linux-kernel - [PATCH v5 2/8] clk: mmp: switch to GENMASK()

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Message-Id: <1436796468-45723-3-git-send-email-andriy.shevchenko@linux.intel.com>
Date:	Mon, 13 Jul 2015 17:07:42 +0300
From:	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:	linux-kernel@...r.kernel.org, Sascha Hauer <kernel@...gutronix.de>,
	Peter De Schrijver <pdeschrijver@...dia.com>,
	Tero Kristo <t-kristo@...com>,
	Stephen Boyd <sboyd@...eaurora.org>,
	Russell King <linux@....linux.org.uk>,
	Dinh Nguyen <dinguyen@...nsource.altera.com>
Cc:	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: [PATCH v5 2/8] clk: mmp: switch to GENMASK()

Convert the code to use GENMASK() helper instead of custom approach.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 drivers/clk/mmp/clk-mix.c | 2 +-
 drivers/clk/mmp/clk.h     | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/clk/mmp/clk-mix.c b/drivers/clk/mmp/clk-mix.c
index 7a37432..1ff85d7c 100644
--- a/drivers/clk/mmp/clk-mix.c
+++ b/drivers/clk/mmp/clk-mix.c
@@ -26,7 +26,7 @@
 
 static unsigned int _get_maxdiv(struct mmp_clk_mix *mix)
 {
-	unsigned int div_mask = (1 << mix->reg_info.width_div) - 1;
+	unsigned int div_mask = GENMASK(mix->reg_info.width_div - 1, 0);
 	unsigned int maxdiv = 0;
 	struct clk_div_table *clkt;
 
diff --git a/drivers/clk/mmp/clk.h b/drivers/clk/mmp/clk.h
index adf9b71..f5fdb0e 100644
--- a/drivers/clk/mmp/clk.h
+++ b/drivers/clk/mmp/clk.h
@@ -39,7 +39,7 @@ extern struct clk *mmp_clk_register_factor(const char *name,
 
 /* Clock type "mix" */
 #define MMP_CLK_BITS_MASK(width, shift)			\
-		(((1 << (width)) - 1) << (shift))
+		(GENMASK((width) - 1, 0) << (shift))
 #define MMP_CLK_BITS_GET_VAL(data, width, shift)	\
 		((data & MMP_CLK_BITS_MASK(width, shift)) >> (shift))
 #define MMP_CLK_BITS_SET_VAL(val, width, shift)		\
-- 
2.1.4

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