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()
164 	struct xwdt_device *xdev;  in xwdt_probe()  local
167 	xdev = devm_kzalloc(dev, sizeof(*xdev), GFP_KERNEL);  in xwdt_probe()
168 	if (!xdev)  in xwdt_probe()
171 	xilinx_wdt_wdd = &xdev->xilinx_wdt_wdd;  in xwdt_probe()
176 	xdev->base = devm_platform_ioremap_resource(pdev, 0);  in xwdt_probe()
177 	if (IS_ERR(xdev->base))  in xwdt_probe()
178 		return PTR_ERR(xdev->base);  in xwdt_probe()
181 				  &xdev->wdt_interval);  in xwdt_probe()
193 	xdev->clk = devm_clk_get(dev, NULL);  in xwdt_probe()
194 	if (IS_ERR(xdev->clk)) {  in xwdt_probe()
195 		if (PTR_ERR(xdev->clk) != -ENOENT)  in xwdt_probe()
196 			return PTR_ERR(xdev->clk);  in xwdt_probe()
202 		xdev->clk = NULL;  in xwdt_probe()
210 		pfreq = clk_get_rate(xdev->clk);  in xwdt_probe()
217 	if (pfreq && xdev->wdt_interval)  in xwdt_probe()
218 		xilinx_wdt_wdd->timeout = 2 * ((1 << xdev->wdt_interval) /  in xwdt_probe()
221 	spin_lock_init(&xdev->spinlock);  in xwdt_probe()
222 	watchdog_set_drvdata(xilinx_wdt_wdd, xdev);  in xwdt_probe()
224 	rc = clk_prepare_enable(xdev->clk);  in xwdt_probe()
230 				      xdev->clk);  in xwdt_probe()
234 	rc = xwdt_selftest(xdev);  in xwdt_probe()
244 	clk_disable(xdev->clk);  in xwdt_probe()
247 		 xdev->base, xilinx_wdt_wdd->timeout);  in xwdt_probe()
249 	platform_set_drvdata(pdev, xdev);  in xwdt_probe()
262 	struct xwdt_device *xdev = dev_get_drvdata(dev);  in xwdt_suspend()  local
264 	if (watchdog_active(&xdev->xilinx_wdt_wdd))  in xwdt_suspend()
265 		xilinx_wdt_stop(&xdev->xilinx_wdt_wdd);  in xwdt_suspend()
278 	struct xwdt_device *xdev = dev_get_drvdata(dev);  in xwdt_resume()  local
281 	if (watchdog_active(&xdev->xilinx_wdt_wdd))  in xwdt_resume()
282 		ret = xilinx_wdt_start(&xdev->xilinx_wdt_wdd);  in xwdt_resume()