regulator: of: Add support for parsing regulator_state for suspend state

The regulation_constraints structure includes specific field to support
suspend state for global PMIC SUSPEND/HIBERNATE mode. This patch add support
for parsing regulator_state for suspend state.

Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/regulator/of_regulator.c b/drivers/regulator/of_regulator.c
index 7a51814abdc56b5dba53dfe8d9ea95108899d423..b375ffe40df1d272ef2106d283cc5af60657a661 100644 (file)
--- a/drivers/regulator/of_regulator.c
+++ b/drivers/regulator/of_regulator.c
@@ -19,12 +19,19 @@
 
 #include "internal.h"
 
+const char *const regulator_states[PM_SUSPEND_MAX + 1] = {
+       [PM_SUSPEND_MEM]        = "regulator-state-mem",
+       [PM_SUSPEND_MAX]        = "regulator-state-disk",
+};
+
 static void of_get_regulation_constraints(struct device_node *np,
                                        struct regulator_init_data **init_data)
 {
        const __be32 *min_uV, *max_uV;
        struct regulation_constraints *constraints = &(*init_data)->constraints;
-       int ret;
+       struct regulator_state *suspend_state;
+       struct device_node *suspend_np;
+       int ret, i;
        u32 pval;
 
        constraints->name = of_get_property(np, "regulator-name", NULL);
@@ -73,6 +80,36 @@ static void of_get_regulation_constraints(struct device_node *np,
        ret = of_property_read_u32(np, "regulator-enable-ramp-delay", &pval);
        if (!ret)
                constraints->enable_time = pval;
+
+       for (i = 0; i < ARRAY_SIZE(regulator_states); i++) {
+               switch (i) {
+               case PM_SUSPEND_MEM:
+                       suspend_state = &constraints->state_mem;
+                       break;
+               case PM_SUSPEND_MAX:
+                       suspend_state = &constraints->state_disk;
+                       break;
+               case PM_SUSPEND_ON:
+               case PM_SUSPEND_FREEZE:
+               case PM_SUSPEND_STANDBY:
+               default:
+                       continue;
+               };
+
+               suspend_np = of_get_child_by_name(np, regulator_states[i]);
+               if (!suspend_np || !suspend_state)
+                       continue;
+
+               if (of_property_read_bool(suspend_np,
+                                       "regulator-on-in-suspend"))
+                       suspend_state->enabled = true;
+               else if (of_property_read_bool(suspend_np,
+                                       "regulator-off-in-suspend"))
+                       suspend_state->disabled = true;
+
+               suspend_state = NULL;
+               suspend_np = NULL;
+       }
 }
 
 /**