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c1516f840d
This patch adds device tree support for mfd driver and adds Documentation/devicetree/bindings/mfd/max77686.txt. This patch also intialize max77686 pointer to NULL in max77686_i2c_probe to silent a compile time warning. Signed-off-by: Yadwinder Singh Brar <yadi.brar@samsung.com> Reviwed-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
60 lines
1.9 KiB
Plaintext
60 lines
1.9 KiB
Plaintext
Maxim MAX77686 multi-function device
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MAX77686 is a Mulitifunction device with PMIC, RTC and Charger on chip. It is
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interfaced to host controller using i2c interface. PMIC and Charger submodules
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are addressed using same i2c slave address whereas RTC submodule uses
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different i2c slave address,presently for which we are statically creating i2c
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client while probing.This document describes the binding for mfd device and
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PMIC submodule.
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Required properties:
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- compatible : Must be "maxim,max77686";
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- reg : Specifies the i2c slave address of PMIC block.
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- interrupts : This i2c device has an IRQ line connected to the main SoC.
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- interrupt-parent : The parent interrupt controller.
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Optional node:
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- voltage-regulators : The regulators of max77686 have to be instantiated
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under subnode named "voltage-regulators" using the following format.
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regulator_name {
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regulator-compatible = LDOn/BUCKn
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standard regulator constraints....
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};
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refer Documentation/devicetree/bindings/regulator/regulator.txt
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The regulator-compatible property of regulator should initialized with string
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to get matched with their hardware counterparts as follow:
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-LDOn : for LDOs, where n can lie in range 1 to 26.
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example: LDO1, LDO2, LDO26.
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-BUCKn : for BUCKs, where n can lie in range 1 to 9.
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example: BUCK1, BUCK5, BUCK9.
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Example:
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max77686@09 {
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compatible = "maxim,max77686";
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interrupt-parent = <&wakeup_eint>;
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interrupts = <26 0>;
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reg = <0x09>;
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voltage-regulators {
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ldo11_reg {
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regulator-compatible = "LDO11";
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regulator-name = "vdd_ldo11";
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regulator-min-microvolt = <1900000>;
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regulator-max-microvolt = <1900000>;
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regulator-always-on;
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};
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buck1_reg {
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regulator-compatible = "BUCK1";
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regulator-name = "vdd_mif";
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regulator-min-microvolt = <950000>;
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regulator-max-microvolt = <1300000>;
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regulator-always-on;
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regulator-boot-on;
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};
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}
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