linux-kernel - [PATCH v4 4/6] clk: ti: divider: switch to GENMASK()

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Message-Id: <1436460234-61425-5-git-send-email-andriy.shevchenko@linux.intel.com>
Date:	Thu,  9 Jul 2015 19:43:52 +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 v4 4/6] clk: ti: divider: switch to GENMASK()

Convert the code to use GENMASK() helper instead of div_mask() macro.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 drivers/clk/ti/divider.c | 18 ++++++++----------
 1 file changed, 8 insertions(+), 10 deletions(-)

diff --git a/drivers/clk/ti/divider.c b/drivers/clk/ti/divider.c
index ff5f117..dfe485e 100644
--- a/drivers/clk/ti/divider.c
+++ b/drivers/clk/ti/divider.c
@@ -28,8 +28,6 @@
 
 #define to_clk_divider(_hw) container_of(_hw, struct clk_divider, hw)
 
-#define div_mask(d)	((1 << ((d)->width)) - 1)
-
 static unsigned int _get_table_maxdiv(const struct clk_div_table *table)
 {
 	unsigned int maxdiv = 0;
@@ -44,12 +42,12 @@ static unsigned int _get_table_maxdiv(const struct clk_div_table *table)
 static unsigned int _get_maxdiv(struct clk_divider *divider)
 {
 	if (divider->flags & CLK_DIVIDER_ONE_BASED)
-		return div_mask(divider);
+		return GENMASK(divider->width - 1, 0);
 	if (divider->flags & CLK_DIVIDER_POWER_OF_TWO)
-		return 1 << div_mask(divider);
+		return 1 << GENMASK(divider->width - 1, 0);
 	if (divider->table)
 		return _get_table_maxdiv(divider->table);
-	return div_mask(divider) + 1;
+	return BIT(divider->width);
 }
 
 static unsigned int _get_table_div(const struct clk_div_table *table,
@@ -103,7 +101,7 @@ static unsigned long ti_clk_divider_recalc_rate(struct clk_hw *hw,
 	unsigned int div, val;
 
 	val = ti_clk_ll_ops->clk_readl(divider->reg) >> divider->shift;
-	val &= div_mask(divider);
+	val &= GENMASK(divider->width - 1, 0);
 
 	div = _get_div(divider, val);
 	if (!div) {
@@ -225,17 +223,17 @@ static int ti_clk_divider_set_rate(struct clk_hw *hw, unsigned long rate,
 	div = DIV_ROUND_UP(parent_rate, rate);
 	value = _get_val(divider, div);
 
-	if (value > div_mask(divider))
-		value = div_mask(divider);
+	if (value > GENMASK(divider->width - 1, 0))
+		value = GENMASK(divider->width - 1, 0);
 
 	if (divider->lock)
 		spin_lock_irqsave(divider->lock, flags);
 
 	if (divider->flags & CLK_DIVIDER_HIWORD_MASK) {
-		val = div_mask(divider) << (divider->shift + 16);
+		val = GENMASK(divider->width - 1, 0) << (divider->shift + 16);
 	} else {
 		val = ti_clk_ll_ops->clk_readl(divider->reg);
-		val &= ~(div_mask(divider) << divider->shift);
+		val &= ~(GENMASK(divider->width - 1, 0) << divider->shift);
 	}
 	val |= value << divider->shift;
 	ti_clk_ll_ops->clk_writel(val, divider->reg);
-- 
2.1.4

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