diff options
| -rw-r--r-- | arch/arm/boot/dts/testcases/tests-phandle.dtsi | 37 | ||||
| -rw-r--r-- | arch/arm/boot/dts/testcases/tests.dtsi | 1 | ||||
| -rw-r--r-- | arch/arm/boot/dts/versatile-pb.dts | 2 | ||||
| -rw-r--r-- | drivers/of/Kconfig | 9 | ||||
| -rw-r--r-- | drivers/of/Makefile | 1 | ||||
| -rw-r--r-- | drivers/of/selftest.c | 139 |
6 files changed, 189 insertions, 0 deletions
diff --git a/arch/arm/boot/dts/testcases/tests-phandle.dtsi b/arch/arm/boot/dts/testcases/tests-phandle.dtsi new file mode 100644 index 000000000000..ec0c4e6212c9 --- /dev/null +++ b/arch/arm/boot/dts/testcases/tests-phandle.dtsi @@ -0,0 +1,37 @@ + +/ { + testcase-data { + phandle-tests { + provider0: provider0 { + #phandle-cells = <0>; + }; + + provider1: provider1 { + #phandle-cells = <1>; + }; + + provider2: provider2 { + #phandle-cells = <2>; + }; + + provider3: provider3 { + #phandle-cells = <3>; + }; + + consumer-a { + phandle-list = <&provider1 1>, + <&provider2 2 0>, + <0>, + <&provider3 4 4 3>, + <&provider2 5 100>, + <&provider0>, + <&provider1 7>; + phandle-list-names = "first", "second", "third"; + + phandle-list-bad-phandle = <12345678 0 0>; + phandle-list-bad-args = <&provider2 1 0>, + <&provider3 0>; + }; + }; + }; +}; diff --git a/arch/arm/boot/dts/testcases/tests.dtsi b/arch/arm/boot/dts/testcases/tests.dtsi new file mode 100644 index 000000000000..a7c5067622e8 --- /dev/null +++ b/arch/arm/boot/dts/testcases/tests.dtsi @@ -0,0 +1 @@ +/include/ "tests-phandle.dtsi" diff --git a/arch/arm/boot/dts/versatile-pb.dts b/arch/arm/boot/dts/versatile-pb.dts index 8a614e398004..166461073b78 100644 --- a/arch/arm/boot/dts/versatile-pb.dts +++ b/arch/arm/boot/dts/versatile-pb.dts @@ -46,3 +46,5 @@ }; }; }; + +/include/ "testcases/tests.dtsi" diff --git a/drivers/of/Kconfig b/drivers/of/Kconfig index cac63c9f49ae..268163dd71c7 100644 --- a/drivers/of/Kconfig +++ b/drivers/of/Kconfig @@ -15,6 +15,15 @@ config PROC_DEVICETREE an image of the device tree that the kernel copies from Open Firmware or other boot firmware. If unsure, say Y here. +config OF_SELFTEST + bool "Device Tree Runtime self tests" + help + This option builds in test cases for the device tree infrastructure + that are executed one at boot time, and the results dumped to the + console. + + If unsure, say N here, but this option is safe to enable. + config OF_FLATTREE bool select DTC diff --git a/drivers/of/Makefile b/drivers/of/Makefile index dccb1176be57..a73f5a51ff4c 100644 --- a/drivers/of/Makefile +++ b/drivers/of/Makefile @@ -8,6 +8,7 @@ obj-$(CONFIG_OF_GPIO) += gpio.o obj-$(CONFIG_OF_I2C) += of_i2c.o obj-$(CONFIG_OF_NET) += of_net.o obj-$(CONFIG_OF_SPI) += of_spi.o +obj-$(CONFIG_OF_SELFTEST) += selftest.o obj-$(CONFIG_OF_MDIO) += of_mdio.o obj-$(CONFIG_OF_PCI) += of_pci.o obj-$(CONFIG_OF_PCI_IRQ) += of_pci_irq.o diff --git a/drivers/of/selftest.c b/drivers/of/selftest.c new file mode 100644 index 000000000000..9d2b4803a9d6 --- /dev/null +++ b/drivers/of/selftest.c @@ -0,0 +1,139 @@ +/* + * Self tests for device tree subsystem + */ + +#define pr_fmt(fmt) "### %s(): " fmt, __func__ + +#include <linux/clk.h> +#include <linux/err.h> +#include <linux/errno.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/list.h> +#include <linux/mutex.h> +#include <linux/slab.h> +#include <linux/device.h> + +static bool selftest_passed = true; +#define selftest(result, fmt, ...) { \ + selftest_passed &= (result); \ + if (!(result)) \ + pr_err("FAIL %s:%i " fmt, __FILE__, __LINE__, ##__VA_ARGS__); \ +} + +static void __init of_selftest_parse_phandle_with_args(void) +{ + struct device_node *np; + struct of_phandle_args args; + int rc, i; + bool passed_all = true; + + pr_info("start\n"); + np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a"); + if (!np) { + pr_err("missing testcase data\n"); + return; + } + + for (i = 0; i < 7; i++) { + bool passed = true; + rc = of_parse_phandle_with_args(np, "phandle-list", + "#phandle-cells", i, &args); + + /* Test the values from tests-phandle.dtsi */ + switch (i) { + case 0: + passed &= !rc; + passed &= (args.args_count == 1); + passed &= (args.args[0] == (i + 1)); + break; + case 1: + passed &= !rc; + passed &= (args.args_count == 2); + passed &= (args.args[0] == (i + 1)); + passed &= (args.args[1] == 0); + break; + case 2: + passed &= (rc == -ENOENT); + break; + case 3: + passed &= !rc; + passed &= (args.args_count == 3); + passed &= (args.args[0] == (i + 1)); + passed &= (args.args[1] == 4); + passed &= (args.args[2] == 3); + break; + case 4: + passed &= !rc; + passed &= (args.args_count == 2); + passed &= (args.args[0] == (i + 1)); + passed &= (args.args[1] == 100); + break; + case 5: + passed &= !rc; + passed &= (args.args_count == 0); + break; + case 6: + passed &= !rc; + passed &= (args.args_count == 1); + passed &= (args.args[0] == (i + 1)); + break; + case 7: + passed &= (rc == -EINVAL); + break; + default: + passed = false; + } + + if (!passed) { + int j; + pr_err("index %i - data error on node %s rc=%i regs=[", + i, args.np->full_name, rc); + for (j = 0; j < args.args_count; j++) + printk(" %i", args.args[j]); + printk(" ]\n"); + + passed_all = false; + } + } + + /* Check for missing list property */ + rc = of_parse_phandle_with_args(np, "phandle-list-missing", + "#phandle-cells", 0, &args); + passed_all &= (rc == -EINVAL); + + /* Check for missing cells property */ + rc = of_parse_phandle_with_args(np, "phandle-list", + "#phandle-cells-missing", 0, &args); + passed_all &= (rc == -EINVAL); + + /* Check for bad phandle in list */ + rc = of_parse_phandle_with_args(np, "phandle-list-bad-phandle", + "#phandle-cells", 0, &args); + passed_all &= (rc == -EINVAL); + + /* Check for incorrectly formed argument list */ + rc = of_parse_phandle_with_args(np, "phandle-list-bad-args", + "#phandle-cells", 1, &args); + passed_all &= (rc == -EINVAL); + + pr_info("end - %s\n", passed_all ? "PASS" : "FAIL"); +} + +static int __init of_selftest(void) +{ + struct device_node *np; + + np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a"); + if (!np) { + pr_info("No testcase data in device tree; not running tests\n"); + return 0; + } + of_node_put(np); + + pr_info("start of selftest - you will see error messages\n"); + of_selftest_parse_phandle_with_args(); + pr_info("end of selftest - %s\n", selftest_passed ? "PASS" : "FAIL"); + return 0; +} +late_initcall(of_selftest); |
