i2c: s3c2410: dont need CPU_FREQ transitions for exynos series
authorNaveen Krishna Ch <ch.naveen@samsung.com>
Tue, 26 Nov 2013 04:22:46 +0000 (09:52 +0530)
committerWolfram Sang <wsa@the-dreams.de>
Fri, 3 Jan 2014 16:40:37 +0000 (17:40 +0100)
commit61f4d6b42158a836a008711a71b68cc78b0624aa
tree980b9746c04ec3e4b59b9a39c6431eb0df9622e4
parent117053f77a5a4d055ec4fc7b4f6639045a24fefd
i2c: s3c2410: dont need CPU_FREQ transitions for exynos series

For Exynos4 and Exynos5 SoCs from Samsung the i2c clock is based
on a fixed 66 MHz peripheral clock, and therefore is completely
independent of the cpu frequency.
Thus, registering for a CPU freq notifier is very wasteful.

This patch modifes the code such that, i2c bus registers to
cpu_freq_transition only if CONFIG_CPU_FREQ_S3C24XX is enabled.

This change should save a bunch of cpufreq transitions calls
which does not apply to exynos SoCs.

Signed-off-by: Naveen Krishna Chatradhi <ch.naveen@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: Doug Anderson <dianders@chromium.org>
Reviewed-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
drivers/i2c/busses/i2c-s3c2410.c