71a6ecf5406a
author Viresh Kumar <viresh.kumar@st.com> 1312538554 +0530
committer Vinod Koul <vinod.koul@intel.com> 1314281018 +0530

dmaengine/amba-pl08x: Simplify pl08x_ensure_on()

Simply writing 1 on bit 0 is sufficient instead of reading and clearing bits.
Also as per manual, for bit 3-31 of DMACConfiguration register:
"read undefined, write as 0"

So, we must not rely on values read from this registers bit 3-31.

Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

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