• Tyler Baker's avatar
    ARM: multi_v7_defconfig: fix failure setting CPU voltage by enabling dependent I2C controller · 49e41938
    Tyler Baker authored
    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: default avatarTyler Baker <tyler.baker@linaro.org>
    Acked-by: default avatarKukjin Kim <kgene.kim@samsung.com>
    Signed-off-by: default avatarKevin Hilman <khilman@linaro.org>
    49e41938
multi_v7_defconfig 9.79 KB