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    SubjectRe: [patch] video: fix SOC_CAMERA_MT9M001 build bug
    On Mon, 28 Apr 2008, Ingo Molnar wrote:

    > * Guennadi Liakhovetski <g.liakhovetski@gmx.de> wrote:
    >
    > > On Mon, 28 Apr 2008, Ingo Molnar wrote:
    > >
    > > >
    > > > on latest -git, with this config:
    > > >
    > > > http://redhat.com/~mingo/misc/config-Mon_Apr_28_13_25_34_CEST_2008.bad
    > > >
    > > > CONFIG_SOC_CAMERA_MT9M001=y
    > > > CONFIG_SOC_CAMERA_MT9V022=y
    > > > # CONFIG_I2C is not set
    > > >
    > > > the build fails:
    > > >
    > > > drivers/built-in.o: In function `reg_read':
    > > > mt9m001.c:(.text+0x140a87): undefined reference to `i2c_smbus_read_word_data'
    > > > drivers/built-in.o: In function `reg_write':
    > > > mt9m001.c:(.text+0x140b6e): undefined reference to `i2c_smbus_write_word_data'
    > > > drivers/built-in.o: In function `reg_read':
    > > > mt9v022.c:(.text+0x1413a7): undefined reference to `i2c_smbus_read_word_data'
    > > > drivers/built-in.o: In function `reg_write':
    > > > mt9v022.c:(.text+0x1414ce): undefined reference to `i2c_smbus_write_word_data'
    > > > drivers/built-in.o: In function `mt9m001_mod_init':
    > > > mt9m001.c:(.init.text+0x158a8): undefined reference to `i2c_register_driver'
    > > > drivers/built-in.o: In function `mt9v022_mod_init':
    > > > mt9v022.c:(.init.text+0x158b8): undefined reference to `i2c_register_driver'
    > > > drivers/built-in.o: In function `mt9m001_mod_exit':
    > > > mt9m001.c:(.exit.text+0x1656): undefined reference to `i2c_del_driver'
    > > > drivers/built-in.o: In function `mt9v022_mod_exit':
    > > > mt9v022.c:(.exit.text+0x1666): undefined reference to `i2c_del_driver'
    > > >
    > > > adding the missing I2C dependency fixes it.
    > > >
    > > > Signed-off-by: Ingo Molnar <mingo@elte.hu>
    > >
    > > NAK. SOC-CAMERA doesn't depend on I2C. It is also suitable for
    > > cameras, not using i2c. mt9m001 and mt9v022 do both depend on i2c.
    >
    > as you can see it from the build log above, the compiler disagrees with
    > you on whether the driver depends on I2C. I'm just the messenger :)

    Very sorry, but I don't see it. What I see above, is that mt9m001 and
    mt9v022 cannot be compiled - as I said, _they_ need i2c. And I don't see a
    single line for soc_camera.c. SOC_CAMERA is a generic API, it shouldn't
    have any hardware dependencies at all. Whereas mt9v022 and mt9m001 are 2
    specific i2c cameras.

    Thanks
    Guennadi
    ---
    Guennadi Liakhovetski


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