ar71xx: fix USB switch to mPCIE for Mikrotik rb91x boards

Some devices like the Mikrotik RB912 only have 1 USB port
which is shared between an USB A type port, and the mini PCIe socket.

Toggling a gpio selects the output to which USB is connected.

Since kernel 4.9, gpio base is rounded up to a value of 32.

Commit 65da6f9ca164 ("ar71xx: fix secondary gpio controller base values") accounts correctly for that.
In this commit, rb912 sees it's value changed from AR934X_GPIO_COUNT (23) to 32
This means that the USB toggle gpio number actually also changes from 52 to 61.

But ..
Some of these GPIO numbers are also used in other locations, like the boardfile.
The author forgot to also change them over there.

Switching the USB port to mPCIe now shows my modem is correctly discovered again:

[ 2863.864471] usb 1-1: new high-speed USB device number 4 using ehci-platform
[ 2864.055303] usb 1-1: config 1 has an invalid interface number: 8 but max is 3
[ 2864.062728] usb 1-1: config 1 has no interface number 1
[ 2864.074567] qcserial 1-1:1.0: Qualcomm USB modem converter detected
[ 2864.081474] usb 1-1: Qualcomm USB modem converter now attached to ttyUSB0
[ 2864.111960] qcserial 1-1:1.2: Qualcomm USB modem converter detected
[ 2864.118976] usb 1-1: Qualcomm USB modem converter now attached to ttyUSB1
[ 2864.139808] qcserial 1-1:1.3: Qualcomm USB modem converter detected
[ 2864.146777] usb 1-1: Qualcomm USB modem converter now attached to ttyUSB2
[ 2864.165276] qmi_wwan 1-1:1.8: cdc-wdm0: USB WDM device
[ 2864.171879] qmi_wwan 1-1:1.8 wwan0: register 'qmi_wwan' at usb-ehci-platform-1, WWAN/QMI device, 02:00:44:ed:3b:11

Fixes: 65da6f9ca164 ("ar71xx: fix secondary gpio controller base values")
Signed-off-by: Koen Vandeputte <koen.vandeputte@ncentric.com>
Cc: Robin Leblon <robin.leblon@ncentric.com>
Cc: Felix Fietkau <nbd@nbd.name>

diff --git a/target/linux/ar71xx/base-files/etc/board.d/03_gpio_switches b/target/linux/ar71xx/base-files/etc/board.d/03_gpio_switches
index 199a6ac08d79f3cf530c0af70e027a9389c87c1c..3bb2f635a3f6d5e005c86a93a2188cfc7cdb44d7 100755 (executable)
--- a/target/linux/ar71xx/base-files/etc/board.d/03_gpio_switches
+++ b/target/linux/ar71xx/base-files/etc/board.d/03_gpio_switches
@@ -24,7 +24,7 @@ nanostation-m-xw)
        ;;
 rb-912uag-2hpnd|\
 rb-912uag-5hpnd)
-       ucidef_add_gpio_switch "usb_power_switch" "USB Power Switch" "52" "1"
+       ucidef_add_gpio_switch "usb_power_switch" "USB Power Switch" "61" "1"
        ;;
 rb-750up-r2|\
 rb-951ui-2nd|\