linux-kernel - [PATCH v3 0/3] Migrate the PCIe-IDIO-24 and WS16C48 GPIO drivers to the regmap API

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Date:   Sun,  5 Mar 2023 12:01:31 -0500
From:   William Breathitt Gray <william.gray@...aro.org>
To:     linus.walleij@...aro.org, brgl@...ev.pl
Cc:     linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
        broonie@...nel.org,
        William Breathitt Gray <william.gray@...aro.org>,
        techsupport@...systems.com, pdemetrotion@...systems.com,
        quarium@...il.com, jhentges@...esio.com, jay.dolan@...esio.com
Subject: [PATCH v3 0/3] Migrate the PCIe-IDIO-24 and WS16C48 GPIO drivers to the regmap API

Changes in v3:
 - Drop map from set_type_config() parameter list; regmap can be passed
   by irq_drv_data instead
 - Adjust ws16c48_set_type_config() for parameter list
 - Add mutex to prevent clobbering the COS_ENABLE register when masking
   IRQ and setting their type configuration
Changes in v2:
 - Simplify PCIe-IDIO-24 register offset defines to remove superfluous
   arithmetic
 - Check for NULL pointer after chip->irq_drv_data allocation
 - Set gpio_regmap drvdata and use gpio_regmap_get_drvdata() to get the
   regmap in idio_24_reg_map_xlate()

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.

A patch to pass irq_drv_data as a parameter for struct regmap_irq_chip
set_type_config() is included. This is needed by the
idio_24_set_type_config() and ws16c48_set_type_config() callbacks in
order to update the type configuration on their respective devices.

A patch to migrate the WS16C48 GPIO driver to the regmap API is included
in this patchset due to its dependence on the struct regmap_irq_chip
set_type_config() change.

William Breathitt Gray (3):
  regmap: Pass irq_drv_data as a parameter for set_type_config()
  gpio: pcie-idio-24: Migrate to the regmap API
  gpio: ws16c48: Migrate to the regmap API

 drivers/base/regmap/regmap-irq.c |   8 +-
 drivers/gpio/Kconfig             |   6 +
 drivers/gpio/gpio-pcie-idio-24.c | 709 ++++++++++++-------------------
 drivers/gpio/gpio-ws16c48.c      | 566 +++++++++---------------
 include/linux/regmap.h           |   6 +-
 5 files changed, 496 insertions(+), 799 deletions(-)


base-commit: 4827aae061337251bb91801b316157a78b845ec7
-- 
2.39.2