#linux-rockchip on 2020-03-30 — irc logs at freenode.irclog.whitequark.org

2017-05-08 04:47 ChanServ changed the topic of #linux-rockchip to: Rockchip development discussion | IRC log http://irclog.whitequark.org/linux-rockchip | Community GH https://github.com/linux-rockchip | Rockchip GH https://github.com/rockchip-linux | ML https://groups.google.com/group/linux-rockchip

00:05 stikonas has quit [Read error: Connection reset by peer]

00:05 stikonas has joined #linux-rockchip

00:06 field^Zzz2 has quit [Ping timeout: 258 seconds]

00:40 kevery has joined #linux-rockchip

00:43 stikonas_ has joined #linux-rockchip

00:44 stikonas has quit [Read error: Connection reset by peer]

00:44 kevery has quit [Ping timeout: 256 seconds]

00:47 stikonas_ has quit [Remote host closed the connection]

00:57 kevery has joined #linux-rockchip

01:16 return0e_ has joined #linux-rockchip

01:17 return0e has quit [Ping timeout: 256 seconds]

01:26 vstehle has quit [Ping timeout: 265 seconds]

02:09 tuxd3v__ has joined #linux-rockchip

02:11 tuxd3v_ has quit [Ping timeout: 252 seconds]

02:28 tuxd3v__ has quit [Quit: Leaving]

02:35 tuxd3v has joined #linux-rockchip

03:00 kevery1 has joined #linux-rockchip

03:01 kevery has quit [Ping timeout: 252 seconds]

03:01 kevery1 is now known as kevery

03:35 <wens> that is a regulator part number

03:41 adjtm has quit [Remote host closed the connection]

03:42 adjtm has joined #linux-rockchip

03:44 JohnDoe_71Rus has joined #linux-rockchip

04:07 adjtm has quit [Remote host closed the connection]

04:08 adjtm has joined #linux-rockchip

04:12 <tuxd3v> wens, thanks, does this have anything to do with pwm support for a fan( active cooling )?

04:14 <wens> no. it is a 5A, 2.4 MHz, Digitally Programmable TinyBuck®Regulator

04:14 <wens> "FAN" just happens to be part of the part number

04:21 vagrantc has quit [Quit: leaving]

04:50 return0e_ has quit [Remote host closed the connection]

04:51 return0e_ has joined #linux-rockchip

04:52 ldevulder_ has quit [Ping timeout: 240 seconds]

04:53 tuxd3v_ has joined #linux-rockchip

04:53 tuxd3v has quit [Remote host closed the connection]

04:54 chiastre has quit [Write error: Broken pipe]

04:55 return0e_ has quit [Ping timeout: 246 seconds]

04:56 chiastre has joined #linux-rockchip

05:00 vstehle has joined #linux-rockchip

05:03 return0e has joined #linux-rockchip

05:11 return0e has quit [Remote host closed the connection]

05:13 return0e has joined #linux-rockchip

05:13 return0e has quit [Read error: Connection reset by peer]

05:21 <tuxd3v_> wens, thanks, I was looking for a pwm driver to drive a fan on my rockpi4 :)

06:06 <wens> pwm_fan under hwmon

06:38 kevery1 has joined #linux-rockchip

06:40 kevery has quit [Ping timeout: 256 seconds]

06:40 kevery1 is now known as kevery

06:55 afaerber has quit [Remote host closed the connection]

06:58 afaerber has joined #linux-rockchip

06:59 kaspter has quit [Ping timeout: 240 seconds]

07:00 chewitt has quit [Quit: Adios!]

07:14 ldevulder_ has joined #linux-rockchip

07:16 ldevulder_ has quit [Client Quit]

07:25 kaspter has joined #linux-rockchip

07:33 adjtm has quit [Remote host closed the connection]

07:34 camus1 has joined #linux-rockchip

07:34 kaspter has quit [Ping timeout: 260 seconds]

07:34 camus1 is now known as kaspter

07:34 adjtm has joined #linux-rockchip

07:34 vicencb has joined #linux-rockchip

07:40 adjtm has quit [Remote host closed the connection]

07:40 adjtm has joined #linux-rockchip

07:50 ldevulder has joined #linux-rockchip

07:58 adjtm has quit [Remote host closed the connection]

07:59 adjtm has joined #linux-rockchip

08:00 adjtm has quit [Remote host closed the connection]

08:01 adjtm has joined #linux-rockchip

08:12 phillid is now known as uh

08:21 return0e has joined #linux-rockchip

08:57 stikonas has joined #linux-rockchip

08:59 field^Zzz2 has joined #linux-rockchip

10:25 kevery has quit [Ping timeout: 256 seconds]

10:38 lkcl has quit [Ping timeout: 264 seconds]

11:00 vicencb has quit [Quit: Leaving.]

11:01 jelly-home is now known as jelly

11:07 lkcl has joined #linux-rockchip

11:13 <robmur01_> tuxd3v_: simply enabling the appropriate PWM channel in the DTS should be enough to manually control it from userspace (via /sys/class/pwm/)

11:13 <robmur01_> if you want to get fancy, see the RockPro64 or NanoPC-T4 DTSs for examples of full-blown pwm-fan and thermal integration

11:26 repk has quit [Quit: WeeChat 2.7.1]

11:27 repk has joined #linux-rockchip

11:39 Kelsar has joined #linux-rockchip

11:40 mps has quit [Ping timeout: 268 seconds]

11:46 mps has joined #linux-rockchip

12:35 kevery has joined #linux-rockchip

13:19 _whitelogger has joined #linux-rockchip

13:21 thefloweringash has joined #linux-rockchip

13:24 JohnDoe_71Rus has quit [Ping timeout: 246 seconds]

14:14 vicencb has joined #linux-rockchip

15:06 kevery has quit [Ping timeout: 250 seconds]

15:08 maz has quit [Quit: ZNC 1.7.2+deb3 - https://znc.in]

15:09 jlanda has quit [Read error: Connection reset by peer]

15:10 urjaman has quit [Ping timeout: 260 seconds]

15:10 phh has quit [Ping timeout: 265 seconds]

15:10 jlanda has joined #linux-rockchip

15:11 urjaman has joined #linux-rockchip

15:12 omegamoon[m] has quit [Ping timeout: 240 seconds]

15:13 return0e has quit [Remote host closed the connection]

15:14 phh has joined #linux-rockchip

15:36 jlanda has quit [Ping timeout: 256 seconds]

15:38 jlanda has joined #linux-rockchip

15:38 Jin^eLD has quit [Ping timeout: 256 seconds]

15:43 maz has joined #linux-rockchip

15:45 Guest87911 has quit [*.net *.split]

15:45 ojn has quit [*.net *.split]

15:45 sphalerite has quit [*.net *.split]

15:45 qa5 has quit [*.net *.split]

15:45 ojn has joined #linux-rockchip

15:45 qa5 has joined #linux-rockchip

15:45 Guest87911 has joined #linux-rockchip

15:45 sphalerite has joined #linux-rockchip

15:46 Guest87911 has quit [Max SendQ exceeded]

15:47 Guest87911 has joined #linux-rockchip

15:49 thefloweringash has quit [Ping timeout: 256 seconds]

15:49 psydruid has quit [Ping timeout: 260 seconds]

16:00 levd_ has quit [Quit: Goodbye!]

16:14 Guest87911 has quit [Read error: Connection reset by peer]

16:15 Guest87911 has joined #linux-rockchip

16:33 <tuxd3v_> we have /sys/class/pwm/pwmchip0, but I don't know how to assign it to a GPIO, so that I can use a hardware driver to control a fan..

16:33 <robmur01_> ??

16:34 <robmur01_> you don't. It's not a GPIO, it's a PWM

16:34 <tuxd3v_> yeah, but I would like to direct the output of it to a GPIO pin

16:35 <tuxd3v_> assign a pin to it, then I could use a hardware pwm driver like this:

16:35 <robmur01_> my point is you can't. PWM0 outputs on the PWM0 pin

16:35 <robmur01_> RK SoCs aren't like microcontrollers with super-flexible pinmux matrices

16:36 <tuxd3v_> https://github.com/tuxd3v/pwm_driver

16:39 <robmur01_> From the Rock Pi 4 wiki, looks like you have a choice of PWM0 on pin 11 and PWM1 on pin 13

16:42 <tuxd3v_> yeah I was looking at it, it seems nice

16:42 <tuxd3v_> that way I can drive a fan externally :)

16:43 sphalerite has quit [Ping timeout: 240 seconds]

16:45 <tuxd3v_> now the problem is, how to I set pwm frequency and duty cicly :S

16:46 <robmur01_> https://www.kernel.org/doc/html/latest/driver-api/pwm.html?highlight=pwm#using-pwms-with-the-sysfs-interface

16:46 psydruid has joined #linux-rockchip

16:49 <robmur01_> beware that unless you've explicitly enabled PWM0 and/or PWM1 via DTS patch/overlay/u-boot script/etc., that "pwmchip0" is probably PWM2, which shouldn't let you export anything because it's busy driving a regulator

16:50 vagrantc has joined #linux-rockchip

17:25 thefloweringash has joined #linux-rockchip

17:40 <tuxd3v_> robmur01_, thanks, I will try via dts, to see if I am able to enable it :)

17:48 drrty has quit [Ping timeout: 250 seconds]

18:26 repk has quit [Quit: WeeChat 2.7.1]

18:29 repk has joined #linux-rockchip

19:17 return0e has joined #linux-rockchip

20:18 vicencb has quit [Quit: Leaving.]

20:22 vicencb has joined #linux-rockchip

20:23 vicencb has quit [Remote host closed the connection]

21:16 vicencb has joined #linux-rockchip

21:40 adjtm_ has joined #linux-rockchip

21:43 adjtm has quit [Ping timeout: 250 seconds]

21:56 vicencb has quit [Quit: Leaving.]

22:11 whoman321 has joined #linux-rockchip

23:43 field^Zzz2 has quit [Ping timeout: 246 seconds]