提交 a13c7c51 编写于 作者: K Krzysztof Kozlowski 提交者: Lee Jones

dt-bindings: regulator/clock/mfd: Reorganize S2MPS-family bindings

Bindings for Samsung S2M and S5M family PMICs are in mess. They are
spread over different files and subdirectories in a non-consistent way.
The devices and respective drivers for them share a lot in common so
everything could be organized in a more readable way.

Reorganize the S2MPS11/13/14/15 Device Tree bindings to match the
drivers for this family of devices:
 - move mfd/s2mps11.txt to mfd/samsung,sec-core.txt for the main MFD
   driver (common for entire family),
 - split clock block to clock/samsung,s2mps11.txt,
 - split regulator block to regulator/samsung,s2mps11.txt.
Signed-off-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
Acked-by: NMichael Turquette <mturquette@baylibre.com>
Acked-by: NRob Herring <robh@kernel.org>
Acked-by: NMark Brown <broonie@kernel.org>
Signed-off-by: NLee Jones <lee.jones@linaro.org>
上级 f8e3a514
Binding for Samsung S2M and S5M family clock generator block
============================================================
This is a part of device tree bindings for S2M and S5M family multi-function
devices.
More information can be found in bindings/mfd/sec-core.txt file.
The S2MPS11/13/15 and S5M8767 provide three(AP/CP/BT) buffered 32.768 kHz
outputs. The S2MPS14 provides two (AP/BT) buffered 32.768 KHz outputs.
To register these as clocks with common clock framework instantiate under
main device node a sub-node named "clocks".
It uses the common clock binding documented in:
- Documentation/devicetree/bindings/clock/clock-bindings.txt
Required properties of the "clocks" sub-node:
- #clock-cells: should be 1.
- compatible: Should be one of: "samsung,s2mps11-clk", "samsung,s2mps13-clk",
"samsung,s2mps14-clk", "samsung,s5m8767-clk"
The S2MPS15 uses the same compatible as S2MPS13, as both provides similar
clocks.
Each clock is assigned an identifier and client nodes use this identifier
to specify the clock which they consume.
Clock ID Devices
----------------------------------------------------------
32KhzAP 0 S2MPS11/13/14/15, S5M8767
32KhzCP 1 S2MPS11/13/15, S5M8767
32KhzBT 2 S2MPS11/13/14/15, S5M8767
Include dt-bindings/clock/samsung,s2mps11.h file to use preprocessor defines
in device tree sources.
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";
};
};
* Samsung S2MPS11/13/14/15 and S2MPU02 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 one of the following
- "samsung,s2mps11-pmic"
- "samsung,s2mps13-pmic"
- "samsung,s2mps14-pmic"
- "samsung,s2mps15-pmic"
- "samsung,s2mpu02-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.
- samsung,s2mps11-wrstbi-ground: Indicates that WRSTBI pin of PMIC is pulled
down. When the system is suspended it will always go down thus triggerring
unwanted buck warm reset (setting buck voltages to default values).
- samsung,s2mps11-acokb-ground: Indicates that ACOKB pin of S2MPS11 PMIC is
connected to the ground so the PMIC must manually set PWRHOLD bit in CTRL1
register to turn off the power. Usually the ACOKB is pulled up to VBATT so
when PWRHOLD pin goes low, the rising ACOKB will trigger power off.
Optional nodes:
- clocks: s2mps11, s2mps13, s2mps15 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, S2MPS13, S2MPS14, S2MPS15, S5M8767
32KhzCP 1 S2MPS11, S2MPS13, S2MPS15, S5M8767
32KhzBT 2 S2MPS11, S2MPS13, S2MPS14, S2MPS15, S5M8767
- compatible: Should be one of: "samsung,s2mps11-clk", "samsung,s2mps13-clk",
"samsung,s2mps14-clk", "samsung,s5m8767-clk"
The s2msp15 uses the same compatible as s2mps13, as both provides similar clocks.
- 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 explicitly
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
- S2MPS13: 1 to 40
- S2MPS14: 1 to 25
- S2MPS15: 1 to 27
- S2MPU02: 1 to 28
- Example: LDO1, LDO2, LDO28
- BUCKn
- valid values for n are:
- S2MPS11: 1 to 10
- S2MPS13: 1 to 10
- S2MPS14: 1 to 5
- S2MPS15: 1 to 10
- S2MPU02: 1 to 7
- 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>;
};
};
};
Binding for Samsung S2M and S5M family multi-function device
============================================================
This is a part of device tree bindings for S2M and S5M family multi-function
devices.
The Samsung S2MPS11/13/14/15, S2MPU02 and S5M8767 is a family
of multi-function devices which include voltage and current regulators, RTC,
charger controller, clock outputs and other sub-blocks. It is interfaced
to the host controller using an I2C interface. Each sub-block is usually
addressed by the host system using different I2C slave addresses.
This document describes bindings for main device node. Optional sub-blocks
must be a sub-nodes to it. Bindings for them can be found in:
- bindings/regulator/samsung,s2mps11.txt
- bindings/clock/samsung,s2mps11.txt
Required properties:
- compatible: Should be one of the following
- "samsung,s2mps11-pmic",
- "samsung,s2mps13-pmic",
- "samsung,s2mps14-pmic",
- "samsung,s2mps15-pmic",
- "samsung,s2mpu02-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.
- samsung,s2mps11-wrstbi-ground: Indicates that WRSTBI pin of PMIC is pulled
down. When the system is suspended it will always go down thus triggerring
unwanted buck warm reset (setting buck voltages to default values).
- samsung,s2mps11-acokb-ground: Indicates that ACOKB pin of S2MPS11 PMIC is
connected to the ground so the PMIC must manually set PWRHOLD bit in CTRL1
register to turn off the power. Usually the ACOKB is pulled up to VBATT so
when PWRHOLD pin goes low, the rising ACOKB will trigger power off.
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>;
};
};
};
Binding for Samsung S2M family regulator block
==============================================
This is a part of device tree bindings for S2M family multi-function devices.
More information can be found in bindings/mfd/sec-core.txt file.
The S2MPS11/13/14/15 and S2MPU02 devices provide buck and LDO regulators.
To register these with regulator framework instantiate under main device node
a sub-node named "regulators" with more sub-nodes for each regulator using the
common regulator binding documented in:
- Documentation/devicetree/bindings/regulator/regulator.txt
Names of regulators supported by different devices:
- LDOn
- valid values for n are:
- S2MPS11: 1 to 38
- S2MPS13: 1 to 40
- S2MPS14: 1 to 25
- S2MPS15: 1 to 27
- S2MPU02: 1 to 28
- Example: LDO1, LDO2, LDO28
- BUCKn
- valid values for n are:
- S2MPS11: 1 to 10
- S2MPS13: 1 to 10
- S2MPS14: 1 to 5
- S2MPS15: 1 to 10
- S2MPU02: 1 to 7
- Example: BUCK1, BUCK2, BUCK9
Note: The 'n' in LDOn and BUCKn represents the LDO or BUCK number
as per the datasheet of device.
Optional properties of the nodes under "regulators" sub-node:
- regulator-ramp-delay: ramp delay in uV/us. May be 6250, 12500,
25000 (default) or 50000.
Additionally S2MPS11 supports disabling ramp delay for BUCK{2,3,4,6}
by setting it to <0>.
Note: On S2MPS11 some bucks share the ramp rate setting i.e. same ramp value
will be set for a particular group of bucks so provide the same
regulator-ramp-delay value for them.
Groups sharing ramp rate:
- buck{1,6},
- buck{3,4},
- buck{7,8,10}.
- samsung,ext-control-gpios: 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>;
};
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>;
};
};
};
......@@ -9224,7 +9224,9 @@ F: drivers/clk/clk-s2mps11.c
F: drivers/rtc/rtc-s5m.c
F: include/linux/mfd/samsung/
F: Documentation/devicetree/bindings/regulator/s5m8767-regulator.txt
F: Documentation/devicetree/bindings/mfd/s2mp*.txt
F: Documentation/devicetree/bindings/mfd/samsung,sec-core.txt
F: Documentation/devicetree/bindings/regulator/samsung,s2m*.txt
F: Documentation/devicetree/bindings/clock/samsung,s2mps11.txt
SAMSUNG S5P/EXYNOS4 SOC SERIES CAMERA SUBSYSTEM DRIVERS
M: Kyungmin Park <kyungmin.park@samsung.com>
......
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