watchdog: aspeed: Add support for AST2700 platform

Add AST2700 platform support to the ASPEED watchdog driver. This includes
a new per-platform configuration with SCU reset status register at
SCU1_070 and support for 5 reset mask registers.

Signed-off-by: Chin-Ting Kuo <chin-ting_kuo@aspeedtech.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>

Author: chintingkuo

drivers/watchdog/aspeed_wdt.c

@@ -83,10 +83,24 @@ static const struct aspeed_wdt_config ast2600_config = {
 	.num_reset_masks = 2,
 };
 
+static const struct aspeed_wdt_config ast2700_config = {
+	.ext_pulse_width_mask = 0xfffff,
+	.irq_shift = 0,
+	.irq_mask = GENMASK(31, 10),
+	.scu = {
+		.compatible = "aspeed,ast2700-scu0",
+		.reset_status_reg = 0x70,
+		.wdt_reset_mask = 0xf,
+		.wdt_reset_mask_shift = 0,
+	},
+	.num_reset_masks = 5,
+};
+
 static const struct of_device_id aspeed_wdt_of_table[] = {
 	{ .compatible = "aspeed,ast2400-wdt", .data = &ast2400_config },
 	{ .compatible = "aspeed,ast2500-wdt", .data = &ast2500_config },
 	{ .compatible = "aspeed,ast2600-wdt", .data = &ast2600_config },
+	{ .compatible = "aspeed,ast2700-wdt", .data = &ast2700_config },
 	{ },
 };
 MODULE_DEVICE_TABLE(of, aspeed_wdt_of_table);
@@ -483,7 +497,7 @@ static int aspeed_wdt_probe(struct platform_device *pdev)
 	}
 
 	if (!of_device_is_compatible(np, "aspeed,ast2400-wdt")) {
-		u32 reset_mask[2];
+		u32 reset_mask[5];
 		size_t nrstmask = wdt->cfg->num_reset_masks;
 		u32 reg = readl(wdt->base + WDT_RESET_WIDTH);
 		int i;