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https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2026-09-18 23:09:29 +02:00
Linus Walleij
b8bc38bcec
Move the DBx500 PRCMU definitions into the DB8500 PRCMU header and delete the wrapper header. Convert users of simple PRCMU wrappers to call the DB8500 helpers directly. The dbx500-prcmu.h header was the result of an earlier attempt to abstract several DBx5x SoC PRCMU units to use the same abstract header. They are deleted from the kernel and this is not just causing maintenance burden and build errors. The stub code is using -ENOSYS in a way checkpatch complains about so replace these with -EINVAL while we're at it. Assisted-by: Codex:gpt-5-5 Reported-by: kernel test robot <lkp@intel.com> Closes: https://lore.kernel.org/oe-kbuild-all/202606180825.vUSQntkJ-lkp@intel.com/ Signed-off-by: Linus Walleij <linusw@kernel.org> Acked-by: Brian Masney <bmasney@redhat.com> Acked-by: Guenter Roeck <linux@roeck-us.net> Acked-by: Mark Brown <broonie@kernel.org> Link: https://lore.kernel.org/oe-kbuild-all/202606180825.vUSQntkJ-lkp@intel.com/ Link: https://patch.msgid.link/20260619-mfd-prcmu-merge-headers-v1-1-8ea0ee23b4d6@kernel.org Signed-off-by: Lee Jones <lee@kernel.org>
148 lines
3.6 KiB
C
148 lines
3.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) ST-Ericsson SA 2011-2013
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*
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* Author: Mathieu Poirier <mathieu.poirier@linaro.org> for ST-Ericsson
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* Author: Jonas Aaberg <jonas.aberg@stericsson.com> for ST-Ericsson
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/moduleparam.h>
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#include <linux/err.h>
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#include <linux/uaccess.h>
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#include <linux/watchdog.h>
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#include <linux/platform_device.h>
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#include <linux/mfd/db8500-prcmu.h>
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#define WATCHDOG_TIMEOUT 600 /* 10 minutes */
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#define WATCHDOG_MIN 0
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#define WATCHDOG_MAX28 268435 /* 28 bit resolution in ms == 268435.455 s */
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static unsigned int timeout = WATCHDOG_TIMEOUT;
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module_param(timeout, uint, 0);
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MODULE_PARM_DESC(timeout,
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"Watchdog timeout in seconds. default="
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__MODULE_STRING(WATCHDOG_TIMEOUT) ".");
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static bool nowayout = WATCHDOG_NOWAYOUT;
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module_param(nowayout, bool, 0);
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MODULE_PARM_DESC(nowayout,
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"Watchdog cannot be stopped once started (default="
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__MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
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static int db8500_wdt_start(struct watchdog_device *wdd)
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{
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return db8500_prcmu_enable_a9wdog(PRCMU_WDOG_ALL);
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}
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static int db8500_wdt_stop(struct watchdog_device *wdd)
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{
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return db8500_prcmu_disable_a9wdog(PRCMU_WDOG_ALL);
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}
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static int db8500_wdt_keepalive(struct watchdog_device *wdd)
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{
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return db8500_prcmu_kick_a9wdog(PRCMU_WDOG_ALL);
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}
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static int db8500_wdt_set_timeout(struct watchdog_device *wdd,
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unsigned int timeout)
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{
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db8500_wdt_stop(wdd);
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db8500_prcmu_load_a9wdog(PRCMU_WDOG_ALL, timeout * 1000);
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db8500_wdt_start(wdd);
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return 0;
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}
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static const struct watchdog_info db8500_wdt_info = {
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.options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE,
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.identity = "DB8500 WDT",
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.firmware_version = 1,
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};
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static const struct watchdog_ops db8500_wdt_ops = {
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.owner = THIS_MODULE,
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.start = db8500_wdt_start,
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.stop = db8500_wdt_stop,
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.ping = db8500_wdt_keepalive,
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.set_timeout = db8500_wdt_set_timeout,
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};
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static struct watchdog_device db8500_wdt = {
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.info = &db8500_wdt_info,
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.ops = &db8500_wdt_ops,
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.min_timeout = WATCHDOG_MIN,
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.max_timeout = WATCHDOG_MAX28,
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};
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static int db8500_wdt_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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int ret;
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timeout = 600; /* Default to 10 minutes */
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db8500_wdt.parent = dev;
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watchdog_set_nowayout(&db8500_wdt, nowayout);
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/* disable auto off on sleep */
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db8500_prcmu_config_a9wdog(PRCMU_WDOG_CPU1, false);
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/* set HW initial value */
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db8500_prcmu_load_a9wdog(PRCMU_WDOG_ALL, timeout * 1000);
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ret = devm_watchdog_register_device(dev, &db8500_wdt);
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if (ret)
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return ret;
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dev_info(dev, "initialized\n");
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return 0;
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}
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static int db8500_wdt_suspend(struct platform_device *pdev,
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pm_message_t state)
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{
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if (watchdog_active(&db8500_wdt)) {
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db8500_wdt_stop(&db8500_wdt);
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db8500_prcmu_config_a9wdog(PRCMU_WDOG_CPU1, true);
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db8500_prcmu_load_a9wdog(PRCMU_WDOG_ALL, timeout * 1000);
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db8500_wdt_start(&db8500_wdt);
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}
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return 0;
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}
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static int db8500_wdt_resume(struct platform_device *pdev)
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{
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if (watchdog_active(&db8500_wdt)) {
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db8500_wdt_stop(&db8500_wdt);
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db8500_prcmu_config_a9wdog(PRCMU_WDOG_CPU1, false);
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db8500_prcmu_load_a9wdog(PRCMU_WDOG_ALL, timeout * 1000);
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db8500_wdt_start(&db8500_wdt);
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}
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return 0;
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}
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static struct platform_driver db8500_wdt_driver = {
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.probe = db8500_wdt_probe,
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.suspend = pm_ptr(db8500_wdt_suspend),
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.resume = pm_ptr(db8500_wdt_resume),
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.driver = {
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.name = "db8500_wdt",
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},
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};
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module_platform_driver(db8500_wdt_driver);
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MODULE_AUTHOR("Jonas Aaberg <jonas.aberg@stericsson.com>");
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MODULE_DESCRIPTION("DB8500 Watchdog Driver");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("platform:db8500_wdt");
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