/* * Watchdog driver for the wm8350 * * Copyright (C) 2007, 2008 Wolfson Microelectronics * * 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 */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include #include #include #include #include #include #include #include static bool nowayout = WATCHDOG_NOWAYOUT; module_param(nowayout, bool, 0); MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); static DEFINE_MUTEX(wdt_mutex); static struct { unsigned int time; /* Seconds */ u16 val; /* To be set in WM8350_SYSTEM_CONTROL_2 */ } wm8350_wdt_cfgs[] = { { 1, 0x02 }, { 2, 0x04 }, { 4, 0x05 }, }; static int wm8350_wdt_set_timeout(struct watchdog_device *wdt_dev, unsigned int timeout) { struct wm8350 *wm8350 = watchdog_get_drvdata(wdt_dev); int ret, i; u16 reg; for (i = 0; i < ARRAY_SIZE(wm8350_wdt_cfgs); i++) if (wm8350_wdt_cfgs[i].time == timeout) break; if (i == ARRAY_SIZE(wm8350_wdt_cfgs)) return -EINVAL; mutex_lock(&wdt_mutex); wm8350_reg_unlock(wm8350); reg = wm8350_reg_read(wm8350, WM8350_SYSTEM_CONTROL_2); reg &= ~WM8350_WDOG_TO_MASK; reg |= wm8350_wdt_cfgs[i].val; ret = wm8350_reg_write(wm8350, WM8350_SYSTEM_CONTROL_2, reg); wm8350_reg_lock(wm8350); mutex_unlock(&wdt_mutex); wdt_dev->timeout = timeout; return ret; } static int wm8350_wdt_start(struct watchdog_device *wdt_dev) { struct wm8350 *wm8350 = watchdog_get_drvdata(wdt_dev); int ret; u16 reg; mutex_lock(&wdt_mutex); wm8350_reg_unlock(wm8350); reg = wm8350_reg_read(wm8350, WM8350_SYSTEM_CONTROL_2); reg &= ~WM8350_WDOG_MODE_MASK; reg |= 0x20; ret = wm8350_reg_write(wm8350, WM8350_SYSTEM_CONTROL_2, reg); wm8350_reg_lock(wm8350); mutex_unlock(&wdt_mutex); return ret; } static int wm8350_wdt_stop(struct watchdog_device *wdt_dev) { struct wm8350 *wm8350 = watchdog_get_drvdata(wdt_dev); int ret; u16 reg; mutex_lock(&wdt_mutex); wm8350_reg_unlock(wm8350); reg = wm8350_reg_read(wm8350, WM8350_SYSTEM_CONTROL_2); reg &= ~WM8350_WDOG_MODE_MASK; ret = wm8350_reg_write(wm8350, WM8350_SYSTEM_CONTROL_2, reg); wm8350_reg_lock(wm8350); mutex_unlock(&wdt_mutex); return ret; } static int wm8350_wdt_ping(struct watchdog_device *wdt_dev) { struct wm8350 *wm8350 = watchdog_get_drvdata(wdt_dev); int ret; u16 reg; mutex_lock(&wdt_mutex); reg = wm8350_reg_read(wm8350, WM8350_SYSTEM_CONTROL_2); ret = wm8350_reg_write(wm8350, WM8350_SYSTEM_CONTROL_2, reg); mutex_unlock(&wdt_mutex); return ret; } static const struct watchdog_info wm8350_wdt_info = { .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE, .identity = "WM8350 Watchdog", }; static const struct watchdog_ops wm8350_wdt_ops = { .owner = THIS_MODULE, .start = wm8350_wdt_start, .stop = wm8350_wdt_stop, .ping = wm8350_wdt_ping, .set_timeout = wm8350_wdt_set_timeout, }; static struct watchdog_device wm8350_wdt = { .info = &wm8350_wdt_info, .ops = &wm8350_wdt_ops, .timeout = 4, .min_timeout = 1, .max_timeout = 4, }; static int wm8350_wdt_probe(struct platform_device *pdev) { struct wm8350 *wm8350 = platform_get_drvdata(pdev); if (!wm8350) { pr_err("No driver data supplied\n"); return -ENODEV; } watchdog_set_nowayout(&wm8350_wdt, nowayout); watchdog_set_drvdata(&wm8350_wdt, wm8350); wm8350_wdt.parent = &pdev->dev; /* Default to 4s timeout */ wm8350_wdt_set_timeout(&wm8350_wdt, 4); return watchdog_register_device(&wm8350_wdt); } static int wm8350_wdt_remove(struct platform_device *pdev) { watchdog_unregister_device(&wm8350_wdt); return 0; } static struct platform_driver wm8350_wdt_driver = { .probe = wm8350_wdt_probe, .remove = wm8350_wdt_remove, .driver = { .name = "wm8350-wdt", }, }; module_platform_driver(wm8350_wdt_driver); MODULE_AUTHOR("Mark Brown"); MODULE_DESCRIPTION("WM8350 Watchdog"); MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:wm8350-wdt"); nified
authorZach Ploskey <zach@ploskey.com>2017-01-22 00:47:19 -0800
committerAndy Shevchenko <andriy.shevchenko@linux.intel.com>2017-01-22 12:47:06 +0200
commitcfee5d63767b2e7997c1f36420d008abbe61565c (patch)
treec66a512525d224f9675c33a8d156e0f058db1de6 /drivers/usb/wusbcore
parent5a00b6c2438460b870a451f14593fc40d3c7edf6 (diff)
platform/x86: ideapad-laptop: handle ACPI event 1
On Ideapad laptops, ACPI event 1 is currently not handled. Many models log "ideapad_laptop: Unknown event: 1" every 20 seconds or so while running on battery power. Some convertible laptops receive this event when switching in and out of tablet mode. This adds and additional case for event 1 in ideapad_acpi_notify to call ideapad_input_report(priv, vpc_bit), so that the event is reported to userspace and we avoid unnecessary logging. Fixes bug #107481 (https://bugzilla.kernel.org/show_bug.cgi?id=107481) Fixes bug #65751 (https://bugzilla.kernel.org/show_bug.cgi?id=65751) Signed-off-by: Zach Ploskey <zach@ploskey.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Diffstat (limited to 'drivers/usb/wusbcore')