pwm: fsl-ftm: Clean up the code

This patch intends to prepare for converting to direct regmap API usage.

Signed-off-by: Xiubo Li <Li.Xiubo@freescale.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>

diff --git a/drivers/pwm/pwm-fsl-ftm.c b/drivers/pwm/pwm-fsl-ftm.c
index a18bc8f..96982da 100644 (file)
--- a/drivers/pwm/pwm-fsl-ftm.c
+++ b/drivers/pwm/pwm-fsl-ftm.c
@@ -21,11 +21,10 @@
 #include <linux/slab.h>
 
 #define FTM_SC         0x00
-#define FTM_SC_CLK_MASK        0x3
-#define FTM_SC_CLK_SHIFT       3
-#define FTM_SC_CLK(c)  (((c) + 1) << FTM_SC_CLK_SHIFT)
+#define FTM_SC_CLK_MASK_SHIFT  3
+#define FTM_SC_CLK_MASK        (3 << FTM_SC_CLK_MASK_SHIFT)
+#define FTM_SC_CLK(c)  (((c) + 1) << FTM_SC_CLK_MASK_SHIFT)
 #define FTM_SC_PS_MASK 0x7
-#define FTM_SC_PS_SHIFT        0
 
 #define FTM_CNT                0x04
 #define FTM_MOD                0x08
@@ -258,7 +257,7 @@ static int fsl_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
                }
 
                val = readl(fpc->base + FTM_SC);
-               val &= ~(FTM_SC_PS_MASK << FTM_SC_PS_SHIFT);
+               val &= ~FTM_SC_PS_MASK;
                val |= fpc->clk_ps;
                writel(val, fpc->base + FTM_SC);
                writel(period - 1, fpc->base + FTM_MOD);
@@ -305,7 +304,7 @@ static int fsl_counter_clock_enable(struct fsl_pwm_chip *fpc)
 
        /* select counter clock source */
        val = readl(fpc->base + FTM_SC);
-       val &= ~(FTM_SC_CLK_MASK << FTM_SC_CLK_SHIFT);
+       val &= ~FTM_SC_CLK_MASK;
        val |= FTM_SC_CLK(fpc->cnt_select);
        writel(val, fpc->base + FTM_SC);
 
@@ -357,7 +356,7 @@ static void fsl_counter_clock_disable(struct fsl_pwm_chip *fpc)
 
        /* no users left, disable PWM counter clock */
        val = readl(fpc->base + FTM_SC);
-       val &= ~(FTM_SC_CLK_MASK << FTM_SC_CLK_SHIFT);
+       val &= ~FTM_SC_CLK_MASK;
        writel(val, fpc->base + FTM_SC);
 
        clk_disable_unprepare(fpc->clk[FSL_PWM_CLK_CNTEN]);