linux-kernel - [PATCH v2 3/4] memory: renesas-rpc-if: Add RZ/A1 and RZ/A2 support

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Message-Id: <175232759314.19062.13901247607746044271.sendpatchset@1.0.0.127.in-addr.arpa>
Date: Sat, 12 Jul 2025 15:39:53 +0200
From: Magnus Damm <damm@...nsource.se>
To: linux-renesas-soc@...r.kernel.org
Cc: robh@...nel.org,Magnus Damm <damm@...nsource.se>,geert+renesas@...der.be,devicetree@...r.kernel.org,conor+dt@...nel.org,krzk@...nel.org,linux-kernel@...r.kernel.org,wsa+renesas@...g-engineering.com,sergei.shtylyov@...il.com,p.zabel@...gutronix.de
Subject: [PATCH v2 3/4] memory: renesas-rpc-if: Add RZ/A1 and RZ/A2 support

From: Magnus Damm <damm@...nsource.se>

Add RZ/A1 and RZ/A2 compat strings to the rpc-if driver. Also make the
reset controller optional. This is because RZ/A1 does not have any reset
bits assigned to the device so there is no reset controller available.

Signed-off-by: Magnus Damm <damm@...nsource.se>
---

 Changes since v1:
 - New patch

 Applies to next-20250710

 drivers/memory/renesas-rpc-if.c |   15 ++++++++++++---
 include/memory/renesas-rpc-if.h |    1 +
 2 files changed, 13 insertions(+), 3 deletions(-)

--- 0001/drivers/memory/renesas-rpc-if.c
+++ work/drivers/memory/renesas-rpc-if.c	2025-07-11 03:45:25.605098312 +0900
@@ -234,7 +234,7 @@ static int rpcif_hw_init_impl(struct rpc
 	int ret;
 
 	if (rpc->info->type == RPCIF_RZ_G2L) {
-		ret = reset_control_reset(rpc->rstc);
+		ret = rpc->rstc ? reset_control_reset(rpc->rstc) : 0;
 		if (ret)
 			return ret;
 		usleep_range(200, 300);
@@ -614,7 +614,7 @@ static int rpcif_manual_xfer_impl(struct
 	return ret;
 
 err_out:
-	if (reset_control_reset(rpc->rstc))
+	if (rpc->rstc && reset_control_reset(rpc->rstc))
 		dev_err(rpc->dev, "Failed to reset HW\n");
 	rpcif_hw_init_impl(rpc, rpc->bus_size == 2);
 	return ret;
@@ -1017,7 +1017,7 @@ static int rpcif_probe(struct platform_d
 	rpc->size = resource_size(res);
 	rpc->rstc = devm_reset_control_array_get_exclusive(dev);
 	if (IS_ERR(rpc->rstc))
-		return PTR_ERR(rpc->rstc);
+		rpc->rstc = NULL;
 
 	/*
 	 * The enabling/disabling of spi/spix2 clocks at runtime leading to
@@ -1115,7 +1115,16 @@ static const struct rpcif_info xspi_info
 	.type = XSPI_RZ_G3E,
 };
 
+static const struct rpcif_info rpcif_info_rz_a = {
+	.regmap_config = &rpcif_regmap_config,
+	.impl = &rpcif_impl,
+	.type = RPCIF_RZ_A,
+	.strtim = 7,
+};
+
 static const struct of_device_id rpcif_of_match[] = {
+	{ .compatible = "renesas,r7s72100-rpc-if", .data = &rpcif_info_rz_a },
+	{ .compatible = "renesas,r7s9210-rpc-if", .data = &rpcif_info_rz_a },
 	{ .compatible = "renesas,r8a7796-rpc-if", .data = &rpcif_info_r8a7796 },
 	{ .compatible = "renesas,r9a09g047-xspi", .data = &xspi_info_r9a09g047 },
 	{ .compatible = "renesas,rcar-gen3-rpc-if", .data = &rpcif_info_gen3 },
--- 0001/include/memory/renesas-rpc-if.h
+++ work/include/memory/renesas-rpc-if.h	2025-07-11 03:38:33.472749814 +0900
@@ -62,6 +62,7 @@ enum rpcif_type {
 	RPCIF_RCAR_GEN4,
 	RPCIF_RZ_G2L,
 	XSPI_RZ_G3E,
+	RPCIF_RZ_A,
 };
 
 struct rpcif {