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SubjectRe: [PATCH V2 2/2] dt-bindings: Document the Rockchip RK1608 bindings
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Hi Sakari,

Thanks for your advice,  i'll revise it.
> Hi Wen,
>
> On Mon, Feb 26, 2018 at 04:25:04PM +0800, Wen Nuan wrote:
>> From: Leo Wen <leo.wen@rock-chips.com>
>>
>> Add DT bindings documentation for Rockchip RK1608.
>>
>> Changes V2:
>> - Delete spi-min-frequency property.
>> - Add the external sensor's control pin and clock properties.
>> - Delete the '&pinctrl' node.
>>
>> Signed-off-by: Leo Wen <leo.wen@rock-chips.com>
>> ---
>> Documentation/devicetree/bindings/media/rk1608.txt | 97 ++++++++++++++++++++++
>> MAINTAINERS | 1 +
>> 2 files changed, 98 insertions(+)
>> create mode 100644 Documentation/devicetree/bindings/media/rk1608.txt
>>
>> diff --git a/Documentation/devicetree/bindings/media/rk1608.txt b/Documentation/devicetree/bindings/media/rk1608.txt
>> new file mode 100644
>> index 0000000..a9721a8
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/media/rk1608.txt
>> @@ -0,0 +1,97 @@
>> +Rockchip RK1608 as a PreISP to link on Soc
>> +------------------------------------------
>> +
>> +Required properties:
>> +
>> +- compatible : "rockchip,rk1608";
>> +- reg : SPI slave address of the rk1608;
>> +- clocks : Must contain an entry for each entry in clock-names;
>> +- clock-names : Must contain "mclk" for the device's master clock;
>> +- reset-gpio : GPIO connected to reset pin;
>> +- irq-gpio : GPIO connected to irq pin;
>> +- sleepst-gpio : GPIO connected to sleepst pin;
>> +- wakeup-gpio : GPIO connected to wakeup pin;
>> +- powerdown-gpio : GPIO connected to powerdown pin;
>> +- rockchip,powerdown0 : GPIO connected to the sensor0's powerdown pin;
>> +- rockchip,reset0 : GPIO connected to the sensor0's reset pin;
>> +- rockchip,powerdown1 : GPIO connected to the sensor1's powerdown pin;
>> +- rockchip,reset1 : GPIO connected to the sensor1's reset pin;
> Aren't these sensor's properties and not related to the ISP?
There not related to the ISP,  just connected to the external sensor0/1.
>
>> +- pinctrl-names : Should contain only one value - "default";
>> +- pinctrl-0 : Pin control group to be used for this controller;
>> +
>> +Optional properties:
>> +
>> +- spi-max-frequency : Maximum SPI clocking speed of the device;
>> +
>> +The device node should contain one 'port' child node with one child 'endpoint'
>> +node, according to the bindings defined in Documentation/devicetree/bindings/
>> +media/video-interfaces.txt. The following are properties specific to those
>> +nodes.
>> +
>> +endpoint node
>> +-------------
>> +
>> +- data-lanes : (optional) specifies MIPI CSI-2 data lanes as covered in
>> + video-interfaces.txt. If present it should be <1> - the device
>> + supports only one data lane without re-mapping.
>> +
>> +Note1: Since no data is generated in RK1608,so this is meaningful that you need
>> +a extra sensor (such as a camera) mounted on RK1608. You need to use endpoint@x
>> +to match these sensors.
>> +
>> +Note2:You must set the current value of the spi pins to be 8mA, if they are not.
>> +
>> +Example:
>> +&spi0 {
>> + status = "okay";
>> + spi_rk1608@00 {
>> + compatible = "rockchip,rk1608";
>> + status = "okay";
>> + reg = <0>;
>> + spi-max-frequency = <24000000>;
>> + link-freqs = /bits/ 64 <400000000>;
>> + clocks = <&cru SCLK_SPI0>, <&cru SCLK_VIP_OUT>,
>> + <&cru DCLK_VOP0>, <&cru ACLK_VIP>, <&cru HCLK_VIP>,
>> + <&cru PCLK_ISP_IN>, <&cru PCLK_ISP_IN>,
>> + <&cru PCLK_ISP_IN>, <&cru SCLK_MIPIDSI_24M>,
>> + <&cru PCLK_MIPI_CSI>;
>> + clock-names = "mclk", "mipi_clk", "pd_cif", "aclk_cif",
>> + "hclk_cif", "cif0_in", "g_pclkin_cif",
>> + "cif0_out", "clk_mipi_24m", "hclk_mipiphy";
>> + reset-gpio = <&gpio6 0 GPIO_ACTIVE_HIGH>;
>> + irq-gpio = <&gpio6 2 GPIO_ACTIVE_HIGH>;
>> + sleepst-gpio = <&gpio6 1 GPIO_ACTIVE_HIGH>;
>> + wakeup-gpio = <&gpio6 4 GPIO_ACTIVE_HIGH>;
>> + powerdown-gpio = <&gpio8 0 GPIO_ACTIVE_HIGH>;
>> +
>> + rockchip,powerdown1 = <&gpio5 9 GPIO_ACTIVE_HIGH>;
>> + rockchip,reset1 = <&gpio6 8 GPIO_ACTIVE_HIGH>;
>> +
>> + rockchip,powerdown0 = <&gpio5 8 GPIO_ACTIVE_HIGH>;
>> + rockchip,reset0 = <&gpio6 7 GPIO_ACTIVE_HIGH>;
>> +
>> + pinctrl-names = "default";
>> + pinctrl-0 = <&rk1608_irq_gpios &rk1608_wake_gpios
>> + &rk1608_sleep_gpios>;
>> +
>> + port@0 {
>> + mipi_dphy_out: endpoint {
>> + remote-endpoint = <&mipi_dphy_in>;
>> + clock-lanes = <0>;
>> + data-lanes = <1 2 3 4>;
>> + clock-noncontinuous;
>> + link-frequencies =
>> + /bits/ 64 <400000000>;
>> + };
>> + };
>> + /* Example: we have two cameras */
> What determines which one is active? The documentation above states there
> may only be a single endpoint per port. And a single port only, not two as
> you have here.
>
I'm  sorry , i wrote the wrongcommend.
There can be a lot of it on every port.
If you just want sensor0 to be active, delete the 'sensor_in1' node.
>> + port@1 {
>> + sensor_in0: endpoint@0 {
>> + remote-endpoint = <&sensor_out0>;
>> + };
>> + sensor_in1: endpoint@1 {
>> + remote-endpoint = <&sensor_out1>;
>> + };
>> + };
>> + };
>> +};
>> diff --git a/MAINTAINERS b/MAINTAINERS
>> index b2a98e3..04d227b 100644
>> --- a/MAINTAINERS
>> +++ b/MAINTAINERS
>> @@ -141,6 +141,7 @@ M: Leo Wen <leo.wen@rock-chips.com>
>> S: Maintained
>> F: drivers/media/spi/rk1608.c
>> F: drivers/media/spi/rk1608.h
>> +F: Documentation/devicetree/bindings/media/rk1608.txt
>>
>> 3C59X NETWORK DRIVER
>> M: Steffen Klassert <klassert@mathematik.tu-chemnitz.de>


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