linux-kernel - [PATCH RFT net-next 04/10] soc: sunxi: sram: register regmap as syscon

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Message-Id: <20250701165756.258356-5-wens@kernel.org>
Date: Wed,  2 Jul 2025 00:57:50 +0800
From: Chen-Yu Tsai <wens@...nel.org>
To: Andrew Lunn <andrew+netdev@...n.ch>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Chen-Yu Tsai <wens@...e.org>,
	Jernej Skrabec <jernej@...nel.org>,
	Samuel Holland <samuel@...lland.org>
Cc: netdev@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-sunxi@...ts.linux.dev,
	linux-kernel@...r.kernel.org,
	Andre Przywara <andre.przywara@....com>
Subject: [PATCH RFT net-next 04/10] soc: sunxi: sram: register regmap as syscon

From: Chen-Yu Tsai <wens@...e.org>

Until now, if the system controller had a ethernet controller glue layer
control register, a limited access regmap would be registered and tied
to the system controller struct device for the ethernet driver to use.

Signed-off-by: Chen-Yu Tsai <wens@...e.org>
---
 drivers/soc/sunxi/sunxi_sram.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/soc/sunxi/sunxi_sram.c b/drivers/soc/sunxi/sunxi_sram.c
index 4f8d510b7e1e..63c23bdffa78 100644
--- a/drivers/soc/sunxi/sunxi_sram.c
+++ b/drivers/soc/sunxi/sunxi_sram.c
@@ -12,6 +12,7 @@
 
 #include <linux/debugfs.h>
 #include <linux/io.h>
+#include <linux/mfd/syscon.h>
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/of_address.h>
@@ -377,6 +378,7 @@ static int __init sunxi_sram_probe(struct platform_device *pdev)
 	const struct sunxi_sramc_variant *variant;
 	struct device *dev = &pdev->dev;
 	struct regmap *regmap;
+	int ret;
 
 	sram_dev = &pdev->dev;
 
@@ -394,6 +396,10 @@ static int __init sunxi_sram_probe(struct platform_device *pdev)
 		regmap = devm_regmap_init_mmio(dev, base, &sunxi_sram_regmap_config);
 		if (IS_ERR(regmap))
 			return PTR_ERR(regmap);
+
+		ret = of_syscon_register_regmap(dev->of_node, regmap);
+		if (IS_ERR(ret))
+			return ret;
 	}
 
 	of_platform_populate(dev->of_node, NULL, NULL, dev);
-- 
2.39.5