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326337fb00
Add PCA9450 regulator driver. This is complementary driver for the BUCKn and LDOn regulators provided by the PCA9450 PMIC driver. Currently the driver permits reading the settngs and configuring the BUCKn and LDOn regulators. Reviewed-by: Fabio Estevam <festevam@denx.de> Signed-off-by: Marek Vasut <marex@denx.de> Cc: Fabio Estevam <festevam@denx.de> Cc: Peng Fan <peng.fan@nxp.com> Cc: Stefano Babic <sbabic@denx.de>
98 lines
2.2 KiB
C
98 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright 2019 NXP
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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 <asm/global_data.h>
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#include <power/pmic.h>
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#include <power/regulator.h>
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#include <power/pca9450.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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/* buck */
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{ .prefix = "b", .driver = PCA9450_REGULATOR_DRIVER},
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{ .prefix = "B", .driver = PCA9450_REGULATOR_DRIVER},
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/* ldo */
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{ .prefix = "l", .driver = PCA9450_REGULATOR_DRIVER},
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{ .prefix = "L", .driver = PCA9450_REGULATOR_DRIVER},
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{ },
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};
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static int pca9450_reg_count(struct udevice *dev)
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{
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return PCA9450_REG_NUM;
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}
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static int pca9450_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 pca9450_read(struct udevice *dev, uint reg, uint8_t *buff,
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int len)
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{
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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 pca9450_bind(struct udevice *dev)
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{
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int children;
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ofnode regulators_node;
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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,
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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 pca9450_ops = {
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.reg_count = pca9450_reg_count,
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.read = pca9450_read,
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.write = pca9450_write,
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};
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static const struct udevice_id pca9450_ids[] = {
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{ .compatible = "nxp,pca9450a", .data = NXP_CHIP_TYPE_PCA9450A, },
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{ .compatible = "nxp,pca9450b", .data = NXP_CHIP_TYPE_PCA9450BC, },
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{ .compatible = "nxp,pca9450c", .data = NXP_CHIP_TYPE_PCA9450BC, },
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{ }
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};
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U_BOOT_DRIVER(pmic_pca9450) = {
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.name = "pca9450 pmic",
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.id = UCLASS_PMIC,
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.of_match = pca9450_ids,
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.bind = pca9450_bind,
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.ops = &pca9450_ops,
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};
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