Dynamically set AD5593R channel modes

Bug #1895612 reported by AceLan Kao
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
linux (Ubuntu)
Undecided
Unassigned
Focal
Medium
AceLan Kao

Bug Description

[Impact]
On Advantech UNO-420 development platform, we need a generic way to set the pin mode.
Upstream would like us to leverage ACPI override method to change the modes, but in Ubuntu core, we can't generate a new initramfs and boot up with the generated initramfs.

[Fix]
Add a module parameter to assign pin modes while loading ad5593r driver.

[Test]
Verified on Advantech UNO-420 platform.

[Regression Potential]
It checks the length of the passed parameter, and checks every bytes
in it to make sure it's a valid argument. There should be no index out
of range issue, and no wrong pin mode would be set.

AceLan Kao (acelankao)
Changed in linux (Ubuntu Focal):
assignee: nobody → AceLan Kao (acelankao)
Changed in linux (Ubuntu):
status: New → Invalid
Changed in linux (Ubuntu Focal):
status: New → In Progress
AceLan Kao (acelankao)
description: updated
AceLan Kao (acelankao)
description: updated
AceLan Kao (acelankao)
description: updated
Stefan Bader (smb)
Changed in linux (Ubuntu Focal):
importance: Undecided → Medium
AceLan Kao (acelankao)
description: updated
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