48 static inline void dmt_enable(struct pic32_dmt *dmt)  in dmt_enable()  argument
50 	writel(DMT_ON, PIC32_SET(dmt->regs + DMTCON_REG));  in dmt_enable()
53 static inline void dmt_disable(struct pic32_dmt *dmt)  in dmt_disable()  argument
55 	writel(DMT_ON, PIC32_CLR(dmt->regs + DMTCON_REG));  in dmt_disable()
63 static inline int dmt_bad_status(struct pic32_dmt *dmt)  in dmt_bad_status()  argument
67 	val = readl(dmt->regs + DMTSTAT_REG);  in dmt_bad_status()
75 static inline int dmt_keepalive(struct pic32_dmt *dmt)  in dmt_keepalive()  argument
81 	writel(DMT_STEP1_KEY << 8, dmt->regs + DMTPRECLR_REG);  in dmt_keepalive()
85 		v = readl(dmt->regs + DMTSTAT_REG) & DMTSTAT_WINOPN;  in dmt_keepalive()
91 	writel(DMT_STEP2_KEY, dmt->regs + DMTCLR_REG);  in dmt_keepalive()
94 	return dmt_bad_status(dmt);  in dmt_keepalive()
97 static inline u32 pic32_dmt_get_timeout_secs(struct pic32_dmt *dmt)  in pic32_dmt_get_timeout_secs()  argument
101 	rate = clk_get_rate(dmt->clk);  in pic32_dmt_get_timeout_secs()
103 		return readl(dmt->regs + DMTPSCNT_REG) / rate;  in pic32_dmt_get_timeout_secs()
108 static inline u32 pic32_dmt_bootstatus(struct pic32_dmt *dmt)  in pic32_dmt_bootstatus()  argument
127 	struct pic32_dmt *dmt = watchdog_get_drvdata(wdd);  in pic32_dmt_start()  local
129 	dmt_enable(dmt);  in pic32_dmt_start()
130 	return dmt_keepalive(dmt);  in pic32_dmt_start()
135 	struct pic32_dmt *dmt = watchdog_get_drvdata(wdd);  in pic32_dmt_stop()  local
137 	dmt_disable(dmt);  in pic32_dmt_stop()
144 	struct pic32_dmt *dmt = watchdog_get_drvdata(wdd);  in pic32_dmt_ping()  local
146 	return dmt_keepalive(dmt);  in pic32_dmt_ping()
176 	struct pic32_dmt *dmt;  in pic32_dmt_probe()  local
179 	dmt = devm_kzalloc(dev, sizeof(*dmt), GFP_KERNEL);  in pic32_dmt_probe()
180 	if (!dmt)  in pic32_dmt_probe()
183 	dmt->regs = devm_platform_ioremap_resource(pdev, 0);  in pic32_dmt_probe()
184 	if (IS_ERR(dmt->regs))  in pic32_dmt_probe()
185 		return PTR_ERR(dmt->regs);  in pic32_dmt_probe()
187 	dmt->clk = devm_clk_get(dev, NULL);  in pic32_dmt_probe()
188 	if (IS_ERR(dmt->clk)) {  in pic32_dmt_probe()
190 		return PTR_ERR(dmt->clk);  in pic32_dmt_probe()
193 	ret = clk_prepare_enable(dmt->clk);  in pic32_dmt_probe()
197 				       dmt->clk);  in pic32_dmt_probe()
201 	wdd->timeout = pic32_dmt_get_timeout_secs(dmt);  in pic32_dmt_probe()
209 	wdd->bootstatus = pic32_dmt_bootstatus(dmt) ? WDIOF_CARDRESET : 0;  in pic32_dmt_probe()
212 	watchdog_set_drvdata(wdd, dmt);  in pic32_dmt_probe()