On Sun, Jan 03, 2021 at 05:10:10PM +0200, Andy Shevchenko wrote:

On Sun, Jan 3, 2021 at 4:17 AM Kent Gibson [off-list ref] wrote:

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On Sun, Jan 03, 2021 at 12:20:26AM +0200, Andy Shevchenko wrote:

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On Sat, Jan 2, 2021 at 4:32 AM Kent Gibson [off-list ref] wrote:

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+       local platform=`cat $SYSFS/kernel/debug/gpio | grep "$chip:" | tr -d ',' | awk '{print $5}'`

Besides useless use of cat (and tr + awk can be simplified) why are

What do you suggest for the tr/awk simplification?

You have `awk`, you can easily switch the entire pipeline to a little
awk scriptlet.

Baah, the number that I'm after is in the $SYSFS/kernel/debug/gpio that I
was pulling the platform from, so I can just pull it directly from there.

No need to go hunting through the file system for the base file - the
range of GPIOs assigned to the chip is right there.

In this example it is the 508:

# e.g. gpiochip0: GPIOs 508-511, parent: platform/gpio-mockup.0, gpio-mockup-A:

So I'll use that - unless it is unreliable for some reason?

Cheers,
Kent.