lkml.org 
[lkml]   [2019]   [Mar]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: [PATCH v9 0/2] PWM support for HiFive Unleashed
On Tue, Mar 12, 2019 at 3:44 PM Andreas Schwab <schwab@suse.de> wrote:
>
> On Mär 12 2019, Yash Shah <yash.shah@sifive.com> wrote:
>
> > This patch series adds a PWM driver and DT documentation
> > for HiFive Unleashed board. The patches are mostly based on
> > Wesley's patch.
>
> Heartbeat trigger still doesn't work for me.

You need to make sure the period setting is passed via the
conventional way in DT file.
Example:
pwmleds {
compatible = "pwm-leds";
heartbeat {
pwms = <&L45 0 10000000 0>;
max-brightness = <255>;
linux,default-trigger = "heartbeat";
};
};

I have tested on HiFive unleashed board. To modify DT file I performed
the following steps:

Use the open-source FSBL from:
https://github.com/sifive/freedom-u540-c000-bootloader

Modify the fsbl/ux00_fsbl.dts file and re-build the fsbl.bin

Steps for using fsbl.bin in HiFive Unleashed board:
https://github.com/sifive/freedom-u540-c000-bootloader/issues/9

>
> Andreas.
>
> --
> Andreas Schwab, SUSE Labs, schwab@suse.de
> GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE 1748 E4D4 88E3 0EEA B9D7
> "And now for something completely different."

\
 
 \ /
  Last update: 2019-03-15 12:51    [W:0.096 / U:2.768 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site