134 lines
2.9 KiB
C
134 lines
2.9 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2024 Rockchip Electronics Co., Ltd.
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*/
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#include <common.h>
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#include <asm/gpio.h>
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#include <dm.h>
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#include <dm/lists.h>
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#include <dm/device-internal.h>
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#include <dm/of_access.h>
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#include <dm/pinctrl.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/sy7636a.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 = "vcom", .driver = SY7636A_REGULATOR_DRIVER_NAME },
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{ },
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};
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static const struct pmic_child_info thermal_child_info[] = {
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{ .prefix = "sy7636a_thermal", .driver = SY7636A_THERMAL_COMTATIBLE_NAME },
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{ },
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};
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static int sy7636a_reg_count(struct udevice *dev)
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{
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return SY7636A_REG_MAX;
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}
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static int sy7636a_write(struct udevice *dev, uint reg, const uint8_t *buff, 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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pr_err("sy7636a failed to write register: %#x, ret:%d\n", reg, ret);
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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 sy7636a_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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pr_err("sy7636a failed to write register: %#x, ret:%d\n", reg, ret);
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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 pmic_sy7636a_probe(struct udevice *dev)
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{
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struct gpio_desc gpio_desc[8];
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uint8_t data;
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int num;
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int ret;
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num = gpio_request_list_by_name(dev, "enable-gpios", gpio_desc, 8,
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GPIOD_IS_OUT | GPIOD_IS_OUT_ACTIVE);
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if (num < 0)
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dev_warn(dev, "sy7636a failed to get enable gpios:%d\n", ret);
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/* After enable, SY7636A requires 2.5ms delay time to enter active mode */
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udelay(2500);
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/* check is device i2c present */
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ret = dm_i2c_read(dev, SY7636A_REG_OPERATION_MODE_CRL, &data, 1);
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if (ret) {
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dev_warn(dev, "sy7636a i2c not present: %d\n", ret);
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goto fail;
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}
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return 0;
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fail:
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if (num > 0)
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gpio_free_list(dev, gpio_desc, num);
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return ret;
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}
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static int pmic_sy7636a_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, "regulators");
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if (!ofnode_valid(regulators_node)) {
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dev_err(dev, "Regulators subnode not found!");
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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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dev_err(dev, "Failed to bind sy7636a regulator\n");
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children = pmic_bind_children(dev, dev->node, thermal_child_info);
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if (!children)
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dev_err(dev, "Failed to bind sy7636a thermal\n");
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return 0;
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}
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static struct dm_pmic_ops sy7636a_ops = {
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.reg_count = sy7636a_reg_count,
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.read = sy7636a_read,
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.write = sy7636a_write,
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};
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static const struct udevice_id pmic_sy7636a_of_match[] = {
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{ .compatible = "silergy,sy7636a" },
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{ .compatible = "silergy,sy7636a-pmic" },
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{}
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};
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U_BOOT_DRIVER(pmic_sy7636a) = {
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.name = "pmic_sy7636a",
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.id = UCLASS_PMIC,
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.of_match = pmic_sy7636a_of_match,
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.probe = pmic_sy7636a_probe,
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.ops = &sy7636a_ops,
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.bind = pmic_sy7636a_bind,
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};
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