mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-24 05:04:00 +08:00
dc7a12bdfc
Converts ARM the text files to ReST, preparing them to be an architecture book. The conversion is actually: - add blank lines and identation in order to identify paragraphs; - fix tables markups; - add some lists markups; - mark literal blocks; - adjust title markups. At its new index.rst, let's add a :orphan: while this is not linked to the main index.rst file, in order to avoid build warnings. Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org> Reviewed-by Corentin Labbe <clabbe.montjoie@gmail.com> # For sun4i-ss
42 lines
1.2 KiB
ReStructuredText
42 lines
1.2 KiB
ReStructuredText
===========================
|
|
Samsung GPIO implementation
|
|
===========================
|
|
|
|
Introduction
|
|
------------
|
|
|
|
This outlines the Samsung GPIO implementation and the architecture
|
|
specific calls provided alongside the drivers/gpio core.
|
|
|
|
|
|
S3C24XX (Legacy)
|
|
----------------
|
|
|
|
See Documentation/arm/samsung-s3c24xx/gpio.rst for more information
|
|
about these devices. Their implementation has been brought into line
|
|
with the core samsung implementation described in this document.
|
|
|
|
|
|
GPIOLIB integration
|
|
-------------------
|
|
|
|
The gpio implementation uses gpiolib as much as possible, only providing
|
|
specific calls for the items that require Samsung specific handling, such
|
|
as pin special-function or pull resistor control.
|
|
|
|
GPIO numbering is synchronised between the Samsung and gpiolib system.
|
|
|
|
|
|
PIN configuration
|
|
-----------------
|
|
|
|
Pin configuration is specific to the Samsung architecture, with each SoC
|
|
registering the necessary information for the core gpio configuration
|
|
implementation to configure pins as necessary.
|
|
|
|
The s3c_gpio_cfgpin() and s3c_gpio_setpull() provide the means for a
|
|
driver or machine to change gpio configuration.
|
|
|
|
See arch/arm/plat-samsung/include/plat/gpio-cfg.h for more information
|
|
on these functions.
|