drivers/power/pmic/pmic_tps65910_dm.c

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