{"id":809830,"url":"http://patchwork.ozlabs.org/api/1.0/patches/809830/?format=json","project":{"id":18,"url":"http://patchwork.ozlabs.org/api/1.0/projects/18/?format=json","name":"U-Boot","link_name":"uboot","list_id":"u-boot.lists.denx.de","list_email":"u-boot@lists.denx.de","web_url":null,"scm_url":null,"webscm_url":null},"msgid":"<1504555943-12893-10-git-send-email-pantelis.antoniou@konsulko.com>","date":"2017-09-04T20:12:18","name":"[U-Boot,v3,09/14] doc: Document how to apply fdt overlays","commit_ref":null,"pull_url":null,"state":"accepted","archived":false,"hash":"ab8a29ef9109350b59a066232b54ed64c393b5db","submitter":{"id":64098,"url":"http://patchwork.ozlabs.org/api/1.0/people/64098/?format=json","name":"Pantelis Antoniou","email":"pantelis.antoniou@konsulko.com"},"delegate":{"id":3184,"url":"http://patchwork.ozlabs.org/api/1.0/users/3184/?format=json","username":"sjg","first_name":"Simon","last_name":"Glass","email":"sjg@chromium.org"},"mbox":"http://patchwork.ozlabs.org/project/uboot/patch/1504555943-12893-10-git-send-email-pantelis.antoniou@konsulko.com/mbox/","series":[{"id":1453,"url":"http://patchwork.ozlabs.org/api/1.0/series/1453/?format=json","date":"2017-09-04T20:12:09","name":"uboot overlays, FIT image & unittest","version":3,"mbox":"http://patchwork.ozlabs.org/series/1453/mbox/"}],"check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/809830/checks/","tags":{},"headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@bilbo.ozlabs.org","Authentication-Results":["ozlabs.org;\n\tspf=none (mailfrom) smtp.mailfrom=lists.denx.de\n\t(client-ip=81.169.180.215; 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charset=\"utf-8\"","Content-Transfer-Encoding":"base64","Errors-To":"u-boot-bounces@lists.denx.de","Sender":"\"U-Boot\" "},"content":"We have the capability to apply overlays on the command line but\nwe didn't have a document explaining how.\n\nSigned-off-by: Pantelis Antoniou \n---\n doc/README.fdt-overlays | 37 +++++++++++++++++++++++++++++++++++++\n 1 file changed, 37 insertions(+)\n create mode 100644 doc/README.fdt-overlays","diff":"diff --git a/doc/README.fdt-overlays b/doc/README.fdt-overlays\nnew file mode 100644\nindex 0000000..ee868ec\n--- /dev/null\n+++ b/doc/README.fdt-overlays\n@@ -0,0 +1,37 @@\n+U-Boot FDT Overlay usage (without FIT images)\n+=============================================\n+\n+FDT overlays are now available for use even without FIT images.\n+It is not as automagic as with FIT images though and require a few\n+manual steps.\n+\n+1. Figure out where to place both the base device tree blob and the\n+overlay. Make sure you have enough space to grow the base tree without\n+overlapping anything.\n+\n+=> setenv fdtaddr 0x87f00000\n+=> setenv fdtovaddr 0x87fc0000\n+\n+2. Load the base blob and overlay blobs\n+\n+=> load ${devtype} ${bootpart} ${fdtaddr} ${bootdir}/base.dtb\n+=> load ${devtype} ${bootpart} ${fdtovaddr} ${bootdir}/overlay.dtb\n+\n+3. Set it as the working fdt tree.\n+\n+=> fdtaddr $fdtaddr\n+\n+4. Grow it enough so it can 'fit' all the applied overlays\n+\n+=> fdt resize 8192\n+\n+5. You are now ready to apply the overlay.\n+\n+=> fdt apply $fdtovaddr\n+\n+Please note that in case of an error, both the base and overlays are going\n+to be invalidated, so keep copies to avoid reloading.\n+\n+Pantelis Antoniou\n+pantelis.antoniou@konsulko.com\n+11/7/2017\n","prefixes":["U-Boot","v3","09/14"]}