58 static int secure_register_read(struct bcm_kona_wdt *wdt, uint32_t offset)  in secure_register_read()  argument
71 		val = readl_relaxed(wdt->base + offset);  in secure_register_read()
77 	if (count > wdt->busy_count)  in secure_register_read()
78 		wdt->busy_count = count;  in secure_register_read()
97 	struct bcm_kona_wdt *wdt = s->private;  in bcm_kona_show()  local
99 	if (!wdt) {  in bcm_kona_show()
104 	spin_lock_irqsave(&wdt->lock, flags);  in bcm_kona_show()
105 	ctl_val = secure_register_read(wdt, SECWDOG_CTRL_REG);  in bcm_kona_show()
106 	cur_val = secure_register_read(wdt, SECWDOG_COUNT_REG);  in bcm_kona_show()
107 	spin_unlock_irqrestore(&wdt->lock, flags);  in bcm_kona_show()
117 		ctl_sec = TICKS_TO_SECS(ctl, wdt);  in bcm_kona_show()
118 		cur_sec = TICKS_TO_SECS(cur, wdt);  in bcm_kona_show()
124 			   res, wdt->resolution,  in bcm_kona_show()
127 			   wdt->busy_count);  in bcm_kona_show()
138 	struct bcm_kona_wdt *wdt = platform_get_drvdata(pdev);  in bcm_kona_wdt_debug_init()  local
140 	if (!wdt)  in bcm_kona_wdt_debug_init()
143 	wdt->debugfs = NULL;  in bcm_kona_wdt_debug_init()
147 	debugfs_create_file("info", S_IFREG | S_IRUGO, dir, wdt,  in bcm_kona_wdt_debug_init()
149 	wdt->debugfs = dir;  in bcm_kona_wdt_debug_init()
154 	struct bcm_kona_wdt *wdt = platform_get_drvdata(pdev);  in bcm_kona_wdt_debug_exit()  local
156 	if (wdt)  in bcm_kona_wdt_debug_exit()
157 		debugfs_remove_recursive(wdt->debugfs);  in bcm_kona_wdt_debug_exit()
167 static int bcm_kona_wdt_ctrl_reg_modify(struct bcm_kona_wdt *wdt,  in bcm_kona_wdt_ctrl_reg_modify()  argument
174 	spin_lock_irqsave(&wdt->lock, flags);  in bcm_kona_wdt_ctrl_reg_modify()
176 	val = secure_register_read(wdt, SECWDOG_CTRL_REG);  in bcm_kona_wdt_ctrl_reg_modify()
182 		writel_relaxed(val, wdt->base + SECWDOG_CTRL_REG);  in bcm_kona_wdt_ctrl_reg_modify()
185 	spin_unlock_irqrestore(&wdt->lock, flags);  in bcm_kona_wdt_ctrl_reg_modify()
190 static int bcm_kona_wdt_set_resolution_reg(struct bcm_kona_wdt *wdt)  in bcm_kona_wdt_set_resolution_reg()  argument
192 	if (wdt->resolution > SECWDOG_MAX_RES)  in bcm_kona_wdt_set_resolution_reg()
195 	return bcm_kona_wdt_ctrl_reg_modify(wdt, SECWDOG_RES_MASK,  in bcm_kona_wdt_set_resolution_reg()
196 					wdt->resolution << SECWDOG_CLKS_SHIFT);  in bcm_kona_wdt_set_resolution_reg()
202 	struct bcm_kona_wdt *wdt = watchdog_get_drvdata(wdog);  in bcm_kona_wdt_set_timeout_reg()  local
204 	return bcm_kona_wdt_ctrl_reg_modify(wdt, SECWDOG_COUNT_MASK,  in bcm_kona_wdt_set_timeout_reg()
205 					SECS_TO_TICKS(wdog->timeout, wdt) |  in bcm_kona_wdt_set_timeout_reg()
218 	struct bcm_kona_wdt *wdt = watchdog_get_drvdata(wdog);  in bcm_kona_wdt_get_timeleft()  local
222 	spin_lock_irqsave(&wdt->lock, flags);  in bcm_kona_wdt_get_timeleft()
223 	val = secure_register_read(wdt, SECWDOG_COUNT_REG);  in bcm_kona_wdt_get_timeleft()
224 	spin_unlock_irqrestore(&wdt->lock, flags);  in bcm_kona_wdt_get_timeleft()
229 	return TICKS_TO_SECS(val & SECWDOG_COUNT_MASK, wdt);  in bcm_kona_wdt_get_timeleft()
240 	struct bcm_kona_wdt *wdt = watchdog_get_drvdata(wdog);  in bcm_kona_wdt_stop()  local
242 	return bcm_kona_wdt_ctrl_reg_modify(wdt, SECWDOG_EN_MASK |  in bcm_kona_wdt_stop()
271 	struct bcm_kona_wdt *wdt;  in bcm_kona_wdt_probe()  local
274 	wdt = devm_kzalloc(dev, sizeof(*wdt), GFP_KERNEL);  in bcm_kona_wdt_probe()
275 	if (!wdt)  in bcm_kona_wdt_probe()
278 	spin_lock_init(&wdt->lock);  in bcm_kona_wdt_probe()
280 	wdt->base = devm_platform_ioremap_resource(pdev, 0);  in bcm_kona_wdt_probe()
281 	if (IS_ERR(wdt->base))  in bcm_kona_wdt_probe()
282 		return PTR_ERR(wdt->base);  in bcm_kona_wdt_probe()
284 	wdt->resolution = SECWDOG_DEFAULT_RESOLUTION;  in bcm_kona_wdt_probe()
285 	ret = bcm_kona_wdt_set_resolution_reg(wdt);  in bcm_kona_wdt_probe()
291 	platform_set_drvdata(pdev, wdt);  in bcm_kona_wdt_probe()
292 	watchdog_set_drvdata(&bcm_kona_wdt_wdd, wdt);  in bcm_kona_wdt_probe()