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authorChunyan Zhang <zhang.chunyan@linaro.org>2018-01-26 21:08:47 +0800
committerMark Brown <broonie@kernel.org>2018-01-26 14:43:55 +0000
commitf7efad10b5c492892b1e5decf5d3ebb29fa5c9af (patch)
tree10ca83d0c4c018b03cdaf9a9597e3d75bf2e1a1c /drivers/regulator/of_regulator.c
parentaa27bbc6c6c60227c096d515f55ffe6cdfef7d2b (diff)
regulator: add PM suspend and resume hooks
In this patch, consumers are allowed to set suspend voltage, and this actually just set the "uV" in constraint::regulator_state, when the regulator_suspend_late() was called by PM core through callback when the system is entering into suspend, the regulator device would act suspend activity then. And it assumes that if any consumer set suspend voltage, the regulator device should be enabled in the suspend state. And if the suspend voltage of a regulator device for all consumers was set zero, the regulator device would be off in the suspend state. This patch also provides a new function hook to regulator devices for resuming from suspend states. Signed-off-by: Chunyan Zhang <zhang.chunyan@linaro.org> Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/regulator/of_regulator.c')
-rw-r--r--drivers/regulator/of_regulator.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/regulator/of_regulator.c b/drivers/regulator/of_regulator.c
index 41dad42b18f0..a09ef6cc2e9c 100644
--- a/drivers/regulator/of_regulator.c
+++ b/drivers/regulator/of_regulator.c
@@ -184,9 +184,23 @@ static void of_get_regulation_constraints(struct device_node *np,
else
suspend_state->enabled = DO_NOTHING_IN_SUSPEND;
+ if (!of_property_read_u32(np, "regulator-suspend-min-microvolt",
+ &pval))
+ suspend_state->min_uV = pval;
+
+ if (!of_property_read_u32(np, "regulator-suspend-max-microvolt",
+ &pval))
+ suspend_state->max_uV = pval;
+
if (!of_property_read_u32(suspend_np,
"regulator-suspend-microvolt", &pval))
suspend_state->uV = pval;
+ else /* otherwise use min_uV as default suspend voltage */
+ suspend_state->uV = suspend_state->min_uV;
+
+ if (of_property_read_bool(suspend_np,
+ "regulator-changeable-in-suspend"))
+ suspend_state->changeable = true;
if (i == PM_SUSPEND_MEM)
constraints->initial_state = PM_SUSPEND_MEM;