drivers: atmel_rtc: update to compatible with sama7g5

Add the compatible string to device match table for sama7g5.
As RTC is always secure for sama7g5 no need to configure
its security through matrix.

Signed-off-by: Tony Han <tony.han@microchip.com>
Acked-by: Jens Wiklander <jens.wiklander@linaro.org>
Reviewed-by: Akshay Bhat <akshay.bhat@timesys.com>

core/drivers/atmel_rtc.c

@@ -281,8 +281,11 @@ static struct rtc atmel_rtc = {
 	.range_max = { 2099, 12, 31, 23, 59, 59, 0 },
 };
 
+/* Non-null reference for compat data */
+static const uint8_t rtc_always_secure;
+
 static TEE_Result atmel_rtc_probe(const void *fdt, int node,
-				  const void *compat_data __unused)
+				  const void *compat_data)
 {
 	size_t size = 0;
 
@@ -292,7 +295,8 @@ static TEE_Result atmel_rtc_probe(const void *fdt, int node,
 	if (fdt_get_status(fdt, node) != DT_STATUS_OK_SEC)
 		return TEE_ERROR_BAD_PARAMETERS;
 
-	matrix_configure_periph_secure(AT91C_ID_SYS);
+	if (compat_data != &rtc_always_secure)
+		matrix_configure_periph_secure(AT91C_ID_SYS);
 
 	if (dt_map_dev(fdt, node, &rtc_base, &size, DT_MAP_AUTO) < 0)
 		return TEE_ERROR_GENERIC;
@@ -309,6 +313,10 @@ static TEE_Result atmel_rtc_probe(const void *fdt, int node,
 
 static const struct dt_device_match atmel_rtc_match_table[] = {
 	{ .compatible = "atmel,sama5d2-rtc" },
+	{
+		.compatible = "microchip,sama7g5-rtc",
+		.compat_data = &rtc_always_secure,
+	},
 	{ }
 };