mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-23 12:43:55 +08:00
f18ac1a3d7
It's LDO2, not LD02. Signed-off-by: Andreas Färber <afaerber@suse.de> Reviewed-by: Sachin Kamat <sachin.kamat@samsung.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
135 lines
4.4 KiB
Plaintext
135 lines
4.4 KiB
Plaintext
|
|
* Samsung S2MPS11 and S2MPS14 Voltage and Current Regulator
|
|
|
|
The Samsung S2MPS11 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 an I2C interface. Each sub-block is
|
|
addressed by the host system using different I2C slave addresses.
|
|
|
|
Required properties:
|
|
- compatible: Should be "samsung,s2mps11-pmic" or "samsung,s2mps14-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:
|
|
- clocks: s2mps11 and s5m8767 provide three(AP/CP/BT) buffered 32.768 KHz
|
|
outputs, so to register these as clocks with common clock framework
|
|
instantiate a sub-node named "clocks". It uses the common clock binding
|
|
documented in :
|
|
[Documentation/devicetree/bindings/clock/clock-bindings.txt]
|
|
The s2mps14 provides two (AP/BT) buffered 32.768 KHz outputs.
|
|
- #clock-cells: should be 1.
|
|
|
|
- The following is the list of clocks generated by the controller. Each clock
|
|
is assigned an identifier and client nodes use this identifier to specify
|
|
the clock which they consume.
|
|
Clock ID Devices
|
|
----------------------------------------------------------
|
|
32KhzAP 0 S2MPS11, S2MPS14, S5M8767
|
|
32KhzCP 1 S2MPS11, S5M8767
|
|
32KhzBT 2 S2MPS11, S2MPS14, S5M8767
|
|
|
|
- compatible: Should be one of: "samsung,s2mps11-clk", "samsung,s2mps14-clk",
|
|
"samsung,s5m8767-clk"
|
|
|
|
- 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 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[3, 4], and BUCK[7, 8, 10]
|
|
|
|
On S2MPS14 the LDO10, LDO11 and LDO12 can be configured to external control
|
|
over GPIO. To turn this feature on this property must be added to the regulator
|
|
sub-node:
|
|
- samsung,ext-control-gpios: GPIO specifier for one GPIO
|
|
controlling this regulator (enable/disable);
|
|
Example:
|
|
LDO12 {
|
|
regulator-name = "V_EMMC_2.8V";
|
|
regulator-min-microvolt = <2800000>;
|
|
regulator-max-microvolt = <2800000>;
|
|
samsung,ext-control-gpios = <&gpk0 2 0>;
|
|
};
|
|
|
|
|
|
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:
|
|
- S2MPS11: 1 to 38
|
|
- S2MPS14: 1 to 25
|
|
- Example: LDO1, LDO2, LDO28
|
|
- BUCKn
|
|
- valid values for n are:
|
|
- S2MPS11: 1 to 10
|
|
- S2MPS14: 1 to 5
|
|
- Example: BUCK1, BUCK2, BUCK9
|
|
|
|
Example:
|
|
|
|
s2mps11_pmic@66 {
|
|
compatible = "samsung,s2mps11-pmic";
|
|
reg = <0x66>;
|
|
|
|
s2m_osc: clocks {
|
|
compatible = "samsung,s2mps11-clk";
|
|
#clock-cells = <1>;
|
|
clock-output-names = "xx", "yy", "zz";
|
|
};
|
|
|
|
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>;
|
|
};
|
|
};
|
|
};
|