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Release 4.11 drivers/power/reset/st-poweroff.c

/*
 * Copyright (C) 2014 STMicroelectronics
 *
 * Power off Restart driver, used in STMicroelectronics devices.
 *
 * Author: Christophe Kerello <christophe.kerello@st.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2, as
 * published by the Free Software Foundation.
 */

#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/mfd/syscon.h>
#include <linux/reboot.h>
#include <linux/regmap.h>


struct reset_syscfg {
	
struct regmap *regmap;
	/* syscfg used for reset */
	
unsigned int offset_rst;
	
unsigned int mask_rst;
	/* syscfg used for unmask the reset */
	
unsigned int offset_rst_msk;
	
unsigned int mask_rst_msk;
};

/* STiH407 */

#define STIH407_SYSCFG_4000	0x0

#define STIH407_SYSCFG_4008	0x20


static struct reset_syscfg stih407_reset = {
	.offset_rst = STIH407_SYSCFG_4000,
	.mask_rst = BIT(0),
	.offset_rst_msk = STIH407_SYSCFG_4008,
	.mask_rst_msk = BIT(0)
};



static struct reset_syscfg *st_restart_syscfg;


static int st_restart(struct notifier_block *this, unsigned long mode, void *cmd) { /* reset syscfg updated */ regmap_update_bits(st_restart_syscfg->regmap, st_restart_syscfg->offset_rst, st_restart_syscfg->mask_rst, 0); /* unmask the reset */ regmap_update_bits(st_restart_syscfg->regmap, st_restart_syscfg->offset_rst_msk, st_restart_syscfg->mask_rst_msk, 0); return NOTIFY_DONE; }

Contributors

PersonTokensPropCommitsCommitProp
Lee Jones4577.59%150.00%
Guenter Roeck1322.41%150.00%
Total58100.00%2100.00%

static struct notifier_block st_restart_nb = { .notifier_call = st_restart, .priority = 192, }; static const struct of_device_id st_reset_of_match[] = { { .compatible = "st,stih407-restart", .data = (void *)&stih407_reset, }, {} };
static int st_reset_probe(struct platform_device *pdev) { struct device_node *np = pdev->dev.of_node; const struct of_device_id *match; struct device *dev = &pdev->dev; match = of_match_device(st_reset_of_match, dev); if (!match) return -ENODEV; st_restart_syscfg = (struct reset_syscfg *)match->data; st_restart_syscfg->regmap = syscon_regmap_lookup_by_phandle(np, "st,syscfg"); if (IS_ERR(st_restart_syscfg->regmap)) { dev_err(dev, "No syscfg phandle specified\n"); return PTR_ERR(st_restart_syscfg->regmap); } return register_restart_handler(&st_restart_nb); }

Contributors

PersonTokensPropCommitsCommitProp
Lee Jones10695.50%150.00%
Guenter Roeck54.50%150.00%
Total111100.00%2100.00%

static struct platform_driver st_reset_driver = { .probe = st_reset_probe, .driver = { .name = "st_reset", .of_match_table = st_reset_of_match, }, };
static int __init st_reset_init(void) { return platform_driver_register(&st_reset_driver); }

Contributors

PersonTokensPropCommitsCommitProp
Lee Jones16100.00%1100.00%
Total16100.00%1100.00%

device_initcall(st_reset_init); MODULE_AUTHOR("Christophe Kerello <christophe.kerello@st.com>"); MODULE_DESCRIPTION("STMicroelectronics Power off Restart driver"); MODULE_LICENSE("GPL v2");

Overall Contributors

PersonTokensPropCommitsCommitProp
Lee Jones33789.87%133.33%
Guenter Roeck379.87%133.33%
Fabian Frederick10.27%133.33%
Total375100.00%3100.00%
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