rpi-cmdline: Move cmdline.txt generation to a separate recipe

Instead of generating cmdline.txt in the kernel recipe, it is generated
in a standalone recipe and pulled in as a dependency of the bootfiles
recipe. This simplifies the process of using a linux-yocto,
linux-mainline or similiar kernel recipe instead of linux-raspberrypi.

In the rpi-cmdline recipe the command line is built from fragments which
can all be easily overridden. The variables `SERIAL` and `CMA` are
renamed to `CMDLINE_SERIAL` and `CMDLINE_CMA` for consistency. The
cmdline.txt file is created in the do_compile step to allow further
customisation via do_compile_append if needed.

Signed-off-by: Paul Barker <pbarker@konsulko.com>

2 files changed, 51 insertions, 2 deletions

diff --git a/recipes-bsp/bootfiles/bootfiles.bb b/recipes-bsp/bootfiles/bootfiles.bb
index 80e226d..d081806 100644
--- a/recipes-bsp/bootfiles/bootfiles.bb
+++ b/recipes-bsp/bootfiles/bootfiles.bb
@@ -9,7 +9,7 @@ include recipes-bsp/common/raspberrypi-firmware.inc
 
 INHIBIT_DEFAULT_DEPS = "1"
 
-DEPENDS = "rpi-config"
+DEPENDS = "rpi-config rpi-cmdline"
 
 COMPATIBLE_MACHINE = "^rpi$"
 
@@ -34,7 +34,7 @@ do_deploy() {
     touch ${DEPLOYDIR}/${PN}/${PN}-${PV}.stamp
 }
 
-do_deploy[depends] += "rpi-config:do_deploy"
+do_deploy[depends] += "rpi-config:do_deploy rpi-cmdline:do_deploy"
 
 addtask deploy before do_build after do_install
 do_deploy[dirs] += "${DEPLOYDIR}/${PN}"
diff --git a/recipes-bsp/bootfiles/rpi-cmdline.bb b/recipes-bsp/bootfiles/rpi-cmdline.bb
new file mode 100644
index 0000000..97db4e3
--- /dev/null
+++ b/recipes-bsp/bootfiles/rpi-cmdline.bb
@@ -0,0 +1,49 @@
+SUMMARY = "cmdline.txt file used to boot the kernel on a Raspberry Pi device"
+LICENSE = "MIT"
+LIC_FILES_CHKSUM = "file://${COMMON_LICENSE_DIR}/MIT;md5=0835ade698e0bcf8506ecda2f7b4f302"
+
+COMPATIBLE_MACHINE = "^rpi$"
+INHIBIT_DEFAULT_DEPS = "1"
+inherit deploy nopackages
+
+CMDLINE_DWC_OTG ?= "dwc_otg.lpm_enable=0"
+CMDLINE_ROOTFS ?= "root=/dev/mmcblk0p2 rootfstype=ext4 rootwait"
+
+CMDLINE_SERIAL ?= "${@oe.utils.conditional("ENABLE_UART", "1", "console=serial0,115200", "", d)}"
+
+CMDLINE_CMA ?= "${@oe.utils.conditional("RASPBERRYPI_CAMERA_V2", "1", "cma=64M", "", d)}"
+
+CMDLINE_PITFT ?= "${@bb.utils.contains("MACHINE_FEATURES", "pitft", "fbcon=map:10 fbcon=font:VGA8x8", "", d)}"
+
+# Add the kernel debugger over console kernel command line option if enabled
+CMDLINE_KGDB ?= '${@oe.utils.conditional("ENABLE_KGDB", "1", "kgdboc=serial0,115200", "", d)}'
+
+# Disable rpi logo on boot
+CMDLINE_LOGO ?= '${@oe.utils.conditional("DISABLE_RPI_BOOT_LOGO", "1", "logo.nologo", "", d)}'
+
+# You can define CMDLINE_DEBUG as "debug" in your local.conf or distro.conf
+# to enable kernel debugging.
+CMDLINE_DEBUG ?= ""
+
+CMDLINE = " \
+    ${CMDLINE_DWC_OTG} \
+    ${CMDLINE_SERIAL} \
+    ${CMDLINE_ROOTFS} \
+    ${CMDLINE_CMA} \
+    ${CMDLINE_KGDB} \
+    ${CMDLINE_LOGO} \
+    ${CMDLINE_PITFT} \
+    ${CMDLINE_DEBUG} \
+    "
+
+do_compile() {
+    echo "${CMDLINE}" > "${WORKDIR}/cmdline.txt"
+}
+
+do_deploy() {
+    install -d "${DEPLOYDIR}/${BOOTFILES_DIR_NAME}"
+    install -m 0644 "${WORKDIR}/cmdline.txt" "${DEPLOYDIR}/${BOOTFILES_DIR_NAME}"
+}
+
+addtask deploy before do_build after do_install
+do_deploy[dirs] += "${DEPLOYDIR}/${BOOTFILES_DIR_NAME}"