drivers/power/pmic/sandbox.c

   1 /*
   2  *  Copyright (C) 2015 Samsung Electronics
   3  *  Przemyslaw Marczak  <p.marczak@samsung.com>
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <common.h>
   9 #include <fdtdec.h>
  10 #include <errno.h>
  11 #include <dm.h>
  12 #include <i2c.h>
  13 #include <power/pmic.h>
  14 #include <power/regulator.h>
  15 #include <power/sandbox_pmic.h>
  16
  17 static const struct pmic_child_info pmic_children_info[] = {
  18         { .prefix = SANDBOX_OF_LDO_PREFIX, .driver = SANDBOX_LDO_DRIVER },
  19         { .prefix = SANDBOX_OF_BUCK_PREFIX, .driver = SANDBOX_BUCK_DRIVER },
  20         { },
  21 };
  22
  23 static int sandbox_pmic_reg_count(struct udevice *dev)
  24 {
  25         return SANDBOX_PMIC_REG_COUNT;
  26 }
  27
  28 static int sandbox_pmic_write(struct udevice *dev, uint reg,
  29                               const uint8_t *buff, int len)
  30 {
  31         if (dm_i2c_write(dev, reg, buff, len)) {
  32                 pr_err("write error to device: %p register: %#x!", dev, reg);
  33                 return -EIO;
  34         }
  35
  36         return 0;
  37 }
  38
  39 static int sandbox_pmic_read(struct udevice *dev, uint reg,
  40                              uint8_t *buff, int len)
  41 {
  42         if (dm_i2c_read(dev, reg, buff, len)) {
  43                 pr_err("read error from device: %p register: %#x!", dev, reg);
  44                 return -EIO;
  45         }
  46
  47         return 0;
  48 }
  49
  50 static int sandbox_pmic_bind(struct udevice *dev)
  51 {
  52         if (!pmic_bind_children(dev, dev_ofnode(dev), pmic_children_info))
  53                 pr_err("%s:%d PMIC: %s - no child found!", __func__, __LINE__,
  54                                                           dev->name);
  55
  56         /* Always return success for this device - allows for PMIC I/O */
  57         return 0;
  58 }
  59
  60 static struct dm_pmic_ops sandbox_pmic_ops = {
  61         .reg_count = sandbox_pmic_reg_count,
  62         .read = sandbox_pmic_read,
  63         .write = sandbox_pmic_write,
  64 };
  65
  66 static const struct udevice_id sandbox_pmic_ids[] = {
  67         { .compatible = "sandbox,pmic" },
  68         { }
  69 };
  70
  71 U_BOOT_DRIVER(sandbox_pmic) = {
  72         .name = "sandbox_pmic",
  73         .id = UCLASS_PMIC,
  74         .of_match = sandbox_pmic_ids,
  75         .bind = sandbox_pmic_bind,
  76         .ops = &sandbox_pmic_ops,
  77 };