87 	struct tegra186_wdt *wdt;  member
98 static void wdt_writel(struct tegra186_wdt *wdt, u32 value, unsigned int offset)  in wdt_writel()  argument
100 	writel_relaxed(value, wdt->regs + offset);  in wdt_writel()
103 static u32 wdt_readl(struct tegra186_wdt *wdt, unsigned int offset)  in wdt_readl()  argument
105 	return readl_relaxed(wdt->regs + offset);  in wdt_readl()
128 	.identity = "NVIDIA Tegra186 WDT",
131 static void tegra186_wdt_disable(struct tegra186_wdt *wdt)  in tegra186_wdt_disable()  argument
134 	wdt_writel(wdt, WDTUR_UNLOCK_PATTERN, WDTUR);  in tegra186_wdt_disable()
135 	wdt_writel(wdt, WDTCMDR_DISABLE_COUNTER, WDTCMDR);  in tegra186_wdt_disable()
138 	tmr_writel(wdt->tmr, 0, TMRCR);  in tegra186_wdt_disable()
141 static void tegra186_wdt_enable(struct tegra186_wdt *wdt)  in tegra186_wdt_enable()  argument
143 	struct tegra186_timer *tegra = wdt->tmr->parent;  in tegra186_wdt_enable()
147 	value = TKEIE_WDT_MASK(wdt->index, 1);  in tegra186_wdt_enable()
148 	writel(value, tegra->regs + TKEIE(wdt->tmr->hwirq));  in tegra186_wdt_enable()
151 	tmr_writel(wdt->tmr, TMRSR_INTR_CLR, TMRSR);  in tegra186_wdt_enable()
154 	tmr_writel(wdt->tmr, TMRCSSR_SRC_USEC, TMRCSSR);  in tegra186_wdt_enable()
157 	value = TMRCR_PTV(wdt->base.timeout * USEC_PER_SEC / 5) |  in tegra186_wdt_enable()
159 	tmr_writel(wdt->tmr, value, TMRCR);  in tegra186_wdt_enable()
161 	if (!wdt->locked) {  in tegra186_wdt_enable()
162 		value = wdt_readl(wdt, WDTCR);  in tegra186_wdt_enable()
166 		value |= WDTCR_TIMER_SOURCE(wdt->tmr->index);  in tegra186_wdt_enable()
172 		/* enable local interrupt for WDT petting */  in tegra186_wdt_enable()
187 		wdt_writel(wdt, value, WDTCR);  in tegra186_wdt_enable()
190 	wdt_writel(wdt, WDTCMDR_START_COUNTER, WDTCMDR);  in tegra186_wdt_enable()
195 	struct tegra186_wdt *wdt = to_tegra186_wdt(wdd);  in tegra186_wdt_start()  local
197 	tegra186_wdt_enable(wdt);  in tegra186_wdt_start()
204 	struct tegra186_wdt *wdt = to_tegra186_wdt(wdd);  in tegra186_wdt_stop()  local
206 	tegra186_wdt_disable(wdt);  in tegra186_wdt_stop()
213 	struct tegra186_wdt *wdt = to_tegra186_wdt(wdd);  in tegra186_wdt_ping()  local
215 	tegra186_wdt_disable(wdt);  in tegra186_wdt_ping()
216 	tegra186_wdt_enable(wdt);  in tegra186_wdt_ping()
224 	struct tegra186_wdt *wdt = to_tegra186_wdt(wdd);  in tegra186_wdt_set_timeout()  local
226 	if (watchdog_active(&wdt->base))  in tegra186_wdt_set_timeout()
227 		tegra186_wdt_disable(wdt);  in tegra186_wdt_set_timeout()
229 	wdt->base.timeout = timeout;  in tegra186_wdt_set_timeout()
231 	if (watchdog_active(&wdt->base))  in tegra186_wdt_set_timeout()
232 		tegra186_wdt_enable(wdt);  in tegra186_wdt_set_timeout()
249 	struct tegra186_wdt *wdt;  in tegra186_wdt_create()  local
255 	wdt = devm_kzalloc(tegra->dev, sizeof(*wdt), GFP_KERNEL);  in tegra186_wdt_create()
256 	if (!wdt)  in tegra186_wdt_create()
259 	wdt->regs = tegra->regs + offset;  in tegra186_wdt_create()
260 	wdt->index = index;  in tegra186_wdt_create()
263 	value = wdt_readl(wdt, WDTCR);  in tegra186_wdt_create()
266 		wdt->locked = true;  in tegra186_wdt_create()
270 	wdt->tmr = tegra186_tmr_create(tegra, source);  in tegra186_wdt_create()
271 	if (IS_ERR(wdt->tmr))  in tegra186_wdt_create()
272 		return ERR_CAST(wdt->tmr);  in tegra186_wdt_create()
274 	wdt->base.info = &tegra186_wdt_info;  in tegra186_wdt_create()
275 	wdt->base.ops = &tegra186_wdt_ops;  in tegra186_wdt_create()
276 	wdt->base.min_timeout = 1;  in tegra186_wdt_create()
277 	wdt->base.max_timeout = 255;  in tegra186_wdt_create()
278 	wdt->base.parent = tegra->dev;  in tegra186_wdt_create()
280 	err = watchdog_init_timeout(&wdt->base, 5, tegra->dev);  in tegra186_wdt_create()
286 	err = devm_watchdog_register_device(tegra->dev, &wdt->base);  in tegra186_wdt_create()
288 		dev_err(tegra->dev, "failed to register WDT: %d\n", err);  in tegra186_wdt_create()
292 	return wdt;  in tegra186_wdt_create()
372 	if (watchdog_active(&tegra->wdt->base)) {  in tegra186_timer_irq()
373 		tegra186_wdt_disable(tegra->wdt);  in tegra186_timer_irq()
374 		tegra186_wdt_enable(tegra->wdt);  in tegra186_timer_irq()
406 	tegra->wdt = tegra186_wdt_create(tegra, 0);  in tegra186_timer_probe()
407 	if (IS_ERR(tegra->wdt)) {  in tegra186_timer_probe()
408 		err = PTR_ERR(tegra->wdt);  in tegra186_timer_probe()
409 		dev_err(dev, "failed to create WDT: %d\n", err);  in tegra186_timer_probe()
462 	if (watchdog_active(&tegra->wdt->base))  in tegra186_timer_suspend()
463 		tegra186_wdt_disable(tegra->wdt);  in tegra186_timer_suspend()
472 	if (watchdog_active(&tegra->wdt->base))  in tegra186_timer_resume()
473 		tegra186_wdt_enable(tegra->wdt);  in tegra186_timer_resume()