plat/allwinner: do not setup 'disabled' regulators

If a PMIC regulator has its DT node disabled, leave the regulator off.

Change-Id: I895f740328e8f11d485829c3a89a9b9f8e5644be
Signed-off-by: Roman Beranek <roman.beranek@prusa3d.com>

drivers/allwinner/axp/common.c

@@ -96,12 +96,27 @@ static int setup_regulator(const void *fdt, int node,
 	return 0;
 }
 
+static bool is_node_disabled(const void *fdt, int node)
+{
+	const char *cell;
+	cell = fdt_getprop(fdt, node, "status", NULL);
+	if (cell == NULL) {
+		return false;
+	}
+	return strcmp(cell, "okay") != 0;
+}
+
 static bool should_enable_regulator(const void *fdt, int node)
 {
-	if (fdt_getprop(fdt, node, "phandle", NULL) != NULL)
+	if (is_node_disabled(fdt, node)) {
+		return false;
+	}
+	if (fdt_getprop(fdt, node, "phandle", NULL) != NULL) {
 		return true;
-	if (fdt_getprop(fdt, node, "regulator-always-on", NULL) != NULL)
+	}
+	if (fdt_getprop(fdt, node, "regulator-always-on", NULL) != NULL) {
 		return true;
+	}
 	return false;
 }