linux-kernel - [PATCH v3 2/4] clk: mediatek: Provide mtk_devm_alloc_clk

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Date:   Thu, 11 Aug 2022 10:44:31 +0200
From:   Markus Schneider-Pargmann <msp@...libre.com>
To:     Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Fabien Parent <parent.f@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
Cc:     linux-clk@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Markus Schneider-Pargmann <msp@...libre.com>
Subject: [PATCH v3 2/4] clk: mediatek: Provide mtk_devm_alloc_clk_data

Provide a helper that replaces the kzalloc with devm_kzalloc so error
handling gets easier.

Signed-off-by: Markus Schneider-Pargmann <msp@...libre.com>
---

Notes:
    Changes in v3:
    - New patch

 drivers/clk/mediatek/clk-mtk.c | 33 ++++++++++++++++++++++++++++-----
 drivers/clk/mediatek/clk-mtk.h |  2 ++
 2 files changed, 30 insertions(+), 5 deletions(-)

diff --git a/drivers/clk/mediatek/clk-mtk.c b/drivers/clk/mediatek/clk-mtk.c
index b9188000ab3c..a317e69cf298 100644
--- a/drivers/clk/mediatek/clk-mtk.c
+++ b/drivers/clk/mediatek/clk-mtk.c
@@ -18,19 +18,42 @@
 #include "clk-mtk.h"
 #include "clk-gate.h"
 
-struct clk_hw_onecell_data *mtk_alloc_clk_data(unsigned int clk_num)
+static void mtk_init_clk_data(struct clk_hw_onecell_data *clk_data,
+			      unsigned int clk_num)
 {
 	int i;
+
+	clk_data->num = clk_num;
+
+	for (i = 0; i < clk_num; i++)
+		clk_data->hws[i] = ERR_PTR(-ENOENT);
+}
+
+struct clk_hw_onecell_data *mtk_devm_alloc_clk_data(struct device *dev,
+						    unsigned int clk_num)
+{
 	struct clk_hw_onecell_data *clk_data;
 
-	clk_data = kzalloc(struct_size(clk_data, hws, clk_num), GFP_KERNEL);
+	clk_data = devm_kzalloc(dev, struct_size(clk_data, hws, clk_num),
+				GFP_KERNEL);
 	if (!clk_data)
 		return NULL;
 
-	clk_data->num = clk_num;
+	mtk_init_clk_data(clk_data, clk_num);
 
-	for (i = 0; i < clk_num; i++)
-		clk_data->hws[i] = ERR_PTR(-ENOENT);
+	return clk_data;
+}
+EXPORT_SYMBOL_GPL(mtk_devm_alloc_clk_data);
+
+struct clk_hw_onecell_data *mtk_alloc_clk_data(unsigned int clk_num)
+{
+	struct clk_hw_onecell_data *clk_data;
+
+	clk_data = kzalloc(struct_size(clk_data, hws, clk_num), GFP_KERNEL);
+	if (!clk_data)
+		return NULL;
+
+	mtk_init_clk_data(clk_data, clk_num);
 
 	return clk_data;
 }
diff --git a/drivers/clk/mediatek/clk-mtk.h b/drivers/clk/mediatek/clk-mtk.h
index adb1304d35d4..4390058d172c 100644
--- a/drivers/clk/mediatek/clk-mtk.h
+++ b/drivers/clk/mediatek/clk-mtk.h
@@ -182,6 +182,8 @@ void mtk_clk_unregister_dividers(const struct mtk_clk_divider *mcds, int num,
 				 struct clk_hw_onecell_data *clk_data);
 
 struct clk_hw_onecell_data *mtk_alloc_clk_data(unsigned int clk_num);
+struct clk_hw_onecell_data *mtk_devm_alloc_clk_data(struct device *dev,
+						    unsigned int clk_num);
 void mtk_free_clk_data(struct clk_hw_onecell_data *clk_data);
 
 struct clk_hw *mtk_clk_register_ref2usb_tx(const char *name,
-- 
2.36.1