Bindings/regulator/lp872x.txt

   1 Binding for TI/National Semiconductor LP872x Driver
   2
   3 Required properties:
   4   - compatible: "ti,lp8720" or "ti,lp8725"
   5   - reg: I2C slave address. 0x7d = LP8720, 0x7a = LP8725
   6
   7 Optional properties:
   8   - ti,general-config: the value of LP872X_GENERAL_CFG register (u8)
   9     (LP8720)
  10     bit[2]: BUCK output voltage control by external DVS pin or register
  11             1 = external pin, 0 = bit7 of register 08h
  12     bit[1]: sleep control by external DVS pin or register
  13             1 = external pin, 0 = bit6 of register 08h
  14     bit[0]: time step unit(usec). 1 = 25, 0 = 50
  15
  16     (LP8725)
  17     bit[7:6]: time step unit(usec). 00 = 32, 01 = 64, 10 = 128, 11 = 256
  18     bit[4]:   BUCK2 enable control. 1 = enable, 0 = disable
  19     bit[3]:   BUCK2 output voltage register address. 1 = 0Ah, 0 = 0Bh
  20     bit[2]:   BUCK1 output voltage control by external DVS pin or register
  21               1 = register 08h, 0 = DVS
  22     bit[1]:   LDO sleep control. 1 = sleep mode, 0 = normal
  23     bit[0]:   BUCK1 enable control, 1 = enable, 0 = disable
  24
  25     For more details, please see the datasheet.
  26
  27   - ti,update-config: define it when LP872X_GENERAL_CFG register should be set
  28   - ti,dvs-gpio: GPIO specifier for external DVS pin control of LP872x devices.
  29   - ti,dvs-vsel: DVS selector. 0 = SEL_V1, 1 = SEL_V2.
  30   - ti,dvs-state: initial DVS pin state. 0 = DVS_LOW, 1 = DVS_HIGH.
  31   - enable-gpios: GPIO specifier for EN pin control of LP872x devices.
  32
  33   Sub nodes for regulator_init_data
  34     LP8720 has maximum 6 nodes. (child name: ldo1 ~ 5 and buck)
  35     LP8725 has maximum 9 nodes. (child name: ldo1 ~ 5, lilo1,2 and buck1,2)
  36     For more details, please see the following binding document.
  37     (Documentation/devicetree/bindings/regulator/regulator.txt)
  38
  39 Datasheet
  40   - LP8720: https://www.ti.com/lit/ds/symlink/lp8720.pdf
  41   - LP8725: https://www.ti.com/lit/ds/symlink/lp8725.pdf
  42
  43 Example 1) LP8720
  44
  45 lp8720@7d {
  46         compatible = "ti,lp8720";
  47         reg = <0x7d>;
  48
  49         /* external DVS pin used, timestep is 25usec */
  50         ti,general-config = /bits/ 8 <0x03>;
  51         ti,update-config;
  52
  53         /*
  54          * The dvs-gpio depends on the processor environment.
  55          * For example, following GPIO specifier means GPIO134 in OMAP4.
  56          */
  57         ti,dvs-gpio = <&gpio5 6 0>;
  58         ti,dvs-vsel = /bits/ 8 <1>;             /* SEL_V2 */
  59         ti,dvs-state = /bits/ 8 <1>;            /* DVS_HIGH */
  60
  61         vaf: ldo1 {
  62                 regulator-min-microvolt = <1200000>;
  63                 regulator-max-microvolt = <3300000>;
  64         };
  65
  66         vmmc: ldo2 {
  67                 regulator-min-microvolt = <1200000>;
  68                 regulator-max-microvolt = <3300000>;
  69         };
  70
  71         vcam_io: ldo3 {
  72                 regulator-min-microvolt = <1200000>;
  73                 regulator-max-microvolt = <3300000>;
  74                 regulator-boot-on;
  75         };
  76
  77         vcam_core: ldo4 {
  78                 regulator-min-microvolt = <800000>;
  79                 regulator-max-microvolt = <2850000>;
  80                 regulator-boot-on;
  81         };
  82
  83         vcam: ldo5 {
  84                 regulator-min-microvolt = <1200000>;
  85                 regulator-max-microvolt = <3300000>;
  86         };
  87
  88         vcc: buck {
  89                 regulator-name = "VBUCK";
  90                 regulator-min-microvolt = <800000>;
  91                 regulator-max-microvolt = <2300000>;
  92         };
  93 };
  94
  95 Example 2) LP8725
  96
  97 lp8725@7a {
  98         compatible = "ti,lp8725";
  99         reg = <0x7a>;
 100
 101         /* Enable BUCK1,2, no DVS, normal LDO mode, timestep is 256usec */
 102         ti,general-config = /bits/ 8 <0xdd>;
 103         ti,update-config;
 104
 105         vcam_io: ldo1 {
 106                 regulator-min-microvolt = <1200000>;
 107                 regulator-max-microvolt = <3300000>;
 108         };
 109
 110         vcam_core: ldo2 {
 111                 regulator-min-microvolt = <1200000>;
 112                 regulator-max-microvolt = <3300000>;
 113         };
 114
 115         vcam: ldo3 {
 116                 regulator-min-microvolt = <1200000>;
 117                 regulator-max-microvolt = <3300000>;
 118         };
 119
 120         vcmmb_io: ldo4 {
 121                 regulator-min-microvolt = <1200000>;
 122                 regulator-max-microvolt = <3300000>;
 123                 regulator-boot-on;
 124         };
 125
 126         vcmmb_core: ldo5 {
 127                 regulator-min-microvolt = <1200000>;
 128                 regulator-max-microvolt = <3300000>;
 129                 regulator-boot-on;
 130         };
 131
 132         vaux1: lilo1 {
 133                 regulator-name = "VAUX1";
 134                 regulator-min-microvolt = <800000>;
 135                 regulator-max-microvolt = <3300000>;
 136         };
 137
 138         vaux2: lilo2 {
 139                 regulator-name = "VAUX2";
 140                 regulator-min-microvolt = <800000>;
 141                 regulator-max-microvolt = <3300000>;
 142         };
 143
 144         vcc1: buck1 {
 145                 regulator-name = "VBUCK1";
 146                 regulator-min-microvolt = <800000>;
 147                 regulator-max-microvolt = <3000000>;
 148                 regulator-min-microamp  = <460000>;
 149                 regulator-max-microamp  = <1370000>;
 150                 regulator-boot-on;
 151         };
 152
 153         vcc2: buck2 {
 154                 regulator-name = "VBUCK2";
 155                 regulator-min-microvolt = <800000>;
 156                 regulator-max-microvolt = <3000000>;
 157                 regulator-min-microamp  = <460000>;
 158                 regulator-max-microamp  = <1370000>;
 159                 regulator-boot-on;
 160         };
 161 };