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Date:	Thu, 20 Mar 2014 11:59:11 +0900
From:	Chanwoo Choi <>
	Chanwoo Choi <>
Subject: [PATCHv4 3/5] devfreq: exynos4: Add CONFIG_PM_OPP dependency to fix
 probe fail

This patch add CONFIG_PM_OPP dependecy to exynos4_bus driver
to fix probe fail as following log:

[    3.721389] exynos4-busfreq busfreq.3: Fail to add opp entries.
[    3.721697] exynos4-busfreq: probe of busfreq.3 failed with error -22

If CONFIG_PM_OPP is disabled, dev_pm_opp_find_freq_floor() in xxx_probe()
will always return -EINVAL error.

Signed-off-by: Chanwoo Choi <>
 drivers/devfreq/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/devfreq/Kconfig b/drivers/devfreq/Kconfig
index 7d2f435..b2de2a1 100644
--- a/drivers/devfreq/Kconfig
+++ b/drivers/devfreq/Kconfig
@@ -70,6 +70,7 @@ config ARM_EXYNOS4_BUS_DEVFREQ
 	depends on (CPU_EXYNOS4210 || SOC_EXYNOS4212 || SOC_EXYNOS4412) && !ARCH_MULTIPLATFORM
 	select ARCH_HAS_OPP
+	select PM_OPP
 	  This adds the DEVFREQ driver for Exynos4210 memory bus (vdd_int)
 	  and Exynos4212/4412 memory interface and bus (vdd_mif + vdd_int).

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