pitft: Add basic support for PiTFT

Add basic support for PiTFT display by using device-trees.

In order get it working below configurations must be active in
local.conf:

MACHINE_FEATURES += "pitft"
 - This will enable SPI bus and i2c device-trees, it will also setup
   framebuffer for console and x server on PiTFT.

[Support #70]

Signed-off-by: Petter Mabäcker <petter@technux.se>
Signed-off-by: Andrei Gherzan <andrei@gherzan.ro>

1 files changed, 13 insertions, 0 deletions

diff --git a/README b/README
index 3e879dd..129f5e2 100644
--- a/README
+++ b/README
@@ -28,6 +28,7 @@ Contents:
     3.K. Device tree support
     3.L. Enable SPI bus
     3.M. Enable I2C
+    3.N. Enable PiTFT support
 4. Extra apps
     4.A. omxplayer
 5. Board Configuration
@@ -213,6 +214,18 @@ ENABLE_SPI_BUS = "1"
 When using device tree kernels, set this variable to enable I2C
 ENABLE_I2C = "1"
 
+3.N. Enable PiTFT support
+=========================
+Basic support for using PiTFT screens can be enabled by adding
+below in local.conf:
+
+MACHINE_FEATURES += "pitft"
+  - This will enable SPI bus and i2c device-trees, it will also setup
+    framebuffer for console and x server on PiTFT.
+
+NOTE: To get this working the overlay for the PiTFT model must be build,
+      added and specified as well (dtoverlay=<driver> in config.txt)
+
 
 4. Extra apps
 =============