linux-kernel - [PATCH 5/8] ARM: at91: move the restart function to the system timer driver

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Message-Id: <1420459605-24561-6-git-send-email-alexandre.belloni@free-electrons.com>
Date:	Mon,  5 Jan 2015 13:06:42 +0100
From:	Alexandre Belloni <alexandre.belloni@...e-electrons.com>
To:	Nicolas Ferre <nicolas.ferre@...el.com>
Cc:	Boris Brezillon <boris.brezillon@...e-electrons.com>,
	Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Lee Jones <lee.jones@...aro.org>,
	Wim Van Sebroeck <wim@...ana.be>,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-watchdog@...r.kernel.org,
	Alexandre Belloni <alexandre.belloni@...e-electrons.com>
Subject: [PATCH 5/8] ARM: at91: move the restart function to the system timer driver

Restarting on an at91rm9200 is handled by using the system timer. Move that
function to the system timer driver.

Signed-off-by: Alexandre Belloni <alexandre.belloni@...e-electrons.com>
---
 arch/arm/mach-at91/at91rm9200.c      | 11 -----------
 drivers/clocksource/timer-atmel-st.c | 12 ++++++++++++
 2 files changed, 12 insertions(+), 11 deletions(-)

diff --git a/arch/arm/mach-at91/at91rm9200.c b/arch/arm/mach-at91/at91rm9200.c
index b52916947535..4ea889cd6091 100644
--- a/arch/arm/mach-at91/at91rm9200.c
+++ b/arch/arm/mach-at91/at91rm9200.c
@@ -15,7 +15,6 @@
 
 #include <asm/mach/map.h>
 #include <asm/system_misc.h>
-#include <mach/at91_st.h>
 #include <mach/hardware.h>
 
 #include "soc.h"
@@ -30,15 +29,6 @@ static void at91rm9200_idle(void)
 	at91_pmc_write(AT91_PMC_SCDR, AT91_PMC_PCK);
 }
 
-static void at91rm9200_restart(enum reboot_mode reboot_mode, const char *cmd)
-{
-	/*
-	 * Perform a hardware reset with the use of the Watchdog timer.
-	 */
-	at91_st_write(AT91_ST_WDMR, AT91_ST_RSTEN | AT91_ST_EXTEN | 1);
-	at91_st_write(AT91_ST_CR, AT91_ST_WDRST);
-}
-
 /* --------------------------------------------------------------------
  *  AT91RM9200 processor initialization
  * -------------------------------------------------------------------- */
@@ -51,7 +41,6 @@ static void __init at91rm9200_map_io(void)
 static void __init at91rm9200_initialize(void)
 {
 	arm_pm_idle = at91rm9200_idle;
-	arm_pm_restart = at91rm9200_restart;
 }
 
 
diff --git a/drivers/clocksource/timer-atmel-st.c b/drivers/clocksource/timer-atmel-st.c
index 51761f8927b7..522583d6cc78 100644
--- a/drivers/clocksource/timer-atmel-st.c
+++ b/drivers/clocksource/timer-atmel-st.c
@@ -29,6 +29,7 @@
 #include <linux/of_irq.h>
 
 #include <asm/mach/time.h>
+#include <asm/system_misc.h>
 
 #include <mach/at91_st.h>
 #include <mach/hardware.h>
@@ -180,6 +181,15 @@ static struct clock_event_device clkevt = {
 	.set_mode	= clkevt32k_mode,
 };
 
+static void at91rm9200_restart(enum reboot_mode reboot_mode, const char *cmd)
+{
+	/*
+	 * Perform a hardware reset with the use of the Watchdog timer.
+	 */
+	at91_st_write(AT91_ST_WDMR, AT91_ST_RSTEN | AT91_ST_EXTEN | 1);
+	at91_st_write(AT91_ST_CR, AT91_ST_WDRST);
+}
+
 void __iomem *at91_st_base;
 EXPORT_SYMBOL_GPL(at91_st_base);
 
@@ -248,4 +258,6 @@ void __init at91rm9200_timer_init(void)
 
 	/* register clocksource */
 	clocksource_register_hz(&clk32k, AT91_SLOW_CLOCK);
+
+	arm_pm_restart = at91rm9200_restart;
 }
-- 
2.1.0

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