From 085a6246f6310c305b10a2c75fcbe01058eb0e6b Mon Sep 17 00:00:00 2001 From: Jagadish Krishnamoorthy Date: Thu, 19 May 2016 19:32:13 -0700 Subject: [PATCH] UPSTREAM: 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. BUG=None BRANCH=None TEST=None Change-Id: I3d966eed62a059ecb6a0a88e9f4e6b4ba7a925e4 Original-Signed-off-by: Jagadish Krishnamoorthy Original-Reviewed-on: https://review.coreboot.org/14922 Original-Tested-by: build bot (Jenkins) Original-Reviewed-by: Aaron Durbin Signed-off-by: Aaron Durbin Reviewed-on: https://chromium-review.googlesource.com/347165 Commit-Ready: Furquan Shaikh Tested-by: Furquan Shaikh Reviewed-by: Furquan Shaikh --- src/mainboard/intel/amenia/acpi/mainboard.asl | 12 ++++++++++++ 1 file changed, 12 insertions(+) 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")