Commit aa32acad authored by Yadwinder Singh Brar's avatar Yadwinder Singh Brar Committed by Samuel Ortiz
Browse files

mfd: s2mps11: Add device tree support 



This patch adds DT compatible string for s2mps11 and binding documentation.

Reviewed-by: default avatarMark Brown <broonie@linaro.org>
Signed-off-by: default avatarYadwinder Singh Brar <yadi.brar@samsung.com>
Signed-off-by: default avatarLee Jones <lee.jones@linaro.org>
Signed-off-by: default avatarSamuel Ortiz <sameo@linux.intel.com>
parent 23e51e8e

Documentation/devicetree/bindings/mfd/s2mps11.txt

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* Samsung S2MPS11 Voltage and Current Regulator



The Samsung S2MP211 is a multi-function device which includes voltage and

current regulators, RTC, charger controller and other sub-blocks. It is

interfaced to the host controller using a I2C interface. Each sub-block is

addressed by the host system using different I2C slave address.



Required properties:

- compatible: Should be "samsung,s2mps11-pmic".

- reg: Specifies the I2C slave address of the pmic block. It should be 0x66.



Optional properties:

- interrupt-parent: Specifies the phandle of the interrupt controller to which

  the interrupts from s2mps11 are delivered to.

- interrupts: Interrupt specifiers for interrupt sources.



Optional nodes:

- regulators: The regulators of s2mps11 that have to be instantiated should be

included in a sub-node named 'regulators'. Regulator nodes included in this

sub-node should be of the format as listed below.



	regulator_name {

		[standard regulator constraints....];

	};



 regulator-ramp-delay for BUCKs = [6250/12500/25000(default)/50000] uV/us



 BUCK[2/3/4/6] supports disabling ramp delay on hardware, so explictly

 regulator-ramp-delay = <0> can be used for them to disable ramp delay.

 In absence of regulator-ramp-delay property, default ramp delay will be used.



NOTE: Some BUCKs share the ramp rate setting i.e. same ramp value will be set

for a particular group of BUCKs. So provide same regulator-ramp-delay<value>.

Grouping of BUCKs sharing ramp rate setting is as follow : BUCK[1, 6],

BUCK[3, 4], and BUCK[7, 8, 10]



The regulator constraints inside the regulator nodes use the standard regulator

bindings which are documented elsewhere.



The following are the names of the regulators that the s2mps11 pmic block

supports. Note: The 'n' in LDOn and BUCKn represents the LDO or BUCK number

as per the datasheet of s2mps11.



	- LDOn

		  - valid values for n are 1 to 28

		  - Example: LDO0, LD01, LDO28

	- BUCKn

		  - valid values for n are 1 to 9.

		  - Example: BUCK1, BUCK2, BUCK9



Example:



	s2mps11_pmic@66 {

		compatible = "samsung,s2mps11-pmic";

		reg = <0x66>;



		regulators {

			ldo1_reg: LDO1 {

				regulator-name = "VDD_ABB_3.3V";

				regulator-min-microvolt = <3300000>;

				regulator-max-microvolt = <3300000>;

			};



			ldo2_reg: LDO2 {

				regulator-name = "VDD_ALIVE_1.1V";

				regulator-min-microvolt = <1100000>;

				regulator-max-microvolt = <1100000>;

				regulator-always-on;

			};



			buck1_reg: BUCK1 {

				regulator-name = "vdd_mif";

				regulator-min-microvolt = <950000>;

				regulator-max-microvolt = <1350000>;

				regulator-always-on;

				regulator-boot-on;

			};



			buck2_reg: BUCK2 {

				regulator-name = "vdd_arm";

				regulator-min-microvolt = <950000>;

				regulator-max-microvolt = <1350000>;

				regulator-always-on;

				regulator-boot-on;

				regulator-ramp-delay = <50000>;

			};

		};

	};

drivers/mfd/sec-core.c

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@@ -69,6 +69,9 @@ static struct of_device_id sec_dt_match[] = { 
	{	.compatible = "samsung,s5m8767-pmic",

		.data = (void *)S5M8767X,

	},

	{	.compatible = "samsung,s2mps11-pmic",

		.data = (void *)S2MPS11X,

	},

	{},

};

#endif