[PATCH v2 3/6] ARM: sunxi: Remove reset code from the platform

Maxime Ripard
2014-05-07T03:00:12Z

Now that reset is handled either by the watchdog driver for the sun4i, sun5i
and sun7i, and by a driver of its own for sun6i, we can remove it from the
platform code.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
---
arch/arm/mach-sunxi/sunxi.c | 98 ---------------------------------------------
1 file changed, 98 deletions(-)

diff --git a/arch/arm/mach-sunxi/sunxi.c b/arch/arm/mach-sunxi/sunxi.c
index 460b5a4962ef..1c62a0a021d7 100644
--- a/arch/arm/mach-sunxi/sunxi.c
+++ b/arch/arm/mach-sunxi/sunxi.c
@@ -12,109 +12,14 @@

#include <linux/clk-provider.h>
#include <linux/clocksource.h>
-#include <linux/delay.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/of_address.h>
-#include <linux/of_irq.h>
#include <linux/of_platform.h>
-#include <linux/io.h>
-#include <linux/reboot.h>

#include <asm/mach/arch.h>
-#include <asm/mach/map.h>
-#include <asm/system_misc.h>

#include "common.h"

-#define SUN4I_WATCHDOG_CTRL_REG 0x00
-#define SUN4I_WATCHDOG_CTRL_RESTART BIT(0)
-#define SUN4I_WATCHDOG_MODE_REG 0x04
-#define SUN4I_WATCHDOG_MODE_ENABLE BIT(0)
-#define SUN4I_WATCHDOG_MODE_RESET_ENABLE BIT(1)
-
-#define SUN6I_WATCHDOG1_IRQ_REG 0x00
-#define SUN6I_WATCHDOG1_CTRL_REG 0x10
-#define SUN6I_WATCHDOG1_CTRL_RESTART BIT(0)
-#define SUN6I_WATCHDOG1_CONFIG_REG 0x14
-#define SUN6I_WATCHDOG1_CONFIG_RESTART BIT(0)
-#define SUN6I_WATCHDOG1_CONFIG_IRQ BIT(1)
-#define SUN6I_WATCHDOG1_MODE_REG 0x18
-#define SUN6I_WATCHDOG1_MODE_ENABLE BIT(0)
-
-static void __iomem *wdt_base;
-
-static void sun4i_restart(enum reboot_mode mode, const char *cmd)
-{
- if (!wdt_base)
- return;
-
- /* Enable timer and set reset bit in the watchdog */
- writel(SUN4I_WATCHDOG_MODE_ENABLE | SUN4I_WATCHDOG_MODE_RESET_ENABLE,
- wdt_base + SUN4I_WATCHDOG_MODE_REG);
-
- /*
- * Restart the watchdog. The default (and lowest) interval
- * value for the watchdog is 0.5s.
- */
- writel(SUN4I_WATCHDOG_CTRL_RESTART, wdt_base + SUN4I_WATCHDOG_CTRL_REG);
-
- while (1) {
- mdelay(5);
- writel(SUN4I_WATCHDOG_MODE_ENABLE | SUN4I_WATCHDOG_MODE_RESET_ENABLE,
- wdt_base + SUN4I_WATCHDOG_MODE_REG);
- }
-}
-
-static void sun6i_restart(enum reboot_mode mode, const char *cmd)
-{
- if (!wdt_base)
- return;
-
- /* Disable interrupts */
- writel(0, wdt_base + SUN6I_WATCHDOG1_IRQ_REG);
-
- /* We want to disable the IRQ and just reset the whole system */
- writel(SUN6I_WATCHDOG1_CONFIG_RESTART,
- wdt_base + SUN6I_WATCHDOG1_CONFIG_REG);
-
- /* Enable timer. The default and lowest interval value is 0.5s */
- writel(SUN6I_WATCHDOG1_MODE_ENABLE,
- wdt_base + SUN6I_WATCHDOG1_MODE_REG);
-
- /* Restart the watchdog. */
- writel(SUN6I_WATCHDOG1_CTRL_RESTART,
- wdt_base + SUN6I_WATCHDOG1_CTRL_REG);
-
- while (1) {
- mdelay(5);
- writel(SUN6I_WATCHDOG1_MODE_ENABLE,
- wdt_base + SUN6I_WATCHDOG1_MODE_REG);
- }
-}
-
-static struct of_device_id sunxi_restart_ids[] = {
- { .compatible = "allwinner,sun4i-a10-wdt" },
- { .compatible = "allwinner,sun6i-a31-wdt" },
- { /*sentinel*/ }
-};
-
-static void sunxi_setup_restart(void)
-{
- struct device_node *np;
-
- np = of_find_matching_node(NULL, sunxi_restart_ids);
- if (WARN(!np, "unable to setup watchdog restart"))
- return;
-
- wdt_base = of_iomap(np, 0);
- WARN(!wdt_base, "failed to map watchdog base address");
-}
-
static void __init sunxi_dt_init(void)
{
- sunxi_setup_restart();
-
of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
}

@@ -128,7 +33,6 @@ static const char * const sunxi_board_dt_compat[] = {
DT_MACHINE_START(SUNXI_DT, "Allwinner A1X (Device Tree)")
.init_machine = sunxi_dt_init,
.dt_compat = sunxi_board_dt_compat,
- .restart = sun4i_restart,
MACHINE_END

static const char * const sun6i_board_dt_compat[] = {
@@ -148,7 +52,6 @@ DT_MACHINE_START(SUN6I_DT, "Allwinner sun6i (A31) Family")
.init_machine = sunxi_dt_init,
.init_time = sun6i_timer_init,
.dt_compat = sun6i_board_dt_compat,
- .restart = sun6i_restart,
.smp = smp_ops(sun6i_smp_ops),
MACHINE_END

@@ -160,5 +63,4 @@ static const char * const sun7i_board_dt_compat[] = {
DT_MACHINE_START(SUN7I_DT, "Allwinner sun7i (A20) Family")
.init_machine = sunxi_dt_init,
.dt_compat = sun7i_board_dt_compat,
- .restart = sun4i_restart,
MACHINE_END
--
1.9.1