linux-kernel - [PATCH V1 3/3] clk: Loongson1: Make use of GENMASK

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Message-Id: <1474259936-9657-4-git-send-email-keguang.zhang@gmail.com>
Date:   Mon, 19 Sep 2016 12:38:56 +0800
From:   Keguang Zhang <keguang.zhang@...il.com>
To:     linux-clk@...r.kernel.org, linux-mips@...ux-mips.org,
        linux-kernel@...r.kernel.org
Cc:     Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...eaurora.org>,
        Kelvin Cheung <keguang.zhang@...il.com>
Subject: [PATCH V1 3/3] clk: Loongson1: Make use of GENMASK

From: Kelvin Cheung <keguang.zhang@...il.com>

Make use of GENMASK instead of open coding the equivalent operation,
and update the PLL formula.

Signed-off-by: Kelvin Cheung <keguang.zhang@...il.com>
---
 drivers/clk/loongson1/clk-loongson1b.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/clk/loongson1/clk-loongson1b.c b/drivers/clk/loongson1/clk-loongson1b.c
index 4b3d9d2..f36a97e 100644
--- a/drivers/clk/loongson1/clk-loongson1b.c
+++ b/drivers/clk/loongson1/clk-loongson1b.c
@@ -26,7 +26,7 @@ static unsigned long ls1x_pll_recalc_rate(struct clk_hw *hw,
 	u32 pll, rate;
 
 	pll = __raw_readl(LS1X_CLK_PLL_FREQ);
-	rate = 12 + (pll & 0x3f) + (((pll >> 8) & 0x3ff) >> 10);
+	rate = 12 + (pll & GENMASK(5, 0));
 	rate *= OSC;
 	rate >>= 1;
 
-- 
1.9.1