clk: renesas: mstp: ensure register writes complete
authorChris Brandt <chris.brandt@renesas.com>
Tue, 14 Feb 2017 16:08:05 +0000 (11:08 -0500)
committerStephen Boyd <sboyd@codeaurora.org>
Thu, 16 Feb 2017 18:36:05 +0000 (10:36 -0800)
commitf59de563358eb9351b7f8f0ba2d3be2ebb70b93d
tree0e008be6cd260a00e1d49f024345af0a1d4abfa9
parent6ff8ec98e12f984b9d62e43f83b0a3c44e2bdc12
clk: renesas: mstp: ensure register writes complete

When there is no status bit, it is possible for the clock enable/disable
operation to have not completed by the time the driver code resumes
execution. This is due to the fact that write operations are sometimes
queued and delayed internally. Doing a read ensures the write operations
has completed.

Fixes: b6face404f38 ("ARM: shmobile: r7s72100: add essential clock nodes to dtsi")
Signed-off-by: Chris Brandt <chris.brandt@renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
drivers/clk/renesas/clk-mstp.c