drivers/power/pmic/pmic_tps65910_dm.c

   1 /*
   2  * Copyright (C) EETS GmbH, 2017, Felix Brack <f.brack@eets.ch>
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <common.h>
   8 #include <dm.h>
   9 #include <i2c.h>
  10 #include <power/pmic.h>
  11 #include <power/regulator.h>
  12 #include <power/tps65910_pmic.h>
  13
  14 DECLARE_GLOBAL_DATA_PTR;
  15
  16 static const struct pmic_child_info pmic_children_info[] = {
  17         { .prefix = "ldo_", .driver = TPS65910_LDO_DRIVER },
  18         { .prefix = "buck_", .driver = TPS65910_BUCK_DRIVER },
  19         { .prefix = "boost_", .driver = TPS65910_BOOST_DRIVER },
  20         { },
  21 };
  22
  23 static int pmic_tps65910_reg_count(struct udevice *dev)
  24 {
  25         return TPS65910_NUM_REGS;
  26 }
  27
  28 static int pmic_tps65910_write(struct udevice *dev, uint reg, const u8 *buffer,
  29                                int len)
  30 {
  31         int ret;
  32
  33         ret = dm_i2c_write(dev, reg, buffer, len);
  34         if (ret)
  35                 error("%s write error on register %02x\n", dev->name, reg);
  36
  37         return ret;
  38 }
  39
  40 static int pmic_tps65910_read(struct udevice *dev, uint reg, u8 *buffer,
  41                               int len)
  42 {
  43         int ret;
  44
  45         ret = dm_i2c_read(dev, reg, buffer, len);
  46         if (ret)
  47                 error("%s read error on register %02x\n", dev->name, reg);
  48
  49         return ret;
  50 }
  51
  52 static int pmic_tps65910_bind(struct udevice *dev)
  53 {
  54         ofnode regulators_node;
  55         int children;
  56
  57         regulators_node = dev_read_subnode(dev, "regulators");
  58         if (!ofnode_valid(regulators_node)) {
  59                 debug("%s regulators subnode not found\n", dev->name);
  60                 return -EINVAL;
  61         }
  62
  63         children = pmic_bind_children(dev, regulators_node, pmic_children_info);
  64         if (!children)
  65                 debug("%s has no children (regulators)\n", dev->name);
  66
  67         return 0;
  68 }
  69
  70 static int pmic_tps65910_probe(struct udevice *dev)
  71 {
  72         /* use I2C control interface instead of I2C smartreflex interface to
  73          * access smartrefelex registers VDD1_OP_REG, VDD1_SR_REG, VDD2_OP_REG
  74          * and VDD2_SR_REG
  75          */
  76         return pmic_clrsetbits(dev, TPS65910_REG_DEVICE_CTRL, 0,
  77                                TPS65910_I2C_SEL_MASK);
  78 }
  79
  80 static struct dm_pmic_ops pmic_tps65910_ops = {
  81         .reg_count = pmic_tps65910_reg_count,
  82         .read = pmic_tps65910_read,
  83         .write = pmic_tps65910_write,
  84 };
  85
  86 static const struct udevice_id pmic_tps65910_match[] = {
  87         { .compatible = "ti,tps65910" },
  88         { /* sentinel */ }
  89 };
  90
  91 U_BOOT_DRIVER(pmic_tps65910) = {
  92         .name = "pmic_tps65910",
  93         .id = UCLASS_PMIC,
  94         .of_match = pmic_tps65910_match,
  95         .bind = pmic_tps65910_bind,
  96         .probe = pmic_tps65910_probe,
  97         .ops = &pmic_tps65910_ops,
  98 };