linux-kernel - [PATCH AUTOSEL 5.17 18/48] ARM: OMAP1: clock: Fix UART rate reporting algorithm

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Message-Id: <20220601135421.2003328-18-sashal@kernel.org>
Date:   Wed,  1 Jun 2022 09:53:51 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Janusz Krzysztofik <jmkrzyszt@...il.com>,
        Tony Lindgren <tony@...mide.com>,
        Arnd Bergmann <arnd@...db.de>, Sasha Levin <sashal@...nel.org>,
        paul@...an.com, aaro.koskinen@....fi, linux@...linux.org.uk,
        linux-omap@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: [PATCH AUTOSEL 5.17 18/48] ARM: OMAP1: clock: Fix UART rate reporting algorithm

From: Janusz Krzysztofik <jmkrzyszt@...il.com>

[ Upstream commit 338d5d476cde853dfd97378d20496baabc2ce3c0 ]

Since its introduction to the mainline kernel, omap1_uart_recalc() helper
makes incorrect use of clk->enable_bit as a ready to use bitmap mask while
it only provides the bit number.  Fix it.

Signed-off-by: Janusz Krzysztofik <jmkrzyszt@...il.com>
Acked-by: Tony Lindgren <tony@...mide.com>
Signed-off-by: Arnd Bergmann <arnd@...db.de>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/arm/mach-omap1/clock.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/mach-omap1/clock.c b/arch/arm/mach-omap1/clock.c
index 9d4a0ab50a46..d63d5eb8d8fd 100644
--- a/arch/arm/mach-omap1/clock.c
+++ b/arch/arm/mach-omap1/clock.c
@@ -41,7 +41,7 @@ static DEFINE_SPINLOCK(clockfw_lock);
 unsigned long omap1_uart_recalc(struct clk *clk)
 {
 	unsigned int val = __raw_readl(clk->enable_reg);
-	return val & clk->enable_bit ? 48000000 : 12000000;
+	return val & 1 << clk->enable_bit ? 48000000 : 12000000;
 }
 
 unsigned long omap1_sossi_recalc(struct clk *clk)
-- 
2.35.1