linux-kernel - [PATCH v5 0/3] adp5588-keys: Support for dedicated gpio operation

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Message-Id: <20240703-adp5588_gpio_support-v5-0-49fcead0d390@analog.com>
Date: Wed, 03 Jul 2024 11:58:13 +0100
From: Utsav Agarwal via B4 Relay <devnull+utsav.agarwal.analog.com@...nel.org>
To: Utsav Agarwal <utsav.agarwal@...log.com>, 
 Michael Hennerich <michael.hennerich@...log.com>, 
 Dmitry Torokhov <dmitry.torokhov@...il.com>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Nuno Sá <nuno.sa@...log.com>
Cc: linux-input@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, 
 Arturs Artamonovs <arturs.artamonovs@...log.com>, 
 Vasileios Bimpikas <vasileios.bimpikas@...log.com>, 
 Oliver Gaskell <oliver.gaskell@...log.com>
Subject: [PATCH v5 0/3] adp5588-keys: Support for dedicated gpio operation

Current state of the driver for the ADP5588/87 only allows partial
I/O to be used as GPIO. This support was previously present as a
separate gpio driver, which was dropped with the commit
5ddc896088b0 ("gpio: gpio-adp5588: drop the driver") since the
functionality was deemed to have been merged with adp5588-keys.

This series of patches re-enables this support by allowing the driver to 
relax the requirement for registering a keymap and enable pure GPIO 
operation. 

Changelog
==========

V2: 
	-  Changed gpio_only from a local variable to a member of struct
	adp5588_kpad
	-  Removed condition from adp5588_probe() to skip adp5588_fw_parse() if 
	gpio-only specified. adp558_fw_parse() now handles and returns
	0 if gpio-only has been specified.
	-  Added a check in adp5588_fw_parse() to make sure keypad 
	properties(keypad,num-columns and keypad,num-rows) were not defined when 
	gpio-only specified

V3:
	-  Moved device_property_present() for reading "gpio-only" into 
	adp558_fw_parse()
	-  Added print statements in case of error

V4:
	- Added dt-bindings patch

Signed-off-by: Utsav Agarwal <utsav.agarwal@...log.com>
---
V5:
	- Removed extra property "gpio-only", now pure gpio mode is
	  detected via the adbsence of keypad specific properties.
	- Added dependencies for keypad properties to preserve
	  the original requirements in case a pure gpio mode is not
	  being used.
	- Added additional description for why the "interrupts" property
	  was made optional
	- Rebased current work based on https://lore.kernel.org/linux-input/ZoLt_qBCQS-tG8Ar@google.com/
- Link to v4: https://lore.kernel.org/r/20240701-adp5588_gpio_support-v4-0-44bba0445e90@analog.com

---
Dmitry Torokhov (1):
      iInput: adp5588-keys - use guard notation when acquiring mutexes

Utsav Agarwal (2):
      Input: adp5588-keys - add support for pure gpio
      dt-bindings: input: Update dtbinding for adp5588

 .../devicetree/bindings/input/adi,adp5588.yaml     | 33 ++++++++--
 drivers/input/keyboard/adp5588-keys.c              | 70 ++++++++++++----------
 2 files changed, 66 insertions(+), 37 deletions(-)
---
base-commit: 1c52cf5e79d30ac996f34b64284f2c317004d641
change-id: 20240701-adp5588_gpio_support-65db2bd21a9f

Best regards,
-- 
Utsav Agarwal <utsav.agarwal@...log.com>