• Joel Stanley's avatar
    i2c: aspeed: Deassert reset in probe · edd20e95
    Joel Stanley authored
    In order to use i2c from a cold boot, the i2c peripheral must be taken
    out of reset. We request a shared reset controller each time a bus
    driver is loaded, as the reset is shared between the 14 i2c buses.
    On remove the reset is asserted, which only touches the hardware once
    the last i2c bus is removed.
    The reset is required as the I2C buses will not work without releasing
    the reset. Previously the driver only worked with out of tree hacks
    that released this reset before the driver was loaded. Update the
    device tree bindings to reflect this.
    Signed-off-by: default avatarJoel Stanley <joel@jms.id.au>
    Acked-by: default avatarRob Herring <robh@kernel.org>
    Signed-off-by: default avatarWolfram Sang <wsa@the-dreams.de>
i2c-aspeed.txt 1.4 KB