drivers/power/pmic/sandbox.c

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