On 08/29/2014 03:28 PM, Jean-Michel Hautbois wrote:
> This patch uses DT in order to parse addresses for dummy devices of adv7604.
> If nothing is defined, it uses default addresses.
> The main prupose is using two adv76xx on the same i2c bus.
>
> Signed-off-by: Jean-Michel Hautbois <[email protected]>
> ---
> .../devicetree/bindings/media/i2c/adv7604.txt | 7 ++-
> drivers/media/i2c/adv7604.c | 56
> ++++++++++++++--------
> 2 files changed, 42 insertions(+), 21 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/media/i2c/adv7604.txt
> b/Documentation/devicetree/bindings/media/i2c/adv7604.txt
> index c27cede..221b75c 100644
> --- a/Documentation/devicetree/bindings/media/i2c/adv7604.txt
> +++ b/Documentation/devicetree/bindings/media/i2c/adv7604.txt
> @@ -10,6 +10,7 @@ Required Properties:
>
> - compatible: Must contain one of the following
> - "adi,adv7611" for the ADV7611
> + - "adi,adv7604" for the ADV7604
>
> - reg: I2C slave address
>
> @@ -32,6 +33,8 @@ The digital output port node must contain at least one
> endpoint.
> Optional Properties:
>
> - reset-gpios: Reference to the GPIO connected to the device's reset pin.
> + - reg-names : Names of registers to be reprogrammed.
> + Refer to source code for possible values.
>
> Optional Endpoint Properties:
>
> @@ -50,7 +53,9 @@ Example:
>
> hdmi_receiver@4c {
> compatible = "adi,adv7611";
> - reg = <0x4c>;
> + /* edid page will be accessible @ 0x66 on i2c bus*/
> + reg = <0x4c 0x66>;
> + reg-names = "main", "edid";
>
> reset-gpios = <&ioexp 0 GPIO_ACTIVE_LOW>;
> hpd-gpios = <&ioexp 2 GPIO_ACTIVE_HIGH>;
> diff --git a/drivers/media/i2c/adv7604.c b/drivers/media/i2c/adv7604.c
> index d4fa213..4e660a2 100644
> --- a/drivers/media/i2c/adv7604.c
> +++ b/drivers/media/i2c/adv7604.c
> @@ -326,6 +326,22 @@ static const struct adv7604_video_standards
> adv7604_prim_mode_hdmi_gr[] = {
> { },
> };
>
> +static const char const *adv7604_secondary_names[] = {
> + "main", /* ADV7604_PAGE_IO */
> + "avlink", /* ADV7604_PAGE_AVLINK */
> + "cec", /* ADV7604_PAGE_CEC */
> + "infoframe", /* ADV7604_PAGE_INFOFRAME */
> + "esdp", /* ADV7604_PAGE_ESDP */
> + "dpp", /* ADV7604_PAGE_DPP */
> + "afe", /* ADV7604_PAGE_AFE */
> + "rep", /* ADV7604_PAGE_REP */
> + "edid", /* ADV7604_PAGE_EDID */
> + "hdmi", /* ADV7604_PAGE_HDMI */
> + "test", /* ADV7604_PAGE_TEST */
> + "cp", /* ADV7604_PAGE_CP */
> + "vdp" /* ADV7604_PAGE_VDP */
> +};
> +
> /* ----------------------------------------------------------------------- */
>
> static inline struct adv7604_state *to_state(struct v4l2_subdev *sd)
> @@ -2528,13 +2544,27 @@ static void adv7604_unregister_clients(struct
> adv7604_state *state)
> }
>
> static struct i2c_client *adv7604_dummy_client(struct v4l2_subdev *sd,
> - u8 addr, u8 io_reg)
> + unsigned int i)
> {
> struct i2c_client *client = v4l2_get_subdevdata(sd);
> + struct adv7604_platform_data *pdata = client->dev.platform_data;
> + unsigned int io_reg = 0xf2 + i;
> + struct i2c_client *new_client;
> +
> + /* Try to find it in DT */
> + new_client = i2c_new_secondary_device(client,
> + adv7604_secondary_names[i], io_read(sd, io_reg) >> 1);
Does this work if CONFIG_OF isn't set? I suspect not.
>
> - if (addr)
> - io_write(sd, io_reg, addr << 1);
> - return i2c_new_dummy(client->adapter, io_read(sd, io_reg) >> 1);
> + if (!new_client)
> + /* if not defined in DT, use default if available */
> + if (pdata && pdata->i2c_addresses[i])
> + new_client = i2c_new_dummy(client->adapter,
> + pdata->i2c_addresses[i]);
This is not the same as the original code. If pdata->i2c_addresses[i] == 0,
then it should use io_read(sd, io_reg) >> 1 as the address for i2c_new_dummy.
This would break existing code that uses platform_data (such as on our PCIe
board).
Regards,
Hans
> +
> + if (new_client)
> + io_write(sd, io_reg, new_client->addr << 1);
> +
> + return new_client;
> }
>
> static const struct adv7604_reg_seq adv7604_recommended_settings_afe[] = {
> @@ -2677,6 +2707,7 @@ MODULE_DEVICE_TABLE(i2c, adv7604_i2c_id);
>
> static struct of_device_id adv7604_of_id[] __maybe_unused = {
> { .compatible = "adi,adv7611", .data = &adv7604_chip_info[ADV7611] },
> + { .compatible = "adi,adv7604", .data = &adv7604_chip_info[ADV7604] },
> { }
> };
> MODULE_DEVICE_TABLE(of, adv7604_of_id);
> @@ -2717,20 +2748,6 @@ static int adv7604_parse_dt(struct adv7604_state
> *state)
> /* Disable the interrupt for now as no DT-based board uses it. */
> state->pdata.int1_config = ADV7604_INT1_CONFIG_DISABLED;
>
> - /* Use the default I2C addresses. */
> - state->pdata.i2c_addresses[ADV7604_PAGE_AVLINK] = 0x42;
> - state->pdata.i2c_addresses[ADV7604_PAGE_CEC] = 0x40;
> - state->pdata.i2c_addresses[ADV7604_PAGE_INFOFRAME] = 0x3e;
> - state->pdata.i2c_addresses[ADV7604_PAGE_ESDP] = 0x38;
> - state->pdata.i2c_addresses[ADV7604_PAGE_DPP] = 0x3c;
> - state->pdata.i2c_addresses[ADV7604_PAGE_AFE] = 0x26;
> - state->pdata.i2c_addresses[ADV7604_PAGE_REP] = 0x32;
> - state->pdata.i2c_addresses[ADV7604_PAGE_EDID] = 0x36;
> - state->pdata.i2c_addresses[ADV7604_PAGE_HDMI] = 0x34;
> - state->pdata.i2c_addresses[ADV7604_PAGE_TEST] = 0x30;
> - state->pdata.i2c_addresses[ADV7604_PAGE_CP] = 0x22;
> - state->pdata.i2c_addresses[ADV7604_PAGE_VDP] = 0x24;
> -
> /* Hardcode the remaining platform data fields. */
> state->pdata.disable_pwrdnb = 0;
> state->pdata.disable_cable_det_rst = 0;
> @@ -2891,8 +2908,7 @@ static int adv7604_probe(struct i2c_client *client,
> continue;
>
> state->i2c_clients[i] =
> - adv7604_dummy_client(sd, state->pdata.i2c_addresses[i],
> - 0xf2 + i);
> + adv7604_dummy_client(sd, i);
> if (state->i2c_clients[i] == NULL) {
> err = -ENOMEM;
> v4l2_err(sd, "failed to create i2c client %u\n", i);
>
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