[PATCHv4,0/4] EXC3000 Updates

Message

Sebastian Reichel Aug. 5, 2020, 4:05 p.m. UTC

Hi,

This is PATCHv3 of the EXC80Hxx support patchset.

Changes since [PATCHv3]:
 - reorder last two patches
 - register 'fw_version' and 'model' sysfs files in i2c device's
   sysfs node instead of input device
 - Add Reviewed-by from Enric
 - Add Rob Herring and DT mailinglist
 - Drop probe_new API patch (applied)

Changes since [PATCHv2]:
 - add #include <linux/size.h> for SZ_4K and SZ_16K (kbuild test bot)
 - fw_version_show must be ssize_t (kbuild test bot)
 - rename YAML binding file to include eeti, prefix (Enric)
 - noise from gpio-reset patch (Enric)
 - add comment for the retry loop (Enric, Martin)
 - document sysfs entries (Enric)

Changes since [PATCHv1]:
 - prepend new patch converting binding document to YAML
 - prepend new patch switching to I2C probe_new
 - append new patch adding reset-gpio support
 - use explicit compatible values for the touchscreen chips instead of
   a wildcast. Since the documentation, that I have is very vague let's
   use different values for exc80h60 and exc80h84. This avoids wildcard
   DT entries and means we are prepared when noticing differences
   between the chips.
 - add accidently removed terminator entry in exc3000_id
 - use device structure with max_xy and name (suggested by Martin)
 - use SZ_4K, SZ_16K defines (suggested by Dmitry)
 - harden event check, so that MT1 and MT2 based chips only allow
   their own event type.
 - write more detailed commit description in the fw_version/model
   sysfs patch to explain why the values are not cached and why
   the simpler read(); sleep(); write() approach has not been used
 - use DEVICE_ATTR_RO() in fw_version/model patch to improve readability
 - fw_version/model: replace memcpy + null termination with strlcpy
 - fw_version/model: increase buffer size for weird firmware versions
 - fw_version/model: use sizeof() instead of hardcoded buffer sizes
 - simplify exc3000_query_interrupt() by moving the complete() call to
   the exc3000_interrupt().

I think I only ignored one review feedback, that the fw_version and
model sysfs nodes are attached to the input device instead of the
i2c device. This was done to avoid being racy:

http://kroah.com/log/blog/2013/06/26/how-to-create-a-sysfs-file-correctly/

Thanks in advance for looking at the patches,

-- Sebastian

[PATCHv3] https://lore.kernel.org/linux-input/[e-mail]/
[PATCHv2] https://lore.kernel.org/linux-input/[e-mail]/
[PATCHv1] https://lore.kernel.org/linux-input/[e-mail]/

Sebastian Reichel (4):
  dt-bindings: touchscreen: Convert EETI EXC3000 touchscreen to
    json-schema
  Input: EXC3000: add EXC80H60 and EXC80H84 support
  Input: EXC3000: Add reset gpio support
  Input: EXC3000: Add support to query model and fw_version

 .../ABI/testing/sysfs-driver-input-exc3000    |  15 ++
 .../input/touchscreen/eeti,exc3000.yaml       |  58 ++++
 .../bindings/input/touchscreen/exc3000.txt    |  26 --
 drivers/input/touchscreen/exc3000.c           | 249 +++++++++++++++++-
 4 files changed, 308 insertions(+), 40 deletions(-)
 create mode 100644 Documentation/ABI/testing/sysfs-driver-input-exc3000
 create mode 100644 Documentation/devicetree/bindings/input/touchscreen/eeti,exc3000.yaml
 delete mode 100644 Documentation/devicetree/bindings/input/touchscreen/exc3000.txt