1Binding for Samsung S5M8767 regulator block
2===========================================
3
4This is a part of device tree bindings for S5M family multi-function devices.
5More information can be found in bindings/mfd/sec-core.txt file.
6
7The S5M8767 device provide buck and LDO regulators.
8
9To register these with regulator framework instantiate under main device node
10a sub-node named "regulators" with more sub-nodes for each regulator using the
11common regulator binding documented in:
12 - Documentation/devicetree/bindings/regulator/regulator.txt
13
14
15Required properties of the main device node (the parent!):
16 - s5m8767,pmic-buck2-dvs-voltage: A set of 8 voltage values in micro-volt (uV)
17   units for buck2 when changing voltage using gpio dvs. Refer to [1] below
18   for additional information.
19
20 - s5m8767,pmic-buck3-dvs-voltage: A set of 8 voltage values in micro-volt (uV)
21   units for buck3 when changing voltage using gpio dvs. Refer to [1] below
22   for additional information.
23
24 - s5m8767,pmic-buck4-dvs-voltage: A set of 8 voltage values in micro-volt (uV)
25   units for buck4 when changing voltage using gpio dvs. Refer to [1] below
26   for additional information.
27
28 - s5m8767,pmic-buck-ds-gpios: GPIO specifiers for three host gpio's used
29   for selecting GPIO DVS lines. It is one-to-one mapped to dvs gpio lines.
30
31 [1] If none of the 's5m8767,pmic-buck[2/3/4]-uses-gpio-dvs' optional
32     property is specified, the 's5m8767,pmic-buck[2/3/4]-dvs-voltage'
33     property should specify atleast one voltage level (which would be a
34     safe operating voltage).
35
36     If either of the 's5m8767,pmic-buck[2/3/4]-uses-gpio-dvs' optional
37     property is specified, then all the eight voltage values for the
38     's5m8767,pmic-buck[2/3/4]-dvs-voltage' should be specified.
39
40Optional properties of the main device node (the parent!):
41 - s5m8767,pmic-buck2-uses-gpio-dvs: 'buck2' can be controlled by gpio dvs.
42 - s5m8767,pmic-buck3-uses-gpio-dvs: 'buck3' can be controlled by gpio dvs.
43 - s5m8767,pmic-buck4-uses-gpio-dvs: 'buck4' can be controlled by gpio dvs.
44
45Additional properties required if either of the optional properties are used:
46
47 - s5m8767,pmic-buck234-default-dvs-idx: Default voltage setting selected from
48   the possible 8 options selectable by the dvs gpios. The value of this
49   property should be between 0 and 7. If not specified or if out of range, the
50   default value of this property is set to 0.
51
52 - s5m8767,pmic-buck-dvs-gpios: GPIO specifiers for three host gpio's used
53   for dvs. The format of the gpio specifier depends in the gpio controller.
54
55
56Names of regulators supported by S5M8767 device:
57	- LDOn
58		  - valid values for n are 1 to 28
59		  - Example: LDO1, LDO2, LDO28
60	- BUCKn
61		  - valid values for n are 1 to 9.
62		  - Example: BUCK1, BUCK2, BUCK9
63Note: The 'n' in LDOn and BUCKn represents the LDO or BUCK number
64as per the datasheet of device.
65
66
67Optional properties of the nodes under "regulators" sub-node:
68 - op_mode: describes the different operating modes of the LDO's with
69            power mode change in SOC. The different possible values are,
70             0 - always off mode
71             1 - on in normal mode
72             2 - low power mode
73             3 - suspend mode
74 - s5m8767,pmic-ext-control-gpios: (optional) GPIO specifier for one
75                                   GPIO controlling this regulator
76                                   (enable/disable); This is valid only
77                                   for buck9.
78
79Example:
80
81	s5m8767_pmic@66 {
82		compatible = "samsung,s5m8767-pmic";
83		reg = <0x66>;
84
85		s5m8767,pmic-buck2-uses-gpio-dvs;
86		s5m8767,pmic-buck3-uses-gpio-dvs;
87		s5m8767,pmic-buck4-uses-gpio-dvs;
88
89		s5m8767,pmic-buck-default-dvs-idx = <0>;
90
91		s5m8767,pmic-buck-dvs-gpios = <&gpx0 0 0>, /* DVS1 */
92						 <&gpx0 1 0>, /* DVS2 */
93						 <&gpx0 2 0>; /* DVS3 */
94
95		s5m8767,pmic-buck-ds-gpios = <&gpx2 3 0>, /* SET1 */
96						<&gpx2 4 0>, /* SET2 */
97						<&gpx2 5 0>; /* SET3 */
98
99		s5m8767,pmic-buck2-dvs-voltage = <1350000>, <1300000>,
100						 <1250000>, <1200000>,
101						 <1150000>, <1100000>,
102						 <1000000>, <950000>;
103
104		s5m8767,pmic-buck3-dvs-voltage = <1100000>, <1100000>,
105						 <1100000>, <1100000>,
106						 <1000000>, <1000000>,
107						 <1000000>, <1000000>;
108
109		s5m8767,pmic-buck4-dvs-voltage = <1200000>, <1200000>,
110						 <1200000>, <1200000>,
111						 <1200000>, <1200000>,
112						 <1200000>, <1200000>;
113
114		regulators {
115			ldo1_reg: LDO1 {
116				regulator-name = "VDD_ABB_3.3V";
117				regulator-min-microvolt = <3300000>;
118				regulator-max-microvolt = <3300000>;
119				op_mode = <1>; /* Normal Mode */
120			};
121
122			ldo2_reg: LDO2 {
123				regulator-name = "VDD_ALIVE_1.1V";
124				regulator-min-microvolt = <1100000>;
125				regulator-max-microvolt = <1100000>;
126				regulator-always-on;
127			};
128
129			buck1_reg: BUCK1 {
130				regulator-name = "VDD_MIF_1.2V";
131				regulator-min-microvolt = <950000>;
132				regulator-max-microvolt = <1350000>;
133				regulator-always-on;
134				regulator-boot-on;
135			};
136
137			vemmc_reg: BUCK9 {
138				regulator-name = "VMEM_VDD_2.8V";
139				regulator-min-microvolt = <2800000>;
140				regulator-max-microvolt = <2800000>;
141				op_mode = <3>; /* Standby Mode */
142				s5m8767,pmic-ext-control-gpios = <&gpk0 2 0>;
143			};
144		};
145	};
146