mirror of
https://github.com/AsahiLinux/u-boot
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7a869e6cd1
Update the pmic uclass and all pmics to support a live device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
90 lines
2 KiB
C
90 lines
2 KiB
C
/*
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* Copyright (C) 2014-2015 Samsung Electronics
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* Przemyslaw Marczak <p.marczak@samsung.com>
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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/max77686_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 = "LDO", .driver = MAX77686_LDO_DRIVER },
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{ .prefix = "BUCK", .driver = MAX77686_BUCK_DRIVER },
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{ },
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};
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static int max77686_reg_count(struct udevice *dev)
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{
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return MAX77686_NUM_OF_REGS;
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}
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static int max77686_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 max77686_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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static int max77686_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, "voltage-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 struct dm_pmic_ops max77686_ops = {
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.reg_count = max77686_reg_count,
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.read = max77686_read,
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.write = max77686_write,
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};
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static const struct udevice_id max77686_ids[] = {
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{ .compatible = "maxim,max77686" },
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{ }
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};
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U_BOOT_DRIVER(pmic_max77686) = {
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.name = "max77686_pmic",
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.id = UCLASS_PMIC,
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.of_match = max77686_ids,
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.bind = max77686_bind,
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.ops = &max77686_ops,
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};
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