The regulators would set different state/mode according to the kind of suspend
state. So regulation_constraints structure has already regulator suspend state
filed.
This patch parse regulator suspend state from devicetree file.
I tested this patch on Rinato board (Samsung Gear 2) included S2MPS14 PMIC.
- The power-consumption in suspend state is 0.6mA after applied this patchset.
For example:
ldoX_reg: LDOx {
regulator-name = "VAP_XXX_1.2V";
regulator-min-microvolt = <1200000>;
regulator-max-microvolt = <1200000>;
regulator-always-on;
regulator-state-mem {
regulator-off-in-suspend;
};
};
Changes from v4:
- Rebase this patchset on for-next branch of regulator.git
- Remove 'regulator-volt' property
- Remove 'regulator-initial-state' property
- Add example patch[1, patch3] based on Rinato board[2] included S2MPS14 PMIC.
S2MPS14 PMIC patch[3] has already implemented '.set_suspend_disable()' func
to change the regulator state to reduce power-consumption in suspend-state.
[1] ARM: dts: Add sleep mode of regulator for exynos3250-rinato board
[2] http://www.spinics.net/lists/linux-samsung-soc/msg37636.html
- [PATCHv2 0/2] ARM: dts: Add new board dts file for Exynos3250-based
Rinato board
- This patchset is not yet merged.
[3] regulator: s2mps11: Add set_suspend_disable for S2MPS14
(commid id: 05be09bb5ec8d12051515087a1983745dc93d906)
Changes from v3:
- Don't support 'regulator-state-standby' mode
- Remove 'regulator-mode' property
Changes from v2:
- Fix over 80 lines by using checkpatch script
- Rebase this patchset on latest for-next branch of regulator.git
Changes from v1:
- Check whether regulator-initial-state and regulator-mode is correct or not
- Add more detailed description about regulator-initial-state, regulator-mode
and regulator-state-[standby/mem/disk] for devicetree bindings
- Modify example of regulator suspend state in bindings documentation
Chanwoo Choi (3):
regulator: of: Add support for parsing regulator_state for suspend state
dt-bindings: regulator: Add regulator suspend state for PM state
ARM: dts: Add sleep mode of regulator for exynos3250-rinato board
.../devicetree/bindings/regulator/regulator.txt | 13 +++
arch/arm/boot/dts/exynos3250-rinato.dts | 108 +++++++++++++++++++++
drivers/regulator/of_regulator.c | 39 +++++++-
3 files changed, 159 insertions(+), 1 deletion(-)
--
1.8.0
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