• Marek Szyprowski's avatar
    ARM: dts: exynos: Fix max voltage for buck8 regulator on Odroid XU3/XU4 · bb2c205c
    Marek Szyprowski authored
    commit a3238924 upstream.
    
    The maximum voltage value for buck8 regulator on Odroid XU3/XU4 boards is
    set too low. Increase it to the 2000mV as specified on the board schematic.
    So far the board worked fine, because of the bug in the PMIC driver, which
    used incorrect step value for that regulator. It interpreted the voltage
    value set by the bootloader as 1225mV and kept it unchanged. The regulator
    driver has been however fixed recently in the commit 56b5d4ea
    ("regulator: s2mps11: Fix steps for buck7, buck8 and LDO35"), what results
    in reading the proper buck8 value and forcing it to 1500mV on boot. This
    is not enough for proper board operation and results in eMMC errors during
    heavy IO traffic. Increasing maximum voltage value for buck8 restores
    original driver behavior and fixes eMMC issues.
    Signed-off-by: default avatarMarek Szyprowski <m.szyprowski@samsung.com>
    Fixes: 86a2d2ac ("ARM: dts: Add dts file for Odroid XU3 board")
    Fixes: 56b5d4ea ("regulator: s2mps11: Fix steps for buck7, buck8 and LDO35")
    Cc: <stable@vger.kernel.org>
    Signed-off-by: default avatarKrzysztof Kozlowski <krzk@kernel.org>
    Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
    Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
    bb2c205c
exynos5422-odroid-core.dtsi 8.46 KB