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>

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,