linux-kernel - [PATCH] mmc: hi3798mv200: Use syscon_regmap_lookup_by_phandle

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Message-ID: <20250111185410.183896-1-krzysztof.kozlowski@linaro.org>
Date: Sat, 11 Jan 2025 19:54:09 +0100
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Jaehoon Chung <jh80.chung@...sung.com>,
	Ulf Hansson <ulf.hansson@...aro.org>,
	linux-mmc@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Subject: [PATCH] mmc: hi3798mv200: 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/mmc/host/dw_mmc-hi3798mv200.c | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/drivers/mmc/host/dw_mmc-hi3798mv200.c b/drivers/mmc/host/dw_mmc-hi3798mv200.c
index cce174b5249b..5791a975a944 100644
--- a/drivers/mmc/host/dw_mmc-hi3798mv200.c
+++ b/drivers/mmc/host/dw_mmc-hi3798mv200.c
@@ -181,7 +181,6 @@ static int dw_mci_hi3798mv200_init(struct dw_mci *host)
 {
 	struct dw_mci_hi3798mv200_priv *priv;
 	struct device_node *np = host->dev->of_node;
-	int ret;
 
 	priv = devm_kzalloc(host->dev, sizeof(*priv), GFP_KERNEL);
 	if (!priv)
@@ -199,15 +198,12 @@ static int dw_mci_hi3798mv200_init(struct dw_mci *host)
 		return dev_err_probe(host->dev, PTR_ERR(priv->drive_clk),
 				     "failed to get enabled ciu-drive clock\n");
 
-	priv->crg_reg = syscon_regmap_lookup_by_phandle(np, "hisilicon,sap-dll-reg");
+	priv->crg_reg = syscon_regmap_lookup_by_phandle_args(np, "hisilicon,sap-dll-reg",
+							     1, &priv->sap_dll_offset);
 	if (IS_ERR(priv->crg_reg))
 		return dev_err_probe(host->dev, PTR_ERR(priv->crg_reg),
 				     "failed to get CRG reg\n");
 
-	ret = of_property_read_u32_index(np, "hisilicon,sap-dll-reg", 1, &priv->sap_dll_offset);
-	if (ret)
-		return dev_err_probe(host->dev, ret, "failed to get sample DLL register offset\n");
-
 	host->priv = priv;
 	return 0;
 }
-- 
2.43.0