hi,

I try to setup I2C on my dlink,
I try insmod i2c-gpio-custom bus0=0,4,5 but i've got an error -16, my gpio lines 4 and 5 are busy.

the gpio lines are driving the ppp led in red and green.

dmesg say on boot :
Registered led device: ppp
Registered led device: ppp-fail
I do not want those leds to be registered so my gpio lines will be free.

I use trunk repository and try to modify files to release these gpio lines, but with no success.
board : brcm63xx, firmware file : openwrt-DSL2640B-B2-squashfs-cfe.bin

Which file must i modify to leave these gpio lines free for my use ?

thanks in advance.

(Last edited by Flopsoft on 14 Feb 2013, 18:20)

gpio 4 and 5 were in fact not ppp related but internet on or off

So I edited the file : openwrt/trunk/build_dir/target-mips_uClibc-0.9.33.2/linux-brcm63xx/linux-3.7.7/arch/mips/bcm63xx/boards

in the section matching my board ( board_96348_D4PW ) I remove the led definition for gpio 4 and 5.

but no result, i've got i2c-gpio: probe of i2c-gpio.0 failed with error -16....
( and always messages in boot : Registered led device: ppp, Registered led device: ppp-fail )

Noone has got a clue for me ?

edit : I also edited the file config-3.8 in trunk/target/linux/brcm63xx to put a # before CONFIG_LEDS_GPIO=y

(Last edited by Flopsoft on 15 Feb 2013, 09:03)

opkg uninstall kmod-leds-gpio

thanks for your response,

your command does not work, i tried instead : opkg remove kmod-leds-gpio

reply : no packages removed

here is the list of my installed packages :

base-files - 43.32-r29592
busybox - 1.15.3-3.4
crda - 1.1.1-1
dnsmasq - 2.55-6.1
dropbear - 0.53.1-5
firewall - 2-34.8
gpioctl - 1.0-1
hotplug2 - 1.0-beta-3
iptables - 1.4.6-3.1
iptables-mod-conntrack - 1.4.6-3.1
iptables-mod-nat - 1.4.6-3.1
iw - 0.9.22-2
kernel - 2.6.32.27-1
kmod-b43 - 2.6.32.27+2011-11-15-1
kmod-cfg80211 - 2.6.32.27+2011-11-15-1
kmod-crc-ccitt - 2.6.32.27-1
kmod-crypto-aes - 2.6.32.27-1
kmod-crypto-arc4 - 2.6.32.27-1
kmod-crypto-core - 2.6.32.27-1
kmod-ipt-conntrack - 2.6.32.27-1
kmod-ipt-core - 2.6.32.27-1
kmod-ipt-nat - 2.6.32.27-1
kmod-ipt-nathelper - 2.6.32.27-1
kmod-mac80211 - 2.6.32.27+2011-11-15-1
kmod-ppp - 2.6.32.27-1
kmod-pppoe - 2.6.32.27-1
kmod-switch - 2.6.32.27-4
libc - 0.9.30.1-43.32
libgcc - 4.3.3+cs-43.32
libip4tc - 1.4.6-3.1
libiwinfo - 18
libiwinfo-lua - 18
liblua - 5.1.4-7
libnl-tiny - 0.1-1
libuci - 12012009.7-4
libuci-lua - 12012009.7-4
libxtables - 1.4.6-3.1
lua - 5.1.4-7
luci - 0.10.0-1
luci-app-firewall - 0.10.0-1
luci-i18n-english - 0.10.0-1
luci-lib-core - 0.10.0-1
luci-lib-ipkg - 0.10.0-1
luci-lib-lmo - 0.10.0-1
luci-lib-nixio - 0.10.0-1
luci-lib-sys - 0.10.0-1
luci-lib-web - 0.10.0-1
luci-mod-admin-core - 0.10.0-1
luci-mod-admin-full - 0.10.0-1
luci-proto-core - 0.10.0-1
luci-proto-ppp - 0.10.0-1
luci-sgi-cgi - 0.10.0-1
luci-theme-base - 0.10.0-1
luci-theme-openwrt - 0.10.0-1
mtd - 13
opkg - 576-2
ppp - 2.4.4-16.1
ppp-mod-pppoe - 2.4.4-16.1
uci - 12012009.7-4
udevtrigger - 106-1
uhttpd - 28
wireless-tools - 29-4
wpad-mini - 20111103-2

(Last edited by Flopsoft on 15 Feb 2013, 13:31)

Sorry I couldn't help.
I've wondered about the different build design of BCM vs. AR7 before. I can find stuff for AR71xx via dead code analysis, but BCM seems to have profiles and all sorts of stuff that makes it difficult to read (unless you go through a compile).

openwrt/trunk/build_dir/target-mips_uClibc-0.9.33.2/linux-brcm63xx/linux-3.7.7/arch/mips/bcm63xx/boards

Is this still the edited version after you compile? Or is it replaced by a make script?

the file remain edited after I compile.

can you share the edit? (Hopefully by me commenting, someone who knows sh*t will follow up)!

Thanks for making this topic upped

here is the part I edited :

static struct board_info __initdata board_96348_D4PW = {
    .name                = "D-4P-W",
    .expected_cpu_id        = 0x6348,

    .has_enet1            = 1,
    .has_pci            = 1,
    .has_uart0             = 1,

    .enet1 = {
        .has_phy        = 1,
        .phy_id            = 0,
        .force_speed_100    = 1,
        .force_duplex_full    = 1,
    },

    .leds = {
        {
            .name        = "D-4P-W:green:power",
            .gpio        = 0,
            .active_low    = 1,
        },
        {
            .name        = "D-4P-W::status",
            .gpio        = 3,
            .active_low    = 1,
        },
    },

    .buttons = {
        {
            .desc        = "reset",
            .gpio        = 7,
            .active_low    = 1,
            .type        = EV_KEY,
            .code        = KEY_RESTART,
            .debounce_interval = BCM963XX_KEYS_DEBOUNCE_INTERVAL,
        },
    },
};

I simply removed all concerning gpio 4 and gpio 5

I think led and gpio are defined elsewhere but I don't find where, If only someone could say me how to disable all led control, it would be enough. I don't care of led !

(Last edited by Flopsoft on 15 Feb 2013, 17:35)

I bricked this router last at night....

but I retried with a DSL-2542B with image for : openwrt-DSL2640B-B2-squashfs-cfe.bin
( I had modified option to remove all wifi related stuff and ppp support )

and it works.

I will try to unbrick the other router so as to try with all ppp packages uninstalled.

Flopsoft: are you posting in the right thread?
How is this relevant?

Don't know if this is the right thread !
The main question were to know which file modifying so I can use I2C. This is a question for developpers ?

My last post says that the problem can be related to wireless or ppp packages.