Date:   Tue, 27 Nov 2018 12:26:09 +0530
From:   Jagan Teki <jagan@...rulasolutions.com>
To:     Maxime Ripard <maxime.ripard@...tlin.com>
Cc:     Hans Verkuil <hans.verkuil@...co.com>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        laurent.pinchart@...asonboard.com,
        linux-media <linux-media@...r.kernel.org>, a.hajda@...sung.com,
        Chen-Yu Tsai <wens@...e.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        devicetree <devicetree@...r.kernel.org>,
        Mark Rutland <mark.rutland@....com>,
        Rob Herring <robh+dt@...nel.org>, frowand.list@...il.com
Subject: Re: [PATCH 5/5] DO NOT MERGE: ARM: dts: bananapi: Add Camera support

On Tue, Nov 13, 2018 at 1:54 PM Maxime Ripard <maxime.ripard@...tlin.com> wrote:
>
> Signed-off-by: Maxime Ripard <maxime.ripard@...tlin.com>
> ---
>  arch/arm/boot/dts/sun7i-a20-bananapi.dts | 98 +++++++++++++++++++++++++-
>  1 file changed, 98 insertions(+)
>
> diff --git a/arch/arm/boot/dts/sun7i-a20-bananapi.dts b/arch/arm/boot/dts/sun7i-a20-bananapi.dts
> index 70dfc4ac0bb5..18dbff9f1ce9 100644
> --- a/arch/arm/boot/dts/sun7i-a20-bananapi.dts
> +++ b/arch/arm/boot/dts/sun7i-a20-bananapi.dts
> @@ -54,6 +54,9 @@
>         compatible = "lemaker,bananapi", "allwinner,sun7i-a20";
>
>         aliases {
> +               i2c0 = &i2c0;
> +               i2c1 = &i2c1;
> +               i2c2 = &i2c2;
>                 serial0 = &uart0;
>                 serial1 = &uart3;
>                 serial2 = &uart7;
> @@ -63,6 +66,41 @@
>                 stdout-path = "serial0:115200n8";
>         };
>
> +       reg_cam: cam {
> +               compatible = "regulator-fixed";
> +               regulator-name = "cam";
> +               regulator-min-microvolt = <5000000>;
> +               regulator-max-microvolt = <5000000>;
> +               vin-supply = <&reg_vcc5v0>;
> +               gpio = <&pio 7 16 GPIO_ACTIVE_HIGH>;
> +               enable-active-high;
> +               regulator-always-on;
> +       };
> +
> +        reg_cam_avdd: cam-avdd {
> +                compatible = "regulator-fixed";
> +                regulator-name = "cam500b-avdd";
> +                regulator-min-microvolt = <2800000>;
> +                regulator-max-microvolt = <2800000>;
> +                vin-supply = <&reg_cam>;
> +        };
> +
> +        reg_cam_dovdd: cam-dovdd {
> +                compatible = "regulator-fixed";
> +                regulator-name = "cam500b-dovdd";
> +                regulator-min-microvolt = <1800000>;
> +                regulator-max-microvolt = <1800000>;
> +                vin-supply = <&reg_cam>;
> +        };
> +
> +        reg_cam_dvdd: cam-dvdd {
> +                compatible = "regulator-fixed";
> +                regulator-name = "cam500b-dvdd";
> +                regulator-min-microvolt = <1500000>;
> +                regulator-max-microvolt = <1500000>;
> +                vin-supply = <&reg_cam>;
> +        };
> +
>         hdmi-connector {
>                 compatible = "hdmi-connector";
>                 type = "a";
> @@ -120,6 +158,27 @@
>                 >;
>  };
>
> +&csi0 {
> +       pinctrl-names = "default";
> +       pinctrl-0 = <&csi0_pins_a>;
> +       status = "okay";
> +
> +       port {
> +               #address-cells = <1>;
> +               #size-cells = <0>;
> +
> +               csi_from_ov5640: endpoint {
> +                        remote-endpoint = <&ov5640_to_csi>;
> +                        bus-width = <8>;
> +                        data-shift = <2>;
> +                        hsync-active = <1>; /* Active high */
> +                        vsync-active = <0>; /* Active low */
> +                        data-active = <1>;  /* Active high */
> +                        pclk-sample = <1>;  /* Rising */
> +                };
> +       };
> +};
> +
>  &de {
>         status = "okay";
>  };
> @@ -167,6 +226,39 @@
>         };
>  };
>
> +&i2c1 {
> +       pinctrl-names = "default";
> +       pinctrl-0 = <&i2c1_pins_a>;
> +       status = "okay";
> +
> +       camera: camera@21 {
> +               compatible = "ovti,ov5640";
> +               reg = <0x21>;
> +                clocks = <&ccu CLK_CSI0>;
> +                clock-names = "xclk";
> +               assigned-clocks = <&ccu CLK_CSI0>;
> +               assigned-clock-rates = <24000000>;
> +
> +                reset-gpios = <&pio 7 14 GPIO_ACTIVE_LOW>;
> +                powerdown-gpios = <&pio 7 19 GPIO_ACTIVE_HIGH>;
> +                AVDD-supply = <&reg_cam_avdd>;
> +                DOVDD-supply = <&reg_cam_dovdd>;
> +                DVDD-supply = <&reg_cam_dvdd>;
> +
> +                port {
> +                        ov5640_to_csi: endpoint {
> +                                remote-endpoint = <&csi_from_ov5640>;
> +                                bus-width = <8>;
> +                                data-shift = <2>;
> +                                hsync-active = <1>; /* Active high */
> +                                vsync-active = <0>; /* Active low */
> +                                data-active = <1>;  /* Active high */
> +                                pclk-sample = <1>;  /* Rising */
> +                        };
> +                };
> +       };

Does ov5640 need any further patches, wrt linux-next? I'm trying to
test this on top of linux-next but the slave id seems not detecting.

[    2.304711] ov5640 1-0021: Linked as a consumer to regulator.5
[    2.310639] ov5640 1-0021: Linked as a consumer to regulator.6
[    2.316592] ov5640 1-0021: Linked as a consumer to regulator.4
[    2.351540] ov5640 1-0021: ov5640_init_slave_id: failed with -6
[    2.357543] ov5640 1-0021: Dropping the link to regulator.5
[    2.363224] ov5640 1-0021: Dropping the link to regulator.6
[    2.368829] ov5640 1-0021: Dropping the link to regulator.4

Here is the full log [1], please let me know if I miss anything, I
even tried to remove MCLK pin

[1] https://paste.ubuntu.com/p/yfy5cvs32x/

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