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MAXIM Semiconductor's PMIC, MAX77663 has 8 GPIO pins and 3 GPIO-like pins. It also supports interrupts from these pins. Add GPIO driver for these pins to control via GPIO APIs. Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
100 lines
2.1 KiB
C
100 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright(C) 2023 Svyatoslav Ryhel <clamor95@gmail.com>
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*/
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#include <dm.h>
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#include <dm/lists.h>
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#include <power/pmic.h>
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#include <power/max77663.h>
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static const struct pmic_child_info pmic_children_info[] = {
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{ .prefix = "ldo", .driver = MAX77663_LDO_DRIVER },
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{ .prefix = "sd", .driver = MAX77663_SD_DRIVER },
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{ },
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};
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static int max77663_write(struct udevice *dev, uint reg, const uint8_t *buff,
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int len)
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{
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int ret;
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ret = dm_i2c_write(dev, reg, buff, len);
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if (ret) {
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log_debug("write error to device: %p register: %#x!\n", dev, reg);
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return ret;
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}
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return 0;
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}
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static int max77663_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
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{
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int ret;
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ret = dm_i2c_read(dev, reg, buff, len);
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if (ret) {
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log_debug("read error from device: %p register: %#x!\n", dev, reg);
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return ret;
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}
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return 0;
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}
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static int max77663_bind(struct udevice *dev)
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{
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ofnode regulators_node;
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int children, ret;
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if (IS_ENABLED(CONFIG_SYSRESET_MAX77663)) {
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ret = device_bind_driver(dev, MAX77663_RST_DRIVER,
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"sysreset", NULL);
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if (ret) {
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log_err("cannot bind SYSRESET (ret = %d)\n", ret);
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return ret;
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}
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}
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if (IS_ENABLED(CONFIG_MAX77663_GPIO)) {
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ret = device_bind_driver(dev, MAX77663_GPIO_DRIVER,
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"gpio", NULL);
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if (ret) {
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log_err("cannot bind GPIOs (ret = %d)\n", ret);
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return ret;
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}
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}
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regulators_node = dev_read_subnode(dev, "regulators");
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if (!ofnode_valid(regulators_node)) {
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log_err("%s regulators subnode not found!\n", 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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log_err("%s - no child found\n", 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 max77663_ops = {
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.read = max77663_read,
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.write = max77663_write,
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};
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static const struct udevice_id max77663_ids[] = {
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{ .compatible = "maxim,max77663" },
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{ }
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};
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U_BOOT_DRIVER(pmic_max77663) = {
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.name = "max77663_pmic",
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.id = UCLASS_PMIC,
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.of_match = max77663_ids,
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.bind = max77663_bind,
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.ops = &max77663_ops,
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};
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