On Sun, Jan 03, 2021 at 05:10:10PM +0200, Andy Shevchenko wrote:
On Sun, Jan 3, 2021 at 4:17 AM Kent Gibson warthog618@gmail.com wrote:
On Sun, Jan 03, 2021 at 12:20:26AM +0200, Andy Shevchenko wrote:
On Sat, Jan 2, 2021 at 4:32 AM Kent Gibson warthog618@gmail.com wrote:
[snip]
...
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.