144 static inline void ts72xx_wdt_kick(struct ts72xx_wdt *wdt)  in ts72xx_wdt_kick()  argument
146 	__raw_writeb(TS72XX_WDT_FEED_VAL, wdt->feed_reg);  in ts72xx_wdt_kick()
158 static void ts72xx_wdt_start(struct ts72xx_wdt *wdt)  in ts72xx_wdt_start()  argument
165 	ts72xx_wdt_kick(wdt);  in ts72xx_wdt_start()
166 	__raw_writeb((u8)wdt->regval, wdt->control_reg);  in ts72xx_wdt_start()
175 static void ts72xx_wdt_stop(struct ts72xx_wdt *wdt)  in ts72xx_wdt_stop()  argument
177 	ts72xx_wdt_kick(wdt);  in ts72xx_wdt_stop()
178 	__raw_writeb(0, wdt->control_reg);  in ts72xx_wdt_stop()
183 	struct ts72xx_wdt *wdt = platform_get_drvdata(ts72xx_wdt_pdev);  in ts72xx_wdt_open()  local
192 		dev_err(&wdt->pdev->dev,  in ts72xx_wdt_open()
198 	if (mutex_lock_interruptible(&wdt->lock))  in ts72xx_wdt_open()
201 	if ((wdt->flags & TS72XX_WDT_BUSY_FLAG) != 0) {  in ts72xx_wdt_open()
202 		mutex_unlock(&wdt->lock);  in ts72xx_wdt_open()
206 	wdt->flags = TS72XX_WDT_BUSY_FLAG;  in ts72xx_wdt_open()
207 	wdt->regval = regval;  in ts72xx_wdt_open()
208 	file->private_data = wdt;  in ts72xx_wdt_open()
210 	ts72xx_wdt_start(wdt);  in ts72xx_wdt_open()
212 	mutex_unlock(&wdt->lock);  in ts72xx_wdt_open()
218 	struct ts72xx_wdt *wdt = file->private_data;  in ts72xx_wdt_release()  local
220 	if (mutex_lock_interruptible(&wdt->lock))  in ts72xx_wdt_release()
223 	if ((wdt->flags & TS72XX_WDT_EXPECT_CLOSE_FLAG) != 0) {  in ts72xx_wdt_release()
224 		ts72xx_wdt_stop(wdt);  in ts72xx_wdt_release()
226 		dev_warn(&wdt->pdev->dev,  in ts72xx_wdt_release()
234 		ts72xx_wdt_kick(wdt);  in ts72xx_wdt_release()
237 	wdt->flags = 0;  in ts72xx_wdt_release()
239 	mutex_unlock(&wdt->lock);  in ts72xx_wdt_release()
248 	struct ts72xx_wdt *wdt = file->private_data;  in ts72xx_wdt_write()  local
253 	if (mutex_lock_interruptible(&wdt->lock))  in ts72xx_wdt_write()
256 	ts72xx_wdt_kick(wdt);  in ts72xx_wdt_write()
271 			wdt->flags &= ~TS72XX_WDT_EXPECT_CLOSE_FLAG;  in ts72xx_wdt_write()
274 				mutex_unlock(&wdt->lock);  in ts72xx_wdt_write()
278 				wdt->flags |= TS72XX_WDT_EXPECT_CLOSE_FLAG;  in ts72xx_wdt_write()
284 	mutex_unlock(&wdt->lock);  in ts72xx_wdt_write()
298 	struct ts72xx_wdt *wdt = file->private_data;  in ts72xx_wdt_ioctl()  local
303 	if (mutex_lock_interruptible(&wdt->lock))  in ts72xx_wdt_ioctl()
318 		ts72xx_wdt_kick(wdt);  in ts72xx_wdt_ioctl()
331 			ts72xx_wdt_stop(wdt);  in ts72xx_wdt_ioctl()
335 			ts72xx_wdt_start(wdt);  in ts72xx_wdt_ioctl()
355 		ts72xx_wdt_stop(wdt);  in ts72xx_wdt_ioctl()
356 		wdt->regval = regval;  in ts72xx_wdt_ioctl()
357 		ts72xx_wdt_start(wdt);  in ts72xx_wdt_ioctl()
363 		error = put_user(regval_to_timeout(wdt->regval), p);  in ts72xx_wdt_ioctl()
371 	mutex_unlock(&wdt->lock);  in ts72xx_wdt_ioctl()
392 	struct ts72xx_wdt *wdt;  in ts72xx_wdt_probe()  local
396 	wdt = devm_kzalloc(&pdev->dev, sizeof(struct ts72xx_wdt), GFP_KERNEL);  in ts72xx_wdt_probe()
397 	if (!wdt)  in ts72xx_wdt_probe()
401 	wdt->control_reg = devm_ioremap_resource(&pdev->dev, r1);  in ts72xx_wdt_probe()
402 	if (IS_ERR(wdt->control_reg))  in ts72xx_wdt_probe()
403 		return PTR_ERR(wdt->control_reg);  in ts72xx_wdt_probe()
406 	wdt->feed_reg = devm_ioremap_resource(&pdev->dev, r2);  in ts72xx_wdt_probe()
407 	if (IS_ERR(wdt->feed_reg))  in ts72xx_wdt_probe()
408 		return PTR_ERR(wdt->feed_reg);  in ts72xx_wdt_probe()
410 	platform_set_drvdata(pdev, wdt);  in ts72xx_wdt_probe()
412 	wdt->pdev = pdev;  in ts72xx_wdt_probe()
413 	mutex_init(&wdt->lock);  in ts72xx_wdt_probe()
416 	ts72xx_wdt_stop(wdt);  in ts72xx_wdt_probe()