1* Samsung S5M8767 Voltage and Current Regulator 2 3The Samsung S5M8767 is a multi-function device which includes voltage and 4current regulators, rtc, charger controller and other sub-blocks. It is 5interfaced to the host controller using a i2c interface. Each sub-block is 6addressed by the host system using different i2c slave address. This document 7describes the bindings for 'pmic' sub-block of s5m8767. 8 9Required properties: 10- compatible: Should be "samsung,s5m8767-pmic". 11- reg: Specifies the i2c slave address of the pmic block. It should be 0x66. 12 13- s5m8767,pmic-buck2-dvs-voltage: A set of 8 voltage values in micro-volt (uV) 14 units for buck2 when changing voltage using gpio dvs. Refer to [1] below 15 for additional information. 16 17- s5m8767,pmic-buck3-dvs-voltage: A set of 8 voltage values in micro-volt (uV) 18 units for buck3 when changing voltage using gpio dvs. Refer to [1] below 19 for additional information. 20 21- s5m8767,pmic-buck4-dvs-voltage: A set of 8 voltage values in micro-volt (uV) 22 units for buck4 when changing voltage using gpio dvs. Refer to [1] below 23 for additional information. 24 25- s5m8767,pmic-buck-ds-gpios: GPIO specifiers for three host gpio's used 26 for selecting GPIO DVS lines. It is one-to-one mapped to dvs gpio lines. 27 28[1] If none of the 's5m8767,pmic-buck[2/3/4]-uses-gpio-dvs' optional 29 property is specified, the 's5m8767,pmic-buck[2/3/4]-dvs-voltage' 30 property should specify atleast one voltage level (which would be a 31 safe operating voltage). 32 33 If either of the 's5m8767,pmic-buck[2/3/4]-uses-gpio-dvs' optional 34 property is specified, then all the eight voltage values for the 35 's5m8767,pmic-buck[2/3/4]-dvs-voltage' should be specified. 36 37Optional properties: 38- interrupt-parent: Specifies the phandle of the interrupt controller to which 39 the interrupts from s5m8767 are delivered to. 40- interrupts: Interrupt specifiers for two interrupt sources. 41 - First interrupt specifier is for 'irq1' interrupt. 42 - Second interrupt specifier is for 'alert' interrupt. 43- s5m8767,pmic-buck2-uses-gpio-dvs: 'buck2' can be controlled by gpio dvs. 44- s5m8767,pmic-buck3-uses-gpio-dvs: 'buck3' can be controlled by gpio dvs. 45- s5m8767,pmic-buck4-uses-gpio-dvs: 'buck4' can be controlled by gpio dvs. 46 47Additional properties required if either of the optional properties are used: 48 49- s5m8767,pmic-buck234-default-dvs-idx: Default voltage setting selected from 50 the possible 8 options selectable by the dvs gpios. The value of this 51 property should be between 0 and 7. If not specified or if out of range, the 52 default value of this property is set to 0. 53 54- s5m8767,pmic-buck-dvs-gpios: GPIO specifiers for three host gpio's used 55 for dvs. The format of the gpio specifier depends in the gpio controller. 56 57Regulators: The regulators of s5m8767 that have to be instantiated should be 58included in a sub-node named 'regulators'. Regulator nodes included in this 59sub-node should be of the format as listed below. 60 61 regulator_name { 62 ldo1_reg: LDO1 { 63 regulator-name = "VDD_ALIVE_1.0V"; 64 regulator-min-microvolt = <1100000>; 65 regulator-max-microvolt = <1100000>; 66 regulator-always-on; 67 regulator-boot-on; 68 op_mode = <1>; /* Normal Mode */ 69 }; 70 }; 71The above regulator entries are defined in regulator bindings documentation 72except op_mode description. 73 - op_mode: describes the different operating modes of the LDO's with 74 power mode change in SOC. The different possible values are, 75 0 - always off mode 76 1 - on in normal mode 77 2 - low power mode 78 3 - suspend mode 79 80The following are the names of the regulators that the s5m8767 pmic block 81supports. Note: The 'n' in LDOn and BUCKn represents the LDO or BUCK number 82as per the datasheet of s5m8767. 83 84 - LDOn 85 - valid values for n are 1 to 28 86 - Example: LDO0, LD01, LDO28 87 - BUCKn 88 - valid values for n are 1 to 9. 89 - Example: BUCK1, BUCK2, BUCK9 90 91The bindings inside the regulator nodes use the standard regulator bindings 92which are documented elsewhere. 93 94Example: 95 96 s5m8767_pmic@66 { 97 compatible = "samsung,s5m8767-pmic"; 98 reg = <0x66>; 99 100 s5m8767,pmic-buck2-uses-gpio-dvs; 101 s5m8767,pmic-buck3-uses-gpio-dvs; 102 s5m8767,pmic-buck4-uses-gpio-dvs; 103 104 s5m8767,pmic-buck-default-dvs-idx = <0>; 105 106 s5m8767,pmic-buck-dvs-gpios = <&gpx0 0 0>, /* DVS1 */ 107 <&gpx0 1 0>, /* DVS2 */ 108 <&gpx0 2 0>; /* DVS3 */ 109 110 s5m8767,pmic-buck-ds-gpios = <&gpx2 3 0>, /* SET1 */ 111 <&gpx2 4 0>, /* SET2 */ 112 <&gpx2 5 0>; /* SET3 */ 113 114 s5m8767,pmic-buck2-dvs-voltage = <1350000>, <1300000>, 115 <1250000>, <1200000>, 116 <1150000>, <1100000>, 117 <1000000>, <950000>; 118 119 s5m8767,pmic-buck3-dvs-voltage = <1100000>, <1100000>, 120 <1100000>, <1100000>, 121 <1000000>, <1000000>, 122 <1000000>, <1000000>; 123 124 s5m8767,pmic-buck4-dvs-voltage = <1200000>, <1200000>, 125 <1200000>, <1200000>, 126 <1200000>, <1200000>, 127 <1200000>, <1200000>; 128 129 regulators { 130 ldo1_reg: LDO1 { 131 regulator-name = "VDD_ABB_3.3V"; 132 regulator-min-microvolt = <3300000>; 133 regulator-max-microvolt = <3300000>; 134 op_mode = <1>; /* Normal Mode */ 135 }; 136 137 ldo2_reg: LDO2 { 138 regulator-name = "VDD_ALIVE_1.1V"; 139 regulator-min-microvolt = <1100000>; 140 regulator-max-microvolt = <1100000>; 141 regulator-always-on; 142 }; 143 144 buck1_reg: BUCK1 { 145 regulator-name = "VDD_MIF_1.2V"; 146 regulator-min-microvolt = <950000>; 147 regulator-max-microvolt = <1350000>; 148 regulator-always-on; 149 regulator-boot-on; 150 }; 151 }; 152 }; 153