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https://github.com/brain-hackers/u-boot-brain
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132 lines
2.8 KiB
C
132 lines
2.8 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2018 Flowbird
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* Martin Fuzzey <martin.fuzzey@flowbird.group>
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*/
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#include <common.h>
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#include <fdtdec.h>
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#include <errno.h>
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#include <dm.h>
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#include <i2c.h>
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#include <log.h>
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#include <power/pmic.h>
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#include <power/regulator.h>
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#include <power/da9063_pmic.h>
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static const struct pmic_child_info pmic_children_info[] = {
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{ .prefix = "ldo", .driver = DA9063_LDO_DRIVER },
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{ .prefix = "b", .driver = DA9063_BUCK_DRIVER },
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{ },
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};
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/*
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* The register map is non contiguous and attempts to read in the holes fail.
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* But "pmic dump" tries to dump the full register map.
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* So define the holes here so we can fix that.
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*/
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struct da9063_reg_hole {
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u16 first;
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u16 last;
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};
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static const struct da9063_reg_hole da9063_reg_holes[] = {
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DA9063_REG_HOLE_1,
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DA9063_REG_HOLE_2,
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DA9063_REG_HOLE_3,
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/* These aren't readable. I can't see why from the datasheet but
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* attempts to read fail and the kernel marks them unreadable too,
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*/
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{DA9063_REG_OTP_COUNT, DA9063_REG_OTP_DATA},
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};
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static int da9063_reg_count(struct udevice *dev)
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{
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return DA9063_NUM_OF_REGS;
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}
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static bool da9063_reg_valid(uint reg)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(da9063_reg_holes); i++) {
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const struct da9063_reg_hole *hole = &da9063_reg_holes[i];
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if (reg >= hole->first && reg <= hole->last)
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return false;
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}
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return true;
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}
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static int da9063_write(struct udevice *dev, uint reg, const uint8_t *buff,
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int len)
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{
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if (dm_i2c_write(dev, reg, buff, len)) {
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pr_err("write error to device: %p register: %#x!", dev, reg);
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return -EIO;
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}
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return 0;
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}
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static int da9063_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
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{
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if (!da9063_reg_valid(reg))
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return -ENODATA;
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if (dm_i2c_read(dev, reg, buff, len)) {
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pr_err("read error from device: %p register: %#x!", dev, reg);
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return -EIO;
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}
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return 0;
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}
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static int da9063_bind(struct udevice *dev)
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{
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ofnode regulators_node;
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int children;
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regulators_node = dev_read_subnode(dev, "regulators");
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if (!ofnode_valid(regulators_node)) {
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debug("%s: %s regulators subnode not found!", __func__,
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dev->name);
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return -ENXIO;
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}
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debug("%s: '%s' - found regulators subnode\n", __func__, dev->name);
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children = pmic_bind_children(dev, regulators_node, pmic_children_info);
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if (!children)
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debug("%s: %s - no child found\n", __func__, dev->name);
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/* Always return success for this device */
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return 0;
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}
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static int da9063_probe(struct udevice *dev)
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{
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return i2c_set_chip_addr_offset_mask(dev, 0x1);
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}
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static struct dm_pmic_ops da9063_ops = {
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.reg_count = da9063_reg_count,
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.read = da9063_read,
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.write = da9063_write,
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};
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static const struct udevice_id da9063_ids[] = {
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{ .compatible = "dlg,da9063" },
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{ }
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};
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U_BOOT_DRIVER(pmic_da9063) = {
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.name = "da9063_pmic",
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.id = UCLASS_PMIC,
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.of_match = da9063_ids,
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.bind = da9063_bind,
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.probe = da9063_probe,
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.ops = &da9063_ops,
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};
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