On 02/03/13 23:46, Hauke Mehrtens wrote: > On 01/30/2013 01:39 PM, Piotr Haber wrote: >> On 01/19/13 18:18, Hauke Mehrtens wrote: >>> On 01/18/2013 03:33 PM, Piotr Haber wrote: >>>> Hi, >>>> >>>> I turned GPIO support in bcma (CONFIG_BCMA_DRIVER_GPIO) >>>> and get this in log: >>>> >>>> bcma: bus0: Found chip with id 0xA8D8, rev 0x01 and package 0x0A >>>> bcma: bus0: Core 0 found: ChipCommon (manuf 0x4BF, id 0x800, rev 0x22, class 0x0) >>>> bcma: bus0: Core 1 found: IEEE 802.11 (manuf 0x4BF, id 0x812, rev 0x17, class 0x0) >>>> bcma: bus0: Core 2 found: PCIe (manuf 0x4BF, id 0x820, rev 0x0F, class 0x0) >>>> bcma: bus0: Found rev 6 PMU (capabilities 0x108C2606) >>>> bcma: bus0: SPROM offset 0x830 >>>> bcma: bus0: PMU resource config unknown or not needed for device 0xA8D8 >>>> gpiochip_add: gpios -1..14 (bcma_gpio) failed to register >>>> bcma: bus0: Error registering GPIO driver: -28 >>>> bcma: bus0: Bus registered >>>> bcma: bus1: Found chip with id 0x4313, rev 0x01 and package 0x08 >>>> bcma: bus1: Core 0 found: ChipCommon (manuf 0x4BF, id 0x800, rev 0x24, class 0x0) >>>> bcma: bus1: Core 1 found: IEEE 802.11 (manuf 0x4BF, id 0x812, rev 0x18, class 0x0) >>>> bcma: bus1: Core 2 found: PCIe (manuf 0x4BF, id 0x820, rev 0x11, class 0x0) >>>> bcma: bus1: Found rev 8 PMU (capabilities 0x084C3008) >>>> bcma: bus1: SPROM offset 0x830 >>>> gpiochip_add: gpios -1..14 (bcma_gpio) failed to register >>>> bcma: bus1: Error registering GPIO driver: -28 >>>> bcma: bus1: Bus registered >>>> bcma: bus2: Found chip with id 0x4313, rev 0x01 and package 0x08 >>>> bcma: bus2: Core 0 found: ChipCommon (manuf 0x4BF, id 0x800, rev 0x24, class 0x0) >>>> bcma: bus2: Core 1 found: IEEE 802.11 (manuf 0x4BF, id 0x812, rev 0x18, class 0x0) >>>> bcma: bus2: Core 2 found: PCIe (manuf 0x4BF, id 0x820, rev 0x11, class 0x0) >>>> bcma: bus2: Found rev 8 PMU (capabilities 0x084C3008) >>>> bcma: bus2: SPROM offset 0x830 >>>> gpiochip_add: gpios -1..14 (bcma_gpio) failed to register >>>> bcma: bus2: Error registering GPIO driver: -28 >>>> bcma: bus2: Bus registered >>>> >>>> does that mean that gpio is not usable? >>> >>> At least it is not usable through the standard linux gpio interface. >>> >>>> what might be the problem? >>> >>> Is this -28 (ENOSPC) originally returned in gpiochip_find_base() in >>> drivers/gpio/gpiolib.c? >>> I have no idea what's going wrong here, could you provide me with your >>> kernel config and what kernel version are you using? >>> >>>> >>>> Kind regards >>>> Piotr >>>> >>> >>> >> ok, tried on 3.8-rc4 (config included) >> first loading of module is ok >> unloading and loading again results in same messages as before >> >> seems like gpiochip_find_base call in gpiochip_add fails >> not sure what's the reason thou > > Thanks for the logs. I missed unregistering of the gpio driver in bcma > and that would explain your problems. I am unable to unload bcma on my > SoCs so I haven't noticed that. > > Could your try this patch: > http://permalink.gmane.org/gmane.linux.kernel.wireless.general/103377 > > Hauke > that patch fixes a problem with loading/unloading thanks -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
