[PATCH v7 0/9] backlight: gpio: simplify the driver

From: Bartosz Golaszewski
Date: Tue Oct 22 2019 - 04:37:17 EST

From: Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx>

While working on my other series related to gpio-backlight[1] I noticed
that we could simplify the driver if we made the only user of platform
data use GPIO lookups and device properties. This series tries to do

First two patches contain minor fixes. Third patch makes the driver
explicitly drive the GPIO line. Fourth patch adds all necessary data
structures to ecovec24. Patch 5/9 unifies much of the code for both
pdata and non-pdata cases. Patches 6-7/9 remove unused platform data
fields. Last two patches contain additional improvements for the GPIO
backlight driver while we're already modifying it.

I don't have access to this HW but hopefully this works. Only compile

[1] https://lkml.org/lkml/2019/6/25/900

v1 -> v2:
- rebased on top of v5.3-rc1 and adjusted to the recent changes from Andy
- added additional two patches with minor improvements

v2 -> v3:
- in patch 7/7: used initializers to set values for pdata and dev local vars

v3 -> v4:
- rebased on top of v5.4-rc1
- removed changes that are no longer relevant after commit ec665b756e6f
("backlight: gpio-backlight: Correct initial power state handling")
- added patch 7/7

v4 -> v5:
- in patch 7/7: added a comment replacing the name of the function being
pulled into probe()

v5 -> v6:
- added a patch making the driver explicitly set the direction of the GPIO
to output
- added a patch removing a redundant newline

v6 -> v7:
- renamed the function calculating the new GPIO value for status update
- collected more tags

Bartosz Golaszewski (9):
backlight: gpio: remove unneeded include
backlight: gpio: remove stray newline
backlight: gpio: explicitly set the direction of the GPIO
sh: ecovec24: add additional properties to the backlight device
backlight: gpio: simplify the platform data handling
sh: ecovec24: don't set unused fields in platform data
backlight: gpio: remove unused fields from platform data
backlight: gpio: use a helper variable for &pdev->dev
backlight: gpio: pull gpio_backlight_initial_power_state() into probe

arch/sh/boards/mach-ecovec24/setup.c | 33 +++--
drivers/video/backlight/gpio_backlight.c | 128 +++++++------------
include/linux/platform_data/gpio_backlight.h | 3 -
3 files changed, 69 insertions(+), 95 deletions(-)