return 0;
+	ret = arch_timer_register();
+	if (ret)
+		return ret;
+
+	return arch_timer_common_init();
 }
 CLOCKSOURCE_ACPI_DECLARE(arch_timer, ACPI_SIG_GTDT, arch_timer_acpi_init);
 #endif
-- 
2.9.3

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[PATCH v17 00/15] acpi, clocksource: add GTDT driver and GTDT support in arm_arch_timer fu.wei@linaro.org - 2016-11-25 09:50 +0100
  [PATCH v17 13/15] acpi/arm64: Add memory-mapped timer support in GTDT driver fu.wei@linaro.org - 2016-11-25 09:50 +0100
  [PATCH v17 04/15] clocksource/drivers/arm_arch_timer: rename some enums and defines. fu.wei@linaro.org - 2016-11-25 09:50 +0100
  [PATCH v17 11/15] acpi/arm64: Add GTDT table parse driver fu.wei@linaro.org - 2016-11-25 09:50 +0100
  [PATCH v17 10/15] clocksource/drivers/arm_arch_timer: Refactor the timer init code to prepare for GTDT fu.wei@linaro.org - 2016-11-25 09:50 +0100
  [PATCH v17 14/15] clocksource/drivers/arm_arch_timer: Add GTDT support for memory-mapped timer fu.wei@linaro.org - 2016-11-25 09:50 +0100
  [PATCH v17 05/15] clocksource/drivers/arm_arch_timer: rework PPI determination fu.wei@linaro.org - 2016-11-25 09:50 +0100
  [PATCH v17 03/15] clocksource/drivers/arm_arch_timer: Improve printk relevant code fu.wei@linaro.org - 2016-11-25 09:50 +0100
  [PATCH v17 09/15] clocksource/drivers/arm_arch_timer: Introduce some new structs to prepare for GTDT fu.wei@linaro.org - 2016-11-25 09:50 +0100
  [PATCH v17 01/15] clocksource/drivers/arm_arch_timer: Move enums and defines to header file fu.wei@linaro.org - 2016-11-25 09:50 +0100
  [PATCH v17 06/15] clocksource/drivers/arm_arch_timer: Rework counter frequency detection. fu.wei@linaro.org - 2016-11-25 09:50 +0100
  [PATCH v17 07/15] clocksource/drivers/arm_arch_timer: Refactor arch_timer_needs_probing fu.wei@linaro.org - 2016-11-25 09:50 +0100
  [PATCH v17 02/15] clocksource/drivers/arm_arch_timer: Add a new enum for spi type fu.wei@linaro.org - 2016-11-25 09:50 +0100
  [PATCH v17 08/15] clocksource/drivers/arm_arch_timer: move arch_timer_needs_of_probing into DT init call fu.wei@linaro.org - 2016-11-25 10:00 +0100
    Re: [PATCH v17 08/15] clocksource/drivers/arm_arch_timer: move  arch_timer_needs_of_probing into DT init call Fu Wei <fu.wei@linaro.org> - 2016-11-25 16:10 +0100
      Re: [Linaro-acpi] [PATCH v17 08/15] clocksource/drivers/arm_arch_timer:  move arch_timer_needs_of_probing into DT init call Timur Tabi <timur@codeaurora.org> - 2016-12-07 18:30 +0100
        Re: [Linaro-acpi] [PATCH v17 08/15] clocksource/drivers/arm_arch_timer:  move arch_timer_needs_of_probing into DT init call Fu Wei <fu.wei@linaro.org> - 2016-12-08 04:20 +0100
          Re: [Linaro-acpi] [PATCH v17 08/15]  clocksource/drivers/arm_arch_timer: move arch_timer_needs_of_probing into DT  init call Mark Rutland <mark.rutland@arm.com> - 2016-12-08 12:10 +0100
            Re: [Linaro-acpi] [PATCH v17 08/15] clocksource/drivers/arm_arch_timer:  move arch_timer_needs_of_probing into DT init call Fu Wei <fu.wei@linaro.org> - 2016-12-08 12:30 +0100
  [PATCH v17 12/15] clocksource/drivers/arm_arch_timer: Simplify ACPI support code. fu.wei@linaro.org - 2016-11-25 10:00 +0100
  [PATCH v17 15/15] acpi/arm64: Add SBSA Generic Watchdog support in GTDT driver fu.wei@linaro.org - 2016-11-25 10:00 +0100

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