drivers/power/pmic/stpmu1.c

   1 // SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
   2 /*
   3  * Copyright (C) 2018, STMicroelectronics - All Rights Reserved
   4  */
   5
   6 #include <common.h>
   7 #include <dm.h>
   8 #include <errno.h>
   9 #include <i2c.h>
  10 #include <power/pmic.h>
  11 #include <power/stpmu1.h>
  12
  13 #define STMPU1_NUM_OF_REGS 0x100
  14
  15 static int stpmu1_reg_count(struct udevice *dev)
  16 {
  17         return STMPU1_NUM_OF_REGS;
  18 }
  19
  20 static int stpmu1_write(struct udevice *dev, uint reg, const uint8_t *buff,
  21                         int len)
  22 {
  23         int ret;
  24
  25         ret = dm_i2c_write(dev, reg, buff, len);
  26         if (ret)
  27                 dev_err(dev, "%s: failed to write register %#x :%d",
  28                         __func__, reg, ret);
  29
  30         return ret;
  31 }
  32
  33 static int stpmu1_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
  34 {
  35         int ret;
  36
  37         ret = dm_i2c_read(dev, reg, buff, len);
  38         if (ret)
  39                 dev_err(dev, "%s: failed to read register %#x : %d",
  40                         __func__, reg, ret);
  41
  42         return ret;
  43 }
  44
  45 static struct dm_pmic_ops stpmu1_ops = {
  46         .reg_count = stpmu1_reg_count,
  47         .read = stpmu1_read,
  48         .write = stpmu1_write,
  49 };
  50
  51 static const struct udevice_id stpmu1_ids[] = {
  52         { .compatible = "st,stpmu1" },
  53         { }
  54 };
  55
  56 U_BOOT_DRIVER(pmic_stpmu1) = {
  57         .name = "stpmu1_pmic",
  58         .id = UCLASS_PMIC,
  59         .of_match = stpmu1_ids,
  60         .ops = &stpmu1_ops,
  61 };