linux-kernel - [PATCH 5.12 080/700] clk: k210: Fix k210_clk_set

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Message-Id: <20210712060935.997867660@linuxfoundation.org>
Date:   Mon, 12 Jul 2021 08:02:43 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Damien Le Moal <damien.lemoal@....com>,
        Stephen Boyd <sboyd@...nel.org>
Subject: [PATCH 5.12 080/700] clk: k210: Fix k210_clk_set_parent()

From: Damien Le Moal <damien.lemoal@....com>

commit faa0e307948594b4379a86fff7fb2409067aed6f upstream.

In k210_clk_set_parent(), add missing writel() call to update the mux
register of a clock to change its parent. This also fixes a compilation
warning with clang when compiling with W=1.

Fixes: c6ca7616f7d5 ("clk: Add RISC-V Canaan Kendryte K210 clock driver")
Cc: stable@...r.kernel.org
Signed-off-by: Damien Le Moal <damien.lemoal@....com>
Link: https://lore.kernel.org/r/20210622064502.14841-1-damien.lemoal@wdc.com
Signed-off-by: Stephen Boyd <sboyd@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/clk/clk-k210.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/clk/clk-k210.c
+++ b/drivers/clk/clk-k210.c
@@ -722,6 +722,7 @@ static int k210_clk_set_parent(struct cl
 		reg |= BIT(cfg->mux_bit);
 	else
 		reg &= ~BIT(cfg->mux_bit);
+	writel(reg, ksc->regs + cfg->mux_reg);
 	spin_unlock_irqrestore(&ksc->clk_lock, flags);
 
 	return 0;