lkml.org 
[lkml]   [2021]   [Dec]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Subject[PATCH v1 pinctrl-next 0/1] add blink and activity functions to SGPIO
Date
Expose a debugfs / devicetree interface for Microsemi SGPIO controllers.
By writing values of 2-5, the SGPIO pins can be configured for either
automatic blinking or activity.

The implementation is modeled after the code in
/drivers/pinctrl/pinctrl-ocelot.c.

I have only tested this with currently out-of-tree patches for the
VSC7512 that I hope to get in soon. They are not needed for VSC7513 /
VSC7514, SPARX5, or LUTON - but I don't have any hardware to test.

Of note: the 7512 chip has a discrepancy between the datasheet and the
registers. The datahseet claims 20Hz blink default frequency, the
registers claim 5 Hz default frequency for BMODE_0. I override the
OCELOT registers to correct for this. I don't know if that is needed for
LUTON or SPARX, but having two blink modes at the same frequency isn't
beneficial. As such, I make the blink modes match the 5Hz / 20Hz for the
two modes.

Tested with VSC7512 by way of:
echo SGPIO_O_p1b0 {blink0,blink1,activity0,activity1} >
/sys/kernel/debug/pinctrl/pinctrl-sgpio-pinctrl-sgpio-output/pinmux-select

LEDs blink!


Colin Foster (1):
pinctrl: microchip-sgpio: add activity and blink functionality

drivers/pinctrl/pinctrl-microchip-sgpio.c | 135 +++++++++++++++++++++-
1 file changed, 130 insertions(+), 5 deletions(-)

--
2.25.1

\
 
 \ /
  Last update: 2021-12-29 01:38    [W:0.037 / U:0.956 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site