Add bindings for ROHM BD9576MUF and BD9573MUF PMICs. These PMICs are primarily intended to be used to power the R-Car series processors. They provide 6 power outputs, safety features and a watchdog with two functional modes. Signed-off-by: Matti Vaittinen <matti.vaittinen@xxxxxxxxxxxxxxxxx> --- .../bindings/mfd/rohm,bd9576-pmic.yaml | 129 ++++++++++++++++++ 1 file changed, 129 insertions(+) create mode 100644 Documentation/devicetree/bindings/mfd/rohm,bd9576-pmic.yaml diff --git a/Documentation/devicetree/bindings/mfd/rohm,bd9576-pmic.yaml b/Documentation/devicetree/bindings/mfd/rohm,bd9576-pmic.yaml new file mode 100644 index 000000000000..f17d4d621585 --- /dev/null +++ b/Documentation/devicetree/bindings/mfd/rohm,bd9576-pmic.yaml @@ -0,0 +1,129 @@ +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/mfd/rohm,bd9576-pmic.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: ROHM BD9576MUF and BD9573MUF Power Management Integrated Circuit bindings + +maintainers: + - Matti Vaittinen <matti.vaittinen@xxxxxxxxxxxxxxxxx> + +description: | + BD9576MUF and BD9573MUF are power management ICs primarily intended for + powering the R-Car series processors. + The IC provides 6 power outputs with configurable sequencing and safety + monitoring. A watchdog logic with slow ping/windowed modes is also included. + +properties: + compatible: + enum: + - rohm,bd9576 + - rohm,bd9573 + + reg: + description: + I2C slave address. + maxItems: 1 + + interrupts: + maxItems: 1 + + rohm,vout1-en-low: + description: + BD9576 and BD9573 VOUT1 regulator enable state can be individually + controlled by a GPIO. This is dictated by state of vout1-en pin during + the PMIC startup. If vout1-en is LOW during PMIC startup then the VOUT1 + enable sate is controlled via this pin. Set this property if vout1-en + is wired to be down at PMIC start-up. + type: boolean + + rohm,vout1-en-gpios: + description: + GPIO specifier to specify the GPIO connected to vout1-en for vout1 ON/OFF + state control. + maxItems: 1 + + rohm,ddr-sel-low: + description: + The BD9576 and BD9573 output voltage for DDR can be selected by setting + the ddr-sel pin low or high. Set this property if ddr-sel is grounded. + type: boolean + + rohm,watchdog-enable-gpios: + description: The GPIO line used to enable the watchdog. + maxItems: 1 + + rohm,watchdog-ping-gpios: + description: The GPIO line used to ping the watchdog. + maxItems: 1 + + hw_margin_ms: + minimum: 4 + maximum: 4416 + description: Watchog timeout in milliseconds + + rohm,hw-margin-min-ms: + minimum: 2 + maximum: 220 + description: + Watchdog on these ICs can be configured in a window mode where the ping + must come within certain time-window. Eg. too quick pinging will also + trigger timeout. Specify the minimum delay between pings if you wish to + use the window mode. Note, the maximum delay is internally configured as + a certain multiple of this value so maximum delay can be only up to 15 + times this value. For example for 73 ms short ping value the maximum + timeout will be close to 1 sec. + + regulators: + $ref: ../regulator/rohm,bd9576-regulator.yaml + description: + List of child nodes that specify the regulators. + +required: + - compatible + - reg + - regulators + +additionalProperties: false + +examples: + - | + #include <dt-bindings/gpio/gpio.h> + #include <dt-bindings/leds/common.h> + i2c { + #address-cells = <1>; + #size-cells = <0>; + pmic: pmic@30 { + compatible = "rohm,bd9576"; + reg = <0x30>; + rohm,vout1-en-low; + rohm,vout1-en-gpios = <&gpio2 6 GPIO_ACTIVE_HIGH>; + rohm,ddr-sel-low; + rohm,watchdog-enable-gpios = <&gpio2 6 GPIO_ACTIVE_HIGH>; + rohm,watchdog-ping-gpios = <&gpio2 7 GPIO_ACTIVE_HIGH>; + hw_margin_ms = <30>; + rohm,hw-margin-min-ms = <4>; + + regulators { + boost1: regulator-vd50 { + regulator-name = "VD50"; + }; + buck1: regulator-vd18 { + regulator-name = "VD18"; + }; + buck2: regulator-vdddr { + regulator-name = "vdddr"; + }; + buck3: regulator-vd10 { + regulator-name = "vd10"; + }; + ldo: regulator-voutl1 { + regulator-name = "VOUTL1"; + }; + sw: regulator-vouts1 { + regulator-name = "VOUTS1"; + }; + }; + }; + }; -- 2.21.0 -- Matti Vaittinen, Linux device drivers ROHM Semiconductors, Finland SWDC Kiviharjunlenkki 1E 90220 OULU FINLAND ~~~ "I don't think so," said Rene Descartes. Just then he vanished ~~~ Simon says - in Latin please. ~~~ "non cogito me" dixit Rene Descarte, deinde evanescavit ~~~ Thanks to Simon Glass for the translation =]
