diff options
| -rw-r--r-- | Documentation/devicetree/bindings/watchdog/sun4i-wdt.txt (renamed from Documentation/devicetree/bindings/watchdog/sunxi-wdt.txt) | 6 | ||||
| -rw-r--r-- | arch/arm/mach-sunxi/sunxi.c | 58 |
2 files changed, 38 insertions, 26 deletions
diff --git a/Documentation/devicetree/bindings/watchdog/sunxi-wdt.txt b/Documentation/devicetree/bindings/watchdog/sun4i-wdt.txt index 0b271777560..ecd650adff3 100644 --- a/Documentation/devicetree/bindings/watchdog/sunxi-wdt.txt +++ b/Documentation/devicetree/bindings/watchdog/sun4i-wdt.txt @@ -1,13 +1,13 @@ -Allwinner sunXi Watchdog timer +Allwinner sun4i Watchdog timer Required properties: -- compatible : should be "allwinner,sunxi-wdt" +- compatible : should be "allwinner,sun4i-wdt" - reg : Specifies base physical address and size of the registers. Example: wdt: watchdog@01c20c90 { - compatible = "allwinner,sunxi-wdt"; + compatible = "allwinner,sun4i-wdt"; reg = <0x01c20c90 0x10>; }; diff --git a/arch/arm/mach-sunxi/sunxi.c b/arch/arm/mach-sunxi/sunxi.c index c99ab1bdee4..706ce35396b 100644 --- a/arch/arm/mach-sunxi/sunxi.c +++ b/arch/arm/mach-sunxi/sunxi.c @@ -24,50 +24,63 @@ #include <asm/mach/arch.h> #include <asm/mach/map.h> +#include <asm/system_misc.h> #include "sunxi.h" -#define WATCHDOG_CTRL_REG 0x00 -#define WATCHDOG_CTRL_RESTART (1 << 0) -#define WATCHDOG_MODE_REG 0x04 -#define WATCHDOG_MODE_ENABLE (1 << 0) -#define WATCHDOG_MODE_RESET_ENABLE (1 << 1) +#define SUN4I_WATCHDOG_CTRL_REG 0x00 +#define SUN4I_WATCHDOG_CTRL_RESTART (1 << 0) +#define SUN4I_WATCHDOG_MODE_REG 0x04 +#define SUN4I_WATCHDOG_MODE_ENABLE (1 << 0) +#define SUN4I_WATCHDOG_MODE_RESET_ENABLE (1 << 1) static void __iomem *wdt_base; -static void sunxi_setup_restart(void) -{ - struct device_node *np = of_find_compatible_node(NULL, NULL, - "allwinner,sunxi-wdt"); - 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 sunxi_restart(char mode, const char *cmd) +static void sun4i_restart(char mode, const char *cmd) { if (!wdt_base) return; /* Enable timer and set reset bit in the watchdog */ - writel(WATCHDOG_MODE_ENABLE | WATCHDOG_MODE_RESET_ENABLE, - wdt_base + WATCHDOG_MODE_REG); + 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(WATCHDOG_CTRL_RESTART, wdt_base + WATCHDOG_CTRL_REG); + writel(SUN4I_WATCHDOG_CTRL_RESTART, wdt_base + SUN4I_WATCHDOG_CTRL_REG); while (1) { mdelay(5); - writel(WATCHDOG_MODE_ENABLE | WATCHDOG_MODE_RESET_ENABLE, - wdt_base + WATCHDOG_MODE_REG); + writel(SUN4I_WATCHDOG_MODE_ENABLE | SUN4I_WATCHDOG_MODE_RESET_ENABLE, + wdt_base + SUN4I_WATCHDOG_MODE_REG); } } +static struct of_device_id sunxi_restart_ids[] = { + { .compatible = "allwinner,sun4i-wdt", .data = sun4i_restart }, + { /*sentinel*/ } +}; + +static void sunxi_setup_restart(void) +{ + const struct of_device_id *of_id; + 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"); + + of_id = of_match_node(sunxi_restart_ids, np); + WARN(!of_id, "restart function not available"); + + arm_pm_restart = of_id->data; +} + static struct map_desc sunxi_io_desc[] __initdata = { { .virtual = (unsigned long) SUNXI_REGS_VIRT_BASE, @@ -105,7 +118,6 @@ DT_MACHINE_START(SUNXI_DT, "Allwinner A1X (Device Tree)") .init_machine = sunxi_dt_init, .map_io = sunxi_map_io, .init_irq = irqchip_init, - .restart = sunxi_restart, .init_time = sunxi_timer_init, .dt_compat = sunxi_board_dt_compat, MACHINE_END |