From a92ec1746f10e339220bf186c4f6cce531b8a7ee Mon Sep 17 00:00:00 2001 From: Weifeng Voon Date: Fri, 12 Aug 2016 17:02:48 +0300 Subject: [PATCH] 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 Signed-off-by: Jarkko Nikula Reviewed-by: Andy Shevchenko Signed-off-by: Wolfram Sang --- drivers/i2c/busses/i2c-designware-core.h | 8 ++++++++ drivers/i2c/busses/i2c-designware-platdrv.c | 2 ++ 2 files changed, 10 insertions(+) diff --git a/drivers/i2c/busses/i2c-designware-core.h b/drivers/i2c/busses/i2c-designware-core.h index 63f6d4acee39..84866db2d04f 100644 --- 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 1608cf4d3263..cbe4fb31cb4b 100644 --- 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) -- 2.34.1