linux-kernel - [PATCH v2 0/6] Migrate IDIO-16 GPIO drivers to regmap API

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Message-Id: <cover.1677515341.git.william.gray@linaro.org>
Date:   Mon, 27 Feb 2023 11:45:21 -0500
From:   William Breathitt Gray <william.gray@...aro.org>
To:     linus.walleij@...aro.org, brgl@...ev.pl
Cc:     broonie@...nel.org, andriy.shevchenko@...ux.intel.com,
        linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
        William Breathitt Gray <william.gray@...aro.org>
Subject: [PATCH v2 0/6] Migrate IDIO-16 GPIO drivers to regmap API

Changes in v2:
 - Utilize memset32() to set status_buf for no_status case
 - Utilize GENMASK() to generate status_buf mask
 - Move no_status kernel doc line under runtime_pm line
 - Add comma to end of idio_16_names initialization list
 - Set io_port to true in idio_16_regmap_config

The regmap API supports IO port accessors so we can take advantage of
regmap abstractions rather than handling access to the device registers
directly in the driver. The 104-idio-16 and pci-idio-16 modules depend
on the IDIO-16 library and are thus updated accordingly.

The 104-IDIO-16 lacks a status register (as does the 104-DIO-48E), so a
no_status flag is introduced to the regmap-irq API to properly handle
such cases and avoid hacks. The 104-dio-48e module is updated in a
subsequent patch to take advantage of this new no_status flag.

By leveraging the regmap API, the idio-16 library is reduced to simply a
devm_idio_16_regmap_register() function and a configuration structure
struct idio_16_regmap_config.

William Breathitt Gray (6):
  regmap-irq: Add no_status support
  gpio: 104-dio-48e: Utilize no_status regmap-irq flag
  gpio: idio-16: Migrate to the regmap API
  gpio: 104-idio-16: Migrate to the regmap API
  gpio: pci-idio-16: Migrate to the regmap API
  gpio: idio-16: Remove unused legacy interface

 drivers/base/regmap/regmap-irq.c |  22 ++-
 drivers/gpio/Kconfig             |   7 +-
 drivers/gpio/gpio-104-dio-48e.c  |   6 +-
 drivers/gpio/gpio-104-idio-16.c  | 294 ++++++++----------------------
 drivers/gpio/gpio-idio-16.c      | 255 ++++++++++++++------------
 drivers/gpio/gpio-idio-16.h      |  80 +++------
 drivers/gpio/gpio-pci-idio-16.c  | 296 +++++++------------------------
 include/linux/regmap.h           |   2 +
 8 files changed, 326 insertions(+), 636 deletions(-)

base-commit: 4827aae061337251bb91801b316157a78b845ec7
-- 
2.39.2