Hi Laurent.
On 11/03/14 00:15, Laurent Pinchart wrote:
> Parse the device tree node to populate platform data.
>
> Cc: devicet...@vger.kernel.org
> Signed-off-by: Laurent Pinchart <laurent.pinch...@ideasonboard.com>
> ---
> .../devicetree/bindings/media/i2c/adv7604.txt | 56 +++++++++++++
> drivers/media/i2c/adv7604.c | 92
> ++++++++++++++++++----
> 2 files changed, 134 insertions(+), 14 deletions(-)
> create mode 100644 Documentation/devicetree/bindings/media/i2c/adv7604.txt
>
> diff --git a/Documentation/devicetree/bindings/media/i2c/adv7604.txt
> b/Documentation/devicetree/bindings/media/i2c/adv7604.txt
> new file mode 100644
> index 0000000..0845c50
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/media/i2c/adv7604.txt
> @@ -0,0 +1,56 @@
> +* Analog Devices ADV7604/11 video decoder with HDMI receiver
> +
> +The ADV7604 and ADV7611 are multiformat video decoders with an integrated
> HDMI
> +receiver. The ADV7604 has four multiplexed HDMI inputs and one analog input,
> +and the ADV7611 has one HDMI input and no analog input.
> +
> +Required Properties:
> +
> + - compatible: Must contain one of the following
> + - "adi,adv7604" for the ADV7604
> + - "adi,adv7611" for the ADV7611
> +
> + - reg: I2C slave address
> +
> + - hpd-gpios: References to the GPIOs that control the HDMI hot-plug
> + detection pins, one per HDMI input. The active flag indicates the GPIO
> + level that enables hot-plug detection.
> +
> +Optional Properties:
> +
> + - reset-gpios: Reference to the GPIO connected to the device's reset pin.
> +
> + - adi,default-input: Index of the input to be configured as default. Valid
> + values are 0..5 for the ADV7604 and 0 for the ADV7611.
I have some doubts about this property. Firstly, it seems it is not needed for
ADV7611 since it is always 0 for that device ?
Why can't we hard code in the driver some default input ?
And which inputs it refers to ? HDMI inputs A..D + analog ? If we keep this
property I think exact mapping of numbers to inputs should be included
in description of this property.
> + - adi,disable-power-down: Boolean property. When set forces the device to
> + ignore the power-down pin. The property is valid for the ADV7604 only as
> + the ADV7611 has no power-down pin.
Does it refer to the !PWRDWN pin ? If so I would replace "power-down" with
PWRDWN, so it is clear what we're talking about when someone looks only
at the datasheet.
> + - adi,disable-cable-reset: Boolean property. When set disables the HDMI
> + receiver automatic reset when the HDMI cable is unplugged.
Couldn't this be configured from user space with some default assumed
in the driver ?
> +Example:
> +
> + hdmi_receiver@4c {
> + compatible = "adi,adv7611";
> + reg = <0x4c>;
> +
> + reset-gpios = <&ioexp 0 GPIO_ACTIVE_LOW>;
> + hpd-gpios = <&ioexp 2 GPIO_ACTIVE_HIGH>;
> +
> + adi,default-input = <0>;
> +
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + port@0 {
> + reg = <0>;
> + };
> + port@1 {
> + reg = <1>;
> + hdmi_in: endpoint {
> + remote-endpoint = <&ccdc_in>;
> + };
> + };
> + };
> diff --git a/drivers/media/i2c/adv7604.c b/drivers/media/i2c/adv7604.c
> index cce140c..de44213 100644
> --- a/drivers/media/i2c/adv7604.c
> +++ b/drivers/media/i2c/adv7604.c
> @@ -2626,13 +2626,70 @@ static const struct adv7604_chip_info
> adv7604_chip_info[] = {
> },
> };
>
> +static struct i2c_device_id adv7604_i2c_id[] = {
> + { "adv7604", (kernel_ulong_t)&adv7604_chip_info[ADV7604] },
> + { "adv7611", (kernel_ulong_t)&adv7604_chip_info[ADV7611] },
> + { }
> +};
> +MODULE_DEVICE_TABLE(i2c, adv7604_i2c_id);
> +
> +static struct of_device_id adv7604_of_id[] = {
> + { .compatible = "adi,adv7604", .data = &adv7604_chip_info[ADV7604] },
> + { .compatible = "adi,adv7611", .data = &adv7604_chip_info[ADV7611] },
> + { }
> +};
> +MODULE_DEVICE_TABLE(of, adv7604_of_id);
> +
> +static int adv7604_parse_dt(struct adv7604_state *state)
> +{
> + struct device_node *np;
> + int ret;
> +
> + np = state->i2c_clients[ADV7604_PAGE_IO]->dev.of_node;
> +
> + state->pdata.disable_pwrdnb =
> + of_property_read_bool(np, "adi,disable-power-down");
> + state->pdata.disable_cable_det_rst =
> + of_property_read_bool(np, "adi,disable-cable-reset");
> +
> + ret = of_property_read_u32(np, "adi,default-input",
> + &state->pdata.default_input);
> + if (ret < 0)
> + state->pdata.default_input = -1;
> +
> + /* 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;
> +
> + /* HACK: Hardcode the remaining platform data fields. */
> + state->pdata.blank_data = 1;
> + state->pdata.op_656_range = 1;
> + state->pdata.alt_data_sat = 1;
> + state->pdata.insert_av_codes = 1;
> + state->pdata.op_format_mode_sel = ADV7604_OP_FORMAT_MODE0;
> +
> + return 0;
> +}
> +
> static int adv7604_probe(struct i2c_client *client,
> const struct i2c_device_id *id)
> {
> static const struct v4l2_dv_timings cea640x480 =
> V4L2_DV_BT_CEA_640X480P59_94;
> struct adv7604_state *state;
> - struct adv7604_platform_data *pdata = client->dev.platform_data;
> struct v4l2_ctrl_handler *hdl;
> struct v4l2_subdev *sd;
> unsigned int i;
> @@ -2651,19 +2708,32 @@ static int adv7604_probe(struct i2c_client *client,
> return -ENOMEM;
> }
>
> - state->info = &adv7604_chip_info[id->driver_data];
> state->i2c_clients[ADV7604_PAGE_IO] = client;
>
> /* initialize variables */
> state->restart_stdi_once = true;
> state->selected_input = ~0;
>
> - /* platform data */
> - if (!pdata) {
> + if (IS_ENABLED(CONFIG_OF) && client->dev.of_node) {
> + const struct of_device_id *oid;
> +
> + oid = of_match_node(adv7604_of_id, client->dev.of_node);
> + state->info = oid->data;
> +
> + err = adv7604_parse_dt(state);
> + if (err < 0) {
> + v4l_err(client, "DT parsing error\n");
> + return err;
> + }
> + } else if (client->dev.platform_data) {
> + struct adv7604_platform_data *pdata = client->dev.platform_data;
> +
> + state->info = (const struct adv7604_chip_info *)id->driver_data;
> + state->pdata = *pdata;
> + } else {
> v4l_err(client, "No platform data!\n");
> return -ENODEV;
> }
> - state->pdata = *pdata;
>
> /* Request GPIOs. */
> for (i = 0; i < state->info->num_dv_ports; ++i) {
> @@ -2762,7 +2832,7 @@ static int adv7604_probe(struct i2c_client *client,
> continue;
>
> state->i2c_clients[i] =
> - adv7604_dummy_client(sd, pdata->i2c_addresses[i],
> + adv7604_dummy_client(sd, state->pdata.i2c_addresses[i],
> 0xf2 + i);
> if (state->i2c_clients[i] == NULL) {
> err = -ENOMEM;
> @@ -2836,21 +2906,15 @@ static int adv7604_remove(struct i2c_client *client)
>
> /* ----------------------------------------------------------------------- */
>
> -static struct i2c_device_id adv7604_id[] = {
> - { "adv7604", ADV7604 },
> - { "adv7611", ADV7611 },
> - { }
> -};
> -MODULE_DEVICE_TABLE(i2c, adv7604_id);
> -
> static struct i2c_driver adv7604_driver = {
> .driver = {
> .owner = THIS_MODULE,
> .name = "adv7604",
> + .of_match_table = of_match_ptr(adv7604_of_id),
of_match_ptr() isn't necessary here.
> },
> .probe = adv7604_probe,
> .remove = adv7604_remove,
> - .id_table = adv7604_id,
> + .id_table = adv7604_i2c_id,
> };
>
> module_i2c_driver(adv7604_driver);
--
Regards,
Sylwester
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