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