commit 126ce5c28ba5aee6dacf4716947b7755b3bc2b7f
author Caveh Jalali <caveh@chromium.org> Fri Jun 15 20:33:32 2018 -0700
committer Furquan Shaikh <furquan@google.com> Thu Jun 21 04:38:46 2018 +0000
tree 988c4bbd8ad1fd6e6c3a367fb4c908d9467a27d0
parent e750198528f847a515e41c362451510e39ec9218

mb/google/poppy/variants/atlas: enable touchscreen

This adds the necessary config to enable touchscreen sensor in linux.

BUG=b:110286344,b:110286345
BRANCH=none
TEST=verified touch functionality using eval board

Change-Id: I21efafda3f2ae1dcea19e44f8d66f6dfaac1bb12
Signed-off-by: Caveh Jalali <caveh@chromium.org>
Reviewed-on: https://review.coreboot.org/27127
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>

src/mainboard/google/poppy/variants/atlas/devicetree.cb

diff --git a/src/mainboard/google/poppy/variants/atlas/devicetree.cb b/src/mainboard/google/poppy/variants/atlas/devicetree.cb
index 1dc981e..34bc4d4 100644
--- a/src/mainboard/google/poppy/variants/atlas/devicetree.cb
+++ b/src/mainboard/google/poppy/variants/atlas/devicetree.cb
@@ -258,7 +258,17 @@
 		device pci 14.0 on  end # USB xHCI
 		device pci 14.1 on  end # USB xDCI (OTG)
 		device pci 14.2 on  end # Thermal Subsystem
-		device pci 15.0 on  end # I2C #0 - Touchscreen
+		device pci 15.0 on
+			chip drivers/i2c/hid
+				register "generic.hid" = ""ACPI0C50""
+				register "generic.desc" = ""STM Touchscreen""
+				register "generic.irq" = "ACPI_IRQ_LEVEL_LOW(GPP_E7_IRQ)"
+				register "generic.speed" = "I2C_SPEED_FAST"
+				register "generic.probed" = "1"
+				register "hid_desc_reg_offset" = "0xab"
+				device i2c 0x49 on end
+			end
+		end # I2C #0 - Touchscreen
 		device pci 15.1 off end # I2C #1
 		device pci 15.2 on
 			chip drivers/i2c/hid