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path: root/drivers/power/reset/arm-versatile-reboot.c
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Diffstat (limited to 'drivers/power/reset/arm-versatile-reboot.c')
-rw-r--r--drivers/power/reset/arm-versatile-reboot.c49
1 files changed, 43 insertions, 6 deletions
diff --git a/drivers/power/reset/arm-versatile-reboot.c b/drivers/power/reset/arm-versatile-reboot.c
index 5b08bffcf1a8..b208073c887d 100644
--- a/drivers/power/reset/arm-versatile-reboot.c
+++ b/drivers/power/reset/arm-versatile-reboot.c
@@ -13,16 +13,22 @@
#include <linux/reboot.h>
#include <linux/regmap.h>
#include <linux/of.h>
-#include <asm/system_misc.h>
+
+#define INTEGRATOR_HDR_CTRL_OFFSET 0x0C
+#define INTEGRATOR_HDR_LOCK_OFFSET 0x14
+#define INTEGRATOR_CM_CTRL_RESET (1 << 3)
#define REALVIEW_SYS_LOCK_OFFSET 0x20
-#define REALVIEW_SYS_LOCK_VAL 0xA05F
#define REALVIEW_SYS_RESETCTL_OFFSET 0x40
+/* Magic unlocking token used on all Versatile boards */
+#define VERSATILE_LOCK_VAL 0xA05F
+
/*
* We detect the different syscon types from the compatible strings.
*/
enum versatile_reboot {
+ INTEGRATOR_REBOOT_CM,
REALVIEW_REBOOT_EB,
REALVIEW_REBOOT_PB1176,
REALVIEW_REBOOT_PB11MP,
@@ -36,6 +42,10 @@ static enum versatile_reboot versatile_reboot_type;
static const struct of_device_id versatile_reboot_of_match[] = {
{
+ .compatible = "arm,core-module-integrator",
+ .data = (void *)INTEGRATOR_REBOOT_CM
+ },
+ {
.compatible = "arm,realview-eb-syscon",
.data = (void *)REALVIEW_REBOOT_EB,
},
@@ -55,31 +65,47 @@ static const struct of_device_id versatile_reboot_of_match[] = {
.compatible = "arm,realview-pbx-syscon",
.data = (void *)REALVIEW_REBOOT_PBX,
},
+ {},
};
-static void versatile_reboot(enum reboot_mode mode, const char *cmd)
+static int versatile_reboot(struct notifier_block *this, unsigned long mode,
+ void *cmd)
{
/* Unlock the reset register */
- regmap_write(syscon_regmap, REALVIEW_SYS_LOCK_OFFSET,
- REALVIEW_SYS_LOCK_VAL);
/* Then hit reset on the different machines */
switch (versatile_reboot_type) {
+ case INTEGRATOR_REBOOT_CM:
+ regmap_write(syscon_regmap, INTEGRATOR_HDR_LOCK_OFFSET,
+ VERSATILE_LOCK_VAL);
+ regmap_update_bits(syscon_regmap,
+ INTEGRATOR_HDR_CTRL_OFFSET,
+ INTEGRATOR_CM_CTRL_RESET,
+ INTEGRATOR_CM_CTRL_RESET);
+ break;
case REALVIEW_REBOOT_EB:
+ regmap_write(syscon_regmap, REALVIEW_SYS_LOCK_OFFSET,
+ VERSATILE_LOCK_VAL);
regmap_write(syscon_regmap,
REALVIEW_SYS_RESETCTL_OFFSET, 0x0008);
break;
case REALVIEW_REBOOT_PB1176:
+ regmap_write(syscon_regmap, REALVIEW_SYS_LOCK_OFFSET,
+ VERSATILE_LOCK_VAL);
regmap_write(syscon_regmap,
REALVIEW_SYS_RESETCTL_OFFSET, 0x0100);
break;
case REALVIEW_REBOOT_PB11MP:
case REALVIEW_REBOOT_PBA8:
+ regmap_write(syscon_regmap, REALVIEW_SYS_LOCK_OFFSET,
+ VERSATILE_LOCK_VAL);
regmap_write(syscon_regmap, REALVIEW_SYS_RESETCTL_OFFSET,
0x0000);
regmap_write(syscon_regmap, REALVIEW_SYS_RESETCTL_OFFSET,
0x0004);
break;
case REALVIEW_REBOOT_PBX:
+ regmap_write(syscon_regmap, REALVIEW_SYS_LOCK_OFFSET,
+ VERSATILE_LOCK_VAL);
regmap_write(syscon_regmap, REALVIEW_SYS_RESETCTL_OFFSET,
0x00f0);
regmap_write(syscon_regmap, REALVIEW_SYS_RESETCTL_OFFSET,
@@ -87,12 +113,20 @@ static void versatile_reboot(enum reboot_mode mode, const char *cmd)
break;
}
dsb();
+
+ return NOTIFY_DONE;
}
+static struct notifier_block versatile_reboot_nb = {
+ .notifier_call = versatile_reboot,
+ .priority = 192,
+};
+
static int __init versatile_reboot_probe(void)
{
const struct of_device_id *reboot_id;
struct device_node *np;
+ int err;
np = of_find_matching_node_and_match(NULL, versatile_reboot_of_match,
&reboot_id);
@@ -104,7 +138,10 @@ static int __init versatile_reboot_probe(void)
if (IS_ERR(syscon_regmap))
return PTR_ERR(syscon_regmap);
- arm_pm_restart = versatile_reboot;
+ err = register_restart_handler(&versatile_reboot_nb);
+ if (err)
+ return err;
+
pr_info("versatile reboot driver registered\n");
return 0;
}