linux-kernel - [PATCH 10/13] clk: mediatek: reset: Return mtk

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Date:   Wed,  4 May 2022 16:25:59 +0400
From:   Yassine Oudjana <yassine.oudjana@...il.com>
To:     Matthias Brugger <matthias.bgg@...il.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
Cc:     Yassine Oudjana <y.oudjana@...tonmail.com>,
        Yassine Oudjana <yassine.oudjana@...il.com>,
        Chun-Jie Chen <chun-jie.chen@...iatek.com>,
        Chen-Yu Tsai <wenst@...omium.org>,
        Tinghan Shen <tinghan.shen@...iatek.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Weiyi Lu <weiyi.lu@...iatek.com>,
        Ikjoon Jang <ikjn@...omium.org>,
        Miles Chen <miles.chen@...iatek.com>,
        Sam Shih <sam.shih@...iatek.com>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-clk@...r.kernel.org, linux-mediatek@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org
Subject: [PATCH 10/13] clk: mediatek: reset: Return mtk_reset pointer on register

From: Yassine Oudjana <y.oudjana@...tonmail.com>

Return a struct mtk_reset* when registering a reset controller
in preparation for adding an unregister helper that will take
it as an argument.

Signed-off-by: Yassine Oudjana <y.oudjana@...tonmail.com>
---
 drivers/clk/mediatek/clk-mtk.h |  6 +++---
 drivers/clk/mediatek/reset.c   | 22 ++++++++++++----------
 2 files changed, 15 insertions(+), 13 deletions(-)

diff --git a/drivers/clk/mediatek/clk-mtk.h b/drivers/clk/mediatek/clk-mtk.h
index bf6565aa7319..317905ec4a36 100644
--- a/drivers/clk/mediatek/clk-mtk.h
+++ b/drivers/clk/mediatek/clk-mtk.h
@@ -190,10 +190,10 @@ void mtk_free_clk_data(struct clk_onecell_data *clk_data);
 struct clk *mtk_clk_register_ref2usb_tx(const char *name,
 			const char *parent_name, void __iomem *reg);
 
-void mtk_register_reset_controller(struct device_node *np,
-			unsigned int num_regs, int regofs);
+struct mtk_reset *mtk_register_reset_controller(struct device_node *np,
+	unsigned int num_regs, int regofs);
 
-void mtk_register_reset_controller_set_clr(struct device_node *np,
+struct mtk_reset *mtk_register_reset_controller_set_clr(struct device_node *np,
 	unsigned int num_regs, int regofs);
 
 struct mtk_clk_desc {
diff --git a/drivers/clk/mediatek/reset.c b/drivers/clk/mediatek/reset.c
index 6c2effe6afef..f853bc8a7092 100644
--- a/drivers/clk/mediatek/reset.c
+++ b/drivers/clk/mediatek/reset.c
@@ -90,9 +90,9 @@ static const struct reset_control_ops mtk_reset_ops_set_clr = {
 	.reset = mtk_reset_set_clr,
 };
 
-static void mtk_register_reset_controller_common(struct device_node *np,
-			unsigned int num_regs, int regofs,
-			const struct reset_control_ops *reset_ops)
+static struct mtk_reset *mtk_register_reset_controller_common(
+	struct device_node *np,	unsigned int num_regs, int regofs,
+	const struct reset_control_ops *reset_ops)
 {
 	struct mtk_reset *data;
 	int ret;
@@ -101,12 +101,12 @@ static void mtk_register_reset_controller_common(struct device_node *np,
 	regmap = device_node_to_regmap(np);
 	if (IS_ERR(regmap)) {
 		pr_err("Cannot find regmap for %pOF: %pe\n", np, regmap);
-		return;
+		return (struct mtk_reset *)regmap;
 	}
 
 	data = kzalloc(sizeof(*data), GFP_KERNEL);
 	if (!data)
-		return;
+		return ERR_PTR(-ENOMEM);
 
 	data->regmap = regmap;
 	data->regofs = regofs;
@@ -119,22 +119,24 @@ static void mtk_register_reset_controller_common(struct device_node *np,
 	if (ret) {
 		pr_err("could not register reset controller: %d\n", ret);
 		kfree(data);
-		return;
+		return ERR_PTR(ret);
 	}
+
+	return data;
 }
 
-void mtk_register_reset_controller(struct device_node *np,
+struct mtk_reset *mtk_register_reset_controller(struct device_node *np,
 	unsigned int num_regs, int regofs)
 {
-	mtk_register_reset_controller_common(np, num_regs, regofs,
+	return mtk_register_reset_controller_common(np, num_regs, regofs,
 		&mtk_reset_ops);
 }
 EXPORT_SYMBOL_GPL(mtk_register_reset_controller);
 
-void mtk_register_reset_controller_set_clr(struct device_node *np,
+struct mtk_reset *mtk_register_reset_controller_set_clr(struct device_node *np,
 	unsigned int num_regs, int regofs)
 {
-	mtk_register_reset_controller_common(np, num_regs, regofs,
+	return mtk_register_reset_controller_common(np, num_regs, regofs,
 		&mtk_reset_ops_set_clr);
 }
 EXPORT_SYMBOL_GPL(mtk_register_reset_controller_set_clr);
-- 
2.36.0