* device tree bindings for lp5523 leds on N950? @ 2017-08-14 13:38 Pavel Machek 2017-08-15 13:15 ` Sebastian Reichel 0 siblings, 1 reply; 4+ messages in thread From: Pavel Machek @ 2017-08-14 13:38 UTC (permalink / raw) To: linux-arm-kernel Hi! I'm (still) trying to debug "N950 not booting" situation. I'm stuck with black screen, so I thought it would be cool to use RGB led for debugging... Unfortunately, I don't see required dts bindings in the mainline. Does anyone have that working? Thanks, Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 181 bytes Desc: Digital signature URL: <http://lists.infradead.org/pipermail/linux-arm-kernel/attachments/20170814/a5fdea4d/attachment.sig> ^ permalink raw reply [flat|nested] 4+ messages in thread
* device tree bindings for lp5523 leds on N950? 2017-08-14 13:38 device tree bindings for lp5523 leds on N950? Pavel Machek @ 2017-08-15 13:15 ` Sebastian Reichel 2017-08-22 10:22 ` Sebastian Reichel 0 siblings, 1 reply; 4+ messages in thread From: Sebastian Reichel @ 2017-08-15 13:15 UTC (permalink / raw) To: linux-arm-kernel Hi Pavel, On Mon, Aug 14, 2017 at 03:38:16PM +0200, Pavel Machek wrote: > I'm (still) trying to debug "N950 not booting" situation. I'm stuck > with black screen, so I thought it would be cool to use RGB led for > debugging... > > Unfortunately, I don't see required dts bindings in the mainline. > > Does anyone have that working? I have some N950 DTS patches lying around, I think RGB led was one of them. I'm currently in Canda for a company event without my N950, but I should be able to send something tested before the weekend. -- Sebastian -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 833 bytes Desc: not available URL: <http://lists.infradead.org/pipermail/linux-arm-kernel/attachments/20170815/22c6d482/attachment.sig> ^ permalink raw reply [flat|nested] 4+ messages in thread
* device tree bindings for lp5523 leds on N950? 2017-08-15 13:15 ` Sebastian Reichel @ 2017-08-22 10:22 ` Sebastian Reichel 2017-11-03 21:28 ` Pavel Machek 0 siblings, 1 reply; 4+ messages in thread From: Sebastian Reichel @ 2017-08-22 10:22 UTC (permalink / raw) To: linux-arm-kernel Hi, On Tue, Aug 15, 2017 at 09:15:28AM -0400, Sebastian Reichel wrote: > Hi Pavel, > > On Mon, Aug 14, 2017 at 03:38:16PM +0200, Pavel Machek wrote: > > I'm (still) trying to debug "N950 not booting" situation. I'm stuck > > with black screen, so I thought it would be cool to use RGB led for > > debugging... > > > > Unfortunately, I don't see required dts bindings in the mainline. > > > > Does anyone have that working? > > I have some N950 DTS patches lying around, I think RGB led was one > of them. I'm currently in Canda for a company event without my N950, > but I should be able to send something tested before the weekend. Below is a DTS snippet for N950, that has been tested by me on top of 4.13-rc6. The left and right keyboard LEDs are also debug LEDs for cpu idle modes, so they will be lit without being enabled in lp5523. The status LED of N950 is not RGB, but just white. Also you need this to get the driver loading. Otherwise detection after reset fails even after quite increases waiting times. Looks like the lp5523 reset (which is not properly Ack'd by the device) breaks the omap-i2c state horribly. -- Sebastian --- a/drivers/leds/leds-lp55xx-common.c +++ b/drivers/leds/leds-lp55xx-common.c @@ -413,7 +413,7 @@ int lp55xx_init_device(struct lp55xx_chip *chip) usleep_range(1000, 2000); /* 500us abs min. */ } - lp55xx_reset_device(chip); + //lp55xx_reset_device(chip); // FIXME: breaks omap-i2c /* * Exact value is not available. 10 - 20ms ---------- &i2c2 { rgb-led at 32 { compatible = "national,lp5523"; reg = <0x32>; enable-gpio = <&gpio2 9 GPIO_ACTIVE_HIGH>; /* 41 */ clock-mode = /bits/ 8 <2>; /* external */ chan0 { chan-name = "lp5523:kb5"; /* Keyboard ooooox */ led-cur = /bits/ 8 <50>; max-cur = /bits/ 8 <130>; }; chan1 { chan-name = "lp5523:kb4"; /* Keyboard ooooxo */ led-cur = /bits/ 8 <50>; max-cur = /bits/ 8 <130>; }; chan2 { chan-name = "lp5523:kb3"; /* Keyboard oooxoo */ led-cur = /bits/ 8 <50>; max-cur = /bits/ 8 <130>; }; chan3 { chan-name = "lp5523:kb2"; /* Keyboard ooxooo */ led-cur = /bits/ 8 <50>; max-cur = /bits/ 8 <130>; }; chan4 { chan-name = "lp5523:kb1"; /* Keyboard oxoooo */ led-cur = /bits/ 8 <50>; max-cur = /bits/ 8 <130>; }; chan5 { chan-name = "lp5523:kb0"; /* Keyboard xooooo */ led-cur = /bits/ 8 <50>; max-cur = /bits/ 8 <130>; }; chan6 { led-cur = /bits/ 8 <0>; max-cur = /bits/ 8 <0>; }; chan7 { led-cur = /bits/ 8 <0>; max-cur = /bits/ 8 <0>; }; chan8 { chan-name = "lp5523:status-led"; led-cur = /bits/ 8 <50>; max-cur = /bits/ 8 <130>; }; }; }; -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 833 bytes Desc: not available URL: <http://lists.infradead.org/pipermail/linux-arm-kernel/attachments/20170822/85d089d8/attachment.sig> ^ permalink raw reply [flat|nested] 4+ messages in thread
* device tree bindings for lp5523 leds on N950? 2017-08-22 10:22 ` Sebastian Reichel @ 2017-11-03 21:28 ` Pavel Machek 0 siblings, 0 replies; 4+ messages in thread From: Pavel Machek @ 2017-11-03 21:28 UTC (permalink / raw) To: linux-arm-kernel Hi! > On Tue, Aug 15, 2017 at 09:15:28AM -0400, Sebastian Reichel wrote: > > Hi Pavel, > > > > On Mon, Aug 14, 2017 at 03:38:16PM +0200, Pavel Machek wrote: > > > I'm (still) trying to debug "N950 not booting" situation. I'm stuck > > > with black screen, so I thought it would be cool to use RGB led for > > > debugging... > > > > > > Unfortunately, I don't see required dts bindings in the mainline. > > > > > > Does anyone have that working? > > > > I have some N950 DTS patches lying around, I think RGB led was one > > of them. I'm currently in Canda for a company event without my N950, > > but I should be able to send something tested before the weekend. > > Below is a DTS snippet for N950, that has been tested by me > on top of 4.13-rc6. The left and right keyboard LEDs are > also debug LEDs for cpu idle modes, so they will be lit > without being enabled in lp5523. The status LED of N950 is > not RGB, but just white. Also you need this to get the driver > loading. Otherwise detection after reset fails even after > quite increases waiting times. Looks like the lp5523 reset > (which is not properly Ack'd by the device) breaks the omap-i2c > state horribly. Thanks a lot, LED now works. It took me a while, but I now have n950 usable with nfsroot. (For a while, anyway.) N9 is usable too. Hardware is similar enough than it could be possible to debug without serial cable. Best regards, Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 181 bytes Desc: Digital signature URL: <http://lists.infradead.org/pipermail/linux-arm-kernel/attachments/20171103/76e0020c/attachment.sig> ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2017-11-03 21:28 UTC | newest] Thread overview: 4+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2017-08-14 13:38 device tree bindings for lp5523 leds on N950? Pavel Machek 2017-08-15 13:15 ` Sebastian Reichel 2017-08-22 10:22 ` Sebastian Reichel 2017-11-03 21:28 ` Pavel Machek
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