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authorLinus Walleij <linus.walleij@linaro.org>2014-12-19 16:56:27 +0100
committerSebastian Reichel <sre@kernel.org>2015-01-20 13:58:27 +0100
commit0160817d10a97900b9ee08a8b8b2f5a148e2be0f (patch)
tree5831737bfb20182e2d960b1337ef83453e8ae296 /drivers/power
parent06efe0e54018cb19cf0807447dc3ac747ffcfd1c (diff)
downloadlinux-0160817d10a97900b9ee08a8b8b2f5a148e2be0f.tar.bz2
power: reset: augment versatile driver for integrator
Augment the Versatile reset driver to also handle the core module reset sequence used on the Integrator/AP and Integrator/CP. Cc: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Sebastian Reichel <sre@kernel.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Sebastian Reichel <sre@kernel.org>
Diffstat (limited to 'drivers/power')
-rw-r--r--drivers/power/reset/arm-versatile-reboot.c32
1 files changed, 29 insertions, 3 deletions
diff --git a/drivers/power/reset/arm-versatile-reboot.c b/drivers/power/reset/arm-versatile-reboot.c
index 5b08bffcf1a8..adea9d0c38e0 100644
--- a/drivers/power/reset/arm-versatile-reboot.c
+++ b/drivers/power/reset/arm-versatile-reboot.c
@@ -15,14 +15,21 @@
#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 +43,10 @@ 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 +66,46 @@ 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)
{
/* 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,