/* * Copyright (c) 2016 Yang Ling * * 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 #include #include #include #include #define DEFAULT_HEARTBEAT 30 static bool nowayout = WATCHDOG_NOWAYOUT; module_param(nowayout, bool, 0444); static unsigned int heartbeat; module_param(heartbeat, uint, 0444); struct ls1x_wdt_drvdata { void __iomem *base; struct clk *clk; unsigned long clk_rate; struct watchdog_device wdt; }; static int ls1x_wdt_ping(struct watchdog_device *wdt_dev) { struct ls1x_wdt_drvdata *drvdata = watchdog_get_drvdata(wdt_dev); writel(0x1, drvdata->base + WDT_SET); return 0; } static int ls1x_wdt_set_timeout(struct watchdog_device *wdt_dev, unsigned int timeout) { struct ls1x_wdt_drvdata *drvdata = watchdog_get_drvdata(wdt_dev); unsigned int max_hw_heartbeat = wdt_dev->max_hw_heartbeat_ms / 1000; unsigned int counts; wdt_dev->timeout = timeout; counts = drvdata->clk_rate * min(timeout, max_hw_heartbeat); writel(counts, drvdata->base + WDT_TIMER); return 0; } static int ls1x_wdt_start(struct watchdog_device *wdt_dev) { struct ls1x_wdt_drvdata *drvdata = watchdog_get_drvdata(wdt_dev); writel(0x1, drvdata->base + WDT_EN); return 0; } static int ls1x_wdt_stop(struct watchdog_device *wdt_dev) { struct ls1x_wdt_drvdata *drvdata = watchdog_get_drvdata(wdt_dev); writel(0x0, drvdata->base + WDT_EN); return 0; } static const struct watchdog_info ls1x_wdt_info = { .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE, .identity = "Loongson1 Watchdog", }; static const struct watchdog_ops ls1x_wdt_ops = { .owner = THIS_MODULE, .start = ls1x_wdt_start, .stop = ls1x_wdt_stop, .ping = ls1x_wdt_ping, .set_timeout = ls1x_wdt_set_timeout, }; static int ls1x_wdt_probe(struct platform_device *pdev) { struct ls1x_wdt_drvdata *drvdata; struct watchdog_device *ls1x_wdt; unsigned long clk_rate; struct resource *res; int err; drvdata = devm_kzalloc(&pdev->dev, sizeof(*drvdata), GFP_KERNEL); if (!drvdata) return -ENOMEM; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); drvdata->base = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(drvdata->base)) return PTR_ERR(drvdata->base); drvdata->clk = devm_clk_get(&pdev->dev, pdev->name); if (IS_ERR(drvdata->clk)) return PTR_ERR(drvdata->clk); err = clk_prepare_enable(drvdata->clk); if (err) { dev_err(&pdev->dev, "clk enable failed\n"); return err; } clk_rate = clk_get_rate(drvdata->clk); if (!clk_rate) { err = -EINVAL; goto err0; } drvdata->clk_rate = clk_rate; ls1x_wdt = &drvdata->wdt; ls1x_wdt->info = &ls1x_wdt_info; ls1x_wdt->ops = &ls1x_wdt_ops; ls1x_wdt->timeout = DEFAULT_HEARTBEAT; ls1x_wdt->min_timeout = 1; ls1x_wdt->max_hw_heartbeat_ms = U32_MAX / clk_rate * 1000; ls1x_wdt->parent = &pdev->dev; watchdog_init_timeout(ls1x_wdt, heartbeat, &pdev->dev); watchdog_set_nowayout(ls1x_wdt, nowayout); watchdog_set_drvdata(ls1x_wdt, drvdata); err = watchdog_register_device(&drvdata->wdt); if (err) { dev_err(&pdev->dev, "failed to register watchdog device\n"); goto err0; } platform_set_drvdata(pdev, drvdata); dev_info(&pdev->dev, "Loongson1 Watchdog driver registered\n"); return 0; err0: clk_disable_unprepare(drvdata->clk); return err; } static int ls1x_wdt_remove(struct platform_device *pdev) { struct ls1x_wdt_drvdata *drvdata = platform_get_drvdata(pdev); watchdog_unregister_device(&drvdata->wdt); clk_disable_unprepare(drvdata->clk); return 0; } static struct platform_driver ls1x_wdt_driver = { .probe = ls1x_wdt_probe, .remove = ls1x_wdt_remove, .driver = { .name = "ls1x-wdt", }, }; module_platform_driver(ls1x_wdt_driver); MODULE_AUTHOR("Yang Ling "); MODULE_DESCRIPTION("Loongson1 Watchdog Driver"); MODULE_LICENSE("GPL"); '/cgit.cgi/linux/net-next.git/tree/include/drm/drmP.h?id=3484ecbe0e9deb94afb0b9b6172d77e98eb72b94'>drmP.h25758logplain -rw-r--r--drm_agpsupport.h3867logplain -rw-r--r--drm_atomic.h14443logplain -rw-r--r--drm_atomic_helper.h10607logplain -rw-r--r--drm_auth.h2260logplain -rw-r--r--drm_blend.h2700logplain -rw-r--r--drm_bridge.h7977logplain -rw-r--r--drm_cache.h1763logplain -rw-r--r--drm_color_mgmt.h2166logplain -rw-r--r--drm_connector.h28613logplain -rw-r--r--drm_crtc.h28999logplain -rw-r--r--drm_crtc_helper.h3301logplain -rw-r--r--drm_debugfs_crc.h2670logplain -rw-r--r--drm_displayid.h2850logplain -rw-r--r--drm_dp_dual_mode_helper.h4532logplain -rw-r--r--drm_dp_helper.h30638logplain -rw-r--r--drm_dp_mst_helper.h16260logplain -rw-r--r--drm_drv.h14861logplain -rw-r--r--drm_edid.h14335logplain -rw-r--r--drm_encoder.h8160logplain -rw-r--r--drm_encoder_slave.h6583logplain -rw-r--r--drm_fb_cma_helper.h1929logplain -rw-r--r--drm_fb_helper.h15125logplain -rw-r--r--drm_fixed.h4825logplain -rw-r--r--drm_flip_work.h3071logplain -rw-r--r--drm_fourcc.h2748logplain -rw-r--r--drm_framebuffer.h9623logplain -rw-r--r--drm_gem.h8052logplain -rw-r--r--drm_gem_cma_helper.h2286logplain -rw-r--r--drm_global.h2011logplain -rw-r--r--drm_hashtab.h3139logplain -rw-r--r--drm_irq.h6323logplain -rw-r--r--drm_legacy.h6933logplain -rw-r--r--drm_mem_util.h2468logplain -rw-r--r--drm_mipi_dsi.h10327logplain -rw-r--r--drm_mm.h11462logplain -rw-r--r--drm_mode_config.h23728logplain -rw-r--r--drm_mode_object.h4911logplain -rw-r--r--drm_modes.h17078logplain -rw-r--r--drm_modeset_helper.h1576logplain -rw-r--r--drm_modeset_helper_vtables.h41180logplain -rw-r--r--drm_modeset_lock.h4241logplain -rw-r--r--drm_of.h2034logplain -rw-r--r--drm_os_linux.h2230logplain -rw-r--r--drm_panel.h7079logplain -rw-r--r--drm_pciids.h68035logplain -rw-r--r--drm_plane.h19435logplain -rw-r--r--drm_plane_helper.h3186logplain -rw-r--r--drm_print.h3232logplain -rw-r--r--drm_property.h11460logplain -rw-r--r--drm_rect.h5103logplain -rw-r--r--drm_simple_kms_helper.h4090logplain -rw-r--r--drm_sysfs.h300logplain -rw-r--r--drm_vma_manager.h7840logplain -rw-r--r--gma_drm.h1033logplain d---------i2c109logplain