** Also affects: linux (Ubuntu Zesty)
Importance: Medium
Assignee: dann frazier (dannf)
Status: In Progress
** Changed in: linux (Ubuntu Zesty)
Status: In Progress => Fix Committed
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https://bugs.launchpad.net/bugs/1672504
Title:
pinctrl: qcom: add get_direction function
Status in linux package in Ubuntu:
Fix Committed
Status in linux source package in Zesty:
Fix Committed
Bug description:
On QDF2400 systems (ACPI-based), the kernel currently assumes all
GPIOs from the qcom/pinctrl driver are configured for input. However,
UEFI may have configured them for output. An upstream fix addresses
this by adding a get_direction function:
commit 8e51533780ba223a3562ff4382c6b6f350c7e9a4
Author: Timur Tabi <ti...@codeaurora.org>
Date: Fri Feb 10 17:21:00 2017 -0600
pinctrl: qcom: add get_direction function
The get_direction callback function allows gpiolib to know the current
direction (input vs output) for a given GPIO.
This is particularly useful on ACPI systems, where the GPIOs are
configured only by firmware (typically UEFI), so the only way to
know the initial values to query the hardware directly. Without
this function, gpiolib thinks that all GPIOs are configured for
input.
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