Module: meta-ti
Branch: master
Commit: 0623707d8084b2856b74a1b40aa2dee361f6b933
URL:
http://arago-project.org/git/meta-ti.git?a=commit;h=0623707d8084b2856b74a1b40aa2dee361f6b933
Author: Jacob Stiffler <j-stiff...@ti.com>
Date: Wed Sep 14 00:21:17 2016 +0000
linux: add new method for cmem injection
* Add new method to perform CMEM DT injection as it is required to
customize at a finer level than machine.
* Now CMEM injection can be performed per DT.
Signed-off-by: Jacob Stiffler <j-stiff...@ti.com>
Signed-off-by: Denys Dmytriyenko <de...@ti.com>
---
recipes-kernel/linux/cmem.inc | 78 +++++++++++++++++---
recipes-kernel/linux/files/dra7xx/cmem-am571x.dtsi | 29 +++++++
2 files changed, 95 insertions(+), 12 deletions(-)
diff --git a/recipes-kernel/linux/cmem.inc b/recipes-kernel/linux/cmem.inc
index fc0bf48..b60909c 100644
--- a/recipes-kernel/linux/cmem.inc
+++ b/recipes-kernel/linux/cmem.inc
@@ -1,18 +1,72 @@
-SRC_URI += "file://cmem.dtsi"
+# Add concept of machine variants to split DTBs into subsets
+#
+# Use these for temporary overrides
+CMEM_MACHINE = "${MACHINE}"
+CMEM_MACHINE_am57xx-evm = "am571x am572x"
+CMEM_MACHINE_am57xx-hs-evm = "am571x am572x"
+# Set cmem.dtsi per machine or machine variant
+CMEM_DTSI = "cmem.dtsi"
+CMEM_DTSI_am571x = "cmem-am571x.dtsi"
+
+# Split device trees between variants
+CMEM_DEVICETREE = "${KERNEL_DEVICETREE}"
+CMEM_DEVICETREE_am571x = "am571x-idk.dtb am571x-idk-lcd-osd.dtb
am571x-idk-lcd-osd101t2587.dtb"
+CMEM_DEVICETREE_am572x = "am57xx-beagle-x15.dtb am57xx-beagle-x15-revb1.dtb
am57xx-evm.dtb am57xx-evm-reva3.dtb am572x-idk.dtb \
+ am572x-idk-lcd-osd.dtb
am572x-idk-lcd-osd101t2587.dtb"
+
+
+# Flag to enable CMEM injection
RESERVE_CMEM ?= "0"
-do_setup_cmem() {
- if [ "${RESERVE_CMEM}" == "1" ]
- then
- cp ${WORKDIR}/cmem.dtsi ${S}/arch/arm/boot/dts/${MACHINE}-cmem.dtsi
-
- for dtb in ${KERNEL_DEVICETREE}
- do
- dts=`echo $dtb | sed -e 's|dtb$|dts|'`
- echo "#include \"${MACHINE}-cmem.dtsi\"" >>
${S}/arch/arm/boot/dts/$dts
- done
- fi
+# Add correct cmem.dtsi to SRC_URI for each variant for a given machine
+python() {
+ 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))
+}
+
+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"
diff --git a/recipes-kernel/linux/files/dra7xx/cmem-am571x.dtsi
b/recipes-kernel/linux/files/dra7xx/cmem-am571x.dtsi
new file mode 100644
index 0000000..ebd6129
--- /dev/null
+++ b/recipes-kernel/linux/files/dra7xx/cmem-am571x.dtsi
@@ -0,0 +1,29 @@
+/ {
+ reserved-memory {
+ #address-cells = <2>;
+ #size-cells = <2>;
+ ranges;
+
+ cmem_block_mem_0: cmem_block_mem@a0000000 {
+ reg = <0x0 0xa0000000 0x0 0x0c000000>;
+ no-map;
+ status = "okay";
+ };
+ };
+
+ cmem {
+ compatible = "ti,cmem";
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ #pool-size-cells = <2>;
+
+ status = "okay";
+
+ cmem_block_0: cmem_block@0 {
+ reg = <0>;
+ memory-region = <&cmem_block_mem_0>;
+ cmem-buf-pools = <1 0x0 0x0c000000>;
+ };
+ };
+};
--
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