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,bd71847-pmic.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: ROHM BD71847 and BD71850 Power Management Integrated Circuit
8
9 maintainers:
10 - Matti Vaittinen <mazziesaccount@gmail.com>
11
12 description: |
13 BD71847AMWV and BD71850MWV are programmable Power Management ICs for powering
14 single-core, dual-core, and quad-core SoCs such as NXP-i.MX 8M. It is
15 optimized for low BOM cost and compact solution footprint. BD71847MWV and
16 BD71850MWV integrate 6 Buck regulators and 6 LDOs.
17 Datasheets are available at
18 https://www.rohm.com/products/power-management/power-management-ic-for-system/industrial-consumer-applications/nxp-imx/bd71847amwv-product
19 https://www.rohm.com/products/power-management/power-management-ic-for-system/industrial-consumer-applications/nxp-imx/bd71850mwv-product
20
21 properties:
22 compatible:
23 enum:
24 - rohm,bd71847
25 - rohm,bd71850
26
27 reg:
28 description:
29 I2C slave address.
30 maxItems: 1
31
32 interrupts:
33 maxItems: 1
34
35 clocks:
36 maxItems: 1
37
38 "#clock-cells":
39 const: 0
40
41 clock-output-names:
42 maxItems: 1
43
44 # The BD71847 abd BD71850 support two different HW states as reset target
45 # states. States are called as SNVS and READY. At READY state all the PMIC
46 # power outputs go down and OTP is reload. At the SNVS state all other logic
47 # and external devices apart from the SNVS power domain are shut off. Please
48 # refer to NXP i.MX8 documentation for further information regarding SNVS
49 # state. When a reset is done via SNVS state the PMIC OTP data is not reload.
50 # This causes power outputs that have been under SW control to stay down when
51 # reset has switched power state to SNVS. If reset is done via READY state the
52 # power outputs will be returned to HW control by OTP loading. Thus the reset
53 # target state is set to READY by default. If SNVS state is used the boot
54 # crucial regulators must have the regulator-always-on and regulator-boot-on
55 # properties set in regulator node.
56
57 rohm,reset-snvs-powered:
58 description:
59 Transfer PMIC to SNVS state at reset.
60 type: boolean
61
62 # Configure the "short press" and "long press" timers for the power button.
63 # Values are rounded to what hardware supports
64 # Short-press:
65 # Shortest being 10ms, next 500ms and then multiple of 500ms up to 7,5s
66 # Long-press:
67 # Shortest being 10ms, next 1000ms and then multiple of 1000ms up to 15s
68 # If these properties are not present the existing # configuration (from
69 # bootloader or OTP) is not touched.
70
71 rohm,short-press-ms:
72 description:
73 Short press duration in milliseconds
74 enum:
75 - 10
76 - 500
77 - 1000
78 - 1500
79 - 2000
80 - 2500
81 - 3000
82 - 3500
83 - 4000
84 - 4500
85 - 5000
86 - 5500
87 - 6000
88 - 6500
89 - 7000
90 - 7500
91
92 rohm,long-press-ms:
93 description:
94 Long press duration in milliseconds
95 enum:
96 - 10
97 - 1000
98 - 2000
99 - 3000
100 - 4000
101 - 5000
102 - 6000
103 - 7000
104 - 8000
105 - 9000
106 - 10000
107 - 11000
108 - 12000
109 - 13000
110 - 14000
111 - 15000
112
113 regulators:
114 $ref: ../regulator/rohm,bd71847-regulator.yaml
115 description:
116 List of child nodes that specify the regulators.
117
118 required:
119 - compatible
120 - reg
121 - interrupts
122 - regulators
123
124 additionalProperties: false
125
126 dependencies:
127 '#clock-cells': [clocks]
128 clocks: ['#clock-cells']
129
130 examples:
131 - |
132 #include <dt-bindings/interrupt-controller/irq.h>
133
134 i2c {
135 #address-cells = <1>;
136 #size-cells = <0>;
137 pmic: pmic@4b {
138 compatible = "rohm,bd71847";
139 reg = <0x4b>;
140 interrupt-parent = <&gpio1>;
141 interrupts = <29 IRQ_TYPE_LEVEL_LOW>;
142 #clock-cells = <0>;
143 clocks = <&osc 0>;
144 rohm,reset-snvs-powered;
145 rohm,short-press-ms = <10>;
146 rohm,long-press-ms = <2000>;
147
148 regulators {
149 buck1: BUCK1 {
150 regulator-name = "buck1";
151 regulator-min-microvolt = <700000>;
152 regulator-max-microvolt = <1300000>;
153 regulator-boot-on;
154 regulator-always-on;
155 regulator-ramp-delay = <1250>;
156 rohm,dvs-run-voltage = <900000>;
157 rohm,dvs-idle-voltage = <850000>;
158 rohm,dvs-suspend-voltage = <800000>;
159 };
160 buck2: BUCK2 {
161 regulator-name = "buck2";
162 regulator-min-microvolt = <700000>;
163 regulator-max-microvolt = <1300000>;
164 regulator-boot-on;
165 regulator-always-on;
166 regulator-ramp-delay = <1250>;
167 rohm,dvs-run-voltage = <1000000>;
168 rohm,dvs-idle-voltage = <900000>;
169 };
170 buck3: BUCK3 {
171 regulator-name = "buck3";
172 regulator-min-microvolt = <550000>;
173 regulator-max-microvolt = <1350000>;
174 regulator-boot-on;
175 };
176 buck4: BUCK4 {
177 regulator-name = "buck4";
178 regulator-min-microvolt = <2600000>;
179 regulator-max-microvolt = <3300000>;
180 regulator-boot-on;
181 };
182 buck5: BUCK5 {
183 regulator-name = "buck5";
184 regulator-min-microvolt = <1605000>;
185 regulator-max-microvolt = <1995000>;
186 regulator-boot-on;
187 };
188 buck8: BUCK6 {
189 regulator-name = "buck6";
190 regulator-min-microvolt = <800000>;
191 regulator-max-microvolt = <1400000>;
192 };
193
194 ldo1: LDO1 {
195 regulator-name = "ldo1";
196 regulator-min-microvolt = <1600000>;
197 regulator-max-microvolt = <3300000>;
198 regulator-boot-on;
199 };
200 ldo2: LDO2 {
201 regulator-name = "ldo2";
202 regulator-min-microvolt = <800000>;
203 regulator-max-microvolt = <900000>;
204 regulator-boot-on;
205 };
206 ldo3: LDO3 {
207 regulator-name = "ldo3";
208 regulator-min-microvolt = <1800000>;
209 regulator-max-microvolt = <3300000>;
210 };
211 ldo4: LDO4 {
212 regulator-name = "ldo4";
213 regulator-min-microvolt = <900000>;
214 regulator-max-microvolt = <1800000>;
215 };
216 ldo5: LDO5 {
217 regulator-name = "ldo5";
218 regulator-min-microvolt = <800000>;
219 regulator-max-microvolt = <3300000>;
220 };
221 ldo6: LDO6 {
222 regulator-name = "ldo6";
223 regulator-min-microvolt = <900000>;
224 regulator-max-microvolt = <1800000>;
225 };
226 };
227 };
228 };
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