Messages in this thread Patch in this message | | | From | Vincent Palatin <> | Subject | [PATCH] regulator: read low power states configuration from device tree | Date | Thu, 25 Jul 2013 12:42:00 -0700 |
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The regulators state during a system wide low power state can currently only be described in platform data. Add the option to configure them from the device tree.
Signed-off-by: Vincent Palatin <vpalatin@chromium.org> --- .../devicetree/bindings/regulator/regulator.txt | 6 +++++ drivers/regulator/of_regulator.c | 31 ++++++++++++++++++++++ 2 files changed, 37 insertions(+)
diff --git a/Documentation/devicetree/bindings/regulator/regulator.txt b/Documentation/devicetree/bindings/regulator/regulator.txt index 48a3b8e..e259b43 100644 --- a/Documentation/devicetree/bindings/regulator/regulator.txt +++ b/Documentation/devicetree/bindings/regulator/regulator.txt @@ -10,6 +10,12 @@ Optional properties: - regulator-always-on: boolean, regulator should never be disabled - regulator-boot-on: bootloader/firmware enabled regulator - regulator-allow-bypass: allow the regulator to go into bypass mode +- regulator-suspend-disk-microvolt: voltage applied when entering S2D +- regulator-suspend-disk-disabled: turn off when entering S2D +- regulator-suspend-mem-microvolt: voltage applied when entering S2M +- regulator-suspend-mem-disabled: turn off when entering S2M +- regulator-suspend-standby-microvolt: voltage applied when entering standby +- regulator-suspend-standby-disabled: turn off when entering standby - <name>-supply: phandle to the parent supply/regulator node - regulator-ramp-delay: ramp delay for regulator(in uV/uS) diff --git a/drivers/regulator/of_regulator.c b/drivers/regulator/of_regulator.c index f3c8f8f..4abc18c 100644 --- a/drivers/regulator/of_regulator.c +++ b/drivers/regulator/of_regulator.c @@ -21,6 +21,7 @@ static void of_get_regulation_constraints(struct device_node *np, { const __be32 *min_uV, *max_uV, *uV_offset; const __be32 *min_uA, *max_uA, *ramp_delay; + const __be32 *state_disk_uV, *state_mem_uV, *state_standby_uV; struct regulation_constraints *constraints = &(*init_data)->constraints; constraints->name = of_get_property(np, "regulator-name", NULL); @@ -67,6 +68,36 @@ static void of_get_regulation_constraints(struct device_node *np, ramp_delay = of_get_property(np, "regulator-ramp-delay", NULL); if (ramp_delay) constraints->ramp_delay = be32_to_cpu(*ramp_delay); + + /* regulator state for suspend to disk */ + state_disk_uV = of_get_property(np, "regulator-suspend-disk-microvolt", + NULL); + if (state_disk_uV) { + constraints->state_disk.uV = be32_to_cpu(*state_disk_uV); + constraints->state_disk.enabled = true; + } + if (of_find_property(np, "regulator-suspend-disk-disabled", NULL)) + constraints->state_disk.disabled = true; + + /* regulator state for suspend to RAM */ + state_mem_uV = of_get_property(np, "regulator-suspend-mem-microvolt", + NULL); + if (state_mem_uV) { + constraints->state_mem.uV = be32_to_cpu(*state_mem_uV); + constraints->state_mem.enabled = true; + } + if (of_find_property(np, "regulator-suspend-mem-disabled", NULL)) + constraints->state_mem.disabled = true; + + /* regulator state for standby */ + state_standby_uV = of_get_property(np, + "regulator-suspend-standby-microvolt", NULL); + if (state_standby_uV) { + constraints->state_standby.uV = be32_to_cpu(*state_standby_uV); + constraints->state_standby.enabled = true; + } + if (of_find_property(np, "regulator-suspend-standby-disabled", NULL)) + constraints->state_standby.disabled = true; } /** -- 1.8.3
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