Release 4.14 drivers/watchdog/da9063_wdt.c
/*
* Watchdog driver for DA9063 PMICs.
*
* Copyright(c) 2012 Dialog Semiconductor Ltd.
*
* Author: Mariusz Wojtasik <mariusz.wojtasik@diasemi.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/watchdog.h>
#include <linux/platform_device.h>
#include <linux/uaccess.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/mfd/da9063/registers.h>
#include <linux/mfd/da9063/core.h>
#include <linux/regmap.h>
/*
* Watchdog selector to timeout in seconds.
* 0: WDT disabled;
* others: timeout = 2048 ms * 2^(TWDSCALE-1).
*/
static const unsigned int wdt_timeout[] = { 0, 2, 4, 8, 16, 32, 65, 131 };
#define DA9063_TWDSCALE_DISABLE 0
#define DA9063_TWDSCALE_MIN 1
#define DA9063_TWDSCALE_MAX (ARRAY_SIZE(wdt_timeout) - 1)
#define DA9063_WDT_MIN_TIMEOUT wdt_timeout[DA9063_TWDSCALE_MIN]
#define DA9063_WDT_MAX_TIMEOUT wdt_timeout[DA9063_TWDSCALE_MAX]
#define DA9063_WDG_TIMEOUT wdt_timeout[3]
#define DA9063_RESET_PROTECTION_MS 256
static unsigned int da9063_wdt_timeout_to_sel(unsigned int secs)
{
unsigned int i;
for (i = DA9063_TWDSCALE_MIN; i <= DA9063_TWDSCALE_MAX; i++) {
if (wdt_timeout[i] >= secs)
return i;
}
return DA9063_TWDSCALE_MAX;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Krystian Garbaciak | 45 | 100.00% | 1 | 100.00% |
Total | 45 | 100.00% | 1 | 100.00% |
static int _da9063_wdt_set_timeout(struct da9063 *da9063, unsigned int regval)
{
return regmap_update_bits(da9063->regmap, DA9063_REG_CONTROL_D,
DA9063_TWDSCALE_MASK, regval);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Krystian Garbaciak | 29 | 100.00% | 1 | 100.00% |
Total | 29 | 100.00% | 1 | 100.00% |
static int da9063_wdt_start(struct watchdog_device *wdd)
{
struct da9063 *da9063 = watchdog_get_drvdata(wdd);
unsigned int selector;
int ret;
selector = da9063_wdt_timeout_to_sel(wdd->timeout);
ret = _da9063_wdt_set_timeout(da9063, selector);
if (ret)
dev_err(da9063->dev, "Watchdog failed to start (err = %d)\n",
ret);
return ret;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Krystian Garbaciak | 61 | 95.31% | 1 | 50.00% |
Karsten Wiese | 3 | 4.69% | 1 | 50.00% |
Total | 64 | 100.00% | 2 | 100.00% |
static int da9063_wdt_stop(struct watchdog_device *wdd)
{
struct da9063 *da9063 = watchdog_get_drvdata(wdd);
int ret;
ret = regmap_update_bits(da9063->regmap, DA9063_REG_CONTROL_D,
DA9063_TWDSCALE_MASK, DA9063_TWDSCALE_DISABLE);
if (ret)
dev_alert(da9063->dev, "Watchdog failed to stop (err = %d)\n",
ret);
return ret;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Krystian Garbaciak | 55 | 96.49% | 1 | 50.00% |
Karsten Wiese | 2 | 3.51% | 1 | 50.00% |
Total | 57 | 100.00% | 2 | 100.00% |
static int da9063_wdt_ping(struct watchdog_device *wdd)
{
struct da9063 *da9063 = watchdog_get_drvdata(wdd);
int ret;
ret = regmap_write(da9063->regmap, DA9063_REG_CONTROL_F,
DA9063_WATCHDOG);
if (ret)
dev_alert(da9063->dev, "Failed to ping the watchdog (err = %d)\n",
ret);
return ret;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Krystian Garbaciak | 53 | 96.36% | 1 | 50.00% |
Karsten Wiese | 2 | 3.64% | 1 | 50.00% |
Total | 55 | 100.00% | 2 | 100.00% |
static int da9063_wdt_set_timeout(struct watchdog_device *wdd,
unsigned int timeout)
{
struct da9063 *da9063 = watchdog_get_drvdata(wdd);
unsigned int selector;
int ret;
selector = da9063_wdt_timeout_to_sel(timeout);
ret = _da9063_wdt_set_timeout(da9063, selector);
if (ret)
dev_err(da9063->dev, "Failed to set watchdog timeout (err = %d)\n",
ret);
else
wdd->timeout = wdt_timeout[selector];
return ret;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Krystian Garbaciak | 74 | 97.37% | 1 | 50.00% |
Karsten Wiese | 2 | 2.63% | 1 | 50.00% |
Total | 76 | 100.00% | 2 | 100.00% |
static int da9063_wdt_restart(struct watchdog_device *wdd, unsigned long action,
void *data)
{
struct da9063 *da9063 = watchdog_get_drvdata(wdd);
int ret;
ret = regmap_write(da9063->regmap, DA9063_REG_CONTROL_F,
DA9063_SHUTDOWN);
if (ret)
dev_alert(da9063->dev, "Failed to shutdown (err = %d)\n",
ret);
return ret;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Geert Uytterhoeven | 47 | 74.60% | 1 | 25.00% |
Guenter Roeck | 8 | 12.70% | 1 | 25.00% |
Damien Riegel | 6 | 9.52% | 1 | 25.00% |
Karsten Wiese | 2 | 3.17% | 1 | 25.00% |
Total | 63 | 100.00% | 4 | 100.00% |
static const struct watchdog_info da9063_watchdog_info = {
.options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING,
.identity = "DA9063 Watchdog",
};
static const struct watchdog_ops da9063_watchdog_ops = {
.owner = THIS_MODULE,
.start = da9063_wdt_start,
.stop = da9063_wdt_stop,
.ping = da9063_wdt_ping,
.set_timeout = da9063_wdt_set_timeout,
.restart = da9063_wdt_restart,
};
static int da9063_wdt_probe(struct platform_device *pdev)
{
struct da9063 *da9063;
struct watchdog_device *wdd;
if (!pdev->dev.parent)
return -EINVAL;
da9063 = dev_get_drvdata(pdev->dev.parent);
if (!da9063)
return -EINVAL;
wdd = devm_kzalloc(&pdev->dev, sizeof(*wdd), GFP_KERNEL);
if (!wdd)
return -ENOMEM;
wdd->info = &da9063_watchdog_info;
wdd->ops = &da9063_watchdog_ops;
wdd->min_timeout = DA9063_WDT_MIN_TIMEOUT;
wdd->max_timeout = DA9063_WDT_MAX_TIMEOUT;
wdd->min_hw_heartbeat_ms = DA9063_RESET_PROTECTION_MS;
wdd->timeout = DA9063_WDG_TIMEOUT;
wdd->parent = &pdev->dev;
wdd->status = WATCHDOG_NOWAYOUT_INIT_STATUS;
watchdog_set_restart_priority(wdd, 128);
watchdog_set_drvdata(wdd, da9063);
return devm_watchdog_register_device(&pdev->dev, wdd);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Krystian Garbaciak | 121 | 76.10% | 1 | 16.67% |
Karsten Wiese | 17 | 10.69% | 1 | 16.67% |
Pratyush Anand | 8 | 5.03% | 1 | 16.67% |
Damien Riegel | 6 | 3.77% | 1 | 16.67% |
Stefan Christ | 5 | 3.14% | 1 | 16.67% |
Guenter Roeck | 2 | 1.26% | 1 | 16.67% |
Total | 159 | 100.00% | 6 | 100.00% |
static struct platform_driver da9063_wdt_driver = {
.probe = da9063_wdt_probe,
.driver = {
.name = DA9063_DRVNAME_WATCHDOG,
},
};
module_platform_driver(da9063_wdt_driver);
MODULE_AUTHOR("Mariusz Wojtasik <mariusz.wojtasik@diasemi.com>");
MODULE_DESCRIPTION("Watchdog driver for Dialog DA9063");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:" DA9063_DRVNAME_WATCHDOG);
Overall Contributors
Person | Tokens | Prop | Commits | CommitProp |
Krystian Garbaciak | 620 | 83.90% | 1 | 12.50% |
Geert Uytterhoeven | 47 | 6.36% | 1 | 12.50% |
Karsten Wiese | 28 | 3.79% | 1 | 12.50% |
Damien Riegel | 17 | 2.30% | 1 | 12.50% |
Guenter Roeck | 10 | 1.35% | 2 | 25.00% |
Stefan Christ | 9 | 1.22% | 1 | 12.50% |
Pratyush Anand | 8 | 1.08% | 1 | 12.50% |
Total | 739 | 100.00% | 8 | 100.00% |
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