device tree bindings for lp5523 leds on N950?

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
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Hi Pavel,

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
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Hi,

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

@@ -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>;
               };
       };
};

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Hi!

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
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