iommu/ipmmu-vmsa: Add support for R-Car Gen4

Add support for R-Car Gen4 like r8a779f0 (R-Car S4-8). The IPMMU
hardware design of r8a779f0 is the same as r8a779a0. So, rename
"r8a779a0" to "rcar_gen4".

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20220208002030.1319984-3-yoshihiro.shimoda.uh@renesas.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>

drivers/iommu/ipmmu-vmsa.c

@@ -719,6 +719,7 @@ static int ipmmu_init_platform_device(struct device *dev,
 
 static const struct soc_device_attribute soc_needs_opt_in[] = {
 	{ .family = "R-Car Gen3", },
+	{ .family = "R-Car Gen4", },
 	{ .family = "RZ/G2", },
 	{ /* sentinel */ }
 };
@@ -743,7 +744,7 @@ static bool ipmmu_device_is_allowed(struct device *dev)
 	unsigned int i;
 
 	/*
-	 * R-Car Gen3 and RZ/G2 use the allow list to opt-in devices.
+	 * R-Car Gen3/4 and RZ/G2 use the allow list to opt-in devices.
 	 * For Other SoCs, this returns true anyway.
 	 */
 	if (!soc_device_match(soc_needs_opt_in))
@@ -926,7 +927,7 @@ static const struct ipmmu_features ipmmu_features_rcar_gen3 = {
 	.utlb_offset_base = 0,
 };
 
-static const struct ipmmu_features ipmmu_features_r8a779a0 = {
+static const struct ipmmu_features ipmmu_features_rcar_gen4 = {
 	.use_ns_alias_offset = false,
 	.has_cache_leaf_nodes = true,
 	.number_of_contexts = 16,
@@ -982,7 +983,10 @@ static const struct of_device_id ipmmu_of_ids[] = {
 		.data = &ipmmu_features_rcar_gen3,
 	}, {
 		.compatible = "renesas,ipmmu-r8a779a0",
-		.data = &ipmmu_features_r8a779a0,
+		.data = &ipmmu_features_rcar_gen4,
+	}, {
+		.compatible = "renesas,rcar-gen4-ipmmu",
+		.data = &ipmmu_features_rcar_gen4,
 	}, {
 		/* Terminator */
 	},