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Message-ID: <1426045043-128610-4-git-send-email-long.wanglong@huawei.com> Date: Wed, 11 Mar 2015 03:37:21 +0000 From: Wang Long <long.wanglong@...wei.com> To: <gaurav.minocha.os@...il.com>, <robherring2@...il.com>, <robh+dt@...nel.org>, <pantelis.antoniou@...sulko.com>, <grant.likely@...aro.org> CC: <pawel.moll@....com>, <mark.rutland@....com>, <galak@...eaurora.org>, <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>, <peifeiyue@...wei.com>, <long.wanglong@...wei.com>, <ijc+devicetree@...lion.org.uk> Subject: [PATCH 3/5] Documentation: update the of_selftest.txt Since the directory "drivers/of/testcase-data" is renamed to "drivers/of/unittest-data". so we should update the path in the of_selftest.txt. When the kernel is built with OF_UNITTEST enabled, the output dtb is testcases.dtb instead of testcase.dtb, also update it (s/testcase/testcases/). Signed-off-by: Wang Long <long.wanglong@...wei.com> --- Documentation/devicetree/of_selftest.txt | 35 ++++++++++++++++---------------- 1 file changed, 18 insertions(+), 17 deletions(-) diff --git a/Documentation/devicetree/of_selftest.txt b/Documentation/devicetree/of_selftest.txt index 57a808b..d79a6bc 100644 --- a/Documentation/devicetree/of_selftest.txt +++ b/Documentation/devicetree/of_selftest.txt @@ -1,11 +1,11 @@ -Open Firmware Device Tree Selftest +Open Firmware Device Tree Unittest ---------------------------------- Author: Gaurav Minocha <gaurav.minocha.os@...il.com> 1. Introduction -This document explains how the test data required for executing OF selftest +This document explains how the test data required for executing OF unittest is attached to the live tree dynamically, independent of the machine's architecture. @@ -22,31 +22,32 @@ most of the device drivers in various use cases. 2. Test-data -The Device Tree Source file (drivers/of/testcase-data/testcases.dts) contains +The Device Tree Source file (drivers/of/unittest-data/testcases.dts) contains the test data required for executing the unit tests automated in -drivers/of/selftests.c. Currently, following Device Tree Source Include files -(.dtsi) are included in testcase.dts: +drivers/of/unittest.c. Currently, following Device Tree Source Include files +(.dtsi) are included in testcases.dts: -drivers/of/testcase-data/tests-interrupts.dtsi -drivers/of/testcase-data/tests-platform.dtsi -drivers/of/testcase-data/tests-phandle.dtsi -drivers/of/testcase-data/tests-match.dtsi +drivers/of/unittest-data/tests-interrupts.dtsi +drivers/of/unittest-data/tests-platform.dtsi +drivers/of/unittest-data/tests-phandle.dtsi +drivers/of/unittest-data/tests-match.dtsi +drivers/of/unittest-data/tests-overlay.dtsi When the kernel is build with OF_SELFTEST enabled, then the following make rule $(obj)/%.dtb: $(src)/%.dts FORCE $(call if_changed_dep, dtc) -is used to compile the DT source file (testcase.dts) into a binary blob -(testcase.dtb), also referred as flattened DT. +is used to compile the DT source file (testcases.dts) into a binary blob +(testcases.dtb), also referred as flattened DT. After that, using the following rule the binary blob above is wrapped as an -assembly file (testcase.dtb.S). +assembly file (testcases.dtb.S). $(obj)/%.dtb.S: $(obj)/%.dtb $(call cmd, dt_S_dtb) -The assembly file is compiled into an object file (testcase.dtb.o), and is +The assembly file is compiled into an object file (testcases.dtb.o), and is linked into the kernel image. @@ -98,8 +99,8 @@ child11 -> sibling12 -> sibling13 -> sibling14 -> null Figure 1: Generic structure of un-flattened device tree -Before executing OF selftest, it is required to attach the test data to -machine's device tree (if present). So, when selftest_data_add() is called, +Before executing OF unittest, it is required to attach the test data to +machine's device tree (if present). So, when unittest_data_add() is called, at first it reads the flattened device tree data linked into the kernel image via the following kernel symbols: @@ -186,10 +187,10 @@ update_node_properties(). 2.2. Removing the test data -Once the test case execution is complete, selftest_data_remove is called in +Once the test case execution is complete, unittest_data_remove is called in order to remove the device nodes attached initially (first the leaf nodes are detached and then moving up the parent nodes are removed, and eventually the -whole tree). selftest_data_remove() calls detach_node_and_children() that uses +whole tree). unittest_data_remove() calls detach_node_and_children() that uses of_detach_node() to detach the nodes from the live device tree. To detach a node, of_detach_node() either updates the child pointer of given -- 1.8.3.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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