From: Marek Behún Date: Mon, 12 Aug 2019 16:11:16 +0000 (+0200) Subject: bus: moxtet: Add sysfs and debugfs documentation X-Git-Tag: v5.4-rc1~186^2~30 X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=2091b417aab195a2c35abe780ad15ade1b0932ac;p=users%2Fjedix%2Flinux-maple.git bus: moxtet: Add sysfs and debugfs documentation Add sysfs ABI documentation for the attribute files module_id and module_name Add debugfs ABI documentation for reading input from the shift registers and reading last written output or write output to the shift registers. Link: https://lore.kernel.org/r/20190812161118.21476-4-marek.behun@nic.cz Signed-off-by: Marek Behún Reviewed-by: Linus Walleij Signed-off-by: Arnd Bergmann --- diff --git a/Documentation/ABI/testing/debugfs-moxtet b/Documentation/ABI/testing/debugfs-moxtet new file mode 100644 index 0000000000000..67b1717794d87 --- /dev/null +++ b/Documentation/ABI/testing/debugfs-moxtet @@ -0,0 +1,23 @@ +What: /sys/kernel/debug/moxtet/input +Date: March 2019 +KernelVersion: 5.3 +Contact: Marek Behún +Description: (R) Read input from the shift registers, in hexadecimal. + Returns N+1 bytes, where N is the number of Moxtet connected + modules. The first byte is from the CPU board itself. + Example: 101214 + 10: CPU board with SD card + 12: 2 = PCIe module, 1 = IRQ not active + 14: 4 = Peridot module, 1 = IRQ not active + +What: /sys/kernel/debug/moxtet/output +Date: March 2019 +KernelVersion: 5.3 +Contact: Marek Behún +Description: (RW) Read last written value to the shift registers, in + hexadecimal, or write values to the shift registers, also + in hexadecimal. + Example: 0102 + 01: 01 was last written, or is to be written, to the + first module's shift register + 02: the same for second module diff --git a/Documentation/ABI/testing/sysfs-bus-moxtet-devices b/Documentation/ABI/testing/sysfs-bus-moxtet-devices new file mode 100644 index 0000000000000..355958527fa35 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-bus-moxtet-devices @@ -0,0 +1,17 @@ +What: /sys/bus/moxtet/devices/moxtet-./module_description +Date: March 2019 +KernelVersion: 5.3 +Contact: Marek Behún +Description: (R) Moxtet module description. Format: string + +What: /sys/bus/moxtet/devices/moxtet-./module_id +Date: March 2019 +KernelVersion: 5.3 +Contact: Marek Behún +Description: (R) Moxtet module ID. Format: %x + +What: /sys/bus/moxtet/devices/moxtet-./module_name +Date: March 2019 +KernelVersion: 5.3 +Contact: Marek Behún +Description: (R) Moxtet module name. Format: string diff --git a/MAINTAINERS b/MAINTAINERS index e0b803ba14186..1869e83f514a4 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -1630,6 +1630,8 @@ ARM/CZ.NIC TURRIS MOX SUPPORT M: Marek Behun W: http://mox.turris.cz S: Maintained +F: Documentation/ABI/testing/debugfs-moxtet +F: Documentation/ABI/testing/sysfs-bus-moxtet-devices F: Documentation/devicetree/bindings/bus/moxtet.txt F: include/linux/moxtet.h F: drivers/bus/moxtet.c