On 11/19/14 04:10, Tyler Baker wrote: Hi,
+ Arnd, Olof and Kevin > This patch fixes a long standing issue introduced during the 3.16 merge > window. > Shortly after the merge, exynos5250-based arndale boards began to produce the > following errors: > > kern.err kernel: exynos-cpufreq exynos-cpufreq: failed to set cpu voltage > kern.err kernel: cpufreq: __target_index: Failed to change cpu frequency: -22 > > Further analysis revealed that the S5M8767 voltage regulator used on the > exynos5250-based arndale board utilizes the S3C2410 I2C controller. If the > S3C2410 I2C controller driver is not enabled, the S5M8767 voltage regulator > fails to probe. Therefore a dependency exists between these two drivers. > In the exynos_defconfig both CONFIG_REGULATOR_S5M8767 and CONFIG_I2C_S3C2410 > options are enabled, and no errors are produced. However, in the > multi_v7_defconfig only the CONFIG_REGULATOR_S5M8767 option is enabled and > the > errors are present. So let's enable the CONFIG_I2C_S3C2410 option in the > multi_v7_defconfig to allow the S5M8767 voltage regulator to probe. > > Signed-off-by: Tyler Baker <[email protected]> Acked-by: Kukjin Kim <[email protected]> Thanks, Kukjin > --- > This issue was reported [1]. I've also confirmed this fix on two different > arndale boards. > > [1] > https://www.mail-archive.com/[email protected]/msg38765.html > > arch/arm/configs/multi_v7_defconfig | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/arch/arm/configs/multi_v7_defconfig > b/arch/arm/configs/multi_v7_defconfig > index 3487046..9d7a32f 100644 > --- a/arch/arm/configs/multi_v7_defconfig > +++ b/arch/arm/configs/multi_v7_defconfig > @@ -217,6 +217,7 @@ CONFIG_I2C_CADENCE=y > CONFIG_I2C_DESIGNWARE_PLATFORM=y > CONFIG_I2C_EXYNOS5=y > CONFIG_I2C_MV64XXX=y > +CONFIG_I2C_S3C2410=y > CONFIG_I2C_SIRF=y > CONFIG_I2C_TEGRA=y > CONFIG_I2C_ST=y -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
