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e160f7d430
At present devices use a simple integer offset to record the device tree node associated with the device. In preparation for supporting a live device tree, which uses a node pointer instead, refactor existing code to access this field through an inline function. Signed-off-by: Simon Glass <sjg@chromium.org>
87 lines
1.9 KiB
C
87 lines
1.9 KiB
C
/*
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* (C) Copyright 2016 Texas Instruments Incorporated, <www.ti.com>
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* Keerthy <j-keerthy@ti.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/lp873x.h>
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#include <dm/device.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 = LP873X_LDO_DRIVER },
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{ .prefix = "buck", .driver = LP873X_BUCK_DRIVER },
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{ },
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};
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static int lp873x_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 lp873x_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 lp873x_bind(struct udevice *dev)
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{
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int regulators_node;
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const void *blob = gd->fdt_blob;
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int children;
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int node = dev_of_offset(dev);
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regulators_node = fdt_subnode_offset(blob, node, "regulators");
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if (regulators_node <= 0) {
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printf("%s: %s reg subnode not found!", __func__, dev->name);
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return -ENXIO;
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}
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children = pmic_bind_children(dev, regulators_node, pmic_children_info);
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if (!children)
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printf("%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 lp873x_ops = {
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.read = lp873x_read,
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.write = lp873x_write,
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};
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static const struct udevice_id lp873x_ids[] = {
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{ .compatible = "ti,lp8732", .data = LP8732 },
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{ .compatible = "ti,lp8733" , .data = LP8733 },
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{ }
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};
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U_BOOT_DRIVER(pmic_lp873x) = {
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.name = "lp873x_pmic",
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.id = UCLASS_PMIC,
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.of_match = lp873x_ids,
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.bind = lp873x_bind,
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.ops = &lp873x_ops,
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};
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