52 	struct xwdt_device *xdev = watchdog_get_drvdata(wdd);  in xilinx_wdt_start()  local
54 	ret = clk_enable(xdev->clk);  in xilinx_wdt_start()
60 	spin_lock(&xdev->spinlock);  in xilinx_wdt_start()
63 	control_status_reg = ioread32(xdev->base + XWT_TWCSR0_OFFSET);  in xilinx_wdt_start()
67 		  xdev->base + XWT_TWCSR0_OFFSET);  in xilinx_wdt_start()
69 	iowrite32(XWT_CSRX_EWDT2_MASK, xdev->base + XWT_TWCSR1_OFFSET);  in xilinx_wdt_start()
71 	spin_unlock(&xdev->spinlock);  in xilinx_wdt_start()
79 	struct xwdt_device *xdev = watchdog_get_drvdata(wdd);  in xilinx_wdt_stop()  local
81 	spin_lock(&xdev->spinlock);  in xilinx_wdt_stop()
83 	control_status_reg = ioread32(xdev->base + XWT_TWCSR0_OFFSET);  in xilinx_wdt_stop()
86 		  xdev->base + XWT_TWCSR0_OFFSET);  in xilinx_wdt_stop()
88 	iowrite32(0, xdev->base + XWT_TWCSR1_OFFSET);  in xilinx_wdt_stop()
90 	spin_unlock(&xdev->spinlock);  in xilinx_wdt_stop()
92 	clk_disable(xdev->clk);  in xilinx_wdt_stop()
102 	struct xwdt_device *xdev = watchdog_get_drvdata(wdd);  in xilinx_wdt_keepalive()  local
104 	spin_lock(&xdev->spinlock);  in xilinx_wdt_keepalive()
106 	control_status_reg = ioread32(xdev->base + XWT_TWCSR0_OFFSET);  in xilinx_wdt_keepalive()
108 	iowrite32(control_status_reg, xdev->base + XWT_TWCSR0_OFFSET);  in xilinx_wdt_keepalive()
110 	spin_unlock(&xdev->spinlock);  in xilinx_wdt_keepalive()
129 static u32 xwdt_selftest(struct xwdt_device *xdev)  in xwdt_selftest()  argument
135 	spin_lock(&xdev->spinlock);  in xwdt_selftest()
137 	timer_value1 = ioread32(xdev->base + XWT_TBR_OFFSET);  in xwdt_selftest()
138 	timer_value2 = ioread32(xdev->base + XWT_TBR_OFFSET);  in xwdt_selftest()
143 		timer_value2 = ioread32(xdev->base + XWT_TBR_OFFSET);  in xwdt_selftest()
146 	spin_unlock(&xdev->spinlock);  in xwdt_selftest()
159 	struct xwdt_device *xdev;  in xwdt_probe()  local
162 	xdev = devm_kzalloc(&pdev->dev, sizeof(*xdev), GFP_KERNEL);  in xwdt_probe()
163 	if (!xdev)  in xwdt_probe()
166 	xilinx_wdt_wdd = &xdev->xilinx_wdt_wdd;  in xwdt_probe()
172 	xdev->base = devm_ioremap_resource(&pdev->dev, res);  in xwdt_probe()
173 	if (IS_ERR(xdev->base))  in xwdt_probe()
174 		return PTR_ERR(xdev->base);  in xwdt_probe()
177 				  &xdev->wdt_interval);  in xwdt_probe()
190 	xdev->clk = devm_clk_get(&pdev->dev, NULL);  in xwdt_probe()
191 	if (IS_ERR(xdev->clk)) {  in xwdt_probe()
192 		if (PTR_ERR(xdev->clk) != -ENOENT)  in xwdt_probe()
193 			return PTR_ERR(xdev->clk);  in xwdt_probe()
199 		xdev->clk = NULL;  in xwdt_probe()
207 		pfreq = clk_get_rate(xdev->clk);  in xwdt_probe()
214 	if (pfreq && xdev->wdt_interval)  in xwdt_probe()
215 		xilinx_wdt_wdd->timeout = 2 * ((1 << xdev->wdt_interval) /  in xwdt_probe()
218 	spin_lock_init(&xdev->spinlock);  in xwdt_probe()
219 	watchdog_set_drvdata(xilinx_wdt_wdd, xdev);  in xwdt_probe()
221 	rc = clk_prepare_enable(xdev->clk);  in xwdt_probe()
227 	rc = xwdt_selftest(xdev);  in xwdt_probe()
239 	clk_disable(xdev->clk);  in xwdt_probe()
242 		 xdev->base, xilinx_wdt_wdd->timeout);  in xwdt_probe()
244 	platform_set_drvdata(pdev, xdev);  in xwdt_probe()
248 	clk_disable_unprepare(xdev->clk);  in xwdt_probe()
255 	struct xwdt_device *xdev = platform_get_drvdata(pdev);  in xwdt_remove()  local
257 	watchdog_unregister_device(&xdev->xilinx_wdt_wdd);  in xwdt_remove()
258 	clk_disable_unprepare(xdev->clk);  in xwdt_remove()
271 	struct xwdt_device *xdev = dev_get_drvdata(dev);  in xwdt_suspend()  local
273 	if (watchdog_active(&xdev->xilinx_wdt_wdd))  in xwdt_suspend()
274 		xilinx_wdt_stop(&xdev->xilinx_wdt_wdd);  in xwdt_suspend()
287 	struct xwdt_device *xdev = dev_get_drvdata(dev);  in xwdt_resume()  local
290 	if (watchdog_active(&xdev->xilinx_wdt_wdd))  in xwdt_resume()
291 		ret = xilinx_wdt_start(&xdev->xilinx_wdt_wdd);  in xwdt_resume()