On Tue, Sep 27, 2016 at 05:48:45PM +0200, Neil Armstrong wrote:

Since the I2C sx150x GPIO expander driver uses platform_data to manage
the pins configurations, rewrite the driver as a pinctrl driver using
pinconf to get/set pin configurations from DT or debugfs.

The pinctrl driver is functionnally equivalent as the gpio-only driver
and can use DT for pinconf. The platform_data confirmation is dropped.

This patchset removed the gpio-only driver and selects the Pinctrl driver
config instead. This patchset also migrates the gpio dt-bindings to pinctrl
and add the pinctrl optional properties.

The driver was tested with a SX1509 device on a BeagleBone black with
interrupt support and on an X86_64 machine over an I2C to USB converter.

Signed-off-by: Neil Armstrong <redacted>
---
This is a fixed version that builds and runs on non-OF platforms and on
arm based OF. The GPIO version is removed and the bindings are also moved
to the pinctrl bindings.

One remaining question, should i2c_driver remove be implemented ?
It would be quite hard to implement due to the interrupt controller.

Changes since v1 at http://lkml.kernel.org/r/1473166599-29266-1-git-send-email-narmstrong@baylibre.com:
 - Fix Kconfig descriptions on pinctrl and gpio
 - Fix Kconfig dependency
 - Remove oscio support for non-789 devices
 - correct typo in dt bindings
 - remove probe reset for non-789 devices

Changes since RFC at http://lkml.kernel.org/r/1472130692-14404-1-git-send-email-narmstrong@baylibre.com:
 - Put #ifdef CONFIG_OF/CONFIG_OF_GPIO to remove OF code for non-of platforms
 - No more rely on OF_GPIO config
 - Moved and enhanced bindings to pinctrl bindings
 - Removed gpio-sx150x.c
 - Temporary select PINCTRL_SX150X when GPIO_SX150X
 - Temporary mark GPIO_SX150X as deprecated


 .../gpio-sx150x.txt => pinctrl/pinctrl-sx150x.txt} |   46 +-

Acked-by: Rob Herring <robh@kernel.org>

 drivers/gpio/Kconfig                               |   13 +-
 drivers/gpio/Makefile                              |    1 -
 drivers/pinctrl/Kconfig                            |   14 +
 drivers/pinctrl/Makefile                           |    1 +
 .../gpio-sx150x.c => pinctrl/pinctrl-sx150x.c}     | 1179 ++++++++++++--------
 6 files changed, 782 insertions(+), 472 deletions(-)
 rename Documentation/devicetree/bindings/{gpio/gpio-sx150x.txt => pinctrl/pinctrl-sx150x.txt} (40%)
 rename drivers/{gpio/gpio-sx150x.c => pinctrl/pinctrl-sx150x.c} (24%)