On this SoC, PRR is now inside the MFIS memory block, so we need to
access it similar to e.g. RZ/G2L.

Suggested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
---
 drivers/soc/renesas/renesas-soc.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/soc/renesas/renesas-soc.c b/drivers/soc/renesas/renesas-soc.c
index 38ff0b823bda..60b09020c935 100644
--- a/drivers/soc/renesas/renesas-soc.c
+++ b/drivers/soc/renesas/renesas-soc.c
@@ -442,8 +442,14 @@ static const struct renesas_id id_prr __initconst = {
 	.mask = 0xff00,
 };
 
+static const struct renesas_id id_mfis __initconst = {
+	.offset = 0x44,
+	.mask = 0xff00,
+};
+
 static const struct of_device_id renesas_ids[] __initconst = {
 	{ .compatible = "renesas,bsid",			.data = &id_bsid },
+	{ .compatible = "renesas,r8a78000-mfis",	.data = &id_mfis },
 	{ .compatible = "renesas,r9a07g043-sysc",	.data = &id_rzg2l },
 	{ .compatible = "renesas,r9a07g044-sysc",	.data = &id_rzg2l },
 	{ .compatible = "renesas,r9a07g054-sysc",	.data = &id_rzg2l },
@@ -501,7 +507,7 @@ static int __init renesas_soc_init(void)
 		product = readl(chipid + id->offset);
 		iounmap(chipid);
 
-		if (id == &id_prr) {
+		if (id == &id_prr || id == &id_mfis) {
 			/* R-Car M3-W ES1.1 incorrectly identifies as ES2.0 */
 			if ((product & 0x7fff) == 0x5210)
 				product ^= 0x11;
-- 
2.51.0

On Tue, 17 Mar 2026 at 14:06, Wolfram Sang
<wsa+renesas@sang-engineering.com> wrote:
> On this SoC, PRR is now inside the MFIS memory block, so we need to
> access it similar to e.g. RZ/G2L.
>
> Suggested-by: Geert Uytterhoeven <geert+renesas@glider.be>
> Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
i.e. will queue in renesas-devel, pending acceptance of the DT bindings.

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds