mirror of
https://github.com/AsahiLinux/u-boot
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1e94b46f73
This old patch was marked as deferred. Bring it back to life, to continue towards the removal of common.h Move this out of the common header and include it only where needed. Signed-off-by: Simon Glass <sjg@chromium.org>
93 lines
2.2 KiB
C
93 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2017 Álvaro Fernández Rojas <noltari@gmail.com>
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*
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* Derived from linux/drivers/power/reset/syscon-reboot.c:
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* Copyright (C) 2013, Applied Micro Circuits Corporation
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* Author: Feng Kan <fkan@apm.com>
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*/
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#include <common.h>
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#include <dm.h>
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#include <errno.h>
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#include <regmap.h>
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#include <sysreset.h>
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#include <syscon.h>
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#include <linux/err.h>
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#include <linux/printk.h>
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struct syscon_reboot_priv {
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struct regmap *regmap;
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unsigned int offset;
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unsigned int mask;
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unsigned int value;
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};
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static int syscon_reboot_request(struct udevice *dev, enum sysreset_t type)
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{
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struct syscon_reboot_priv *priv = dev_get_priv(dev);
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ulong driver_data = dev_get_driver_data(dev);
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if (type != driver_data)
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return -EPROTONOSUPPORT;
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regmap_update_bits(priv->regmap, priv->offset, priv->mask, priv->value);
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return -EINPROGRESS;
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}
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static struct sysreset_ops syscon_reboot_ops = {
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.request = syscon_reboot_request,
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};
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static int syscon_reboot_probe(struct udevice *dev)
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{
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struct syscon_reboot_priv *priv = dev_get_priv(dev);
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int err;
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int mask_err, value_err;
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priv->regmap = syscon_regmap_lookup_by_phandle(dev, "regmap");
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if (IS_ERR(priv->regmap)) {
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pr_err("unable to find regmap\n");
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return -ENODEV;
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}
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err = dev_read_u32(dev, "offset", &priv->offset);
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if (err) {
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pr_err("unable to find offset\n");
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return -ENOENT;
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}
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mask_err = dev_read_u32(dev, "mask", &priv->mask);
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value_err = dev_read_u32(dev, "value", &priv->value);
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if (mask_err && value_err) {
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pr_err("unable to find mask and value\n");
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return -EINVAL;
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}
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if (value_err) {
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/* support old binding */
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priv->value = priv->mask;
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priv->mask = 0xffffffff;
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} else if (mask_err) {
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/* support value without mask*/
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priv->mask = 0xffffffff;
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}
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return 0;
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}
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static const struct udevice_id syscon_reboot_ids[] = {
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{ .compatible = "syscon-reboot", .data = SYSRESET_COLD },
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{ .compatible = "syscon-poweroff", .data = SYSRESET_POWER_OFF },
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{ /* sentinel */ }
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};
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U_BOOT_DRIVER(syscon_reboot) = {
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.name = "syscon_reboot",
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.id = UCLASS_SYSRESET,
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.of_match = syscon_reboot_ids,
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.probe = syscon_reboot_probe,
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.priv_auto = sizeof(struct syscon_reboot_priv),
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.ops = &syscon_reboot_ops,
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};
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