GPIO2 re-mapped from 64-95 to 96-127

[Milton Lie]

I'm building custom images in yocto build environment, based on RobertCNelson kernel (release 4.4.14-ti-rt-r33).

Using following dts changes to re-configure GPIO2 pin

&am33xx_pinmux {

  /* gpio2 pins */

  gpio2_pins_default: pinmux_gpio2_pins_default {

    pinctrl-single,pins = <

      0x94 ( PIN_OUTPUT_PULLUP | MUX_MODE7 )   /* (T7) gpmc_oen_ren.gpio2[3]    SKY_ON-OFF     */

    >;

  };

};

&gpio2 {

  pinctrl-names = "default";

  pinctrl-0 = <&gpio2_pins_default>;

  status = "okay";

  sky_onoff {

    gpio-hog;

    gpios = <3 GPIO_ACTIVE_HIGH>;

    output-high;

    line-name = "sky_onoff";

  };

};

BEFORE my change, GPIO2 pins are mapped to 64-95 as I would expect:

root@beaglebone:~# more /sys/kernel/debug/gpio

GPIOs 0-31, platform/44e07000.gpio, gpio:

 gpio-6   (                    |cd                  ) in  hi IRQ

 gpio-26  (                    |wlan-en-regulator   ) out hi

GPIOs 32-63, platform/4804c000.gpio, gpio:

 gpio-53  (                    |?                   ) out lo

 gpio-54  (                    |?                   ) out lo

 gpio-55  (                    |?                   ) out lo

 gpio-56  (                    |?                   ) out lo

 gpio-60  (                    |sysfs               ) out hi

GPIOs 64-95, platform/481ac000.gpio, gpio:

GPIOs 96-127, platform/481ae000.gpio, gpio:

root@beaglebone:~#

AFTER my change, GPIO2 pins are mapped to 97-127:

root@beaglebone:~# more /sys/kernel/debug/gpio

GPIOs 0-31, platform/44e07000.gpio, gpio:

 gpio-6   (                    |cd                  ) in  hi IRQ

 gpio-26  (                    |wlan-en-regulator   ) out hi

GPIOs 32-63, platform/4804c000.gpio, gpio:

 gpio-53  (                    |?                   ) out lo

 gpio-54  (                    |?                   ) out lo

 gpio-55  (                    |?                   ) out lo

 gpio-56  (                    |?                   ) out lo

 gpio-60  (                    |sysfs               ) out hi

GPIOs 64-95, platform/481ae000.gpio, gpio:

GPIOs 96-127, platform/481ac000.gpio, gpio:

 gpio-99  (                    |sky_onoff           ) out hi

Notice GPIO3 (platform/481ae00) is now mapped to 64-95.

Anyone know why?

[William Hermans]

Are the GPIO banks now labled 1-4 now versus 0-3 before ? As far as the memory address change up . . . this is just the sort of inconsistency I've become accustomed to from TI.

I think the quick answer you'll receive if you complain about it is this: "If you do not like it, no one is forcing you to upgrade kernels . . ." Which is very true, but not exactly professional / consistent behavior.

Maybe someone left a comment in their git ?

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