i2c: designware: Call i2c_dw_clk_rate() only once in i2c_dw_init_master()

This is rather readability update than micro-optimization, or if not
optimization at all. We take the input clock rate to a variable and pass
that to SCL timing parameter calculation functions.

Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

diff --git a/drivers/i2c/busses/i2c-designware-master.c b/drivers/i2c/busses/i2c-designware-master.c
index 3a7c184..cb3ac1f 100644 (file)
--- a/drivers/i2c/busses/i2c-designware-master.c
+++ b/drivers/i2c/busses/i2c-designware-master.c
@@ -55,6 +55,7 @@ static void i2c_dw_configure_fifo_master(struct dw_i2c_dev *dev)
  */
 static int i2c_dw_init_master(struct dw_i2c_dev *dev)
 {
+       u32 ic_clk = i2c_dw_clk_rate(dev);
        u32 hcnt, lcnt;
        u32 reg, comp_param1;
        u32 sda_falling_time, scl_falling_time;
@@ -79,12 +80,12 @@ static int i2c_dw_init_master(struct dw_i2c_dev *dev)
                hcnt = dev->ss_hcnt;
                lcnt = dev->ss_lcnt;
        } else {
-               hcnt = i2c_dw_scl_hcnt(i2c_dw_clk_rate(dev),
+               hcnt = i2c_dw_scl_hcnt(ic_clk,
                                        4000,   /* tHD;STA = tHIGH = 4.0 us */
                                        sda_falling_time,
                                        0,      /* 0: DW default, 1: Ideal */
                                        0);     /* No offset */
-               lcnt = i2c_dw_scl_lcnt(i2c_dw_clk_rate(dev),
+               lcnt = i2c_dw_scl_lcnt(ic_clk,
                                        4700,   /* tLOW = 4.7 us */
                                        scl_falling_time,
                                        0);     /* No offset */
@@ -101,12 +102,12 @@ static int i2c_dw_init_master(struct dw_i2c_dev *dev)
                hcnt = dev->fs_hcnt;
                lcnt = dev->fs_lcnt;
        } else {
-               hcnt = i2c_dw_scl_hcnt(i2c_dw_clk_rate(dev),
+               hcnt = i2c_dw_scl_hcnt(ic_clk,
                                        600,    /* tHD;STA = tHIGH = 0.6 us */
                                        sda_falling_time,
                                        0,      /* 0: DW default, 1: Ideal */
                                        0);     /* No offset */
-               lcnt = i2c_dw_scl_lcnt(i2c_dw_clk_rate(dev),
+               lcnt = i2c_dw_scl_lcnt(ic_clk,
                                        1300,   /* tLOW = 1.3 us */
                                        scl_falling_time,
                                        0);     /* No offset */