53 	struct xwdt_device *xdev = watchdog_get_drvdata(wdd);  in xilinx_wdt_start()  local
55 	ret = clk_enable(xdev->clk);  in xilinx_wdt_start()
61 	spin_lock(&xdev->spinlock);  in xilinx_wdt_start()
64 	control_status_reg = ioread32(xdev->base + XWT_TWCSR0_OFFSET);  in xilinx_wdt_start()
68 		  xdev->base + XWT_TWCSR0_OFFSET);  in xilinx_wdt_start()
70 	iowrite32(XWT_CSRX_EWDT2_MASK, xdev->base + XWT_TWCSR1_OFFSET);  in xilinx_wdt_start()
72 	spin_unlock(&xdev->spinlock);  in xilinx_wdt_start()
82 	struct xwdt_device *xdev = watchdog_get_drvdata(wdd);  in xilinx_wdt_stop()  local
84 	spin_lock(&xdev->spinlock);  in xilinx_wdt_stop()
86 	control_status_reg = ioread32(xdev->base + XWT_TWCSR0_OFFSET);  in xilinx_wdt_stop()
89 		  xdev->base + XWT_TWCSR0_OFFSET);  in xilinx_wdt_stop()
91 	iowrite32(0, xdev->base + XWT_TWCSR1_OFFSET);  in xilinx_wdt_stop()
93 	spin_unlock(&xdev->spinlock);  in xilinx_wdt_stop()
95 	clk_disable(xdev->clk);  in xilinx_wdt_stop()
105 	struct xwdt_device *xdev = watchdog_get_drvdata(wdd);  in xilinx_wdt_keepalive()  local
107 	spin_lock(&xdev->spinlock);  in xilinx_wdt_keepalive()
109 	control_status_reg = ioread32(xdev->base + XWT_TWCSR0_OFFSET);  in xilinx_wdt_keepalive()
111 	iowrite32(control_status_reg, xdev->base + XWT_TWCSR0_OFFSET);  in xilinx_wdt_keepalive()
113 	spin_unlock(&xdev->spinlock);  in xilinx_wdt_keepalive()
132 static u32 xwdt_selftest(struct xwdt_device *xdev)  in xwdt_selftest()  argument
138 	spin_lock(&xdev->spinlock);  in xwdt_selftest()
140 	timer_value1 = ioread32(xdev->base + XWT_TBR_OFFSET);  in xwdt_selftest()
141 	timer_value2 = ioread32(xdev->base + XWT_TBR_OFFSET);  in xwdt_selftest()
146 		timer_value2 = ioread32(xdev->base + XWT_TBR_OFFSET);  in xwdt_selftest()
149 	spin_unlock(&xdev->spinlock);  in xwdt_selftest()
167 	struct xwdt_device *xdev;  in xwdt_probe()  local
170 	xdev = devm_kzalloc(dev, sizeof(*xdev), GFP_KERNEL);  in xwdt_probe()
171 	if (!xdev)  in xwdt_probe()
174 	xilinx_wdt_wdd = &xdev->xilinx_wdt_wdd;  in xwdt_probe()
179 	xdev->base = devm_platform_ioremap_resource(pdev, 0);  in xwdt_probe()
180 	if (IS_ERR(xdev->base))  in xwdt_probe()
181 		return PTR_ERR(xdev->base);  in xwdt_probe()
184 				  &xdev->wdt_interval);  in xwdt_probe()
196 	xdev->clk = devm_clk_get(dev, NULL);  in xwdt_probe()
197 	if (IS_ERR(xdev->clk)) {  in xwdt_probe()
198 		if (PTR_ERR(xdev->clk) != -ENOENT)  in xwdt_probe()
199 			return PTR_ERR(xdev->clk);  in xwdt_probe()
205 		xdev->clk = NULL;  in xwdt_probe()
213 		pfreq = clk_get_rate(xdev->clk);  in xwdt_probe()
214 		rc = clk_prepare_enable(xdev->clk);  in xwdt_probe()
220 					      xdev->clk);  in xwdt_probe()
229 	if (pfreq && xdev->wdt_interval)  in xwdt_probe()
230 		xilinx_wdt_wdd->timeout = 2 * ((1 << xdev->wdt_interval) /  in xwdt_probe()
233 	spin_lock_init(&xdev->spinlock);  in xwdt_probe()
234 	watchdog_set_drvdata(xilinx_wdt_wdd, xdev);  in xwdt_probe()
236 	rc = xwdt_selftest(xdev);  in xwdt_probe()
246 	clk_disable(xdev->clk);  in xwdt_probe()
251 	platform_set_drvdata(pdev, xdev);  in xwdt_probe()
264 	struct xwdt_device *xdev = dev_get_drvdata(dev);  in xwdt_suspend()  local
266 	if (watchdog_active(&xdev->xilinx_wdt_wdd))  in xwdt_suspend()
267 		xilinx_wdt_stop(&xdev->xilinx_wdt_wdd);  in xwdt_suspend()
280 	struct xwdt_device *xdev = dev_get_drvdata(dev);  in xwdt_resume()  local
283 	if (watchdog_active(&xdev->xilinx_wdt_wdd))  in xwdt_resume()
284 		ret = xilinx_wdt_start(&xdev->xilinx_wdt_wdd);  in xwdt_resume()