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Commit b3590040 authored by Subbaraman Narayanamurthy's avatar Subbaraman Narayanamurthy Committed by David Collins
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regulator: fan53555: add support to disable suspend voltage configuration 



Currently, fan53555 regulator driver always registers for
set_suspend_voltage. This force configures the regulator to
set suspend voltage switching to a different voltage selector.
However, this might not be preferred for certain applications.

Add a device tree parameter "fcs,disable-suspend" for the
regulator which when specified will disable suspend voltage
configuration.

CRs-Fixed: 968575
Change-Id: Ib9f450126482e606f3e057857b7a58800583519a
Signed-off-by: default avatarSubbaraman Narayanamurthy <subbaram@codeaurora.org>
parent 5da0024b

Documentation/devicetree/bindings/regulator/fan53555.txt

+5 −0
Original line number Diff line number Diff line
@@ -11,6 +11,10 @@ Optional properties: 
		voltage. The other one is used for the runtime voltage setting

		Possible values are either <0> or <1>

  - vin-supply: regulator supplying the vin pin

  - fcs,disable-suspend: Boolean flag which specifies if suspend voltage

		configuration should be avoided. If this property is present,

		then the voltage selector register defined by

		fcs,suspend-voltage-selector should not be modified at runtime.



Example:
@@ -29,4 +33,5 @@ Example: 
		regulator-min-microvolt = <600000>;

		regulator-max-microvolt = <1230000>;

		fcs,suspend-voltage-selector = <1>;

		fcs,disable-suspend;

	};

drivers/regulator/fan53555.c

+6 −0
Original line number Diff line number Diff line
@@ -99,6 +99,8 @@ struct fan53555_device_info { 
	unsigned int slew_rate;

	/* Sleep voltage cache */

	unsigned int sleep_vol_cache;

	/* Disable suspend */

	bool disable_suspend;

};



static int fan53555_set_suspend_voltage(struct regulator_dev *rdev, int uV)
@@ -106,6 +108,8 @@ static int fan53555_set_suspend_voltage(struct regulator_dev *rdev, int uV) 
	struct fan53555_device_info *di = rdev_get_drvdata(rdev);

	int ret;



	if (di->disable_suspend)

		return 0;

	if (di->sleep_vol_cache == uV)

		return 0;

	ret = regulator_map_voltage_linear(rdev, uV, uV);
@@ -368,6 +372,8 @@ static int fan53555_parse_dt(struct fan53555_device_info *di, 
	if (!ret)

		pdata->sleep_vsel_id = tmp;



	di->disable_suspend = of_property_read_bool(np, "fcs,disable-suspend");



	return ret;

}