• Marek Szyprowski's avatar
    ARM: dts: exynos: Mark LDO10 as always-on on Peach Pit/Pi Chromebooks · 5b0eeeaa
    Marek Szyprowski authored
    Commit aff138bf ("ARM: dts: exynos: Add TMU nodes regulator supply
    for Peach boards") assigned LDO10 to Exynos Thermal Measurement Unit,
    but it turned out that it supplies also some other critical parts and
    board freezes/crashes when it is turned off.
    
    The mentioned commit made Exynos TMU a consumer of that regulator and in
    typical case Exynos TMU driver keeps it enabled from early boot. However
    there are such configurations (example is multi_v7_defconfig), in which
    some of the regulators are compiled as modules and are not available
    from early boot. In such case it may happen that LDO10 is turned off by
    regulator core, because it has no consumers yet (in this case consumer
    drivers cannot get it, because the supply regulators for it are not yet
    available). This in turn causes the board to crash. This patch restores
    'always-on' property for the LDO10 regulator.
    
    Fixes: aff138bf ("ARM: dts: exynos: Add TMU nodes regulator supply for Peach boards")
    Signed-off-by: default avatarMarek Szyprowski <m.szyprowski@samsung.com>
    Signed-off-by: default avatarKrzysztof Kozlowski <krzk@kernel.org>
    5b0eeeaa
exynos5420-peach-pit.dts 24.7 KB