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SubjectRe: [PATCH 2/2] arm64: dts: allwinner: a64-amarula-relic: Add OV5640 camera node
Hi,

On Thu, Apr 18, 2019 at 02:08:13PM +0530, Jagan Teki wrote:
> Amarula A64-Relic board by default bound with OV5640 camera,
> so add support for it with below pin information.
>
> - PE13, PE12 via i2c-gpio bitbanging
> - CLK_CSI_MCLK as external clock
> - PE1 as external clock pin muxing
> - ALDO1 as AVDD supply
> - DLDO3 as DOVDD supply
> - ELDO3 as DVDD supply
> - PE14 gpio for reset pin
> - PE15 gpio for powerdown pin
>
> Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
> ---
>
> .../allwinner/sun50i-a64-amarula-relic.dts | 53 +++++++++++++++++++
> 1 file changed, 53 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64-amarula-relic.dts b/arch/arm64/boot/dts/allwinner/sun50i-a64-amarula-relic.dts
> index 3819ce396073..56c76b712e3b 100644
> --- a/arch/arm64/boot/dts/allwinner/sun50i-a64-amarula-relic.dts
> +++ b/arch/arm64/boot/dts/allwinner/sun50i-a64-amarula-relic.dts
> @@ -22,6 +22,41 @@
> stdout-path = "serial0:115200n8";
> };
>
> + i2c-csi {

That node should be named i2c

> + compatible = "i2c-gpio";
> + sda-gpios = <&pio 4 13 GPIO_ACTIVE_HIGH>; /* CSI-SDA: PE13 */
> + scl-gpios = <&pio 4 12 GPIO_ACTIVE_HIGH>; /* CSI-SCK: PE12 */

There's no need to document what those pins are here for, it's already
in the property name.

> + i2c-gpio,delay-us = <5>;
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + ov5640: camera@3c {
> + compatible = "ovti,ov5640";
> + reg = <0x3c>;
> + pinctrl-names = "default";
> + pinctrl-0 = <&csi_mclk_pin>;
> + clocks = <&ccu CLK_CSI_MCLK>;
> + clock-names = "xclk";
> +
> + AVDD-supply = <&reg_aldo1>;
> + DOVDD-supply = <&reg_dldo3>;
> + DVDD-supply = <&reg_eldo3>;
> + reset-gpios = <&pio 4 14 GPIO_ACTIVE_LOW>; /* CSI-RST-R: PE14 */
> + powerdown-gpios = <&pio 4 15 GPIO_ACTIVE_HIGH>; /* CSI-STBY-R: PE15 */
> +
> + port {
> + ov5640_ep: endpoint {
> + remote-endpoint = <&csi_ep>;
> + bus-width = <8>;
> + hsync-active = <1>; /* Active high */
> + vsync-active = <0>; /* Active low */
> + data-active = <1>; /* Active high */
> + pclk-sample = <1>; /* Rising */
> + };
> + };
> + };
> + };
> +
> wifi_pwrseq: wifi-pwrseq {
> compatible = "mmc-pwrseq-simple";
> clocks = <&rtc 1>;
> @@ -30,6 +65,24 @@
> };
> };
>
> +&csi {
> + status = "okay";
> +
> + port {
> + #address-cells = <1>;
> + #size-cells = <0>;

This isn't needed, you don't have a reg property in your child node.

Maxime

--
Maxime Ripard, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com
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