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 DECLARE_GLOBAL_DATA_PTR;
  18
  19 static const struct pmic_child_info pmic_children_info[] = {
  20         { .prefix = SANDBOX_OF_LDO_PREFIX, .driver = SANDBOX_LDO_DRIVER },
  21         { .prefix = SANDBOX_OF_BUCK_PREFIX, .driver = SANDBOX_BUCK_DRIVER },
  22         { },
  23 };
  24
  25 static int sandbox_pmic_reg_count(struct udevice *dev)
  26 {
  27         return SANDBOX_PMIC_REG_COUNT;
  28 }
  29
  30 static int sandbox_pmic_write(struct udevice *dev, uint reg,
  31                               const uint8_t *buff, int len)
  32 {
  33         if (dm_i2c_write(dev, reg, buff, len)) {
  34                 error("write error to device: %p register: %#x!", dev, reg);
  35                 return -EIO;
  36         }
  37
  38         return 0;
  39 }
  40
  41 static int sandbox_pmic_read(struct udevice *dev, uint reg,
  42                              uint8_t *buff, int len)
  43 {
  44         if (dm_i2c_read(dev, reg, buff, len)) {
  45                 error("read error from device: %p register: %#x!", dev, reg);
  46                 return -EIO;
  47         }
  48
  49         return 0;
  50 }
  51
  52 static int sandbox_pmic_bind(struct udevice *dev)
  53 {
  54         if (!pmic_bind_children(dev, dev->of_offset, pmic_children_info))
  55                 error("%s:%d PMIC: %s - no child found!", __func__, __LINE__,
  56                                                           dev->name);
  57
  58         /* Always return success for this device - allows for PMIC I/O */
  59         return 0;
  60 }
  61
  62 static struct dm_pmic_ops sandbox_pmic_ops = {
  63         .reg_count = sandbox_pmic_reg_count,
  64         .read = sandbox_pmic_read,
  65         .write = sandbox_pmic_write,
  66 };
  67
  68 static const struct udevice_id sandbox_pmic_ids[] = {
  69         { .compatible = "sandbox,pmic" },
  70         { }
  71 };
  72
  73 U_BOOT_DRIVER(sandbox_pmic) = {
  74         .name = "sandbox_pmic",
  75         .id = UCLASS_PMIC,
  76         .of_match = sandbox_pmic_ids,
  77         .bind = sandbox_pmic_bind,
  78         .ops = &sandbox_pmic_ops,
  79 };