[PATCH v3 15/31] clk: mediatek: Implement mtk_clk_unregister_fixed_clks() API

[Chen-Yu Tsai]

mtk_clk_register_fixed_clks(), as the name suggests, is used to register
a given list of fixed rate clks. However it is lacking a counterpart
unregister API.

Implement said unregister API so that the various clock platform drivers
can utilize it to do proper unregistration, cleanup and removal.

In the header file, the register function's declaration is also
reformatted to fit code style guidelines.

Signed-off-by: Chen-Yu Tsai <wenst at chromium.org>
Reviewed-by: Miles Chen <miles.chen at mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno at collabora.com>
---
 drivers/clk/mediatek/clk-mtk.c | 20 ++++++++++++++++++++
 drivers/clk/mediatek/clk-mtk.h |  6 ++++--
 2 files changed, 24 insertions(+), 2 deletions(-)

diff --git a/drivers/clk/mediatek/clk-mtk.c b/drivers/clk/mediatek/clk-mtk.c
index 0c5db3c71fdd..7c0d5706eed7 100644
--- a/drivers/clk/mediatek/clk-mtk.c
+++ b/drivers/clk/mediatek/clk-mtk.c
@@ -80,6 +80,26 @@ void mtk_clk_register_fixed_clks(const struct mtk_fixed_clk *clks,
 }
 EXPORT_SYMBOL_GPL(mtk_clk_register_fixed_clks);
 
+void mtk_clk_unregister_fixed_clks(const struct mtk_fixed_clk *clks, int num,
+				   struct clk_onecell_data *clk_data)
+{
+	int i;
+
+	if (!clk_data)
+		return;
+
+	for (i = num; i > 0; i--) {
+		const struct mtk_fixed_clk *rc = &clks[i - 1];
+
+		if (IS_ERR_OR_NULL(clk_data->clks[rc->id]))
+			continue;
+
+		clk_unregister_fixed_rate(clk_data->clks[rc->id]);
+		clk_data->clks[rc->id] = ERR_PTR(-ENOENT);
+	}
+}
+EXPORT_SYMBOL_GPL(mtk_clk_unregister_fixed_clks);
+
 void mtk_clk_register_factors(const struct mtk_fixed_factor *clks,
 		int num, struct clk_onecell_data *clk_data)
 {
diff --git a/drivers/clk/mediatek/clk-mtk.h b/drivers/clk/mediatek/clk-mtk.h
index 168220f85489..cc7f920eabb4 100644
--- a/drivers/clk/mediatek/clk-mtk.h
+++ b/drivers/clk/mediatek/clk-mtk.h
@@ -34,8 +34,10 @@ struct mtk_fixed_clk {
 		.rate = _rate,				\
 	}
 
-void mtk_clk_register_fixed_clks(const struct mtk_fixed_clk *clks,
-		int num, struct clk_onecell_data *clk_data);
+void mtk_clk_register_fixed_clks(const struct mtk_fixed_clk *clks, int num,
+				 struct clk_onecell_data *clk_data);
+void mtk_clk_unregister_fixed_clks(const struct mtk_fixed_clk *clks, int num,
+				   struct clk_onecell_data *clk_data);
 
 struct mtk_fixed_factor {
 	int id;
-- 
2.35.0.263.gb82422642f-goog