linux-kernel - [PATCH V5 08/16] clk: mediatek: reset: Change return type for clock reset register function

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Message-ID: <20220428115620.13512-9-rex-bc.chen@mediatek.com>
Date:   Thu, 28 Apr 2022 19:56:11 +0800
From:   Rex-BC Chen <rex-bc.chen@...iatek.com>
To:     <mturquette@...libre.com>, <sboyd@...nel.org>,
        <matthias.bgg@...il.com>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>
CC:     <p.zabel@...gutronix.de>,
        <angelogioacchino.delregno@...labora.com>,
        <chun-jie.chen@...iatek.com>, <wenst@...omium.org>,
        <runyang.chen@...iatek.com>, <linux-kernel@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-clk@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        <Project_Global_Chrome_Upstream_Group@...iatek.com>,
        Rex-BC Chen <rex-bc.chen@...iatek.com>
Subject: [PATCH V5 08/16] clk: mediatek: reset: Change return type for clock reset register function

To deal with error handling, we change the function return type from
void to int for mtk_clk_register_rst_ctrl().

Signed-off-by: Rex-BC Chen <rex-bc.chen@...iatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
---
 drivers/clk/mediatek/reset.c | 15 +++++++++------
 drivers/clk/mediatek/reset.h |  6 ++++--
 2 files changed, 13 insertions(+), 8 deletions(-)

diff --git a/drivers/clk/mediatek/reset.c b/drivers/clk/mediatek/reset.c
index 11b2f74f121d..a1d281d2a2d5 100644
--- a/drivers/clk/mediatek/reset.c
+++ b/drivers/clk/mediatek/reset.c
@@ -98,8 +98,8 @@ static const struct reset_control_ops mtk_reset_ops_set_clr = {
 	.reset = mtk_reset_set_clr,
 };
 
-void mtk_register_reset_controller(struct device_node *np,
-				   const struct mtk_clk_rst_desc *desc)
+int mtk_register_reset_controller(struct device_node *np,
+				  const struct mtk_clk_rst_desc *desc)
 {
 	struct regmap *regmap;
 	const struct reset_control_ops *rcops = NULL;
@@ -108,7 +108,7 @@ void mtk_register_reset_controller(struct device_node *np,
 
 	if (!desc) {
 		pr_err("mtk clock reset desc is NULL\n");
-		return;
+		return -EINVAL;
 	}
 
 	switch (desc->version) {
@@ -120,18 +120,18 @@ void mtk_register_reset_controller(struct device_node *np,
 		break;
 	default:
 		pr_err("Unknown reset version %d\n", desc->version);
-		return;
+		return -EINVAL;
 	}
 
 	regmap = device_node_to_regmap(np);
 	if (IS_ERR(regmap)) {
 		pr_err("Cannot find regmap for %pOF: %pe\n", np, regmap);
-		return;
+		return -EINVAL;
 	}
 
 	data = kzalloc(sizeof(*data), GFP_KERNEL);
 	if (!data)
-		return;
+		return -ENOMEM;
 
 	data->desc = desc;
 	data->regmap = regmap;
@@ -144,7 +144,10 @@ void mtk_register_reset_controller(struct device_node *np,
 	if (ret) {
 		pr_err("could not register reset controller: %d\n", ret);
 		kfree(data);
+		return ret;
 	}
+
+	return 0;
 }
 
 MODULE_LICENSE("GPL");
diff --git a/drivers/clk/mediatek/reset.h b/drivers/clk/mediatek/reset.h
index 482df8012c5c..bbd269b0a797 100644
--- a/drivers/clk/mediatek/reset.h
+++ b/drivers/clk/mediatek/reset.h
@@ -51,8 +51,10 @@ struct mtk_clk_rst_data {
  * mtk_register_reset_controller - Register MediaTek clock reset controller
  * @np: Pointer to device node.
  * @desc: Constant pointer to description of clock reset.
+ *
+ * Return: 0 on success and errorno otherwise.
  */
-void mtk_register_reset_controller(struct device_node *np,
-				   const struct mtk_clk_rst_desc *desc);
+int mtk_register_reset_controller(struct device_node *np,
+				  const struct mtk_clk_rst_desc *desc);
 
 #endif /* __DRV_CLK_MTK_RESET_H */
-- 
2.18.0