| Message ID | 20230325154711.2419569-4-xiang.ye@intel.com |
|---|---|
| State | Superseded |
| Headers | show |
| Series | Add Intel LJCA device driver | expand |
On 25.03.23 16:47, Ye Xiang wrote: > Add sysfs attributes Documentation entries for LJCA device Hi, do we really want each driver to have its own attribute for that? It seems to me that that should be unified. Regards Oliver > + > +What: /sys/bus/usb/.../ljca_enable_dfu > +Date: July 2023 > +KernelVersion: 6.4 > +Contact: Ye Xiang<xiang.ye@intel.com> > +Description: > + Writing 1 to this file to force the LJCA device into DFU > + mode so the firmware can be updated. After firmware > + updating has been done, the device will back to normal > + working mode.
Hi Oliver Thanks for the review. On Tue, Apr 04, 2023 at 10:53:48AM +0200, Oliver Neukum wrote: > > > On 25.03.23 16:47, Ye Xiang wrote: > > Add sysfs attributes Documentation entries for LJCA device > > Hi, > > do we really want each driver to have its own attribute for that? > It seems to me that that should be unified. Three ABI entries are added in this patch: ljca_version, ljca_trace_level, and ljca_enable_dfu. The first two items are specified for LJCA device and I think they can be kept in sysfs-bus-usb-devices-ljca. But for ljca_enable_dfu, I didn't see a unified DFU entry in sys-bus-usb. I am not sure whether other USB devices have similar DFU mode or not. Any suggestions? Thanks Ye Xiang > > > + > > +What: /sys/bus/usb/.../ljca_enable_dfu > > +Date: July 2023 > > +KernelVersion: 6.4 > > +Contact: Ye Xiang<xiang.ye@intel.com> > > +Description: > > + Writing 1 to this file to force the LJCA device into DFU > > + mode so the firmware can be updated. After firmware > > + updating has been done, the device will back to normal > > + working mode.
On 10.04.23 12:44, Ye, Xiang wrote: Hi, >> do we really want each driver to have its own attribute for that? >> It seems to me that that should be unified. > Three ABI entries are added in this patch: ljca_version, ljca_trace_level, > and ljca_enable_dfu. The first two items are specified for LJCA device and > I think they can be kept in sysfs-bus-usb-devices-ljca. > > But for ljca_enable_dfu, I didn't see a unified DFU entry in sys-bus-usb. > I am not sure whether other USB devices have similar DFU mode or not. > > Any suggestions? What exactly does this attribute do? Is it in addition to the normal DFU_DETACH + reset sequence, is it needed for DFU_DETACH to work, does it enable the DFU class interface descriptor? A point of DFU is rather that the capability should be announced via descriptors. The answer would depend on what exactly this attribute does. Regards Oliver
diff --git a/Documentation/ABI/testing/sysfs-bus-usb-devices-ljca b/Documentation/ABI/testing/sysfs-bus-usb-devices-ljca new file mode 100644 index 000000000000..16eecaf870e2 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-bus-usb-devices-ljca @@ -0,0 +1,36 @@ +What: /sys/bus/usb/.../ljca_version +Date: July 2023 +KernelVersion: 6.4 +Contact: Ye Xiang <xiang.ye@intel.com> +Description: + Provides the current firmware version of LJCA device. + The format is Major.Minor.Patch.Build, where + Major, Minor, Patch, and Build are decimal numbers. + For example: 1.0.0.256 + +What: /sys/bus/usb/.../ljca_enable_dfu +Date: July 2023 +KernelVersion: 6.4 +Contact: Ye Xiang <xiang.ye@intel.com> +Description: + Writing 1 to this file to force the LJCA device into DFU + mode so the firmware can be updated. After firmware + updating has been done, the device will back to normal + working mode. + +What: /sys/bus/usb/.../ljca_trace_level +Date: July 2023 +KernelVersion: 6.4 +Contact: Ye Xiang <xiang.ye@intel.com> +Description: + Writing N to this file to set firmware log level of LJCA + device. The log can be printed to another computer through + UART ports in LJCA device. Valid values: + + == ========== + 0 LEVEL_ERROR + 1 LEVEL_WARNING + 2 LEVEL_INFO + 3 LEVEL_DEBUG + 4 LEVEL_OFF + == ==========
Add sysfs attributes Documentation entries for LJCA device Signed-off-by: Ye Xiang <xiang.ye@intel.com> --- .../ABI/testing/sysfs-bus-usb-devices-ljca | 36 +++++++++++++++++++ 1 file changed, 36 insertions(+) create mode 100644 Documentation/ABI/testing/sysfs-bus-usb-devices-ljca