mirror of
https://github.com/AsahiLinux/u-boot
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91 lines
1.9 KiB
C
91 lines
1.9 KiB
C
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/*
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* Copyright (C) 2015 Google, Inc
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* Written by Simon Glass <sjg@chromium.org>
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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 <dm.h>
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#include <errno.h>
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#include <fdtdec.h>
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#include <libfdt.h>
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#include <power/act8846_pmic.h>
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#include <power/pmic.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 = "REG", .driver = "act8846_reg"},
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{ },
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};
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static int act8846_reg_count(struct udevice *dev)
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{
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return ACT8846_NUM_OF_REGS;
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}
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static int act8846_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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debug("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 act8846_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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debug("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 act8846_bind(struct udevice *dev)
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{
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const void *blob = gd->fdt_blob;
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int regulators_node;
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int children;
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regulators_node = fdt_subnode_offset(blob, dev->of_offset,
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"regulators");
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if (regulators_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, 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 struct dm_pmic_ops act8846_ops = {
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.reg_count = act8846_reg_count,
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.read = act8846_read,
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.write = act8846_write,
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};
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static const struct udevice_id act8846_ids[] = {
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{ .compatible = "active-semi,act8846" },
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{ }
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};
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U_BOOT_DRIVER(pmic_act8846) = {
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.name = "act8846 pmic",
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.id = UCLASS_PMIC,
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.of_match = act8846_ids,
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.bind = act8846_bind,
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.ops = &act8846_ops,
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};
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