[PATCH V2 0/6] gpio: davinci: Redesign driver to accommodate ngpios in one gpio chip
From: Keerthy
Date: Thu Jan 12 2017 - 23:21:33 EST
The Davinci GPIO driver is implemented to work with one monolithic
Davinci GPIO platform device which may have up to Y(144) gpios.
The Davinci GPIO driver instantiates number of GPIO chips with
max 32 gpio pins per each during initialization and one IRQ domain.
So, the current GPIO's opjects structure is:
<platform device> Davinci GPIO controller
|- <gpio0_chip0> ------|
... |--- irq_domain (hwirq [0..143])
|- <gpio0_chipN> ------|
Current driver creates one chip for every 32 GPIOs in a controller.
This was a limitation earlier now there is no need for that. Hence
redesigning the driver to create one gpio chip for all the ngpio
in the controller.
|- <gpio0_chip0> ------|--- irq_domain (hwirq [0..143]).
The previous discussion on this can be found here:
https://www.spinics.net/lists/linux-omap/msg132869.html
The series is posted on top of:
https://lkml.org/lkml/2017/1/4/94
Changes in v2:
* Optimized the re-design patch.
* Added couple of code clean ups after the re-design.
* Included v2 of https://patchwork.ozlabs.org/patch/710855/
Keerthy (6):
gpio: davinci: Remove gpio2regs function to accommodate multi
instances
gpio: davinci: Remove unwanted blank line
gpio: davinci: Redesign driver to accommodate ngpios in one gpio chip
gpio: davinci: Add support for multiple GPIO controllers
gpio: davinci: Remove custom .xlate
gpio: davinci: Remove redundant macros
drivers/gpio/gpio-davinci.c | 174 +++++++++++++----------------
include/linux/platform_data/gpio-davinci.h | 20 ++--
2 files changed, 90 insertions(+), 104 deletions(-)
--
1.9.1