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 these properties: 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 - s5m8767,pmic-ext-control-gpios: (optional) GPIO specifier for one 80 GPIO controlling this regulator (enable/disable); This is 81 valid only for buck9. 82 83The following are the names of the regulators that the s5m8767 pmic block 84supports. Note: The 'n' in LDOn and BUCKn represents the LDO or BUCK number 85as per the datasheet of s5m8767. 86 87 - LDOn 88 - valid values for n are 1 to 28 89 - Example: LDO1, LDO2, LDO28 90 - BUCKn 91 - valid values for n are 1 to 9. 92 - Example: BUCK1, BUCK2, BUCK9 93 94The bindings inside the regulator nodes use the standard regulator bindings 95which are documented elsewhere. 96 97Example: 98 99 s5m8767_pmic@66 { 100 compatible = "samsung,s5m8767-pmic"; 101 reg = <0x66>; 102 103 s5m8767,pmic-buck2-uses-gpio-dvs; 104 s5m8767,pmic-buck3-uses-gpio-dvs; 105 s5m8767,pmic-buck4-uses-gpio-dvs; 106 107 s5m8767,pmic-buck-default-dvs-idx = <0>; 108 109 s5m8767,pmic-buck-dvs-gpios = <&gpx0 0 0>, /* DVS1 */ 110 <&gpx0 1 0>, /* DVS2 */ 111 <&gpx0 2 0>; /* DVS3 */ 112 113 s5m8767,pmic-buck-ds-gpios = <&gpx2 3 0>, /* SET1 */ 114 <&gpx2 4 0>, /* SET2 */ 115 <&gpx2 5 0>; /* SET3 */ 116 117 s5m8767,pmic-buck2-dvs-voltage = <1350000>, <1300000>, 118 <1250000>, <1200000>, 119 <1150000>, <1100000>, 120 <1000000>, <950000>; 121 122 s5m8767,pmic-buck3-dvs-voltage = <1100000>, <1100000>, 123 <1100000>, <1100000>, 124 <1000000>, <1000000>, 125 <1000000>, <1000000>; 126 127 s5m8767,pmic-buck4-dvs-voltage = <1200000>, <1200000>, 128 <1200000>, <1200000>, 129 <1200000>, <1200000>, 130 <1200000>, <1200000>; 131 132 regulators { 133 ldo1_reg: LDO1 { 134 regulator-name = "VDD_ABB_3.3V"; 135 regulator-min-microvolt = <3300000>; 136 regulator-max-microvolt = <3300000>; 137 op_mode = <1>; /* Normal Mode */ 138 }; 139 140 ldo2_reg: LDO2 { 141 regulator-name = "VDD_ALIVE_1.1V"; 142 regulator-min-microvolt = <1100000>; 143 regulator-max-microvolt = <1100000>; 144 regulator-always-on; 145 }; 146 147 buck1_reg: BUCK1 { 148 regulator-name = "VDD_MIF_1.2V"; 149 regulator-min-microvolt = <950000>; 150 regulator-max-microvolt = <1350000>; 151 regulator-always-on; 152 regulator-boot-on; 153 }; 154 155 vemmc_reg: BUCK9 { 156 regulator-name = "VMEM_VDD_2.8V"; 157 regulator-min-microvolt = <2800000>; 158 regulator-max-microvolt = <2800000>; 159 op_mode = <3>; /* Standby Mode */ 160 s5m8767,pmic-ext-control-gpios = <&gpk0 2 0>; 161 }; 162 }; 163 }; 164