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| author | Linus Walleij <linusw@kernel.org> | 2026-02-18 14:44:38 +0100 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.com> | 2026-03-12 14:05:20 +0100 |
| commit | 200e6c6e94fa786e36e4fe33eebf16b822181b99 (patch) | |
| tree | 47d860300b00fd4fa33b9b978c710ebcf693d5b6 /scripts | |
| parent | ab05515757fcb77edbbe7c68fbc7c0c930c0f668 (diff) | |
HID: mcp2221: Add module parameter to enfoce GPIO mode
Add a module parameter to MCP2221 to enfor GPIO mode on the
general purpose pins GP0 thru GP3.
If I plug a device of this type into my machine, it will use the
GP0, GP1, GP2 and GP3 pins for IIO voltage readings by default
if CONFIG_IIO is set.
However there may be cases where IIO is available but we want to
use the GP0 thru GP3 lines for GPIO anyway.
Example use:
insmode hid-mcp2221.ko gpio_mode_enforce=1
Result in dmesg:
mcp2221 0003:04D8:00DD.0005: GPIO 0 not in gpio mode
mcp2221 0003:04D8:00DD.0005: GPIO 1 not in gpio mode
mcp2221 0003:04D8:00DD.0005: GPIO 2 not in gpio mode
mcp2221 0003:04D8:00DD.0005: GPIO 3 not in gpio mode
mcp2221 0003:04D8:00DD.0005: Set GPIO mode for gpio pin 0!
mcp2221 0003:04D8:00DD.0005: Set GPIO mode for gpio pin 1!
mcp2221 0003:04D8:00DD.0005: Set GPIO mode for gpio pin 2!
mcp2221 0003:04D8:00DD.0005: Set GPIO mode for gpio pin 3!
After this the gpiolib tools such as gpioset can be used to alter
the GPIO line values successfully.
Signed-off-by: Linus Walleij <linusw@kernel.org>
Signed-off-by: Jiri Kosina <jkosina@suse.com>
Diffstat (limited to 'scripts')
0 files changed, 0 insertions, 0 deletions