30 lines
1.1 KiB
Diff
30 lines
1.1 KiB
Diff
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From b3cb099f8b0cbe56fcfbb4fb9c7cce48afff41f0 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Emilio=20L=C3=B3pez?= <emilio@elopez.com.ar>
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Date: Fri, 20 Sep 2013 22:03:10 -0300
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Subject: [PATCH] clk: sunxi: factors: fix off-by-one masks
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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The previous code would generate one bit too long masks, and was
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needlessly complicated. This patch replaces it by simpler code that can
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generate the masks correctly.
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Signed-off-by: Emilio López <emilio@elopez.com.ar>
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Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
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---
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drivers/clk/sunxi/clk-factors.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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--- a/drivers/clk/sunxi/clk-factors.c
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+++ b/drivers/clk/sunxi/clk-factors.c
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@@ -40,7 +40,7 @@ struct clk_factors {
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#define to_clk_factors(_hw) container_of(_hw, struct clk_factors, hw)
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-#define SETMASK(len, pos) (((-1U) >> (31-len)) << (pos))
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+#define SETMASK(len, pos) (((1U << (len)) - 1) << (pos))
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#define CLRMASK(len, pos) (~(SETMASK(len, pos)))
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#define FACTOR_GET(bit, len, reg) (((reg) & SETMASK(len, bit)) >> (bit))
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