i2c: designware: get fast plus and high speed *CNT configuration

I2C designware controller can run at fast mode plus and high speed. This
patch adds the capability to get the HCNT, LCNT configuration via
FPCN (fast plus) and HSCN (high speed) ACPI method.

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 63f6d4acee3931d250e6f6c39c4d5a5e3a974d8b..84866db2d04f65342e9d0138ae5246c94837dbf5 100644 (file)
--- a/drivers/i2c/busses/i2c-designware-core.h
+++ b/drivers/i2c/busses/i2c-designware-core.h
@@ -62,6 +62,10 @@
  * @ss_lcnt: standard speed LCNT value
  * @fs_hcnt: fast speed HCNT value
  * @fs_lcnt: fast speed LCNT value
+ * @fp_hcnt: fast plus HCNT value
+ * @fp_lcnt: fast plus LCNT value
+ * @hs_hcnt: high speed HCNT value
+ * @hs_lcnt: high speed LCNT value
  * @acquire_lock: function to acquire a hardware lock on the bus
  * @release_lock: function to release a hardware lock on the bus
  * @pm_runtime_disabled: true if pm runtime is disabled
@@ -105,6 +109,10 @@ struct dw_i2c_dev {
        u16                     ss_lcnt;
        u16                     fs_hcnt;
        u16                     fs_lcnt;
+       u16                     fp_hcnt;
+       u16                     fp_lcnt;
+       u16                     hs_hcnt;
+       u16                     hs_lcnt;
        int                     (*acquire_lock)(struct dw_i2c_dev *dev);
        void                    (*release_lock)(struct dw_i2c_dev *dev);
        bool                    pm_runtime_disabled;

diff --git a/drivers/i2c/busses/i2c-designware-platdrv.c b/drivers/i2c/busses/i2c-designware-platdrv.c
index 1608cf4d326395863d21aa0d5f7ee34ee11369d2..cbe4fb31cb4ba1576275e6c3b6869ee9e9d6377f 100644 (file)
--- a/drivers/i2c/busses/i2c-designware-platdrv.c
+++ b/drivers/i2c/busses/i2c-designware-platdrv.c
@@ -107,6 +107,8 @@ static int dw_i2c_acpi_configure(struct platform_device *pdev)
        dw_i2c_acpi_params(pdev, "SSCN", &dev->ss_hcnt, &dev->ss_lcnt, NULL);
        dw_i2c_acpi_params(pdev, "FMCN", &dev->fs_hcnt, &dev->fs_lcnt,
                           &dev->sda_hold_time);
+       dw_i2c_acpi_params(pdev, "FPCN", &dev->fp_hcnt, &dev->fp_lcnt, NULL);
+       dw_i2c_acpi_params(pdev, "HSCN", &dev->hs_hcnt, &dev->hs_lcnt, NULL);
 
        id = acpi_match_device(pdev->dev.driver->acpi_match_table, &pdev->dev);
        if (id && id->driver_data)