linux-kernel - [PATCH net-next 3/5] net: stmmac: imx: Use syscon_regmap_lookup_by_phandle

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Message-Id: <20250112-syscon-phandle-args-net-v1-3-3423889935f7@linaro.org>
Date: Sun, 12 Jan 2025 14:32:45 +0100
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: MD Danish Anwar <danishanwar@...com>, Roger Quadros <rogerq@...nel.org>, 
 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>, 
 Alexandre Torgue <alexandre.torgue@...s.st.com>, 
 Jose Abreu <joabreu@...opsys.com>, 
 Maxime Coquelin <mcoquelin.stm32@...il.com>, 
 Shawn Guo <shawnguo@...nel.org>, Sascha Hauer <s.hauer@...gutronix.de>, 
 Pengutronix Kernel Team <kernel@...gutronix.de>, 
 Fabio Estevam <festevam@...il.com>
Cc: linux-arm-kernel@...ts.infradead.org, netdev@...r.kernel.org, 
 linux-kernel@...r.kernel.org, linux-stm32@...md-mailman.stormreply.com, 
 imx@...ts.linux.dev, Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Subject: [PATCH net-next 3/5] net: stmmac: imx: Use
 syscon_regmap_lookup_by_phandle_args

Use syscon_regmap_lookup_by_phandle_args() which is a wrapper over
syscon_regmap_lookup_by_phandle() combined with getting the syscon
argument.  Except simpler code this annotates within one line that given
phandle has arguments, so grepping for code would be easier.

There is also no real benefit in printing errors on missing syscon
argument, because this is done just too late: runtime check on
static/build-time data.  Dtschema and Devicetree bindings offer the
static/build-time check for this already.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
---
 drivers/net/ethernet/stmicro/stmmac/dwmac-imx.c | 10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-imx.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-imx.c
index 4ac7a78f4b14b95169787538b56dad7f7fe162d3..20d3a202bb8d16743ba4f31fa8ebf19a246e8236 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-imx.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-imx.c
@@ -302,15 +302,11 @@ imx_dwmac_parse_dt(struct imx_priv_data *dwmac, struct device *dev)
 		 * is required by i.MX8MP, i.MX93.
 		 * is optinoal for i.MX8DXL.
 		 */
-		dwmac->intf_regmap = syscon_regmap_lookup_by_phandle(np, "intf_mode");
+		dwmac->intf_regmap =
+			syscon_regmap_lookup_by_phandle_args(np, "intf_mode", 1,
+							     &dwmac->intf_reg_off);
 		if (IS_ERR(dwmac->intf_regmap))
 			return PTR_ERR(dwmac->intf_regmap);
-
-		err = of_property_read_u32_index(np, "intf_mode", 1, &dwmac->intf_reg_off);
-		if (err) {
-			dev_err(dev, "Can't get intf mode reg offset (%d)\n", err);
-			return err;
-		}
 	}

 	return err;

-- 
2.43.0