diff options
| author | Weifeng Voon <weifeng.voon@intel.com> | 2016-08-12 17:02:47 +0300 |
|---|---|---|
| committer | Wolfram Sang <wsa@the-dreams.de> | 2016-08-26 01:42:02 +0300 |
| commit | 19c0a5399fe46218c2b5a5c17a01cf60f91ff5ae (patch) | |
| tree | fc6d17a11ee86fc45a6c94c72b67a966fdc30748 /drivers/i2c/busses | |
| parent | f9484852567987158545523d6d6325d9cdf482b1 (diff) | |
| download | linux-19c0a5399fe46218c2b5a5c17a01cf60f91ff5ae.tar.xz | |
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>
Diffstat (limited to 'drivers/i2c/busses')
| -rw-r--r-- | drivers/i2c/busses/i2c-designware-core.h | 2 | ||||
| -rw-r--r-- | drivers/i2c/busses/i2c-designware-platdrv.c | 12 |
2 files changed, 8 insertions, 6 deletions
diff --git a/drivers/i2c/busses/i2c-designware-core.h b/drivers/i2c/busses/i2c-designware-core.h index 38493a7142ad..63f6d4acee39 100644 --- 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 d656657b805c..1608cf4d3263 100644 --- 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 |