From c123ccfa127b58a20ad3efa800c0e73f307f0ac5 Mon Sep 17 00:00:00 2001 From: Jagadish Krishnamoorthy Date: Thu, 19 May 2016 19:32:13 -0700 Subject: intel/amenia: Configure Trackpad IC_SDA_HOLD time Elan trackpad needs greater sda hold time. Configure IC_SDA_HOLD register to increase the i2c sda hold time by 0.3us. Change-Id: I3d966eed62a059ecb6a0a88e9f4e6b4ba7a925e4 Signed-off-by: Jagadish Krishnamoorthy Reviewed-on: https://review.coreboot.org/14922 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin --- src/mainboard/intel/amenia/acpi/mainboard.asl | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'src') diff --git a/src/mainboard/intel/amenia/acpi/mainboard.asl b/src/mainboard/intel/amenia/acpi/mainboard.asl index 35043b0e73..09ef9b4e34 100644 --- a/src/mainboard/intel/amenia/acpi/mainboard.asl +++ b/src/mainboard/intel/amenia/acpi/mainboard.asl @@ -18,6 +18,18 @@ Scope (\_SB.PCI0.I2C4) { + /* Standard Mode: HCNT, LCNT, SDA Hold Register */ + /* SDA Hold register value of 40 indicates + * sda hold time of 0.3us for ic_clk of 133MHz + */ + Name (SSCN, Package () { 0, 0, 40 }) + + /* Fast Mode: HCNT, LCNT, SDA Hold Register */ + /* SDA Hold register value of 40 indicates + * sda hold time of 0.3us for ic_clk of 133MHz + */ + Name (FMCN, Package () { 0, 0, 40 }) + Device (ETPA) { Name (_HID, "ELAN0000") -- cgit v1.2.3