On Fri, May 27, 2016 at 8:35 AM, Kishon Vijay Abraham I <kishon@xxxxxx> wrote: > The reset values for all the PCF lines are high and hence on > shutdown we should drive all the lines high in order to > bring it to the reset state. > > This is actually required since PCF doesn't have a reset > line and even after warm reset (by invoking "reboot" in > prompt) the PCF lines maintains it's previous programmed > state. This becomes a problem if the boards are designed to > work with the default initial state. > > DRA7XX_evm uses PCF8575 and one of the PCF output lines > feeds to MMC/SD VDD and this line should be driven high in order > for the MMC/SD to be detected. This line is modelled as > regulator and the hsmmc driver takes care of enabling and > disabling it. In the case of 'reboot', during shutdown path > as part of it's cleanup process the hsmmc driver disables > this regulator. This makes MMC *boot* not functional. > > Fix it by driving all the pcf lines high. > > Signed-off-by: Kishon Vijay Abraham I <kishon@xxxxxx> > Signed-off-by: Sekhar Nori <nsekhar@xxxxxx> Patch applied. Yours, Linus Walleij -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
