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Diffstat (limited to 'arch/arm/mach-sunxi/sunxi.c')
-rw-r--r--arch/arm/mach-sunxi/sunxi.c84
1 files changed, 64 insertions, 20 deletions
diff --git a/arch/arm/mach-sunxi/sunxi.c b/arch/arm/mach-sunxi/sunxi.c
index 38a3c55527c8..61d3a387f01c 100644
--- a/arch/arm/mach-sunxi/sunxi.c
+++ b/arch/arm/mach-sunxi/sunxi.c
@@ -10,7 +10,6 @@
* warranty of any kind, whether express or implied.
*/
-#include <linux/clocksource.h>
#include <linux/delay.h>
#include <linux/kernel.h>
#include <linux/init.h>
@@ -20,17 +19,24 @@
#include <linux/io.h>
#include <linux/reboot.h>
-#include <linux/clk/sunxi.h>
-
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/system_misc.h>
#define SUN4I_WATCHDOG_CTRL_REG 0x00
-#define SUN4I_WATCHDOG_CTRL_RESTART (1 << 0)
+#define SUN4I_WATCHDOG_CTRL_RESTART BIT(0)
#define SUN4I_WATCHDOG_MODE_REG 0x04
-#define SUN4I_WATCHDOG_MODE_ENABLE (1 << 0)
-#define SUN4I_WATCHDOG_MODE_RESET_ENABLE (1 << 1)
+#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;
@@ -56,14 +62,41 @@ static void sun4i_restart(enum reboot_mode mode, const char *cmd)
}
}
+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-wdt", .data = sun4i_restart },
+ { .compatible = "allwinner,sun4i-wdt" },
+ { .compatible = "allwinner,sun6i-wdt" },
{ /*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);
@@ -72,17 +105,6 @@ static void sunxi_setup_restart(void)
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 void __init sunxi_timer_init(void)
-{
- sunxi_init_clocks();
- clocksource_of_init();
}
static void __init sunxi_dt_init(void)
@@ -101,6 +123,28 @@ static const char * const sunxi_board_dt_compat[] = {
DT_MACHINE_START(SUNXI_DT, "Allwinner A1X (Device Tree)")
.init_machine = sunxi_dt_init,
- .init_time = sunxi_timer_init,
.dt_compat = sunxi_board_dt_compat,
+ .restart = sun4i_restart,
+MACHINE_END
+
+static const char * const sun6i_board_dt_compat[] = {
+ "allwinner,sun6i-a31",
+ NULL,
+};
+
+DT_MACHINE_START(SUN6I_DT, "Allwinner sun6i (A31) Family")
+ .init_machine = sunxi_dt_init,
+ .dt_compat = sun6i_board_dt_compat,
+ .restart = sun6i_restart,
+MACHINE_END
+
+static const char * const sun7i_board_dt_compat[] = {
+ "allwinner,sun7i-a20",
+ NULL,
+};
+
+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