| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| 585 | 77.48% | 2 | 16.67% | |
| 109 | 14.44% | 1 | 8.33% | |
| 34 | 4.50% | 4 | 33.33% | |
| 14 | 1.85% | 2 | 16.67% | |
| 6 | 0.79% | 1 | 8.33% | |
| 5 | 0.66% | 1 | 8.33% | |
| 2 | 0.26% | 1 | 8.33% | |
| Total | 755 | 12 |
| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| David Cohen | 585 | 77.48% | 2 | 16.67% |
| Mika Westerberg | 109 | 14.44% | 1 | 8.33% |
| Andy Shevchenko | 34 | 4.50% | 4 | 33.33% |
| Guenter Roeck | 14 | 1.85% | 2 | 16.67% |
| Pratyush Anand | 6 | 0.79% | 1 | 8.33% |
| Raag Jadav | 5 | 0.66% | 1 | 8.33% |
| Thomas Gleixner | 2 | 0.26% | 1 | 8.33% |
| Total | 755 | 12 |
// SPDX-License-Identifier: GPL-2.0-only /* * intel-mid_wdt: generic Intel MID SCU watchdog driver * * Platforms supported so far: * - Merrifield only * * Copyright (C) 2014 Intel Corporation. All rights reserved. * Contact: David Cohen <david.a.cohen@linux.intel.com> */ #include <linux/interrupt.h> #include <linux/module.h> #include <linux/nmi.h> #include <linux/platform_device.h> #include <linux/watchdog.h> #include <linux/platform_data/intel-mid_wdt.h> #include <asm/intel_scu_ipc.h> #include <asm/intel-mid.h> #define IPC_WATCHDOG 0xf8 #define MID_WDT_PRETIMEOUT 15 #define MID_WDT_TIMEOUT_MIN (1 + MID_WDT_PRETIMEOUT) #define MID_WDT_TIMEOUT_MAX 170 #define MID_WDT_DEFAULT_TIMEOUT 90 /* SCU watchdog messages */ enum { SCU_WATCHDOG_START = 0, SCU_WATCHDOG_STOP, SCU_WATCHDOG_KEEPALIVE, }; struct mid_wdt { struct watchdog_device wd; struct device *dev; struct intel_scu_ipc_dev *scu; }; static inline int wdt_command(struct mid_wdt *mid, int sub, const void *in, size_t inlen, size_t size) { struct intel_scu_ipc_dev *scu = mid->scu; return intel_scu_ipc_dev_command_with_size(scu, IPC_WATCHDOG, sub, in, inlen, size, NULL, 0); } static int wdt_start(struct watchdog_device *wd) { struct mid_wdt *mid = watchdog_get_drvdata(wd); int ret, in_size; int timeout = wd->timeout; struct ipc_wd_start { u32 pretimeout; u32 timeout; } ipc_wd_start = { timeout - MID_WDT_PRETIMEOUT, timeout }; /* * SCU expects the input size for watchdog IPC to be 2 which is the * size of the structure in dwords. SCU IPC normally takes bytes * but this is a special case where we specify size to be different * than inlen. */ in_size = DIV_ROUND_UP(sizeof(ipc_wd_start), 4); ret = wdt_command(mid, SCU_WATCHDOG_START, &ipc_wd_start, sizeof(ipc_wd_start), in_size); if (ret) dev_crit(mid->dev, "error starting watchdog: %d\n", ret); return ret; } static int wdt_ping(struct watchdog_device *wd) { struct mid_wdt *mid = watchdog_get_drvdata(wd); int ret; ret = wdt_command(mid, SCU_WATCHDOG_KEEPALIVE, NULL, 0, 0); if (ret) dev_crit(mid->dev, "Error executing keepalive: %d\n", ret); return ret; } static int wdt_stop(struct watchdog_device *wd) { struct mid_wdt *mid = watchdog_get_drvdata(wd); int ret; ret = wdt_command(mid, SCU_WATCHDOG_STOP, NULL, 0, 0); if (ret) dev_crit(mid->dev, "Error stopping watchdog: %d\n", ret); return ret; } static irqreturn_t mid_wdt_irq(int irq, void *dev_id) { panic("Kernel Watchdog"); /* This code should not be reached */ return IRQ_HANDLED; } static const struct watchdog_info mid_wdt_info = { .identity = "Intel MID SCU watchdog", .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE, }; static const struct watchdog_ops mid_wdt_ops = { .owner = THIS_MODULE, .start = wdt_start, .stop = wdt_stop, .ping = wdt_ping, }; static int mid_wdt_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct watchdog_device *wdt_dev; struct intel_mid_wdt_pdata *pdata = dev->platform_data; struct mid_wdt *mid; int ret; if (!pdata) { dev_err(dev, "missing platform data\n"); return -EINVAL; } if (pdata->probe) { ret = pdata->probe(pdev); if (ret) return ret; } mid = devm_kzalloc(dev, sizeof(*mid), GFP_KERNEL); if (!mid) return -ENOMEM; mid->dev = dev; wdt_dev = &mid->wd; wdt_dev->info = &mid_wdt_info; wdt_dev->ops = &mid_wdt_ops; wdt_dev->min_timeout = MID_WDT_TIMEOUT_MIN; wdt_dev->max_timeout = MID_WDT_TIMEOUT_MAX; wdt_dev->timeout = MID_WDT_DEFAULT_TIMEOUT; wdt_dev->parent = dev; 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); if (ret) { dev_err(dev, "error requesting warning irq %d\n", pdata->irq); return ret; } /* * The firmware followed by U-Boot leaves the watchdog running * with the default threshold which may vary. When we get here * we should make a decision to prevent any side effects before * user space daemon will take care of it. The best option, * taking into consideration that there is no way to read values * back from hardware, is to enforce watchdog being run with * deterministic values. */ ret = wdt_start(wdt_dev); if (ret) return ret; /* Make sure the watchdog is serviced */ set_bit(WDOG_HW_RUNNING, &wdt_dev->status); ret = devm_watchdog_register_device(dev, wdt_dev); if (ret) return ret; dev_info(dev, "Intel MID watchdog device probed\n"); return 0; } static struct platform_driver mid_wdt_driver = { .probe = mid_wdt_probe, .driver = { .name = "intel_mid_wdt", }, }; module_platform_driver(mid_wdt_driver); MODULE_AUTHOR("David Cohen <david.a.cohen@linux.intel.com>"); MODULE_DESCRIPTION("Watchdog Driver for Intel MID platform"); MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:intel_mid_wdt");