linux:rt: Update RT patch

Signed-off-by: Valentin Raevsky <valentin@compulab.co.il>
Signed-off-by: Kirill Kapranov <kirill.kapranov@compulab.co.il>

recipes-kernel/linux-rt/README.md

@@ -0,0 +1,6 @@
+# How to
+
+* Update the `conf/local.conf`
+```
+DISTRO_FEATURES_append = " linux-rt "
+```

recipes-kernel/linux-rt/compulab/imx8mm.inc

@@ -0,0 +1,3 @@
+SRC_URI_append = " \
+	file://0100-rt-kernel-Add-the-real-time-patch.patch \
+"

recipes-kernel/linux-rt/linux-compulab-rt.inc

@@ -0,0 +1,12 @@
+FILESEXTRAPATHS_prepend := "${THISDIR}/compulab/imx8mm:"
+
+require compulab/imx8mm.inc
+
+do_configure_prepend() {
+    # Merge common defconfig with specific fraggment to get specific defconfig
+    local CONFDIR=arch/arm64/configs
+    cd ${S}
+    scripts/kconfig/merge_config.sh  -O ${CONFDIR}/ -m  ${CONFDIR}/${MACHINE}_defconfig ${CONFDIR}/rt.config
+    mv ${CONFDIR}/.config ${CONFDIR}/${MACHINE}_defconfig
+    cd -
+}

recipes-kernel/linux-rt/linux-compulab.inc

@@ -0,0 +1 @@
+# Just an empty file

recipes-kernel/linux-rt/linux-compulab_5.10.%.bbappend

@@ -0,0 +1,3 @@
+RT = "${@bb.utils.contains('DISTRO_FEATURES', 'linux-rt', '-rt', '', d)}"
+
+require linux-compulab${RT}.inc

recipes-kernel/linux-rt/linux-imx_%.bbappend

@@ -1,22 +0,0 @@
-include rt.inc
-
-python (){
-    import re
-
-    if bb.utils.contains('IMAGE_FEATURES', 'realtime-kernel', False, True, d):
-        return
-
-    PV = d.getVar("PV")
-    major_dot_minor_dot_fix = re.sub(r'\+.*$', '',  PV)
-
-    rt_patch_uri = d.getVar('RT_PATCH_URI')
-    if re.search(r'patch-' + major_dot_minor_dot_fix + '-rt', rt_patch_uri):
-        d.appendVar("SRC_URI"," " + rt_patch_uri + " ")
-    else:
-        patch_name = re.search(r'^.*(patch-[\.0-9]*-rt[\.0-9]*\.patch).*$',rt_patch_uri)
-        if patch_name:
-            bb.error("RT patch: " + patch_name.group(1))
-            bb.error("Kernel revision to build: " + major_dot_minor_dot_fix)
-            bb.error("Please find an appropriate patch on https://mirrors.edge.kernel.org/pub/linux/kernel/projects/rt")
-        #bb.fatal("RT patch revision doesn't match the kernel revision we are about to build")
-}

recipes-kernel/linux-rt/rt.inc

@@ -1,2 +0,0 @@
-RT_PATCH_URI = "https://mirrors.edge.kernel.org/pub/linux/kernel/projects/rt/5.10/older/patch-5.10.35-rt39.patch.xz;sha256sum=3e1d3531173d5bb276935eaec016ef3c3c0f8f4fcc1fc418d192cc10824ff80d"
-

templates/local.conf/rt_kernel.append

@@ -1,3 +1,3 @@
-#;DISABLE prompt Realtime kernel support [no]
+#;prompt Realtime kernel support [no]
 
-IMAGE_FEATURES += " realtime-kernel "
+DISTRO_FEATURES:append = " linux-rt "