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| author | Naveen Krishna Ch <ch.naveen@samsung.com> | 2013-11-26 05:22:46 +0100 |
|---|---|---|
| committer | Wolfram Sang <wsa@the-dreams.de> | 2014-01-03 17:40:37 +0100 |
| commit | 61f4d6b42158a836a008711a71b68cc78b0624aa (patch) | |
| tree | 980b9746c04ec3e4b59b9a39c6431eb0df9622e4 /drivers/i2c/busses | |
| parent | i2c: s3c2410: Add polling mode support (diff) | |
| download | linux-61f4d6b42158a836a008711a71b68cc78b0624aa.tar.xz linux-61f4d6b42158a836a008711a71b68cc78b0624aa.zip | |
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>
Diffstat (limited to 'drivers/i2c/busses')
| -rw-r--r-- | drivers/i2c/busses/i2c-s3c2410.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/i2c/busses/i2c-s3c2410.c b/drivers/i2c/busses/i2c-s3c2410.c index 09f251d0716f..db39d87bdc55 100644 --- a/drivers/i2c/busses/i2c-s3c2410.c +++ b/drivers/i2c/busses/i2c-s3c2410.c @@ -124,7 +124,7 @@ struct s3c24xx_i2c { struct s3c2410_platform_i2c *pdata; int gpios[2]; struct pinctrl *pctrl; -#ifdef CONFIG_CPU_FREQ +#if defined(CONFIG_ARM_S3C24XX_CPUFREQ) struct notifier_block freq_transition; #endif }; @@ -887,7 +887,7 @@ static int s3c24xx_i2c_clockrate(struct s3c24xx_i2c *i2c, unsigned int *got) return 0; } -#ifdef CONFIG_CPU_FREQ +#if defined(CONFIG_ARM_S3C24XX_CPUFREQ) #define freq_to_i2c(_n) container_of(_n, struct s3c24xx_i2c, freq_transition) |