xref: /linux/Documentation/devicetree/bindings/mfd/rohm,bd9576-pmic.yaml (revision a4eb44a6435d6d8f9e642407a4a06f65eb90ca04) 
1# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/mfd/rohm,bd9576-pmic.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: ROHM BD9576MUF and BD9573MUF Power Management Integrated Circuit bindings
8
9maintainers:
10  - Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
11
12description: |
13  BD9576MUF and BD9573MUF are power management ICs primarily intended for
14  powering the R-Car series processors.
15  The IC provides 6 power outputs with configurable sequencing and safety
16  monitoring. A watchdog logic with slow ping/windowed modes is also included.
17
18properties:
19  compatible:
20    enum:
21      - rohm,bd9576
22      - rohm,bd9573
23
24  reg:
25    description:
26      I2C slave address.
27    maxItems: 1
28
29  interrupts:
30    maxItems: 1
31
32  rohm,vout1-en-low:
33    description:
34      BD9576 and BD9573 VOUT1 regulator enable state can be individually
35      controlled by a GPIO. This is dictated by state of vout1-en pin during
36      the PMIC startup. If vout1-en is LOW during PMIC startup then the VOUT1
37      enable sate is controlled via this pin. Set this property if vout1-en
38      is wired to be down at PMIC start-up.
39    type: boolean
40
41  rohm,vout1-en-gpios:
42    description:
43      GPIO specifier to specify the GPIO connected to vout1-en for vout1 ON/OFF
44      state control.
45    maxItems: 1
46
47  rohm,ddr-sel-low:
48    description:
49      The BD9576 and BD9573 output voltage for DDR can be selected by setting
50      the ddr-sel pin low or high. Set this property if ddr-sel is grounded.
51    type: boolean
52
53  rohm,watchdog-enable-gpios:
54    description: The GPIO line used to enable the watchdog.
55    maxItems: 1
56
57  rohm,watchdog-ping-gpios:
58    description: The GPIO line used to ping the watchdog.
59    maxItems: 1
60
61  rohm,hw-timeout-ms:
62    maxItems: 2
63    description:
64      Watchog timeout in milliseconds. If single value is given it is
65      the maximum timeout. Eg. if pinging watchdog is not done within this time
66      limit the watchdog will be triggered. If two values are given watchdog
67      is configured in "window mode". Then first value is limit for short-ping
68      Eg. if watchdog is pinged sooner than that the watchdog will trigger.
69      When two values is given the second value is the maximum timeout.
70      # (HW) minimum for short timeout is 2ms, maximum 220 ms.
71      # (HW) minimum for max timeout is 4ms, maximum 4416 ms.
72
73  regulators:
74    $ref: ../regulator/rohm,bd9576-regulator.yaml
75    description:
76      List of child nodes that specify the regulators.
77
78required:
79  - compatible
80  - reg
81  - regulators
82
83additionalProperties: false
84
85examples:
86  - |
87    #include <dt-bindings/gpio/gpio.h>
88    #include <dt-bindings/leds/common.h>
89    i2c {
90        #address-cells = <1>;
91        #size-cells = <0>;
92        pmic: pmic@30 {
93            compatible = "rohm,bd9576";
94            reg = <0x30>;
95            rohm,vout1-en-low;
96            rohm,vout1-en-gpios = <&gpio2 6 GPIO_ACTIVE_HIGH>;
97            rohm,ddr-sel-low;
98            rohm,watchdog-enable-gpios = <&gpio2 6 GPIO_ACTIVE_HIGH>;
99            rohm,watchdog-ping-gpios = <&gpio2 7 GPIO_ACTIVE_HIGH>;
100            rohm,hw-timeout-ms = <150>, <2300>;
101
102            regulators {
103                boost1: regulator-vd50 {
104                    regulator-name = "VD50";
105                };
106                buck1: regulator-vd18 {
107                    regulator-name = "VD18";
108                };
109                buck2: regulator-vdddr {
110                    regulator-name = "VDDDR";
111                };
112                buck3: regulator-vd10 {
113                    regulator-name = "VD10";
114                };
115                ldo: regulator-voutl1 {
116                    regulator-name = "VOUTL1";
117                };
118                sw: regulator-vouts1 {
119                    regulator-name = "VOUTS1";
120                };
121            };
122        };
123    };
124