Document support for the Interrupt Controller for Externel Devices
(INTC-EX) in the Renesas M3-W (r8a7796), V3M (r8a77970), and D3
(r8a77995) SoCs.

No driver update is needed.
Reviewed-by: NSimon Horman <horms+renesas@verge.net.au>
Signed-off-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: NMarc Zyngier <marc.zyngier@arm.com>

Renesas  RZ/G SoC have the R-Car gen2 compatible IRQC interrupt controllers.
Document RZ/G1[ME] (also known as R8A774[35]) SoC bindings.
Signed-off-by: NSergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Acked-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: NRob Herring <robh@kernel.org>

For some reason the name of the external interrupt controller
has changed name with r8a7795, so use "intc-ex" instead of "irqc"
as r8a7795 compat string to follow the friendly documentation.
Signed-off-by: NMagnus Damm <damm+renesas@opensource.se>
Reviewed-by: horms@verge.net.au
Acked-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Cc: jason@lakedaemon.net
Cc: Magnus Damm <magnus.damm@gmail.com>
Link: http://lkml.kernel.org/r/20150928094228.32552.83336.sendpatchset@little-appleSigned-off-by: NThomas Gleixner <tglx@linutronix.de>

The external IRQ controller has a functional clock, which is used for
power management. Document it.

Fix a typo in the r8a73a4 SoC name while we're at it.
Signed-off-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: NSimon Horman <horms+renesas@verge.net.au>
Link: https://lkml.kernel.org/r/1426704961-27322-4-git-send-email-geert+renesas@glider.beSigned-off-by: NJason Cooper <jason@lakedaemon.net>

  - r8a7792 (R-Car V2H)
  - r8a7793 (R-Car M2-N)
  - r8a7794 (R-Car E2)

r8a7791 is now called "R-Car M2-W".
Signed-off-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Link: https://lkml.kernel.org/r/1409212800-4957-3-git-send-email-geert+renesas@glider.beSigned-off-by: NJason Cooper <jason@lakedaemon.net>

The renesas-irqc driver supports DT, but the DT binding documentation was
missing.
Signed-off-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Acked-by: NSimon Horman <horms+renesas@verge.net.au>
Link: https://lkml.kernel.org/r/1409212800-4957-2-git-send-email-geert+renesas@glider.beSigned-off-by: NJason Cooper <jason@lakedaemon.net>