LXR uboot/drivers/power/pmic/pmic_tps65910

   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
  13static 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
  20static int pmic_tps65910_reg_count(struct udevice *dev)
  21{
  22        return TPS65910_NUM_REGS;
  23}
  24
  25static 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
  37static 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
  49static 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
  67static 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
  77static 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
  83static const struct udevice_id pmic_tps65910_match[] = {
  84        { .compatible = "ti,tps65910" },
  85        { /* sentinel */ }
  86};
  87
  88U_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};
  96