From b8472d609f17a732017c41168c385904fdf46c97 Mon Sep 17 00:00:00 2001 From: Peter Chen Date: Thu, 22 Dec 2016 11:16:09 +0800 Subject: MLK-13638-4 regulator: fixed: add system pm routines for pinctrl At some systems, the pinctrl setting will be lost or needs to set as "sleep" state to save power consumption. So, we need to configure pinctrl as "sleep" state when system enters suspend, and as "default" state after system resumes. In this way, the pinctrl value can be recovered as "default" state after resuming. Signed-off-by: Peter Chen --- drivers/regulator/fixed.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) (limited to 'drivers/regulator') diff --git a/drivers/regulator/fixed.c b/drivers/regulator/fixed.c index 988a7472c2ab..27b6d75cb954 100644 --- a/drivers/regulator/fixed.c +++ b/drivers/regulator/fixed.c @@ -30,6 +30,7 @@ #include #include #include +#include struct fixed_voltage_data { struct regulator_desc desc; @@ -199,11 +200,32 @@ static const struct of_device_id fixed_of_match[] = { MODULE_DEVICE_TABLE(of, fixed_of_match); #endif +#ifdef CONFIG_PM_SLEEP +static int reg_fixed_voltage_suspend(struct device *dev) +{ + pinctrl_pm_select_sleep_state(dev); + + return 0; +} +static int reg_fixed_voltage_resume(struct device *dev) +{ + pinctrl_pm_select_default_state(dev); + + return 0; +} +#endif + +static const struct dev_pm_ops reg_fixed_voltage_pm_ops = { + SET_LATE_SYSTEM_SLEEP_PM_OPS(reg_fixed_voltage_suspend, + reg_fixed_voltage_resume) +}; + static struct platform_driver regulator_fixed_voltage_driver = { .probe = reg_fixed_voltage_probe, .driver = { .name = "reg-fixed-voltage", .of_match_table = of_match_ptr(fixed_of_match), + .pm = ®_fixed_voltage_pm_ops, }, }; -- cgit v1.2.3