regulator: fixed: add suspend pm routines for pinctrl
PATCH v2 1/1 regulator: fixed: add suspend 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 <[email protected]>
---
Changes for v2:
- Fixed build error reported by Kbuild robot, the header file was not added.
drivers/regulator/fixed.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+)
drivers/regulator/fixed.c +22 -0
@@ -33,6 +33,7 @@#include <linux/acpi.h> #include <linux/property.h> #include <linux/gpio/consumer.h> +#include <linux/pinctrl/consumer.h> struct fixed_voltage_data {struct regulator_desc desc;
@@ -245,11 +246,32 @@ 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, }, };
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2.7.4