On 9 January 2014 16:52, Sachin Kamat <sachin.kamat@xxxxxxxxxx> wrote:
> Added initial binding documentation for S2MPA01 MFD.
>
> Signed-off-by: Sachin Kamat <sachin.kamat@xxxxxxxxxx>
> ---
> * Re-organised as suggested by Mark Rutland.
> ---
> Documentation/devicetree/bindings/mfd/s2mpa01.txt | 86 +++++++++++++++++++++
> 1 file changed, 86 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/mfd/s2mpa01.txt
>
> diff --git a/Documentation/devicetree/bindings/mfd/s2mpa01.txt b/Documentation/devicetree/bindings/mfd/s2mpa01.txt
> new file mode 100644
> index 000000000000..70879b92b24b
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mfd/s2mpa01.txt
> @@ -0,0 +1,86 @@
> +
> +* Samsung S2MPA01 Voltage and Current Regulator
> +
> +The Samsung S2MPA01 is a multi-function device which includes high
> +efficiency buck converters including Dual-Phase buck converter, various LDOs,
> +and an RTC. It is interfaced to the host controller using an I2C interface.
> +Each sub-block is addressed by the host system using different I2C slave
> +addresses.
> +
> +Required properties:
> +- compatible: Should be "samsung,s2mpa01-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 s2mpa01 are delivered to.
> +- interrupts: Interrupt specifier for interrupt source (connected to SoC).
> +
> +Optional nodes:
> +- regulators: The regulators of s2mpa01 that have to be instantiated should be
> + included in a sub-node named 'regulators'. Regulator nodes and constraints
> + included in this sub-node use the standard regulator bindings which are
> + documented elsewhere.
> +
> +Properties for BUCK regulator nodes:
> + regulator-ramp-delay for BUCKs = [6250/12500(default)/25000/50000] uV/us
> +
> + BUCK[1/2/3/4] supports disabling ramp delay on hardware, so explictly
> + regulator-ramp-delay = <0> can be used for them to disable ramp delay.
> + In the absence of the regulator-ramp-delay property, the 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[2, 4], and BUCK[8, 9, 10]
> +
> +The following are the names of the regulators that the s2mpa01 PMIC block
> +supports. Note: The 'n' in LDOn and BUCKn represents the LDO or BUCK number
> +as per the datasheet of s2mpa01.
> +
> + - LDOn
> + - valid values for n are 1 to 26
> + - Example: LDO1, LD02, LDO26
> + - BUCKn
> + - valid values for n are 1 to 10.
> + - Example: BUCK1, BUCK2, BUCK9
> +
> +Example:
> +
> + s2mpa01_pmic@66 {
> + compatible = "samsung,s2mpa01-pmic";
> + reg = <0x66>;
> +
> + regulators {
> + ldo1_reg: LDO1 {
> + regulator-name = "VDD_ALIVE";
> + regulator-min-microvolt = <1000000>;
> + regulator-max-microvolt = <1000000>;
> + };
> +
> + ldo2_reg: LDO2 {
> + regulator-name = "VDDQ_MMC2";
> + regulator-min-microvolt = <2800000>;
> + regulator-max-microvolt = <2800000>;
> + 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>;
> + };
> + };
> + };
> --
> 1.7.9.5
>
Can I please have an ack from the DT maintainers so that this series
can be picked by Lee.
--
With warm regards,
Sachin
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