mirror of
https://github.com/AsahiLinux/u-boot
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96 lines
2 KiB
C
96 lines
2 KiB
C
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/*
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* Copyright (C) 2015 Google, Inc
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*
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* SPDX-License-Identifier: GPL-2.0+
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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 <power/pmic.h>
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#include <power/regulator.h>
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#include <power/s5m8767.h>
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DECLARE_GLOBAL_DATA_PTR;
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static const struct pmic_child_info pmic_children_info[] = {
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{ .prefix = "LDO", .driver = S5M8767_LDO_DRIVER },
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{ .prefix = "BUCK", .driver = S5M8767_BUCK_DRIVER },
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{ },
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};
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static int s5m8767_reg_count(struct udevice *dev)
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{
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return S5M8767_NUM_OF_REGS;
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}
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static int s5m8767_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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error("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 s5m8767_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
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{
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if (dm_i2c_read(dev, reg, buff, len)) {
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error("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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int s5m8767_enable_32khz_cp(struct udevice *dev)
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{
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return pmic_clrsetbits(dev, S5M8767_EN32KHZ_CP, 0, 1 << 1);
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}
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static int s5m8767_bind(struct udevice *dev)
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{
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int node;
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const void *blob = gd->fdt_blob;
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int children;
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node = fdt_subnode_offset(blob, dev->of_offset, "regulators");
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if (node <= 0) {
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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, 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 struct dm_pmic_ops s5m8767_ops = {
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.reg_count = s5m8767_reg_count,
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.read = s5m8767_read,
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.write = s5m8767_write,
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};
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static const struct udevice_id s5m8767_ids[] = {
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{ .compatible = "samsung,s5m8767-pmic" },
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{ }
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};
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U_BOOT_DRIVER(pmic_s5m8767) = {
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.name = "s5m8767_pmic",
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.id = UCLASS_PMIC,
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.of_match = s5m8767_ids,
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.bind = s5m8767_bind,
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.ops = &s5m8767_ops,
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};
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