From: Cosmin Tanislav <cosmin-gabriel.tanislav.xa@renesas.com>
Date: Mon, 5 Jan 2026 11:44:45 +0000 (+0200)
Subject: dmaengine: sh: rz_dmac: add RZ/{T2H,N2H} support
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=c03d8b5462bcb0022f9477d09eb37dae66c3a769;p=thirdparty%2Fkernel%2Flinux.git

dmaengine: sh: rz_dmac: add RZ/{T2H,N2H} support

The Renesas RZ/T2H (R9A09G077) and RZ/N2H (R9A09G087) SoCs use a
completely different ICU unit compared to RZ/V2H, which requires a
separate implementation.

Add support for them.

RZ/N2H will use RZ/T2H as a fallback.

Signed-off-by: Cosmin Tanislav <cosmin-gabriel.tanislav.xa@renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20260105114445.878262-5-cosmin-gabriel.tanislav.xa@renesas.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---

diff --git a/drivers/dma/sh/rz-dmac.c b/drivers/dma/sh/rz-dmac.c
index c6018e03a08c9..c75e9202e2394 100644
--- a/drivers/dma/sh/rz-dmac.c
+++ b/drivers/dma/sh/rz-dmac.c
@@ -15,6 +15,7 @@
 #include <linux/interrupt.h>
 #include <linux/iopoll.h>
 #include <linux/irqchip/irq-renesas-rzv2h.h>
+#include <linux/irqchip/irq-renesas-rzt2h.h>
 #include <linux/list.h>
 #include <linux/module.h>
 #include <linux/of.h>
@@ -1072,12 +1073,18 @@ static const struct rz_dmac_info rz_dmac_v2h_info = {
 	.default_dma_req_no = RZV2H_ICU_DMAC_REQ_NO_DEFAULT,
 };
 
+static const struct rz_dmac_info rz_dmac_t2h_info = {
+	.icu_register_dma_req = rzt2h_icu_register_dma_req,
+	.default_dma_req_no = RZT2H_ICU_DMAC_REQ_NO_DEFAULT,
+};
+
 static const struct rz_dmac_info rz_dmac_generic_info = {
 	.default_dma_req_no = 0,
 };
 
 static const struct of_device_id of_rz_dmac_match[] = {
 	{ .compatible = "renesas,r9a09g057-dmac", .data = &rz_dmac_v2h_info },
+	{ .compatible = "renesas,r9a09g077-dmac", .data = &rz_dmac_t2h_info },
 	{ .compatible = "renesas,rz-dmac", .data = &rz_dmac_generic_info },
 	{ /* Sentinel */ }
 };