drivers/watchdog/digicolor_wdt.c

34 static void dc_wdt_set(struct dc_wdt *wdt, u32 ticks)
38 	spin_lock_irqsave(&wdt->lock, flags);
40 	writel_relaxed(0, wdt->base + TIMER_A_CONTROL);
41 	writel_relaxed(ticks, wdt->base + TIMER_A_COUNT);
43 		       wdt->base + TIMER_A_CONTROL);
45 	spin_unlock_irqrestore(&wdt->lock, flags);
51 	struct dc_wdt *wdt = watchdog_get_drvdata(wdog);
53 	dc_wdt_set(wdt, 1);
62 	struct dc_wdt *wdt = watchdog_get_drvdata(wdog);
64 	dc_wdt_set(wdt, wdog->timeout * clk_get_rate(wdt->clk));
71 	struct dc_wdt *wdt = watchdog_get_drvdata(wdog);
73 	writel_relaxed(0, wdt->base + TIMER_A_CONTROL);
80 	struct dc_wdt *wdt = watchdog_get_drvdata(wdog);
82 	dc_wdt_set(wdt, t * clk_get_rate(wdt->clk));
90 	struct dc_wdt *wdt = watchdog_get_drvdata(wdog);
91 	uint32_t count = readl_relaxed(wdt->base + TIMER_A_COUNT);
93 	return count / clk_get_rate(wdt->clk);
120 	struct dc_wdt *wdt;
122 	wdt = devm_kzalloc(dev, sizeof(struct dc_wdt), GFP_KERNEL);
123 	if (!wdt)
126 	wdt->base = devm_platform_ioremap_resource(pdev, 0);
127 	if (IS_ERR(wdt->base))
128 		return PTR_ERR(wdt->base);
130 	wdt->clk = devm_clk_get(dev, NULL);
131 	if (IS_ERR(wdt->clk))
132 		return PTR_ERR(wdt->clk);
133 	dc_wdt_wdd.max_timeout = U32_MAX / clk_get_rate(wdt->clk);
137 	spin_lock_init(&wdt->lock);
139 	watchdog_set_drvdata(&dc_wdt_wdd, wdt);
147 	{ .compatible = "cnxt,cx92755-wdt", },
155 		.name =		"digicolor-wdt",