drivers/power/pmic/pfuze100.c

   1 /*
   2  * Copyright (C) 2015 Freescale Semiconductor, Inc
   3  * Peng Fan <Peng.Fan@freescale.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/pfuze100_pmic.h>
  16
  17 DECLARE_GLOBAL_DATA_PTR;
  18
  19 static const struct pmic_child_info pmic_children_info[] = {
  20         /* sw[x], swbst */
  21         { .prefix = "s", .driver = PFUZE100_REGULATOR_DRIVER },
  22         /* vgen[x], vsnvs, vcc, v33, vcc_sd */
  23         { .prefix = "v", .driver = PFUZE100_REGULATOR_DRIVER },
  24         { },
  25 };
  26
  27 static int pfuze100_reg_count(struct udevice *dev)
  28 {
  29         return PFUZE100_NUM_OF_REGS;
  30 }
  31
  32 static int pfuze100_write(struct udevice *dev, uint reg, const uint8_t *buff,
  33                           int len)
  34 {
  35         if (dm_i2c_write(dev, reg, buff, len)) {
  36                 error("write error to device: %p register: %#x!", dev, reg);
  37                 return -EIO;
  38         }
  39
  40         return 0;
  41 }
  42
  43 static int pfuze100_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
  44 {
  45         if (dm_i2c_read(dev, reg, buff, len)) {
  46                 error("read error from device: %p register: %#x!", dev, reg);
  47                 return -EIO;
  48         }
  49
  50         return 0;
  51 }
  52
  53 static int pfuze100_bind(struct udevice *dev)
  54 {
  55         int children;
  56         int regulators_node;
  57         const void *blob = gd->fdt_blob;
  58
  59         regulators_node = fdt_subnode_offset(blob, dev_of_offset(dev),
  60                                              "regulators");
  61         if (regulators_node <= 0) {
  62                 debug("%s: %s regulators subnode not found!", __func__,
  63                       dev->name);
  64                 return -ENXIO;
  65         }
  66
  67         debug("%s: '%s' - found regulators subnode\n", __func__, dev->name);
  68
  69         children = pmic_bind_children(dev, regulators_node, pmic_children_info);
  70         if (!children)
  71                 debug("%s: %s - no child found\n", __func__, dev->name);
  72
  73         /* Always return success for this device */
  74         return 0;
  75 }
  76
  77 static struct dm_pmic_ops pfuze100_ops = {
  78         .reg_count = pfuze100_reg_count,
  79         .read = pfuze100_read,
  80         .write = pfuze100_write,
  81 };
  82
  83 static const struct udevice_id pfuze100_ids[] = {
  84         { .compatible = "fsl,pfuze100", .data = PFUZE100, },
  85         { .compatible = "fsl,pfuze200", .data = PFUZE200, },
  86         { .compatible = "fsl,pfuze3000", .data = PFUZE3000, },
  87         { }
  88 };
  89
  90 U_BOOT_DRIVER(pmic_pfuze100) = {
  91         .name = "pfuze100 pmic",
  92         .id = UCLASS_PMIC,
  93         .of_match = pfuze100_ids,
  94         .bind = pfuze100_bind,
  95         .ops = &pfuze100_ops,
  96 };