Signed-off-by: Hongmei Gou <[email protected]>
---
recipes-kernel/linux/cmem.inc | 83 +++++++++++++++++++++++++++++++++++++++++++
1 file changed, 83 insertions(+)
create mode 100644 recipes-kernel/linux/cmem.inc
diff --git a/recipes-kernel/linux/cmem.inc b/recipes-kernel/linux/cmem.inc
new file mode 100644
index 0000000..64d3264
--- /dev/null
+++ b/recipes-kernel/linux/cmem.inc
@@ -0,0 +1,83 @@
+# Add concept of machine variants to split DTBs into subsets
+#
+# Use these for temporary overrides
+CMEM_MACHINE = "${MACHINE}"
+CMEM_MACHINE_am57xx-evm = "am571x am572x am574x"
+CMEM_MACHINE_am57xx-hs-evm = "am571x am572x"
+CMEM_MACHINE_dra7xx-evm = "dra71x dra72x dra74x"
+CMEM_MACHINE_dra7xx-hs-evm = "dra71x dra72x dra74x"
+
+# Set cmem.dtsi per machine or machine variant
+CMEM_DTSI = "cmem.dtsi"
+CMEM_DTSI_am571x = "cmem-am571x.dtsi"
+CMEM_DTSI_dra71x = "cmem-dra71x.dtsi"
+CMEM_DTSI_dra72x = "cmem-dra72x.dtsi"
+
+# Split device trees between variants
+CMEM_DEVICETREE = "${KERNEL_DEVICETREE}"
+CMEM_DEVICETREE_am571x = "am571x-idk.dtb am571x-idk-lcd-osd101t2045.dtb
am571x-idk-lcd-osd101t2587.dtb"
+CMEM_DEVICETREE_am572x = "am57xx-beagle-x15.dtb am57xx-beagle-x15-revb1.dtb \
+ am57xx-evm.dtb am57xx-evm-cam-mt9t111.dtb
am57xx-evm-cam-ov10635.dtb \
+ am57xx-evm-reva3.dtb
am57xx-evm-reva3-cam-mt9t111.dtb am57xx-evm-reva3-cam-ov10635.dtb \
+ am572x-idk.dtb am572x-idk-lcd-osd101t2045.dtb
am572x-idk-lcd-osd101t2587.dtb"
+CMEM_DEVICETREE_am574x = "am574x-idk.dtb am574x-idk-lcd-osd101t2587.dtb"
+CMEM_DEVICETREE_dra71x = "dra71-evm.dtb dra71-evm-lcd-auo-g101evn01.0.dtb"
+CMEM_DEVICETREE_dra72x = "dra72-evm.dtb dra72-evm-lcd-lg.dtb
dra72-evm-lcd-osd101t2045.dtb dra72-evm-lcd-osd101t2587.dtb \
+ dra72-evm-revc.dtb
dra72-evm-revc-lcd-osd101t2045.dtb dra72-evm-revc-lcd-osd101t2587.dtb"
+CMEM_DEVICETREE_dra74x = "dra7-evm.dtb dra7-evm-lcd-lg.dtb
dra7-evm-lcd-osd101t2045.dtb dra7-evm-lcd-osd101t2587.dtb"
+
+# Flag to enable CMEM injection
+RESERVE_CMEM ?= "0"
+
+# Add correct cmem.dtsi to SRC_URI for each variant for a given machine
+python do_unpack() {
+ old_overrides = d.getVar('OVERRIDES', False)
+
+ # Initialize with empty string to simplify logic to append to SRC_URI
+ cmem_dtsi = set([''])
+
+ for cmem_machine in (d.getVar('CMEM_MACHINE', True) or '').split():
+ # Create copy of data for additional override
+ localdata = bb.data.createCopy(d)
+ localdata.setVar('OVERRIDES', '%s:%s' % (cmem_machine, old_overrides))
+ bb.data.update_data(localdata)
+
+ cmem_dtsi.add(localdata.getVar('CMEM_DTSI', True))
+
+ d.appendVar('SRC_URI', ' file://'.join(cmem_dtsi))
+ bb.build.exec_func('base_do_unpack', d)
+}
+
+python do_setup_cmem() {
+ import shutil
+
+ old_overrides = d.getVar('OVERRIDES', False)
+
+ if d.getVar('RESERVE_CMEM', True) is '1':
+ for cmem_machine in (d.getVar('CMEM_MACHINE', True) or '').split():
+ # Create copy of data for additional override
+ localdata = bb.data.createCopy(d)
+ localdata.setVar('OVERRIDES', '%s:%s' % (cmem_machine,
old_overrides))
+ bb.data.update_data(localdata)
+
+ # Get source directory and dtsi filename
+ src_dir = localdata.getVar('WORKDIR', True)
+ src_dtsi = localdata.getVar('CMEM_DTSI', True)
+
+ # Get destination directory and destination dtsi filename which
adds
+ # the MACHINE prefix.
+ dst_dir = os.path.join(localdata.getVar('S', True),
'arch/arm/boot/dts')
+ dst_dtsi = localdata.expand('${MACHINE}-${CMEM_DTSI}')
+
+ # Copy cmem.dtsi into source tree
+ shutil.copy(os.path.join(src_dir,src_dtsi),
os.path.join(dst_dir,dst_dtsi))
+
+ # Inject dtsi into each dts in list
+ for dtb in (localdata.getVar('CMEM_DEVICETREE', True) or
'').split():
+ dts = dtb[:-4] + '.dts'
+
+ with open(os.path.join(dst_dir,dts), 'a') as dts_file:
+ dts_file.write('\n#include "%s"\n' % dst_dtsi)
+}
+
+do_patch[postfuncs] += "do_setup_cmem"
--
1.9.1
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