1 // SPDX-License-Identifier: GPL-2.0+
80 	u32 ctrl;  member
84 	/* On pre-ast2500 SoCs this register is reserved. */
98 static int ast_wdt_start(struct udevice *dev, u64 timeout, ulong flags)  in ast_wdt_start()  argument
100 	struct ast_wdt_priv *priv = dev_get_priv(dev);  in ast_wdt_start()
102 	writel((u32) timeout, &priv->regs->counter_reload_val);  in ast_wdt_start()
104 	writel(WDT_COUNTER_RESTART_VAL, &priv->regs->counter_restart);  in ast_wdt_start()
106 	writel(WDT_CTRL_EN | WDT_CTRL_RESET, &priv->regs->ctrl);  in ast_wdt_start()
111 static int ast_wdt_stop(struct udevice *dev)  in ast_wdt_stop()  argument
113 	struct ast_wdt_priv *priv = dev_get_priv(dev);  in ast_wdt_stop()
114 	ulong driver_data = dev_get_driver_data(dev);  in ast_wdt_stop()
116 	clrbits_le32(&priv->regs->ctrl, WDT_CTRL_EN);  in ast_wdt_stop()
119 		writel(0x030f1ff1, &priv->regs->reset_mask1);  in ast_wdt_stop()
120 		writel(0x3fffff1, &priv->regs->reset_mask2);  in ast_wdt_stop()
122 		writel(WDT_RESET_DEFAULT, &priv->regs->reset_mask1);  in ast_wdt_stop()
127 static int ast_wdt_reset(struct udevice *dev)  in ast_wdt_reset()  argument
129 	struct ast_wdt_priv *priv = dev_get_priv(dev);  in ast_wdt_reset()
131 	writel(WDT_COUNTER_RESTART_VAL, &priv->regs->counter_restart);  in ast_wdt_reset()
136 static int ast_wdt_expire_now(struct udevice *dev, ulong flags)  in ast_wdt_expire_now()  argument
138 	struct ast_wdt_priv *priv = dev_get_priv(dev);  in ast_wdt_expire_now()
141 	ret = ast_wdt_start(dev, 1, flags);  in ast_wdt_expire_now()
145 	while (readl(&priv->regs->ctrl) & WDT_CTRL_EN);  in ast_wdt_expire_now()
147 	return ast_wdt_stop(dev);  in ast_wdt_expire_now()
150 static int ast_wdt_ofdata_to_platdata(struct udevice *dev)  in ast_wdt_ofdata_to_platdata()  argument
152 	struct ast_wdt_priv *priv = dev_get_priv(dev);  in ast_wdt_ofdata_to_platdata()
154 	priv->regs = devfdt_get_addr_ptr(dev);  in ast_wdt_ofdata_to_platdata()
155 	if (IS_ERR(priv->regs))  in ast_wdt_ofdata_to_platdata()
156 		return PTR_ERR(priv->regs);  in ast_wdt_ofdata_to_platdata()
168 static int ast_wdt_probe(struct udevice *dev)  in ast_wdt_probe()  argument
170 	debug("%s() wdt%u\n", __func__, dev->seq);  in ast_wdt_probe()
171 	ast_wdt_stop(dev);  in ast_wdt_probe()
178 	{ .compatible = "aspeed,ast2600-wdt", .data = WDT_AST2600 },
179 	{ .compatible = "aspeed,ast2500-wdt", .data = WDT_AST2500 },
180 	{ .compatible = "aspeed,ast2400-wdt", .data = WDT_AST2400 },