linux-kernel - [PATCH 4.9 113/177] rtc: pcf8563: fix output clock rate

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Date:   Mon, 18 Dec 2017 16:48:56 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Philipp Zabel <p.zabel@...gutronix.de>,
        Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
        Sasha Levin <alexander.levin@...izon.com>
Subject: [PATCH 4.9 113/177] rtc: pcf8563: fix output clock rate

4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Philipp Zabel <p.zabel@...gutronix.de>


[ Upstream commit a3350f9c57ffad569c40f7320b89da1f3061c5bb ]

The pcf8563_clkout_recalc_rate function erroneously ignores the
frequency index read from the CLKO register and always returns
32768 Hz.

Fixes: a39a6405d5f9 ("rtc: pcf8563: add CLKOUT to common clock framework")
Signed-off-by: Philipp Zabel <p.zabel@...gutronix.de>
Signed-off-by: Alexandre Belloni <alexandre.belloni@...e-electrons.com>
Signed-off-by: Sasha Levin <alexander.levin@...izon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/rtc/rtc-pcf8563.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/rtc/rtc-pcf8563.c
+++ b/drivers/rtc/rtc-pcf8563.c
@@ -422,7 +422,7 @@ static unsigned long pcf8563_clkout_reca
 		return 0;
 
 	buf &= PCF8563_REG_CLKO_F_MASK;
-	return clkout_rates[ret];
+	return clkout_rates[buf];
 }
 
 static long pcf8563_clkout_round_rate(struct clk_hw *hw, unsigned long rate,