linux/Documentation/devicetree
Grygorii Strashko 2134cb997f gpio: syscon: reuse for keystone 2 socs
On Keystone SOCs, ARM host can send interrupts to DSP cores using the
DSP GPIO controller IP. Each DSP GPIO controller provides 28 IRQ signals for
each DSP core. This is one of the component used by the IPC mechanism used
on Keystone SOCs.

Keystone 2 DSP GPIO controller has specific features:
- each GPIO can be configured only as output pin;
- setting GPIO value to 1 causes IRQ generation on target DSP core;
- reading pin value returns 0 - if IRQ was handled or 1 - IRQ is still
  pending.

This patch updates gpio-syscon driver to be reused by Keystone 2 SoCs,
because the Keystone 2 DSP GPIO controller is controlled through Syscon
devices and, as requested by Linus Walleij, such kind of GPIO controllers
should be integrated with drivers/gpio/gpio-syscon.c driver.

Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-09-16 14:42:16 -07:00
..
bindings gpio: syscon: reuse for keystone 2 socs 2014-09-16 14:42:16 -07:00
00-INDEX Documentation/: update 00-INDEX files 2014-02-10 16:01:40 -08:00
booting-without-of.txt dt/bindings: Remove all references to device_type "ethernet-phy" 2014-01-16 11:11:51 +00:00
changesets.txt of: Transactional DT support. 2014-07-23 17:29:15 -06:00
todo.txt of: Add todo tasklist for Devicetree 2014-07-23 17:33:01 -06:00
usage-model.txt