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MAX8907 PMIC has embedded poweroff function used by some device to initiane device power off. Implement it as optional sysreset driver guarded by kconfig option and system-power-controller device tree property. Tested-by: Ion Agorria <ion@agorria.com> Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
95 lines
2.1 KiB
C
95 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright(C) 2024 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/max8907.h>
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static const struct pmic_child_info pmic_children_info[] = {
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{ .prefix = "ldo", .driver = MAX8907_LDO_DRIVER },
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{ .prefix = "sd", .driver = MAX8907_SD_DRIVER },
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{ },
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};
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static int max8907_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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log_debug("%s: write error to device: %p register: %#x!\n",
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__func__, 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 max8907_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("%s: read error from device: %p register: %#x!\n",
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__func__, 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 max8907_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_MAX8907) &&
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dev_read_bool(dev, "maxim,system-power-controller")) {
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ret = device_bind_driver_to_node(dev, MAX8907_RST_DRIVER,
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"sysreset", dev_ofnode(dev),
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NULL);
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if (ret) {
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log_debug("%s: cannot bind SYSRESET (ret = %d)\n",
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__func__, 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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log_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 max8907_ops = {
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.read = max8907_read,
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.write = max8907_write,
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};
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static const struct udevice_id max8907_ids[] = {
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{ .compatible = "maxim,max8907" },
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{ }
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};
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U_BOOT_DRIVER(pmic_max8907) = {
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.name = "max8907_pmic",
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.id = UCLASS_PMIC,
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.of_match = max8907_ids,
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.bind = max8907_bind,
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.ops = &max8907_ops,
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};
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