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    Subject[patch 3/5] xtensa: add mt9d131l demo head to s6105 platform
    Date
    The mt9d131 is behind a pca9543 which needs to be configured before
    we can find the sensor. Our s6_pca9543_callback is called directly
    from pca9543_probe, so we may not call i2c_new_device immediately.

    If Rodolfo Giometti's multiplexed i2c bus code and pca954x driver
    is accepted, most of this patch can be replaced by a simple
    i2c_register_board_info call.

    Signed-off-by: Daniel Glöckner <dg@emlix.com>
    ---
    arch/xtensa/platforms/s6105/device.c | 35 ++++++++++++++++++++++++++++++++++
    1 files changed, 35 insertions(+), 0 deletions(-)

    diff --git a/arch/xtensa/platforms/s6105/device.c b/arch/xtensa/platforms/s6105/device.c
    index 07fb329..ff047fc 100644
    --- a/arch/xtensa/platforms/s6105/device.c
    +++ b/arch/xtensa/platforms/s6105/device.c
    @@ -207,9 +207,33 @@ static struct s6dp_link s6dp_links[] = {
    .is_egress = 1,
    .minor = 2,
    },
    + {
    + .port_mask = 1 << 3,
    + .is_egress = 0,
    + .minor = 3,
    + },
    { }
    };

    +static void s6_attach_camera(struct work_struct *ws)
    +{
    + struct i2c_board_info mt9d131_bi = {
    + I2C_BOARD_INFO("mt9d131", S6I2C_ADDR_MT9D131),
    + .platform_data = &s6dp_links[1]
    + };
    + i2c_new_device(i2c_get_adapter(0), &mt9d131_bi);
    +}
    +
    +static DECLARE_WORK(s6_attach_camera_work, s6_attach_camera);
    +
    +static void s6_pca9543_callback(struct i2c_client *client,
    + int (set_switch)(struct i2c_client *, unsigned))
    +{
    + set_switch(client, 3);
    + /* i2c_attach_client does not look reentrant */
    + schedule_work(&s6_attach_camera_work);
    +}
    +
    static struct i2c_board_info __initdata s6_i2c_devices[] = {
    {
    I2C_BOARD_INFO("24c02", S6I2C_ADDR_AT24HC02B),
    @@ -221,6 +245,10 @@ static struct i2c_board_info __initdata s6_i2c_devices[] = {
    I2C_BOARD_INFO("saa7121", S6I2C_ADDR_SAA7121),
    .platform_data = &s6dp_links[0],
    },
    + {
    + I2C_BOARD_INFO("pca9543", S6I2C_ADDR_PCA9543),
    + .platform_data = &s6_pca9543_callback
    + },
    };

    static struct resource s6_isef_resource[] = {
    @@ -453,6 +481,13 @@ static int __init device_init(void)
    gpio_set_value(GPIO_BP_RESET, 1);
    }

    + /* reset MT9D131 */
    + if (!gpio_request(GPIO_IMAGER_RESET, "imager_reset")) {
    + gpio_direction_output(GPIO_IMAGER_RESET, 0);
    + udelay(1);
    + gpio_set_value(GPIO_IMAGER_RESET, 1);
    + }
    +
    i2c_register_board_info(S6_I2C_BUS_NUM, s6_i2c_devices,
    ARRAY_SIZE(s6_i2c_devices));
    spi_register_board_info(s6_spi_devices, ARRAY_SIZE(s6_spi_devices));
    --
    1.6.2.107.ge47ee
    --
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