linux-kernel - [PATCH 4/6] clk: mediatek: mt8192: Avoid duplicate OF clk provider for topckgen

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Message-Id: <20220926102523.2367530-5-wenst@chromium.org>
Date:   Mon, 26 Sep 2022 18:25:21 +0800
From:   Chen-Yu Tsai <wenst@...omium.org>
To:     Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>
Cc:     Chen-Yu Tsai <wenst@...omium.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Miles Chen <miles.chen@...iatek.com>,
        linux-clk@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH 4/6] clk: mediatek: mt8192: Avoid duplicate OF clk provider for topckgen

The MT8192 topckgen clock driver is split into two parts, an early
CLK_OF_DECLARE_DRIVER() part which registers one clock solely for the
system timer, and a standard platform driver part that handles the rest.

In both parts, of_clk_hw_add_provider() is called, causing the clk
provider to be added twice. While this doesn't cause issues, it isn't
clean either.

Remove the existing entry before calling of_clk_hw_add_provider() in
the platform driver probe function. This ensures that there is only
one entry, and the OF related code still runs on the full set of
clocks.

Signed-off-by: Chen-Yu Tsai <wenst@...omium.org>
---
 drivers/clk/mediatek/clk-mt8192.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/clk/mediatek/clk-mt8192.c b/drivers/clk/mediatek/clk-mt8192.c
index e39012583675..c2ce72df6db0 100644
--- a/drivers/clk/mediatek/clk-mt8192.c
+++ b/drivers/clk/mediatek/clk-mt8192.c
@@ -1246,6 +1246,12 @@ static int clk_mt8192_top_probe(struct platform_device *pdev)
 	if (r)
 		return r;
 
+	/*
+	 * Remove clock provider set in clk_mt8192_top_init_early() first
+	 * to avoid duplicate entry, and re-add it so the OF related code
+	 * gets run again with the full set of clocks.
+	 */
+	of_clk_del_provider(node);
 	return of_clk_add_hw_provider(node, of_clk_hw_onecell_get,
 				      top_clk_data);
 }
-- 
2.37.3.998.g577e59143f-goog