i2c: designware: Move clk_freq into struct dw_i2c_dev

I2c designware controller operate speed is configured in the register
IC_CON. Previously the operate speed is determined by a local variable
clk_freq. This patch will move the local variable clk_freq into struct
dw_i2c_dev. This change will ease the set and get of the clk_freq.

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

diff --git a/drivers/i2c/busses/i2c-designware-core.h b/drivers/i2c/busses/i2c-designware-core.h
index 38493a7..63f6d4a 100644 (file)
--- a/drivers/i2c/busses/i2c-designware-core.h
+++ b/drivers/i2c/busses/i2c-designware-core.h
@@ -57,6 +57,7 @@
  * @tx_fifo_depth: depth of the hardware tx fifo
  * @rx_fifo_depth: depth of the hardware rx fifo
  * @rx_outstanding: current master-rx elements in tx fifo
+ * @clk_freq: bus clock frequency
  * @ss_hcnt: standard speed HCNT value
  * @ss_lcnt: standard speed LCNT value
  * @fs_hcnt: fast speed HCNT value
@@ -96,6 +97,7 @@ struct dw_i2c_dev {
        unsigned int            tx_fifo_depth;
        unsigned int            rx_fifo_depth;
        int                     rx_outstanding;
+       u32                     clk_freq;
        u32                     sda_hold_time;
        u32                     sda_falling_time;
        u32                     scl_falling_time;

diff --git a/drivers/i2c/busses/i2c-designware-platdrv.c b/drivers/i2c/busses/i2c-designware-platdrv.c
index d656657..1608cf4 100644 (file)
--- a/drivers/i2c/busses/i2c-designware-platdrv.c
+++ b/drivers/i2c/busses/i2c-designware-platdrv.c
@@ -155,7 +155,7 @@ static int dw_i2c_plat_probe(struct platform_device *pdev)
        struct i2c_adapter *adap;
        struct resource *mem;
        int irq, r;
-       u32 clk_freq, ht = 0;
+       u32 ht = 0;
 
        irq = platform_get_irq(pdev, 0);
        if (irq < 0)
@@ -175,10 +175,10 @@ static int dw_i2c_plat_probe(struct platform_device *pdev)
        platform_set_drvdata(pdev, dev);
 
        /* fast mode by default because of legacy reasons */
-       clk_freq = 400000;
+       dev->clk_freq = 400000;
 
        if (pdata) {
-               clk_freq = pdata->i2c_scl_freq;
+               dev->clk_freq = pdata->i2c_scl_freq;
        } else {
                device_property_read_u32(&pdev->dev, "i2c-sda-hold-time-ns",
                                         &ht);
@@ -187,7 +187,7 @@ static int dw_i2c_plat_probe(struct platform_device *pdev)
                device_property_read_u32(&pdev->dev, "i2c-scl-falling-time-ns",
                                         &dev->scl_falling_time);
                device_property_read_u32(&pdev->dev, "clock-frequency",
-                                        &clk_freq);
+                                        &dev->clk_freq);
        }
 
        if (has_acpi_companion(&pdev->dev))
@@ -196,7 +196,7 @@ static int dw_i2c_plat_probe(struct platform_device *pdev)
        /*
         * Only standard mode at 100kHz and fast mode at 400kHz are supported.
         */
-       if (clk_freq != 100000 && clk_freq != 400000) {
+       if (dev->clk_freq != 100000 && dev->clk_freq != 400000) {
                dev_err(&pdev->dev, "Only 100kHz and 400kHz supported");
                return -EINVAL;
        }
@@ -212,7 +212,7 @@ static int dw_i2c_plat_probe(struct platform_device *pdev)
                I2C_FUNC_SMBUS_BYTE_DATA |
                I2C_FUNC_SMBUS_WORD_DATA |
                I2C_FUNC_SMBUS_I2C_BLOCK;
-       if (clk_freq == 100000)
+       if (dev->clk_freq == 100000)
                dev->master_cfg =  DW_IC_CON_MASTER | DW_IC_CON_SLAVE_DISABLE |
                        DW_IC_CON_RESTART_EN | DW_IC_CON_SPEED_STD;
        else