power: reset: brcmstb: Use syscon_regmap_lookup_by_phandle_args() helper

Simplify probe by fetching the regmap and its arguments in one call.
Signed-off-by: Andrew Davis <afd@ti.com>
Reviewed-by: Dhruva Gole <d-gole@ti.com>
Acked-by: Florian Fainelli <florian.fainelli@broadcom.com>
Link: https://lore.kernel.org/r/20240610142836.168603-3-afd@ti.comSigned-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>

drivers/power/reset/brcmstb-reboot.c

@@ -18,9 +18,6 @@
 #include <linux/smp.h>
 #include <linux/mfd/syscon.h>
 
-#define RESET_SOURCE_ENABLE_REG 1
-#define SW_MASTER_RESET_REG 2
-
 static struct regmap *regmap;
 static u32 rst_src_en;
 static u32 sw_mstr_rst;
@@ -87,6 +84,7 @@ static int brcmstb_reboot_probe(struct platform_device *pdev)
 {
 	int rc;
 	struct device_node *np = pdev->dev.of_node;
+	unsigned int args[2];
 
 	reset_masks = device_get_match_data(&pdev->dev);
 	if (!reset_masks) {
@@ -94,25 +92,13 @@ static int brcmstb_reboot_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
-	regmap = syscon_regmap_lookup_by_phandle(np, "syscon");
+	regmap = syscon_regmap_lookup_by_phandle_args(np, "syscon", ARRAY_SIZE(args), args);
 	if (IS_ERR(regmap)) {
 		pr_err("failed to get syscon phandle\n");
 		return -EINVAL;
 	}
-
-	rc = of_property_read_u32_index(np, "syscon", RESET_SOURCE_ENABLE_REG,
-					&rst_src_en);
-	if (rc) {
-		pr_err("can't get rst_src_en offset (%d)\n", rc);
-		return -EINVAL;
-	}
-
-	rc = of_property_read_u32_index(np, "syscon", SW_MASTER_RESET_REG,
-					&sw_mstr_rst);
-	if (rc) {
-		pr_err("can't get sw_mstr_rst offset (%d)\n", rc);
-		return -EINVAL;
-	}
+	rst_src_en = args[0];
+	sw_mstr_rst = args[1];
 
 	rc = register_restart_handler(&brcmstb_restart_nb);
 	if (rc)