pitft: Add support for pitft28r

The support for PiTFT 28 inch resistive touchscreen is optional
and can be enabled by adding below in local.conf:

MACHINE_FEATURES += "pitft pitft28r"

While at it also fix a minor typo in README.

Signed-off-by: Petter Mabäcker <petter@technux.se>

README

@@ -204,7 +204,7 @@ kernels.
 NOTE: KERNEL_DEVICETREE is default enabled for kernel >= 3.18 and always disabled for
       older kernel versions.
 
-3.L. Eenable SPI bus
+3.L. Enable SPI bus
 ====================
 When using device tree kernels, set this variable to enable the SPI bus
 ENABLE_SPI_BUS = "1"
@@ -232,6 +232,7 @@ the modelname should be added as a MACHINE_FEATURES in local.conf like below:
 
 List of currently supported models:
     - pitft22
+    - pitft28r
 
 
 4. Extra apps

conf/machine/include/rpi-base.inc

@@ -33,6 +33,7 @@ KERNEL_DEVICETREE ?= " \
     overlays/iqaudio-dacplus-overlay.dtb \
     overlays/lirc-rpi-overlay.dtb \
     overlays/pitft22-overlay.dtb \
+    overlays/pitft28-resistive-overlay.dtb \
     overlays/pps-gpio-overlay.dtb \
     overlays/w1-gpio-overlay.dtb \
     overlays/w1-gpio-pullup-overlay.dtb \

recipes-bsp/bootfiles/rpi-config_git.bb

@@ -17,6 +17,7 @@ PR = "r4"
 
 PITFT="${@bb.utils.contains("MACHINE_FEATURES", "pitft", "1", "0", d)}"
 PITFT22="${@bb.utils.contains("MACHINE_FEATURES", "pitft22", "1", "0", d)}"
+PITFT28r="${@bb.utils.contains("MACHINE_FEATURES", "pitft28r", "1", "0", d)}"
 
 inherit deploy
 
@@ -90,6 +91,11 @@ do_deploy() {
         echo "# Enable PITFT22 display" >>${DEPLOYDIR}/bcm2835-bootfiles/config.txt
         echo "dtoverlay=pitft22,rotate=270,speed=32000000,txbuflen=32768" >>${DEPLOYDIR}/bcm2835-bootfiles/config.txt
     fi
+
+    if [ "${PITFT28r}" = "1" ]; then
+        echo "# Enable PITFT28r display" >>${DEPLOYDIR}/bcm2835-bootfiles/config.txt
+        echo "dtoverlay=pitft28-resistive,rotate=90,speed=32000000,txbuflen=32768" >>${DEPLOYDIR}/bcm2835-bootfiles/config.txt
+    fi
 }
 
 addtask deploy before do_package after do_install

recipes-graphics/xorg-xserver/xserver-xf86-config/rpi/xorg.conf.d/99-calibration.conf

@@ -0,0 +1,6 @@
+Section "InputClass"
+        Identifier      "calibration"
+        MatchProduct    "stmpe-ts"
+        Option  "Calibration"   "3800 200 200 3800"
+        Option  "SwapAxes"      "1"
+EndSection

recipes-graphics/xorg-xserver/xserver-xf86-config_0.1.bbappend

@@ -1,7 +1,8 @@
 FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:"
 
 SRC_URI_append_rpi = " file://xorg.conf.d/10-evdev.conf \
-                       file://xorg.conf.d/99-pitft.conf \
+                       file://xorg.conf.d/98-pitft.conf \
+                       file://xorg.conf.d/99-calibration.conf \
                      "
 
 do_install_append_rpi () {
@@ -10,7 +11,8 @@ do_install_append_rpi () {
 
 	PITFT="${@bb.utils.contains("MACHINE_FEATURES", "pitft", "1", "0", d)}"
 	if [ "${PITFT}" = "1" ]; then
-		install -m 0644 ${WORKDIR}/xorg.conf.d/99-pitft.conf ${D}/${sysconfdir}/X11/xorg.conf.d/
+		install -m 0644 ${WORKDIR}/xorg.conf.d/98-pitft.conf ${D}/${sysconfdir}/X11/xorg.conf.d/
+		install -m 0644 ${WORKDIR}/xorg.conf.d/99-calibration.conf ${D}/${sysconfdir}/X11/xorg.conf.d/
 	fi
 }
 

recipes-kernel/linux/linux-raspberrypi.inc

@@ -27,6 +27,8 @@ CMDLINE_append = ' ${@base_conditional("ENABLE_KGDB", "1", "kgdboc=ttyAMA0,11520
 
 UDEV_GE_141 ?= "1"
 
+KERNEL_MODULE_AUTOLOAD += "${@bb.utils.contains("MACHINE_FEATURES", "pitft28r", "stmpe-ts", "", d)}"
+
 # Set programmatically some variables during recipe parsing
 # See http://www.yoctoproject.org/docs/current/bitbake-user-manual/bitbake-user-manual.html#anonymous-python-functions
 python __anonymous () {