From patchwork Fri Jan 22 12:31:57 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andy Shevchenko X-Patchwork-Id: 12039309 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A41E2C433E0 for ; Fri, 22 Jan 2021 12:35:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 60D5323437 for ; Fri, 22 Jan 2021 12:35:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728137AbhAVMf1 (ORCPT ); Fri, 22 Jan 2021 07:35:27 -0500 Received: from mga03.intel.com ([134.134.136.65]:46761 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728155AbhAVMek (ORCPT ); Fri, 22 Jan 2021 07:34:40 -0500 IronPort-SDR: jsSXpFNxbuZAoZ7TLFCJozuny2DmLRY28EcOYabAwvrWmPEJlnhAaT+oBAOV30WkYVMGaOc2Jk aF4bPZ/ndoEg== X-IronPort-AV: E=McAfee;i="6000,8403,9871"; a="179520242" X-IronPort-AV: E=Sophos;i="5.79,366,1602572400"; d="scan'208";a="179520242" Received: from orsmga002.jf.intel.com ([10.7.209.21]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Jan 2021 04:32:07 -0800 IronPort-SDR: k8e58dHKmjYi4OEbtVVeCJjVcf7cgHiirRI2LG61c8QIKUAWwn8RlNDQAk8rfI6oERvP7Upi4S lrN+j0sd+3MQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.79,366,1602572400"; d="scan'208";a="367405632" Received: from black.fi.intel.com ([10.237.72.28]) by orsmga002.jf.intel.com with ESMTP; 22 Jan 2021 04:32:03 -0800 Received: by black.fi.intel.com (Postfix, from userid 1003) id C405014F; Fri, 22 Jan 2021 14:32:02 +0200 (EET) From: Andy Shevchenko To: Thomas Gleixner , Ingo Molnar , Borislav Petkov , x86@kernel.org, "H. Peter Anvin" , platform-driver-x86@vger.kernel.org, Mark Gross , linux-watchdog@vger.kernel.org, Wim Van Sebroeck , Guenter Roeck Cc: Andy Shevchenko , Linus Walleij Subject: [PATCH v1 1/5] watchdog: intel_scu_watchdog: Remove driver for deprecated platform Date: Fri, 22 Jan 2021 14:31:57 +0200 Message-Id: <20210122123201.40935-1-andriy.shevchenko@linux.intel.com> X-Mailer: git-send-email 2.29.2 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-watchdog@vger.kernel.org Intel Moorestown and Medfield are quite old Intel Atom based 32-bit platforms, which were in limited use in some Android phones, tablets and consumer electronics more than eight years ago. There are no bugs or problems ever reported outside from Intel for breaking any of that platforms for years. It seems no real users exists who run more or less fresh kernel on it. The commit 05f4434bc130 ("ASoC: Intel: remove mfld_machine") also in align with this theory. Due to above and to reduce a burden of supporting outdated drivers we remove the support of outdated platforms completely. Signed-off-by: Andy Shevchenko Acked-by: Linus Walleij Reviewed-by: Guenter Roeck --- drivers/watchdog/Kconfig | 9 - drivers/watchdog/Makefile | 1 - drivers/watchdog/intel_scu_watchdog.c | 533 -------------------------- drivers/watchdog/intel_scu_watchdog.h | 50 --- 4 files changed, 593 deletions(-) delete mode 100644 drivers/watchdog/intel_scu_watchdog.c delete mode 100644 drivers/watchdog/intel_scu_watchdog.h diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig index 7ff941e71b79..6b9e93d8532b 100644 --- a/drivers/watchdog/Kconfig +++ b/drivers/watchdog/Kconfig @@ -1219,15 +1219,6 @@ config IE6XX_WDT To compile this driver as a module, choose M here: the module will be called ie6xx_wdt. -config INTEL_SCU_WATCHDOG - bool "Intel SCU Watchdog for Mobile Platforms" - depends on X86_INTEL_MID - help - Hardware driver for the watchdog time built into the Intel SCU - for Intel Mobile Platforms. - - To compile this driver as a module, choose M here. - config INTEL_MID_WATCHDOG tristate "Intel MID Watchdog Timer" depends on X86_INTEL_MID diff --git a/drivers/watchdog/Makefile b/drivers/watchdog/Makefile index 5c74ee19d441..74f61e4105d8 100644 --- a/drivers/watchdog/Makefile +++ b/drivers/watchdog/Makefile @@ -140,7 +140,6 @@ obj-$(CONFIG_W83877F_WDT) += w83877f_wdt.o obj-$(CONFIG_W83977F_WDT) += w83977f_wdt.o obj-$(CONFIG_MACHZ_WDT) += machzwd.o obj-$(CONFIG_SBC_EPX_C3_WATCHDOG) += sbc_epx_c3.o -obj-$(CONFIG_INTEL_SCU_WATCHDOG) += intel_scu_watchdog.o obj-$(CONFIG_INTEL_MID_WATCHDOG) += intel-mid_wdt.o obj-$(CONFIG_INTEL_MEI_WDT) += mei_wdt.o obj-$(CONFIG_NI903X_WDT) += ni903x_wdt.o diff --git a/drivers/watchdog/intel_scu_watchdog.c b/drivers/watchdog/intel_scu_watchdog.c deleted file mode 100644 index 804e35940983..000000000000 --- a/drivers/watchdog/intel_scu_watchdog.c +++ /dev/null @@ -1,533 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * Intel_SCU 0.2: An Intel SCU IOH Based Watchdog Device - * for Intel part #(s): - * - AF82MP20 PCH - * - * Copyright (C) 2009-2010 Intel Corporation. All rights reserved. - */ - -#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include "intel_scu_watchdog.h" - -/* Bounds number of times we will retry loading time count */ -/* This retry is a work around for a silicon bug. */ -#define MAX_RETRY 16 - -#define IPC_SET_WATCHDOG_TIMER 0xF8 - -static int timer_margin = DEFAULT_SOFT_TO_HARD_MARGIN; -module_param(timer_margin, int, 0); -MODULE_PARM_DESC(timer_margin, - "Watchdog timer margin" - "Time between interrupt and resetting the system" - "The range is from 1 to 160" - "This is the time for all keep alives to arrive"); - -static int timer_set = DEFAULT_TIME; -module_param(timer_set, int, 0); -MODULE_PARM_DESC(timer_set, - "Default Watchdog timer setting" - "Complete cycle time" - "The range is from 1 to 170" - "This is the time for all keep alives to arrive"); - -/* After watchdog device is closed, check force_boot. If: - * force_boot == 0, then force boot on next watchdog interrupt after close, - * force_boot == 1, then force boot immediately when device is closed. - */ -static int force_boot; -module_param(force_boot, int, 0); -MODULE_PARM_DESC(force_boot, - "A value of 1 means that the driver will reboot" - "the system immediately if the /dev/watchdog device is closed" - "A value of 0 means that when /dev/watchdog device is closed" - "the watchdog timer will be refreshed for one more interval" - "of length: timer_set. At the end of this interval, the" - "watchdog timer will reset the system." - ); - -/* there is only one device in the system now; this can be made into - * an array in the future if we have more than one device */ - -static struct intel_scu_watchdog_dev watchdog_device; - -/* Forces restart, if force_reboot is set */ -static void watchdog_fire(void) -{ - if (force_boot) { - pr_crit("Initiating system reboot\n"); - emergency_restart(); - pr_crit("Reboot didn't ?????\n"); - } - - else { - pr_crit("Immediate Reboot Disabled\n"); - pr_crit("System will reset when watchdog timer times out!\n"); - } -} - -static int check_timer_margin(int new_margin) -{ - if ((new_margin < MIN_TIME_CYCLE) || - (new_margin > MAX_TIME - timer_set)) { - pr_debug("value of new_margin %d is out of the range %d to %d\n", - new_margin, MIN_TIME_CYCLE, MAX_TIME - timer_set); - return -EINVAL; - } - return 0; -} - -/* - * IPC operations - */ -static int watchdog_set_ipc(int soft_threshold, int threshold) -{ - u32 *ipc_wbuf; - u8 cbuf[16] = { '\0' }; - int ipc_ret = 0; - - ipc_wbuf = (u32 *)&cbuf; - ipc_wbuf[0] = soft_threshold; - ipc_wbuf[1] = threshold; - - ipc_ret = intel_scu_ipc_command( - IPC_SET_WATCHDOG_TIMER, - 0, - ipc_wbuf, - 2, - NULL, - 0); - - if (ipc_ret != 0) - pr_err("Error setting SCU watchdog timer: %x\n", ipc_ret); - - return ipc_ret; -}; - -/* - * Intel_SCU operations - */ - -/* timer interrupt handler */ -static irqreturn_t watchdog_timer_interrupt(int irq, void *dev_id) -{ - int int_status; - int_status = ioread32(watchdog_device.timer_interrupt_status_addr); - - pr_debug("irq, int_status: %x\n", int_status); - - if (int_status != 0) - return IRQ_NONE; - - /* has the timer been started? If not, then this is spurious */ - if (watchdog_device.timer_started == 0) { - pr_debug("spurious interrupt received\n"); - return IRQ_HANDLED; - } - - /* temporarily disable the timer */ - iowrite32(0x00000002, watchdog_device.timer_control_addr); - - /* set the timer to the threshold */ - iowrite32(watchdog_device.threshold, - watchdog_device.timer_load_count_addr); - - /* allow the timer to run */ - iowrite32(0x00000003, watchdog_device.timer_control_addr); - - return IRQ_HANDLED; -} - -static int intel_scu_keepalive(void) -{ - - /* read eoi register - clears interrupt */ - ioread32(watchdog_device.timer_clear_interrupt_addr); - - /* temporarily disable the timer */ - iowrite32(0x00000002, watchdog_device.timer_control_addr); - - /* set the timer to the soft_threshold */ - iowrite32(watchdog_device.soft_threshold, - watchdog_device.timer_load_count_addr); - - /* allow the timer to run */ - iowrite32(0x00000003, watchdog_device.timer_control_addr); - - return 0; -} - -static int intel_scu_stop(void) -{ - iowrite32(0, watchdog_device.timer_control_addr); - return 0; -} - -static int intel_scu_set_heartbeat(u32 t) -{ - int ipc_ret; - int retry_count; - u32 soft_value; - u32 hw_value; - - watchdog_device.timer_set = t; - watchdog_device.threshold = - timer_margin * watchdog_device.timer_tbl_ptr->freq_hz; - watchdog_device.soft_threshold = - (watchdog_device.timer_set - timer_margin) - * watchdog_device.timer_tbl_ptr->freq_hz; - - pr_debug("set_heartbeat: timer freq is %d\n", - watchdog_device.timer_tbl_ptr->freq_hz); - pr_debug("set_heartbeat: timer_set is %x (hex)\n", - watchdog_device.timer_set); - pr_debug("set_heartbeat: timer_margin is %x (hex)\n", timer_margin); - pr_debug("set_heartbeat: threshold is %x (hex)\n", - watchdog_device.threshold); - pr_debug("set_heartbeat: soft_threshold is %x (hex)\n", - watchdog_device.soft_threshold); - - /* Adjust thresholds by FREQ_ADJUSTMENT factor, to make the */ - /* watchdog timing come out right. */ - watchdog_device.threshold = - watchdog_device.threshold / FREQ_ADJUSTMENT; - watchdog_device.soft_threshold = - watchdog_device.soft_threshold / FREQ_ADJUSTMENT; - - /* temporarily disable the timer */ - iowrite32(0x00000002, watchdog_device.timer_control_addr); - - /* send the threshold and soft_threshold via IPC to the processor */ - ipc_ret = watchdog_set_ipc(watchdog_device.soft_threshold, - watchdog_device.threshold); - - if (ipc_ret != 0) { - /* Make sure the watchdog timer is stopped */ - intel_scu_stop(); - return ipc_ret; - } - - /* Soft Threshold set loop. Early versions of silicon did */ - /* not always set this count correctly. This loop checks */ - /* the value and retries if it was not set correctly. */ - - retry_count = 0; - soft_value = watchdog_device.soft_threshold & 0xFFFF0000; - do { - - /* Make sure timer is stopped */ - intel_scu_stop(); - - if (MAX_RETRY < retry_count++) { - /* Unable to set timer value */ - pr_err("Unable to set timer\n"); - return -ENODEV; - } - - /* set the timer to the soft threshold */ - iowrite32(watchdog_device.soft_threshold, - watchdog_device.timer_load_count_addr); - - /* read count value before starting timer */ - ioread32(watchdog_device.timer_load_count_addr); - - /* Start the timer */ - iowrite32(0x00000003, watchdog_device.timer_control_addr); - - /* read the value the time loaded into its count reg */ - hw_value = ioread32(watchdog_device.timer_load_count_addr); - hw_value = hw_value & 0xFFFF0000; - - - } while (soft_value != hw_value); - - watchdog_device.timer_started = 1; - - return 0; -} - -/* - * /dev/watchdog handling - */ - -static int intel_scu_open(struct inode *inode, struct file *file) -{ - - /* Set flag to indicate that watchdog device is open */ - if (test_and_set_bit(0, &watchdog_device.driver_open)) - return -EBUSY; - - /* Check for reopen of driver. Reopens are not allowed */ - if (watchdog_device.driver_closed) - return -EPERM; - - return stream_open(inode, file); -} - -static int intel_scu_release(struct inode *inode, struct file *file) -{ - /* - * This watchdog should not be closed, after the timer - * is started with the WDIPC_SETTIMEOUT ioctl - * If force_boot is set watchdog_fire() will cause an - * immediate reset. If force_boot is not set, the watchdog - * timer is refreshed for one more interval. At the end - * of that interval, the watchdog timer will reset the system. - */ - - if (!test_and_clear_bit(0, &watchdog_device.driver_open)) { - pr_debug("intel_scu_release, without open\n"); - return -ENOTTY; - } - - if (!watchdog_device.timer_started) { - /* Just close, since timer has not been started */ - pr_debug("closed, without starting timer\n"); - return 0; - } - - pr_crit("Unexpected close of /dev/watchdog!\n"); - - /* Since the timer was started, prevent future reopens */ - watchdog_device.driver_closed = 1; - - /* Refresh the timer for one more interval */ - intel_scu_keepalive(); - - /* Reboot system (if force_boot is set) */ - watchdog_fire(); - - /* We should only reach this point if force_boot is not set */ - return 0; -} - -static ssize_t intel_scu_write(struct file *file, - char const *data, - size_t len, - loff_t *ppos) -{ - - if (watchdog_device.timer_started) - /* Watchdog already started, keep it alive */ - intel_scu_keepalive(); - else - /* Start watchdog with timer value set by init */ - intel_scu_set_heartbeat(watchdog_device.timer_set); - - return len; -} - -static long intel_scu_ioctl(struct file *file, - unsigned int cmd, - unsigned long arg) -{ - void __user *argp = (void __user *)arg; - u32 __user *p = argp; - u32 new_margin; - - - static const struct watchdog_info ident = { - .options = WDIOF_SETTIMEOUT - | WDIOF_KEEPALIVEPING, - .firmware_version = 0, /* @todo Get from SCU via - ipc_get_scu_fw_version()? */ - .identity = "Intel_SCU IOH Watchdog" /* len < 32 */ - }; - - switch (cmd) { - case WDIOC_GETSUPPORT: - return copy_to_user(argp, - &ident, - sizeof(ident)) ? -EFAULT : 0; - case WDIOC_GETSTATUS: - case WDIOC_GETBOOTSTATUS: - return put_user(0, p); - case WDIOC_KEEPALIVE: - intel_scu_keepalive(); - - return 0; - case WDIOC_SETTIMEOUT: - if (get_user(new_margin, p)) - return -EFAULT; - - if (check_timer_margin(new_margin)) - return -EINVAL; - - if (intel_scu_set_heartbeat(new_margin)) - return -EINVAL; - return 0; - case WDIOC_GETTIMEOUT: - return put_user(watchdog_device.soft_threshold, p); - - default: - return -ENOTTY; - } -} - -/* - * Notifier for system down - */ -static int intel_scu_notify_sys(struct notifier_block *this, - unsigned long code, - void *another_unused) -{ - if (code == SYS_DOWN || code == SYS_HALT) - /* Turn off the watchdog timer. */ - intel_scu_stop(); - return NOTIFY_DONE; -} - -/* - * Kernel Interfaces - */ -static const struct file_operations intel_scu_fops = { - .owner = THIS_MODULE, - .llseek = no_llseek, - .write = intel_scu_write, - .unlocked_ioctl = intel_scu_ioctl, - .compat_ioctl = compat_ptr_ioctl, - .open = intel_scu_open, - .release = intel_scu_release, -}; - -static int __init intel_scu_watchdog_init(void) -{ - int ret; - u32 __iomem *tmp_addr; - - /* - * We don't really need to check this as the SFI timer get will fail - * but if we do so we can exit with a clearer reason and no noise. - * - * If it isn't an intel MID device then it doesn't have this watchdog - */ - if (!intel_mid_identify_cpu()) - return -ENODEV; - - /* Check boot parameters to verify that their initial values */ - /* are in range. */ - /* Check value of timer_set boot parameter */ - if ((timer_set < MIN_TIME_CYCLE) || - (timer_set > MAX_TIME - MIN_TIME_CYCLE)) { - pr_err("value of timer_set %x (hex) is out of range from %x to %x (hex)\n", - timer_set, MIN_TIME_CYCLE, MAX_TIME - MIN_TIME_CYCLE); - return -EINVAL; - } - - /* Check value of timer_margin boot parameter */ - if (check_timer_margin(timer_margin)) - return -EINVAL; - - watchdog_device.timer_tbl_ptr = sfi_get_mtmr(sfi_mtimer_num-1); - - if (watchdog_device.timer_tbl_ptr == NULL) { - pr_debug("timer is not available\n"); - return -ENODEV; - } - /* make sure the timer exists */ - if (watchdog_device.timer_tbl_ptr->phys_addr == 0) { - pr_debug("timer %d does not have valid physical memory\n", - sfi_mtimer_num); - return -ENODEV; - } - - if (watchdog_device.timer_tbl_ptr->irq == 0) { - pr_debug("timer %d invalid irq\n", sfi_mtimer_num); - return -ENODEV; - } - - tmp_addr = ioremap(watchdog_device.timer_tbl_ptr->phys_addr, - 20); - - if (tmp_addr == NULL) { - pr_debug("timer unable to ioremap\n"); - return -ENOMEM; - } - - watchdog_device.timer_load_count_addr = tmp_addr++; - watchdog_device.timer_current_value_addr = tmp_addr++; - watchdog_device.timer_control_addr = tmp_addr++; - watchdog_device.timer_clear_interrupt_addr = tmp_addr++; - watchdog_device.timer_interrupt_status_addr = tmp_addr++; - - /* Set the default time values in device structure */ - - watchdog_device.timer_set = timer_set; - watchdog_device.threshold = - timer_margin * watchdog_device.timer_tbl_ptr->freq_hz; - watchdog_device.soft_threshold = - (watchdog_device.timer_set - timer_margin) - * watchdog_device.timer_tbl_ptr->freq_hz; - - - watchdog_device.intel_scu_notifier.notifier_call = - intel_scu_notify_sys; - - ret = register_reboot_notifier(&watchdog_device.intel_scu_notifier); - if (ret) { - pr_err("cannot register notifier %d)\n", ret); - goto register_reboot_error; - } - - watchdog_device.miscdev.minor = WATCHDOG_MINOR; - watchdog_device.miscdev.name = "watchdog"; - watchdog_device.miscdev.fops = &intel_scu_fops; - - ret = misc_register(&watchdog_device.miscdev); - if (ret) { - pr_err("cannot register miscdev %d err =%d\n", - WATCHDOG_MINOR, ret); - goto misc_register_error; - } - - ret = request_irq((unsigned int)watchdog_device.timer_tbl_ptr->irq, - watchdog_timer_interrupt, - IRQF_SHARED, "watchdog", - &watchdog_device.timer_load_count_addr); - if (ret) { - pr_err("error requesting irq %d\n", ret); - goto request_irq_error; - } - /* Make sure timer is disabled before returning */ - intel_scu_stop(); - return 0; - -/* error cleanup */ - -request_irq_error: - misc_deregister(&watchdog_device.miscdev); -misc_register_error: - unregister_reboot_notifier(&watchdog_device.intel_scu_notifier); -register_reboot_error: - intel_scu_stop(); - iounmap(watchdog_device.timer_load_count_addr); - return ret; -} -late_initcall(intel_scu_watchdog_init); diff --git a/drivers/watchdog/intel_scu_watchdog.h b/drivers/watchdog/intel_scu_watchdog.h deleted file mode 100644 index fb12a25ee417..000000000000 --- a/drivers/watchdog/intel_scu_watchdog.h +++ /dev/null @@ -1,50 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0-only */ -/* - * Intel_SCU 0.2: An Intel SCU IOH Based Watchdog Device - * for Intel part #(s): - * - AF82MP20 PCH - * - * Copyright (C) 2009-2010 Intel Corporation. All rights reserved. - */ - -#ifndef __INTEL_SCU_WATCHDOG_H -#define __INTEL_SCU_WATCHDOG_H - -#define WDT_VER "0.3" - -/* minimum time between interrupts */ -#define MIN_TIME_CYCLE 1 - -/* Time from warning to reboot is 2 seconds */ -#define DEFAULT_SOFT_TO_HARD_MARGIN 2 - -#define MAX_TIME 170 - -#define DEFAULT_TIME 5 - -#define MAX_SOFT_TO_HARD_MARGIN (MAX_TIME-MIN_TIME_CYCLE) - -/* Ajustment to clock tick frequency to make timing come out right */ -#define FREQ_ADJUSTMENT 8 - -struct intel_scu_watchdog_dev { - ulong driver_open; - ulong driver_closed; - u32 timer_started; - u32 timer_set; - u32 threshold; - u32 soft_threshold; - u32 __iomem *timer_load_count_addr; - u32 __iomem *timer_current_value_addr; - u32 __iomem *timer_control_addr; - u32 __iomem *timer_clear_interrupt_addr; - u32 __iomem *timer_interrupt_status_addr; - struct sfi_timer_table_entry *timer_tbl_ptr; - struct notifier_block intel_scu_notifier; - struct miscdevice miscdev; -}; - -extern int sfi_mtimer_num; - -/* extern struct sfi_timer_table_entry *sfi_get_mtmr(int hint); */ -#endif /* __INTEL_SCU_WATCHDOG_H */ From patchwork Fri Jan 22 12:31:58 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andy Shevchenko X-Patchwork-Id: 12039307 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C7B87C433E0 for ; Fri, 22 Jan 2021 12:35:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8127A23437 for ; Fri, 22 Jan 2021 12:35:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727970AbhAVMfO (ORCPT ); Fri, 22 Jan 2021 07:35:14 -0500 Received: from mga12.intel.com ([192.55.52.136]:11230 "EHLO mga12.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728156AbhAVMek (ORCPT ); Fri, 22 Jan 2021 07:34:40 -0500 IronPort-SDR: 0ty8CsPaFZLWcDRDaGuoC3XNIwN7XH2/Nb/Ors1JlzyzKAGbKM+iBfGtAmhljHv9zQbkXUiplU z6ip9VSUDp4Q== X-IronPort-AV: E=McAfee;i="6000,8403,9871"; a="158617608" X-IronPort-AV: E=Sophos;i="5.79,366,1602572400"; d="scan'208";a="158617608" Received: from orsmga003.jf.intel.com ([10.7.209.27]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Jan 2021 04:32:07 -0800 IronPort-SDR: BrIzskPsl6Sg9+MjqpUaQLYlI3dmaMvKvn4C6ItAeijJRYhnW8X+MhR5NQdzbrUOGkeI3PlAkR DDH06W3KNUmA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.79,366,1602572400"; d="scan'208";a="351883204" Received: from black.fi.intel.com ([10.237.72.28]) by orsmga003.jf.intel.com with ESMTP; 22 Jan 2021 04:32:03 -0800 Received: by black.fi.intel.com (Postfix, from userid 1003) id D1B5212A; Fri, 22 Jan 2021 14:32:02 +0200 (EET) From: Andy Shevchenko To: Thomas Gleixner , Ingo Molnar , Borislav Petkov , x86@kernel.org, "H. Peter Anvin" , platform-driver-x86@vger.kernel.org, Mark Gross , linux-watchdog@vger.kernel.org, Wim Van Sebroeck , Guenter Roeck Cc: Andy Shevchenko , Linus Walleij , Mika Westerberg Subject: [PATCH v1 2/5] watchdog: intel-mid_wdt: Postpone IRQ handler registration till SCU is ready Date: Fri, 22 Jan 2021 14:31:58 +0200 Message-Id: <20210122123201.40935-2-andriy.shevchenko@linux.intel.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210122123201.40935-1-andriy.shevchenko@linux.intel.com> References: <20210122123201.40935-1-andriy.shevchenko@linux.intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-watchdog@vger.kernel.org When SCU is not ready and CONFIG_DEBUG_SHIRQ=y we got deferred probe followed by fired test IRQ which immediately makes kernel panic. Fix this by delaying IRQ handler registration till SCU is ready. Fixes: 80ae679b8f86 ("watchdog: intel-mid_wdt: Convert to use new SCU IPC API") Signed-off-by: Andy Shevchenko Acked-by: Linus Walleij Reviewed-by: Mika Westerberg Reviewed-by: Guenter Roeck --- drivers/watchdog/intel-mid_wdt.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/watchdog/intel-mid_wdt.c b/drivers/watchdog/intel-mid_wdt.c index 1ae03b64ef8b..9b2173f765c8 100644 --- a/drivers/watchdog/intel-mid_wdt.c +++ b/drivers/watchdog/intel-mid_wdt.c @@ -154,6 +154,10 @@ static int mid_wdt_probe(struct platform_device *pdev) watchdog_set_nowayout(wdt_dev, WATCHDOG_NOWAYOUT); watchdog_set_drvdata(wdt_dev, mid); + mid->scu = devm_intel_scu_ipc_dev_get(dev); + if (!mid->scu) + return -EPROBE_DEFER; + ret = devm_request_irq(dev, pdata->irq, mid_wdt_irq, IRQF_SHARED | IRQF_NO_SUSPEND, "watchdog", wdt_dev); @@ -162,10 +166,6 @@ static int mid_wdt_probe(struct platform_device *pdev) return ret; } - mid->scu = devm_intel_scu_ipc_dev_get(dev); - if (!mid->scu) - return -EPROBE_DEFER; - /* * The firmware followed by U-Boot leaves the watchdog running * with the default threshold which may vary. When we get here From patchwork Fri Jan 22 12:31:59 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andy Shevchenko X-Patchwork-Id: 12039311 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 509DFC433DB for ; Fri, 22 Jan 2021 12:35:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 168C123437 for ; Fri, 22 Jan 2021 12:35:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727836AbhAVMf3 (ORCPT ); Fri, 22 Jan 2021 07:35:29 -0500 Received: from mga17.intel.com ([192.55.52.151]:29875 "EHLO mga17.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728163AbhAVMek (ORCPT ); Fri, 22 Jan 2021 07:34:40 -0500 IronPort-SDR: UWyrYAe9cVfteAjOGoFIRTxAzfXPSrf2LXckZabW3jECNIKEjBg1R6kWi4Nu8SYs3E5Lh/H+dn w+Fgp6Rpg72g== X-IronPort-AV: E=McAfee;i="6000,8403,9871"; a="159215182" X-IronPort-AV: E=Sophos;i="5.79,366,1602572400"; d="scan'208";a="159215182" Received: from orsmga004.jf.intel.com ([10.7.209.38]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Jan 2021 04:32:10 -0800 IronPort-SDR: fBWwz4/TQn3AU0gOR3qy32EiYufk0LQqI/n+UXh2WdzeqJCBKNGkX/wfrMEYgKX0mYiiPx36TV MPtgGi1p9mqA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.79,366,1602572400"; d="scan'208";a="502715177" Received: from black.fi.intel.com ([10.237.72.28]) by orsmga004.jf.intel.com with ESMTP; 22 Jan 2021 04:32:03 -0800 Received: by black.fi.intel.com (Postfix, from userid 1003) id D9316161; Fri, 22 Jan 2021 14:32:02 +0200 (EET) From: Andy Shevchenko To: Thomas Gleixner , Ingo Molnar , Borislav Petkov , x86@kernel.org, "H. Peter Anvin" , platform-driver-x86@vger.kernel.org, Mark Gross , linux-watchdog@vger.kernel.org, Wim Van Sebroeck , Guenter Roeck Cc: Andy Shevchenko , Hans de Goede , Linus Walleij Subject: [PATCH v1 3/5] platform/x86: intel_scu_wdt: Move driver from arch/x86 Date: Fri, 22 Jan 2021 14:31:59 +0200 Message-Id: <20210122123201.40935-3-andriy.shevchenko@linux.intel.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210122123201.40935-1-andriy.shevchenko@linux.intel.com> References: <20210122123201.40935-1-andriy.shevchenko@linux.intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-watchdog@vger.kernel.org The ACPI-enabled Intel MID platforms neither have WDAT table nor proper IDs to instantiate watchdog device. In order to keep them working move the board code from arch/x86 to drivers/platform/x86. Note, the complete SFI support is going to be removed, that's why PDx86 has been chosen as a new home for it. This is the only device which needs additional code so far. Signed-off-by: Andy Shevchenko Reviewed-by: Hans de Goede Acked-by: Linus Walleij Reviewed-by: Guenter Roeck --- arch/x86/platform/intel-mid/device_libs/Makefile | 1 - drivers/platform/x86/Kconfig | 8 ++++++++ drivers/platform/x86/Makefile | 1 + .../platform/x86/intel_scu_wdt.c | 0 4 files changed, 9 insertions(+), 1 deletion(-) rename arch/x86/platform/intel-mid/device_libs/platform_mrfld_wdt.c => drivers/platform/x86/intel_scu_wdt.c (100%) diff --git a/arch/x86/platform/intel-mid/device_libs/Makefile b/arch/x86/platform/intel-mid/device_libs/Makefile index 480fed21cc7d..918edac9ab9a 100644 --- a/arch/x86/platform/intel-mid/device_libs/Makefile +++ b/arch/x86/platform/intel-mid/device_libs/Makefile @@ -30,4 +30,3 @@ obj-$(subst m,y,$(CONFIG_GPIO_PCA953X)) += platform_tca6416.o obj-$(subst m,y,$(CONFIG_KEYBOARD_GPIO)) += platform_gpio_keys.o obj-$(subst m,y,$(CONFIG_INTEL_MID_POWER_BUTTON)) += platform_mrfld_power_btn.o obj-$(subst m,y,$(CONFIG_RTC_DRV_CMOS)) += platform_mrfld_rtc.o -obj-$(subst m,y,$(CONFIG_INTEL_MID_WATCHDOG)) += platform_mrfld_wdt.o diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig index 4a5798a0ce0c..0bb85eabace1 100644 --- a/drivers/platform/x86/Kconfig +++ b/drivers/platform/x86/Kconfig @@ -1424,6 +1424,14 @@ config INTEL_SCU_PLATFORM and SCU (sometimes called PMC as well). The driver currently supports Intel Elkhart Lake and compatible platforms. +config INTEL_SCU_WDT + bool + default INTEL_SCU_PCI + depends on INTEL_MID_WATCHDOG + help + This is a specific platform code to instantiate watchdog device + on ACPI-based Intel MID platforms. + config INTEL_SCU_IPC_UTIL tristate "Intel SCU IPC utility driver" depends on INTEL_SCU diff --git a/drivers/platform/x86/Makefile b/drivers/platform/x86/Makefile index 728ccc226a29..19306450d791 100644 --- a/drivers/platform/x86/Makefile +++ b/drivers/platform/x86/Makefile @@ -146,6 +146,7 @@ obj-$(CONFIG_INTEL_PUNIT_IPC) += intel_punit_ipc.o obj-$(CONFIG_INTEL_SCU_IPC) += intel_scu_ipc.o obj-$(CONFIG_INTEL_SCU_PCI) += intel_scu_pcidrv.o obj-$(CONFIG_INTEL_SCU_PLATFORM) += intel_scu_pltdrv.o +obj-$(CONFIG_INTEL_SCU_WDT) += intel_scu_wdt.o obj-$(CONFIG_INTEL_SCU_IPC_UTIL) += intel_scu_ipcutil.o obj-$(CONFIG_INTEL_TELEMETRY) += intel_telemetry_core.o \ intel_telemetry_pltdrv.o \ diff --git a/arch/x86/platform/intel-mid/device_libs/platform_mrfld_wdt.c b/drivers/platform/x86/intel_scu_wdt.c similarity index 100% rename from arch/x86/platform/intel-mid/device_libs/platform_mrfld_wdt.c rename to drivers/platform/x86/intel_scu_wdt.c From patchwork Fri Jan 22 12:32:00 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andy Shevchenko X-Patchwork-Id: 12039313 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 19A5EC433E6 for ; Fri, 22 Jan 2021 12:35:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B9F8A23437 for ; Fri, 22 Jan 2021 12:35:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728176AbhAVMfg (ORCPT ); Fri, 22 Jan 2021 07:35:36 -0500 Received: from mga14.intel.com ([192.55.52.115]:29472 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728159AbhAVMek (ORCPT ); Fri, 22 Jan 2021 07:34:40 -0500 IronPort-SDR: IM2ELx6Ijke34ySPI0Qmfn8qV7zd8S2C81VH+rGGffFb/mWCTE473sEFcC6Ut/iWBHAOYLb2dO Nowr2KOHTMHQ== X-IronPort-AV: E=McAfee;i="6000,8403,9871"; a="178661020" X-IronPort-AV: E=Sophos;i="5.79,366,1602572400"; d="scan'208";a="178661020" Received: from orsmga006.jf.intel.com ([10.7.209.51]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Jan 2021 04:32:10 -0800 IronPort-SDR: Wh3rkhMZP+YbZBcmjyEVRU8Txx6FDyJbuPNdBg7uhBs7dltk1l2P+qib5BV6QU8uE6n+/2zpk4 V46bSMzUWypg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.79,366,1602572400"; d="scan'208";a="355224168" Received: from black.fi.intel.com ([10.237.72.28]) by orsmga006.jf.intel.com with ESMTP; 22 Jan 2021 04:32:03 -0800 Received: by black.fi.intel.com (Postfix, from userid 1003) id E5BB629A; Fri, 22 Jan 2021 14:32:02 +0200 (EET) From: Andy Shevchenko To: Thomas Gleixner , Ingo Molnar , Borislav Petkov , x86@kernel.org, "H. Peter Anvin" , platform-driver-x86@vger.kernel.org, Mark Gross , linux-watchdog@vger.kernel.org, Wim Van Sebroeck , Guenter Roeck Cc: Andy Shevchenko , Hans de Goede , Linus Walleij Subject: [PATCH v1 4/5] platform/x86: intel_scu_wdt: Drop SCU notification Date: Fri, 22 Jan 2021 14:32:00 +0200 Message-Id: <20210122123201.40935-4-andriy.shevchenko@linux.intel.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210122123201.40935-1-andriy.shevchenko@linux.intel.com> References: <20210122123201.40935-1-andriy.shevchenko@linux.intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-watchdog@vger.kernel.org Since SCU code along with the Intel MID watchdog driver has been refactored in a way that latter will be probed only after the former has been come to live, the notification code is bogus and not needed. Remove it for good. Signed-off-by: Andy Shevchenko Reviewed-by: Hans de Goede Acked-by: Linus Walleij Reviewed-by: Guenter Roeck --- drivers/platform/x86/intel_scu_wdt.c | 31 +++++++--------------------- 1 file changed, 7 insertions(+), 24 deletions(-) diff --git a/drivers/platform/x86/intel_scu_wdt.c b/drivers/platform/x86/intel_scu_wdt.c index 227218a8f98e..19f7686a3c19 100644 --- a/drivers/platform/x86/intel_scu_wdt.c +++ b/drivers/platform/x86/intel_scu_wdt.c @@ -12,7 +12,6 @@ #include #include -#include #include #include @@ -49,34 +48,18 @@ static struct intel_mid_wdt_pdata tangier_pdata = { .probe = tangier_probe, }; -static int wdt_scu_status_change(struct notifier_block *nb, - unsigned long code, void *data) -{ - if (code == SCU_DOWN) { - platform_device_unregister(&wdt_dev); - return 0; - } - - return platform_device_register(&wdt_dev); -} - -static struct notifier_block wdt_scu_notifier = { - .notifier_call = wdt_scu_status_change, -}; - static int __init register_mid_wdt(void) { if (intel_mid_identify_cpu() != INTEL_MID_CPU_CHIP_TANGIER) return -ENODEV; wdt_dev.dev.platform_data = &tangier_pdata; - - /* - * We need to be sure that the SCU IPC is ready before watchdog device - * can be registered: - */ - intel_scu_notifier_add(&wdt_scu_notifier); - - return 0; + return platform_device_register(&wdt_dev); } arch_initcall(register_mid_wdt); + +static void __exit unregister_mid_wdt(void) +{ + platform_device_unregister(&wdt_dev); +} +__exitcall(unregister_mid_wdt); From patchwork Fri Jan 22 12:32:01 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andy Shevchenko X-Patchwork-Id: 12039357 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C3AEDC433DB for ; Fri, 22 Jan 2021 12:36:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 826CB22DBF for ; Fri, 22 Jan 2021 12:36:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727512AbhAVMgY (ORCPT ); Fri, 22 Jan 2021 07:36:24 -0500 Received: from mga03.intel.com ([134.134.136.65]:46880 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726070AbhAVMgV (ORCPT ); Fri, 22 Jan 2021 07:36:21 -0500 IronPort-SDR: oPvKUszGKpxbFzhKRnMa6JevMT9BdLydL66FK1Az/q5AyP5nZQr4Mcoy9fK+Tx3IUVPgSjFavA 7+f9TGmtEmHw== X-IronPort-AV: E=McAfee;i="6000,8403,9871"; a="179520249" X-IronPort-AV: E=Sophos;i="5.79,366,1602572400"; d="scan'208";a="179520249" Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Jan 2021 04:32:10 -0800 IronPort-SDR: Ea6ik9Gc4H7LH9R5b9hXa26KKnqIIPOuAEalN/ILPjiPE/d/fh+SqBoSHhsjWf9IAymdOKczUc lmvhafBVERhQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.79,366,1602572400"; d="scan'208";a="427955916" Received: from black.fi.intel.com ([10.237.72.28]) by orsmga001.jf.intel.com with ESMTP; 22 Jan 2021 04:32:03 -0800 Received: by black.fi.intel.com (Postfix, from userid 1003) id EF1C832E; Fri, 22 Jan 2021 14:32:02 +0200 (EET) From: Andy Shevchenko To: Thomas Gleixner , Ingo Molnar , Borislav Petkov , x86@kernel.org, "H. Peter Anvin" , platform-driver-x86@vger.kernel.org, Mark Gross , linux-watchdog@vger.kernel.org, Wim Van Sebroeck , Guenter Roeck Cc: Andy Shevchenko Subject: [PATCH v1 5/5] platform/x86: intel_scu_wdt: Get rid of custom x86 model comparison Date: Fri, 22 Jan 2021 14:32:01 +0200 Message-Id: <20210122123201.40935-5-andriy.shevchenko@linux.intel.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210122123201.40935-1-andriy.shevchenko@linux.intel.com> References: <20210122123201.40935-1-andriy.shevchenko@linux.intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-watchdog@vger.kernel.org Switch the platform code to use x86_id_table and accompanying API instead of custom comparison against x86 CPU model. This is one of the last users of custom API for that and following changes will remove it for the good. Signed-off-by: Andy Shevchenko Reviewed-by: Guenter Roeck --- drivers/platform/x86/intel_scu_wdt.c | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) diff --git a/drivers/platform/x86/intel_scu_wdt.c b/drivers/platform/x86/intel_scu_wdt.c index 19f7686a3c19..85ee85ca2215 100644 --- a/drivers/platform/x86/intel_scu_wdt.c +++ b/drivers/platform/x86/intel_scu_wdt.c @@ -11,6 +11,8 @@ #include #include +#include +#include #include #include #include @@ -48,12 +50,20 @@ static struct intel_mid_wdt_pdata tangier_pdata = { .probe = tangier_probe, }; +static const struct x86_cpu_id intel_mid_cpu_ids[] = { + X86_MATCH_INTEL_FAM6_MODEL(ATOM_SILVERMONT_MID, &tangier_pdata), + {} +}; + static int __init register_mid_wdt(void) { - if (intel_mid_identify_cpu() != INTEL_MID_CPU_CHIP_TANGIER) + const struct x86_cpu_id *id; + + id = x86_match_cpu(intel_mid_cpu_ids); + if (!id) return -ENODEV; - wdt_dev.dev.platform_data = &tangier_pdata; + wdt_dev.dev.platform_data = (const struct intel_mid_wdt_pdata *)id->driver_data; return platform_device_register(&wdt_dev); } arch_initcall(register_mid_wdt);