Hi Uwe, [Adding Matt]
On Fri, Nov 30, 2018 at 6:53 PM Uwe Kleine-König <u.kleine-koe...@pengutronix.de> wrote: > > The status quo is: > - on i.MX25 the overcurrent polarity is always explicitly configured as > active high which matches the reset default. > - on i.MX6 and i.MX7 the overcurrent polarity is active high after > reset. usbmisc_imx6q_init() and usbmisc_imx7d_init() keep the current > state (probably as setup by the bootloader or still the reset > default) unless the polarity is explicitly configured as active high > which then is configured. (So if the pin is active low and the > bootloader didn't set this up the configuration is wrong.) > > To improve the situation always configure the reset default value unless > the device tree configures the polarity (and then use this one). > > Note that as the reset default is active high on all platforms there is > no need to check for the presence of "over-current-active-high". In the > absence of "over-current-active-low" it doesn't matter if active high is > configured because that's the default or because it is configured > explicitly. > > Signed-off-by: Uwe Kleine-König <u.kleine-koe...@pengutronix.de> It seems that Matt is also interested in adding the 'over-current-active-low' property: https://patchwork.kernel.org/patch/10701311/
