#17062: LEDs mapped to wrong GPIOs on WRT54GL
------------------------+------------------------------------------
Reporter: anonymous | Owner: developers
Type: defect | Status: reopened
Priority: normal | Milestone: Chaos Calmer 15.05
Component: kernel | Version: Trunk
Resolution: | Keywords: wrt54g wrt54gl gpio led leds
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Comment (by pesco):
PS: Also of interest might be the mailing list thread that led to the
inclusion of the boardtype 0x0101 (WRT54GS) case in
https://dev.openwrt.org/browser/trunk/target/linux/brcm47xx/patches-3.10/145
-MIPS-BCM47XX-Fix-LEDs-on-WRT54GS-V1.0.patch?rev=41486 .
{{{
/* Verified on: WRT54GS V1.0 */
static const struct gpio_led
bcm47xx_leds_linksys_wrt54g_type_0101[] __initconst = {
BCM47XX_GPIO_LED(0, "green", "wlan", 0, LEDS_GPIO_DEFSTATE_OFF),
BCM47XX_GPIO_LED(1, "green", "power", 0, LEDS_GPIO_DEFSTATE_ON),
BCM47XX_GPIO_LED(7, "green", "dmz", 1, LEDS_GPIO_DEFSTATE_OFF),
};
}}}
Note that this matches the original (broadcom-diag) mapping except it is
missing the SES LED lines on GPIO 2 and 3. It seems these were left out
for fear of conflicting with some weird nvram settings of the person
reporting the bug in that case.
Quote (reporter):
> The ADM pins also might be wrong (despite definitions in the nvram
> that point to those pins). My switch gets detected but when I do
> "swconfig switch0 show" my system reboots.
> Note:
> [ 12.580000] gpio-keys gpio-keys.0: unable to claim gpio 6, err=-16
> [ 12.660000] gpio-keys: probe of gpio-keys.0 failed with error -16
> [ 12.900000] leds-gpio: probe of leds-gpio failed with error -16
Quote (developer):
> This is because `__gpiod_request` returned -EBUSY.
>
> Your nvram has following entries:
> gpio6=adm_rc
> gpio5=adm_eedi
> gpio3=adm_eesk
> gpio2=adm_eecs
>
> All of the above GPIOs are reserved by adm6996. It means registering
> LEDs failed (because GPIOs 2 and 3 were already in use) and
> registering buttons failed (because GPIO 6 was already in use).
https://lists.openwrt.org/pipermail/openwrt-devel/2014-June/025865.html
--
Ticket URL: <https://dev.openwrt.org/ticket/17062#comment:7>
OpenWrt <http://openwrt.org>
Opensource Wireless Router Technology
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