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2ce8284c31
The DT of_device.h and of_platform.h date back to the separate of_platform_bus_type before it as merged into the regular platform bus. As part of that merge prepping Arm DT support 13 years ago, they "temporarily" include each other. They also include platform_device.h and of.h. As a result, there's a pretty much random mix of those include files used throughout the tree. In order to detangle these headers and replace the implicit includes with struct declarations, users need to explicitly include the correct includes. Acked-by: David Lechner <david@lechnology.com> Signed-off-by: Rob Herring <robh@kernel.org> Reviewed-by: Simon Glass <sjg@chromium.org> Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
113 lines
2.6 KiB
C
113 lines
2.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2014 STMicroelectronics
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*
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* Power off Restart driver, used in STMicroelectronics devices.
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*
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* Author: Christophe Kerello <christophe.kerello@st.com>
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*/
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/platform_device.h>
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#include <linux/mfd/syscon.h>
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#include <linux/reboot.h>
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#include <linux/regmap.h>
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struct reset_syscfg {
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struct regmap *regmap;
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/* syscfg used for reset */
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unsigned int offset_rst;
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unsigned int mask_rst;
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/* syscfg used for unmask the reset */
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unsigned int offset_rst_msk;
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unsigned int mask_rst_msk;
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};
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/* STiH407 */
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#define STIH407_SYSCFG_4000 0x0
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#define STIH407_SYSCFG_4008 0x20
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static struct reset_syscfg stih407_reset = {
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.offset_rst = STIH407_SYSCFG_4000,
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.mask_rst = BIT(0),
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.offset_rst_msk = STIH407_SYSCFG_4008,
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.mask_rst_msk = BIT(0)
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};
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static struct reset_syscfg *st_restart_syscfg;
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static int st_restart(struct notifier_block *this, unsigned long mode,
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void *cmd)
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{
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/* reset syscfg updated */
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regmap_update_bits(st_restart_syscfg->regmap,
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st_restart_syscfg->offset_rst,
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st_restart_syscfg->mask_rst,
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0);
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/* unmask the reset */
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regmap_update_bits(st_restart_syscfg->regmap,
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st_restart_syscfg->offset_rst_msk,
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st_restart_syscfg->mask_rst_msk,
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0);
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return NOTIFY_DONE;
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}
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static struct notifier_block st_restart_nb = {
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.notifier_call = st_restart,
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.priority = 192,
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};
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static const struct of_device_id st_reset_of_match[] = {
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{
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.compatible = "st,stih407-restart",
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.data = (void *)&stih407_reset,
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},
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{}
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};
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static int st_reset_probe(struct platform_device *pdev)
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{
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struct device_node *np = pdev->dev.of_node;
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const struct of_device_id *match;
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struct device *dev = &pdev->dev;
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match = of_match_device(st_reset_of_match, dev);
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if (!match)
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return -ENODEV;
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st_restart_syscfg = (struct reset_syscfg *)match->data;
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st_restart_syscfg->regmap =
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syscon_regmap_lookup_by_phandle(np, "st,syscfg");
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if (IS_ERR(st_restart_syscfg->regmap)) {
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dev_err(dev, "No syscfg phandle specified\n");
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return PTR_ERR(st_restart_syscfg->regmap);
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}
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return register_restart_handler(&st_restart_nb);
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}
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static struct platform_driver st_reset_driver = {
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.probe = st_reset_probe,
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.driver = {
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.name = "st_reset",
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.of_match_table = st_reset_of_match,
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},
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};
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static int __init st_reset_init(void)
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{
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return platform_driver_register(&st_reset_driver);
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}
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device_initcall(st_reset_init);
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MODULE_AUTHOR("Christophe Kerello <christophe.kerello@st.com>");
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MODULE_DESCRIPTION("STMicroelectronics Power off Restart driver");
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MODULE_LICENSE("GPL v2");
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