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

BTW.
i have CONFIG_BCMA_DEBUG enabled but don't see any additional info, is this flag used at all?

first load:
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_find_base: found new base at 240
gpiochip_add: registered GPIOs 240 to 255 on device: bcma_gpio
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_find_base: found new base at 224
gpiochip_add: registered GPIOs 224 to 239 on device: bcma_gpio
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_find_base: found new base at 208
gpiochip_add: registered GPIOs 208 to 223 on device: bcma_gpio
bcma: bus2: Bus registered

second load:
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