diff options
| author |   Lakshmi Sowjanya D <lakshmi.sowjanya.d@intel.com> | 2021-11-09 16:05:52 +0530 |
|---|---|---|
| committer |   Wolfram Sang <wsa@kernel.org> | 2021-11-29 17:55:32 +0100 |
| commit | 36af188f795bd1b0d794dd735623979dc6b698d3 (patch) | |
| tree | e2022b9188e6bfe866df90a6c9e7b6960bb9abed /drivers/i2c | |
| parent | i2c: designware-pci: Add support for Fast Mode Plus and High Speed Mode (diff) | |
| download | linux-dev-36af188f795bd1b0d794dd735623979dc6b698d3.tar.xz linux-dev-36af188f795bd1b0d794dd735623979dc6b698d3.zip | |
i2c: designware-pci: Set ideal timing parameters for Elkhart Lake PSE
Set optimal HCNT, LCNT and hold time values for all the speeds supported
in Intel Programmable Service Engine I2C controller in Intel Elkhart
Lake.
Signed-off-by: Lakshmi Sowjanya D <lakshmi.sowjanya.d@intel.com>
Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/busses/i2c-designware-pcidrv.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/i2c/busses/i2c-designware-pcidrv.c b/drivers/i2c/busses/i2c-designware-pcidrv.c index 174938fc7a7e..3418148f8bb5 100644 --- a/drivers/i2c/busses/i2c-designware-pcidrv.c +++ b/drivers/i2c/busses/i2c-designware-pcidrv.c @@ -84,6 +84,19 @@ static struct dw_scl_sda_cfg hsw_config = { .sda_hold = 0x9, }; +/* Elkhart Lake HCNT/LCNT/SDA hold time */ +static struct dw_scl_sda_cfg ehl_config = { + .ss_hcnt = 0x190, + .fs_hcnt = 0x4E, + .fp_hcnt = 0x1A, + .hs_hcnt = 0x1F, + .ss_lcnt = 0x1d6, + .fs_lcnt = 0x96, + .fp_lcnt = 0x32, + .hs_lcnt = 0x36, + .sda_hold = 0x1E, +}; + /* NAVI-AMD HCNT/LCNT/SDA hold time */ static struct dw_scl_sda_cfg navi_amd_config = { .ss_hcnt = 0x1ae, @@ -200,6 +213,7 @@ static struct dw_pci_controller dw_pci_controllers[] = { }, [elkhartlake] = { .bus_num = -1, + .scl_sda_cfg = &ehl_config, .get_clk_rate_khz = ehl_get_clk_rate_khz, }, [navi_amd] = { |