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path: root/drivers/input/touchscreen/goodix_berlin_i2c.c
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2025-03-10Input: goodix_berlin - add support for Berlin-A seriesJens Reidel
The current implementation of the goodix_berlin driver lacks support for revisions A and B of the Berlin IC. This change adds support for the gt9897 IC, which is a Berlin-A revision part. The differences between revision D and A are rather minor, a handful of address changes and a slightly larger read buffer. They were taken from the driver published by Goodix, which does a few more things that don't appear to be necessary for the touchscreen to work properly. Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org> Tested-by: Luca Weiss <luca.weiss@fairphone.com> Signed-off-by: Jens Reidel <adrian@mainlining.org> Link: https://lore.kernel.org/r/20250309062315.35720-3-adrian@mainlining.org Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2024-07-19Input: goodix-berlin - add sysfs interface for reading and writing touch IC ↵Charles Wang
registers Export a sysfs interface that would allow reading and writing touchscreen IC registers. With this interface many things can be done in usersapce such as firmware updates. An example tool that utilizes this interface for performing firmware updates can be found at [1]. [1] https://github.com/goodix/fwupdate_for_berlin_linux Signed-off-by: Charles Wang <charles.goodix@gmail.com> Link: https://lore.kernel.org/r/20240514115135.21410-1-charles.goodix@gmail.com Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2024-05-13Input: drop explicit initialization of struct i2c_device_id::driver_data to 0Uwe Kleine-König
These drivers don't use the driver_data member of struct i2c_device_id, so don't explicitly initialize this member. This prepares putting driver_data in an anonymous union which requires either no initialization or named designators. But it's also a nice cleanup on its own. While add it, also remove commas after the sentinel entries. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Link: https://lore.kernel.org/r/20240509174158.2211071-2-u.kleine-koenig@pengutronix.de Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2024-01-30Input: goodix-berlin - add I2C support for Goodix Berlin Touchscreen ICNeil Armstrong
Add initial support for the new Goodix "Berlin" touchscreen ICs over the I2C interface. This initial driver is derived from the Goodix goodix_ts_berlin available at [1] and [2] and only supports the GT9916 IC present on the Qualcomm SM8550 MTP & QRD touch panel. The current implementation only supports BerlinD, aka GT9916. [1] https://github.com/goodix/goodix_ts_berlin [2] https://git.codelinaro.org/clo/la/platform/vendor/opensource/touch-drivers Reviewed-by: Jeff LaBundy <jeff@labundy.com> Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org> Link: https://lore.kernel.org/r/20240129-topic-goodix-berlin-upstream-initial-v15-3-6f7d096c0a0a@linaro.org Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>