Commit 36af188f authored by Lakshmi Sowjanya D's avatar Lakshmi Sowjanya D Committed by Wolfram Sang
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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: default avatarLakshmi Sowjanya D <lakshmi.sowjanya.d@intel.com>
Acked-by: default avatarJarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: default avatarWolfram Sang <wsa@kernel.org>
parent e8578547

drivers/i2c/busses/i2c-designware-pcidrv.c

+14 −0
Original line number Diff line number Diff line
@@ -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] = {