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

/*
 * 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.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * Copyright (C) 2012 ARM Limited
 */

#include <linux/delay.h>
#include <linux/notifier.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/reboot.h>
#include <linux/stat.h>
#include <linux/vexpress.h>


static void vexpress_reset_do(struct device *dev, const char *what) { int err = -ENOENT; struct regmap *reg = dev_get_drvdata(dev); if (reg) { err = regmap_write(reg, 0, 0); if (!err) mdelay(1000); } dev_emerg(dev, "Unable to %s (%d)\n", what, err); }

Contributors

PersonTokensPropCommitsCommitProp
Pawel Moll70100.00%3100.00%
Total70100.00%3100.00%

static struct device *vexpress_power_off_device;
static void vexpress_power_off(void) { vexpress_reset_do(vexpress_power_off_device, "power off"); }

Contributors

PersonTokensPropCommitsCommitProp
Pawel Moll1493.33%150.00%
Catalin Marinas16.67%150.00%
Total15100.00%2100.00%

static struct device *vexpress_restart_device;
static int vexpress_restart(struct notifier_block *this, unsigned long mode, void *cmd) { vexpress_reset_do(vexpress_restart_device, "restart"); return NOTIFY_DONE; }

Contributors

PersonTokensPropCommitsCommitProp
Pawel Moll1551.72%133.33%
Guenter Roeck1344.83%133.33%
Catalin Marinas13.45%133.33%
Total29100.00%3100.00%

static struct notifier_block vexpress_restart_nb = { .notifier_call = vexpress_restart, .priority = 128, };
static ssize_t vexpress_reset_active_show(struct device *dev, struct device_attribute *attr, char *buf) { return sprintf(buf, "%d\n", vexpress_restart_device == dev); }

Contributors

PersonTokensPropCommitsCommitProp
Pawel Moll32100.00%1100.00%
Total32100.00%1100.00%


static ssize_t vexpress_reset_active_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { long value; int err = kstrtol(buf, 0, &value); if (!err && value) vexpress_restart_device = dev; return err ? err : count; }

Contributors

PersonTokensPropCommitsCommitProp
Pawel Moll58100.00%1100.00%
Total58100.00%1100.00%

static DEVICE_ATTR(active, S_IRUGO | S_IWUSR, vexpress_reset_active_show, vexpress_reset_active_store); enum vexpress_reset_func { FUNC_RESET, FUNC_SHUTDOWN, FUNC_REBOOT }; static const struct of_device_id vexpress_reset_of_match[] = { { .compatible = "arm,vexpress-reset", .data = (void *)FUNC_RESET, }, { .compatible = "arm,vexpress-shutdown", .data = (void *)FUNC_SHUTDOWN }, { .compatible = "arm,vexpress-reboot", .data = (void *)FUNC_REBOOT }, {} };
static int _vexpress_register_restart_handler(struct device *dev) { int err; vexpress_restart_device = dev; err = register_restart_handler(&vexpress_restart_nb); if (err) { dev_err(dev, "cannot register restart handler (err=%d)\n", err); return err; } device_create_file(dev, &dev_attr_active); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Guenter Roeck55100.00%1100.00%
Total55100.00%1100.00%


static int vexpress_reset_probe(struct platform_device *pdev) { const struct of_device_id *match = of_match_device(vexpress_reset_of_match, &pdev->dev); struct regmap *regmap; int ret = 0; if (!match) return -EINVAL; regmap = devm_regmap_init_vexpress_config(&pdev->dev); if (IS_ERR(regmap)) return PTR_ERR(regmap); dev_set_drvdata(&pdev->dev, regmap); switch ((enum vexpress_reset_func)match->data) { case FUNC_SHUTDOWN: vexpress_power_off_device = &pdev->dev; pm_power_off = vexpress_power_off; break; case FUNC_RESET: if (!vexpress_restart_device) ret = _vexpress_register_restart_handler(&pdev->dev); break; case FUNC_REBOOT: ret = _vexpress_register_restart_handler(&pdev->dev); break; }; return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Pawel Moll12889.51%466.67%
Guenter Roeck106.99%116.67%
Catalin Marinas53.50%116.67%
Total143100.00%6100.00%

static struct platform_driver vexpress_reset_driver = { .probe = vexpress_reset_probe, .driver = { .name = "vexpress-reset", .of_match_table = vexpress_reset_of_match, }, };
static int __init vexpress_reset_init(void) { return platform_driver_register(&vexpress_reset_driver); }

Contributors

PersonTokensPropCommitsCommitProp
Pawel Moll16100.00%1100.00%
Total16100.00%1100.00%

device_initcall(vexpress_reset_init);

Overall Contributors

PersonTokensPropCommitsCommitProp
Pawel Moll47580.92%450.00%
Guenter Roeck10117.21%112.50%
Catalin Marinas91.53%112.50%
Fabian Frederick10.17%112.50%
Ben Dooks10.17%112.50%
Total587100.00%8100.00%
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