[PATCH v2 1/2] ARM: imx6: disable deeper idle states when FEC is active w/o HW workaround

[Rob Herring]

On Fri, Jun 03, 2016 at 06:31:19PM +0200, Lucas Stach wrote:
> The i.MX6 Q/DL has an erratum (ERR006687) that prevents the FEC from
> waking the CPUs when they are in wait(unclocked) state. As the hardware
> workaround isn't applicable to all boards, disable the deeper idle state
> when the workaround isn't present and the FEC is in use.
> 
> This allows to safely run a kernel with CPUidle enabled on all i.MX6
> boards.
> 
> Signed-off-by: Lucas Stach <l.stach at pengutronix.de>
> Acked-by: David S. Miller <davem at davemloft.net> (for network changes)
> ---
> v2: Spell out "workaround" to avoid confusion.
> ---
>  Documentation/devicetree/bindings/net/fsl-fec.txt |  3 +++

Acked-by: Rob Herring <robh at kernel.org>

>  arch/arm/mach-imx/cpuidle-imx6q.c                 | 16 +++++++++++++++
>  drivers/net/ethernet/freescale/fec.h              |  2 ++
>  drivers/net/ethernet/freescale/fec_main.c         | 12 +++++++++++
>  include/soc/imx/cpuidle.h                         | 25 +++++++++++++++++++++++
>  5 files changed, 58 insertions(+)
>  create mode 100644 include/soc/imx/cpuidle.h