drivers/watchdog/imx7ulp_wdt.c

83 static int imx7ulp_wdt_wait_rcs(struct imx7ulp_wdt_device *wdt)
86 	u32 val = readl(wdt->base + WDOG_CS);
93 	    readl_poll_timeout(wdt->base + WDOG_CS, val, val & WDOG_CS_RCS, 100,
98 	if (wdt->post_rcs_wait)
104 static int _imx7ulp_wdt_enable(struct imx7ulp_wdt_device *wdt, bool enable)
106 	u32 val = readl(wdt->base + WDOG_CS);
110 	writel(UNLOCK, wdt->base + WDOG_CNT);
111 	ret = imx7ulp_wdt_wait_ulk(wdt->base);
115 		writel(val | WDOG_CS_EN, wdt->base + WDOG_CS);
117 		writel(val & ~WDOG_CS_EN, wdt->base + WDOG_CS);
120 	ret = imx7ulp_wdt_wait_rcs(wdt);
131 	struct imx7ulp_wdt_device *wdt = watchdog_get_drvdata(wdog);
137 		ret = _imx7ulp_wdt_enable(wdt, enable);
138 		val = readl(wdt->base + WDOG_CS);
149 	struct imx7ulp_wdt_device *wdt = watchdog_get_drvdata(wdog);
151 	writel(REFRESH, wdt->base + WDOG_CNT);
166 static int _imx7ulp_wdt_set_timeout(struct imx7ulp_wdt_device *wdt,
172 	writel(UNLOCK, wdt->base + WDOG_CNT);
173 	ret = imx7ulp_wdt_wait_ulk(wdt->base);
176 	writel(toval, wdt->base + WDOG_TOVAL);
178 	ret = imx7ulp_wdt_wait_rcs(wdt);
189 	struct imx7ulp_wdt_device *wdt = watchdog_get_drvdata(wdog);
190 	u32 toval = wdt->hw->wdog_clock_rate * timeout;
196 		ret = _imx7ulp_wdt_set_timeout(wdt, toval);
197 		val = readl(wdt->base + WDOG_TOVAL);
210 	struct imx7ulp_wdt_device *wdt = watchdog_get_drvdata(wdog);
217 	ret = imx7ulp_wdt_set_timeout(&wdt->wdd, 1);
243 static int _imx7ulp_wdt_init(struct imx7ulp_wdt_device *wdt, unsigned int timeout, unsigned int cs)
250 	val = readl(wdt->base + WDOG_CS);
252 		writel(UNLOCK, wdt->base + WDOG_CNT);
256 		writel_relaxed(UNLOCK_SEQ0, wdt->base + WDOG_CNT);
257 		writel_relaxed(UNLOCK_SEQ1, wdt->base + WDOG_CNT);
261 	ret = imx7ulp_wdt_wait_ulk(wdt->base);
266 	writel(timeout, wdt->base + WDOG_TOVAL);
267 	writel(cs, wdt->base + WDOG_CS);
269 	ret = imx7ulp_wdt_wait_rcs(wdt);
278 static int imx7ulp_wdt_init(struct imx7ulp_wdt_device *wdt, unsigned int timeout)
287 	if (wdt->hw->prescaler_enable)
290 	if (wdt->ext_reset)
294 		ret = _imx7ulp_wdt_init(wdt, timeout, val);
295 		toval = readl(wdt->base + WDOG_TOVAL);
296 		cs = readl(wdt->base + WDOG_CS);
334 				    "fsl,imx8ulp-wdt")) {
335 		dev_info(dev, "imx8ulp wdt probe\n");
338 		dev_info(dev, "imx7ulp wdt probe\n");
409 	{ .compatible = "fsl,imx8ulp-wdt", .data = &imx7ulp_wdt_hw, },
410 	{ .compatible = "fsl,imx7ulp-wdt", .data = &imx7ulp_wdt_hw, },
411 	{ .compatible = "fsl,imx93-wdt", .data = &imx93_wdt_hw, },
419 		.name	= "imx7ulp-wdt",