[spi-devel-general] [PATCH] SPI: fix APB pclk power regression on U300

[Kevin Wells]

> With the introduction of an AMBA PrimeCell per-cell block clock,
> the pclk was left on after probe() unless explicitly disabled.
> This clock is wired to the same clock on PL022 causing it to stay
> always on since.
>
> Fix this up properly by clocking the pclk whenever we want to
> write into any PL022 registers and clocking the external clock
> whenever we want to transmit messages on the bus.
>
> Signed-off-by: Linus Walleij <linus.walleij at stericsson.com>
> ---
> Tested on U300 and U8500, even though the pclk stuff came in from
> the ARM tree it is probably better to carry this through Grants
> tree so as not to disturb other patches going in for PL022.
> ---
>  drivers/spi/amba-pl022.c |   14 ++++++++------
>  1 files changed, 8 insertions(+), 6 deletions(-)
>

Tested-by : Kevin Wells <wellsk40 at gmail.com>