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>

diff --git a/drivers/power/reset/arm-versatile-reboot.c b/drivers/power/reset/arm-versatile-reboot.c
index 5b08bff..adea9d0 100644 (file)
--- 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,
@@ -35,6 +42,10 @@ static struct regmap *syscon_regmap;
 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,