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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:02:30 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:02:30 +0000 |
| commit | 76cb841cb886eef6b3bee341a2266c76578724ad (patch) | |
| tree | f5892e5ba6cc11949952a6ce4ecbe6d516d6ce58 /Documentation/ABI/testing/sysfs-driver-hid-picolcd | |
| parent | Initial commit. (diff) | |
| download | linux-76cb841cb886eef6b3bee341a2266c76578724ad.tar.xz linux-76cb841cb886eef6b3bee341a2266c76578724ad.zip | |
Adding upstream version 4.19.249.upstream/4.19.249upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'Documentation/ABI/testing/sysfs-driver-hid-picolcd')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-driver-hid-picolcd | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-driver-hid-picolcd b/Documentation/ABI/testing/sysfs-driver-hid-picolcd new file mode 100644 index 000000000..98fd81ad7 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-driver-hid-picolcd @@ -0,0 +1,43 @@ +What: /sys/bus/usb/devices/<busnum>-<devnum>:<config num>.<interface num>/<hid-bus>:<vendor-id>:<product-id>.<num>/operation_mode +Date: March 2010 +Contact: Bruno Prémont <bonbons@linux-vserver.org> +Description: Make it possible to switch the PicoLCD device between LCD + (firmware) and bootloader (flasher) operation modes. + + Reading: returns list of available modes, the active mode being + enclosed in brackets ('[' and ']') + + Writing: causes operation mode switch. Permitted values are + the non-active mode names listed when read. + + Note: when switching mode the current PicoLCD HID device gets + disconnected and reconnects after above delay (see attribute + operation_mode_delay for its value). + + +What: /sys/bus/usb/devices/<busnum>-<devnum>:<config num>.<interface num>/<hid-bus>:<vendor-id>:<product-id>.<num>/operation_mode_delay +Date: April 2010 +Contact: Bruno Prémont <bonbons@linux-vserver.org> +Description: Delay PicoLCD waits before restarting in new mode when + operation_mode has changed. + + Reading/Writing: It is expressed in ms and permitted range is + 0..30000ms. + + +What: /sys/bus/usb/devices/<busnum>-<devnum>:<config num>.<interface num>/<hid-bus>:<vendor-id>:<product-id>.<num>/fb_update_rate +Date: March 2010 +Contact: Bruno Prémont <bonbons@linux-vserver.org> +Description: Make it possible to adjust defio refresh rate. + + Reading: returns list of available refresh rates (expressed in Hz), + the active refresh rate being enclosed in brackets ('[' and ']') + + Writing: accepts new refresh rate expressed in integer Hz + within permitted rates. + + Note: As device can barely do 2 complete refreshes a second + it only makes sense to adjust this value if only one or two + tiles get changed and it's not appropriate to expect the application + to flush its tiny changes explicitly at higher than default rate. + |