drivers/power/sy8106a.c

   1 /*
   2  * (C) Copyright 2016
   3  * Jelle van der Waa <jelle@vdwaa.nl>
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7 #include <common.h>
   8 #include <i2c.h>
   9 #include <sy8106a.h>
  10
  11 #define SY8106A_I2C_ADDR 0x65
  12 #define SY8106A_VOUT1_SEL 1
  13 #define SY8106A_VOUT1_SEL_ENABLE (1 << 7)
  14
  15 #ifdef CONFIG_SPL_BUILD
  16 static u8 sy8106a_mvolt_to_cfg(int mvolt, int min, int max, int div)
  17 {
  18         if (mvolt < min)
  19                 mvolt = min;
  20         else if (mvolt > max)
  21                 mvolt = max;
  22
  23         return (mvolt - min) / div;
  24 }
  25
  26 int sy8106a_set_vout1(unsigned int mvolt)
  27 {
  28         u8 data = sy8106a_mvolt_to_cfg(mvolt, 680, 1950, 10) | SY8106A_VOUT1_SEL_ENABLE;
  29         return i2c_write(SY8106A_I2C_ADDR, SY8106A_VOUT1_SEL, 1, &data, 1);
  30 }
  31 #endif