This patch adds the gpio-ranges and gpio-reserved-ranges property
definitions to the binding text files supported by the pinctrl-msm
driver framework.
gpio-ranges:
For DT-based platforms the pinctrl-msm framework currently relies
on the deprecated-for-DT gpiochip_add_pin_range() function to add
the range of GPIOs to be handled by the pin controller. Due to
interactions within gpiolib code, this causes the pinctrl-msm
driver to bail out (-517) during boot when a gpio-hog is declared.
This can be fatal and cause the system to not boot or reset
(for a detailed explanation and call-trace, refer to patch:
"pinctrl: msm: fix gpio-hog related boot issues" in this series).
gpio-reserved-ranges:
The binding has been added as a precaution since the TrustZone
firmware (aka QSEE), which is running as the hypervisor, might
have reserved certain, but undisclosed pins. Hence reading or
writing to the registers for those pins will cause an
XPU violation and this subsequently crashes the kernel.
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
A misspelled 'arbitrary' propagated to quite a few locations in the DT
binding documentation for pin-controllers. Fixing by:
git grep abitrary | cut -f1 -d: | xargs sed -i 's/abitrary/arbitrary/'
Reported-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Soren Brinkmann <soren.brinkmann@xilinx.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Define a new binding for the Qualcomm TLMM (Top-Level Mode Mux) based pin
controller inside the APQ8084.
Acked-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
Signed-off-by: Georgi Djakov <gdjakov@mm-sol.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Christian Lamparter