linux-kernel - [PATCH 1/9] clk: pistachio: Add a pll

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Date:	Thu, 21 May 2015 20:57:35 -0300
From:	Ezequiel Garcia <ezequiel.garcia@...tec.com>
To:	<linux-mips@...ux-mips.org>, <linux-kernel@...r.kernel.org>,
	"Mike Turquette" <mturquette@...aro.org>, <sboyd@...eaurora.org>
CC:	Andrew Bresticker <abrestic@...omium.org>,
	James Hartley <james.hartley@...tec.com>,
	<Govindraj.Raja@...tec.com>, <Damien.Horsley@...tec.com>,
	<cernekee@...omium.org>, James Hogan <james.hogan@...tec.com>,
	Ezequiel Garcia <ezequiel.garcia@...tec.com>
Subject: [PATCH 1/9] clk: pistachio: Add a pll_lock() helper for clarity

This commit adds a pll_lock() helper making the code more readable.
Cosmetic change only, no functionality changes.

Signed-off-by: Andrew Bresticker <abrestic@...omium.org>
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@...tec.com>
---
 drivers/clk/pistachio/clk-pll.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/clk/pistachio/clk-pll.c b/drivers/clk/pistachio/clk-pll.c
index de53756..9ce1be7 100644
--- a/drivers/clk/pistachio/clk-pll.c
+++ b/drivers/clk/pistachio/clk-pll.c
@@ -67,6 +67,12 @@ static inline void pll_writel(struct pistachio_clk_pll *pll, u32 val, u32 reg)
 	writel(val, pll->base + reg);
 }
 
+static inline void pll_lock(struct pistachio_clk_pll *pll)
+{
+	while (!(pll_readl(pll, PLL_STATUS) & PLL_STATUS_LOCK))
+		cpu_relax();
+}
+
 static inline u32 do_div_round_closest(u64 dividend, u32 divisor)
 {
 	dividend += divisor / 2;
@@ -178,8 +184,7 @@ static int pll_gf40lp_frac_set_rate(struct clk_hw *hw, unsigned long rate,
 		(params->postdiv2 << PLL_FRAC_CTRL2_POSTDIV2_SHIFT);
 	pll_writel(pll, val, PLL_CTRL2);
 
-	while (!(pll_readl(pll, PLL_STATUS) & PLL_STATUS_LOCK))
-		cpu_relax();
+	pll_lock(pll);
 
 	if (!was_enabled)
 		pll_gf40lp_frac_disable(hw);
@@ -288,8 +293,7 @@ static int pll_gf40lp_laint_set_rate(struct clk_hw *hw, unsigned long rate,
 		(params->postdiv2 << PLL_INT_CTRL1_POSTDIV2_SHIFT);
 	pll_writel(pll, val, PLL_CTRL1);
 
-	while (!(pll_readl(pll, PLL_STATUS) & PLL_STATUS_LOCK))
-		cpu_relax();
+	pll_lock(pll);
 
 	if (!was_enabled)
 		pll_gf40lp_laint_disable(hw);
-- 
2.3.3

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