[PATCH v3 3/4] arm64: dts: rockchip: describe I2c Bus 1 and IMX258 world camera on PinePhone Pro
Olivier Benjamin
olivier.benjamin at bootlin.com
Tue May 13 21:59:30 PDT 2025
On 5/13/25 20:23, Heiko Stuebner wrote:
> Hi Olivier,
>
Hello Heiko, thanks for having a look!
> Am Freitag, 9. Mai 2025, 23:51:39 Mitteleuropäische Sommerzeit schrieb Olivier Benjamin:
>> Add the description of the rear/world camera (IMX258) on the PinePhone Pro
>> to the device dts file.
>> It receives commands on the I2C Bus 1 at address 0x1a and transmits data
>> over CSI-MIPI.
>>
>> The I2C address for IMX258 can be found in the IMX258-0AQH5 Software
>> Reference Manual, page 24, section 2.3.1: 0b0011010 = 0x1a.
>> Section 3 indicates the module has 4 pairs of data lines. While 4-lane
>> mode is nominal, 2-lane mode should also be supported.
>>
>> The pin muxing info was extracted from the PinePhone Pro schematic v1.0
>> as well as the RK3399 datasheet revision 1.8.
>>
>> Table 2-3 in section 2.8 of the RK3399 datasheet contains the mapping
>> of IO functions for the SoC pins. Page 52 shows GPIO1_A0, page 54 shows
>> GPIO2_D4.
>>
>> For I2C power, the PinePhone Pro schematic page 11 quadrants A4 and A5:
>> RK3399_J.AA8 and RK3399_J.Y8 get power from vcaa1v8_codec, so turn it on
>>
>> The IMX258 also uses the following regulators, expected by its driver:
>> - vana (2.8V analog), called AVDD2V8_DVP on P.18 q.C1 and derived from
>> VCC1V8_S3 on P.13 q.B2
>> - vdig (1.2V digital core), called DVDD_DVP on P.18 q.C1 and shown on
>> P.18 q.D3 to be equivalent to VCC1V2_DVP derived from VCC3V3_SYS on
>> P.13 q.B3. Note that this regulator's voltage is inconsistently
>> labeled either 1.2V or 1.5V
>>
>> RK3399_J.AG1 is GPIO4_A1/I2C1_SDA, RK3399_J.Y6 is GPIO4_A2/I2C1_SCL
>> This is the default pinctrl "i2c1_xfer" for i2c1 from rk3399-base.
>>
>> For the reset (RESET) signal:
>> page 11 quadrant D2 | p.18 q.C3-4 | p.18 q.C2
>> RK3399_E.R25 -> GPIO1_A0 -> Camera_RST -> MIPI_RST0 -> IMX258.12
>>
>> For the powerdown (PWDN) signal:
>> page 11 quadrants B4-5 | p.18 q.C2
>> RK3399_G.AF8 -> GPIO2_D4 -> DVP_PDN1_H -> IMX258.14
>>
>> Helped-by: Dragan Simic <dsimic at manjaro.org>
>> Co-developed-by: Ondrej Jirman <megi at xff.cz>
>> Signed-off-by: Ondrej Jirman <megi at xff.cz>
>> Signed-off-by: Olivier Benjamin <olivier.benjamin at bootlin.com>
>
> how independent are the devicetree changes from the binding changes?
> As the binding change "only" includes other properties.
>
They are pretty independent: the binding changes are only needed to
suppress warnings on the devicetree.
However, the changes to the devicetree are the motivation for the
changes to the binding: the other properties are not strictly necessary
otherwise.
> Heiko
>
>
>> ---
>> .../boot/dts/rockchip/rk3399-pinephone-pro.dts | 94 ++++++++++++++++++++++
>> 1 file changed, 94 insertions(+)
>>
>> diff --git a/arch/arm64/boot/dts/rockchip/rk3399-pinephone-pro.dts b/arch/arm64/boot/dts/rockchip/rk3399-pinephone-pro.dts
>> index 04ba4c4565d0a205e2e46d7535c6a3190993621d..588e2d8a049cc649aa227c7a885bd494f23fbdf8 100644
>> --- a/arch/arm64/boot/dts/rockchip/rk3399-pinephone-pro.dts
>> +++ b/arch/arm64/boot/dts/rockchip/rk3399-pinephone-pro.dts
>> @@ -114,6 +114,16 @@ vcc3v3_sys: regulator-vcc3v3-sys {
>> vin-supply = <&vcc_sys>;
>> };
>>
>> + avdd2v8_dvp: regulator-avdd2v8-dvp {
>> + compatible = "regulator-fixed";
>> + regulator-name = "avdd2v8_dvp";
>> + regulator-always-on;
>> + regulator-boot-on;
>> + regulator-min-microvolt = <2800000>;
>> + regulator-max-microvolt = <2800000>;
>> + vin-supply = <&vcc3v3_sys>;
>> + };
>> +
>> vcca1v8_s3: regulator-vcc1v8-s3 {
>> compatible = "regulator-fixed";
>> regulator-name = "vcca1v8_s3";
>> @@ -136,6 +146,16 @@ vcc1v8_codec: regulator-vcc1v8-codec {
>> vin-supply = <&vcc3v3_sys>;
>> };
>>
>> + vcc1v2_dvp: regulator-vcc1v2-dvp {
>> + compatible = "regulator-fixed";
>> + regulator-name = "vcc1v2_dvp";
>> + regulator-always-on;
>> + regulator-boot-on;
>> + regulator-min-microvolt = <1200000>;
>> + regulator-max-microvolt = <1200000>;
>> + vin-supply = <&vcca1v8_s3>;
>> + };
>> +
>> wifi_pwrseq: sdio-wifi-pwrseq {
>> compatible = "mmc-pwrseq-simple";
>> clocks = <&rk818 1>;
>> @@ -312,6 +332,8 @@ vcc3v0_touch: LDO_REG2 {
>>
>> vcca1v8_codec: LDO_REG3 {
>> regulator-name = "vcca1v8_codec";
>> + regulator-always-on;
>> + regulator-boot-on;
>> regulator-min-microvolt = <1800000>;
>> regulator-max-microvolt = <1800000>;
>> };
>> @@ -420,6 +442,46 @@ regulator-state-mem {
>> };
>> };
>>
>> +&i2c1 {
>> + clock-frequency = <400000>;
>> + pinctrl-0 = <&i2c1_xfer &cif_clkouta>;
>> + assigned-clocks = <&cru SCLK_CIF_OUT>;
>> + assigned-clock-rates = <24000000>;
>> + status = "okay";
>> +
>> + wcam: camera at 1a {
>> + compatible = "sony,imx258";
>> + reg = <0x1a>;
>> + clocks = <&cru SCLK_CIF_OUT>; /* MIPI_MCLK0, derived from CIF_CLKO */
>> + clock-names = "xvclk";
>> + pinctrl-names = "default";
>> + pinctrl-0 = <&wcam_rst>;
>> + /* Note: both cameras also depend on vcca1v8_codec to power the I2C bus. */
>> + vif-supply = <&vcc1v8_dvp>;
>> + vana-supply = <&avdd2v8_dvp>;
>> + vdig-supply = <&vcc1v2_dvp>; /* DVDD_DVP is the same as VCC1V2_DVP */
>> + reset-gpios = <&gpio1 RK_PA0 GPIO_ACTIVE_LOW>;
>> + orientation = <1>; /* V4L2_CAMERA_ORIENTATION_BACK */
>> + rotation = <270>;
>> + lens-focus = <&wcam_lens>;
>> +
>> + port {
>> + wcam_out: endpoint {
>> + remote-endpoint = <&mipi_in_wcam>;
>> + data-lanes = <1 2 3 4>;
>> + link-frequencies = /bits/ 64 <636000000>;
>> + };
>> + };
>> + };
>> +
>> + wcam_lens: camera-lens at c {
>> + compatible = "dongwoon,dw9714";
>> + reg = <0x0c>;
>> + /* Same I2c bus as both cameras, depends on vcca1v8_codec for power. */
>> + vcc-supply = <&vcc1v8_dvp>;
>> + };
>> +};
>> +
>> &i2c3 {
>> i2c-scl-rising-time-ns = <450>;
>> i2c-scl-falling-time-ns = <15>;
>> @@ -462,6 +524,28 @@ &io_domains {
>> status = "okay";
>> };
>>
>> +&isp1 {
>> + status = "okay";
>> +
>> + ports {
>> + port at 0 {
>> + mipi_in_wcam: endpoint at 0 {
>> + reg = <0>;
>> + remote-endpoint = <&wcam_out>;
>> + data-lanes = <1 2 3 4>;
>> + };
>> + };
>> + };
>> +};
>> +
>> +&mipi_dphy_rx0 {
>> + status = "okay";
>> +};
>> +
>> +&isp1_mmu {
>> + status = "okay";
>> +};
>> +
>> &mipi_dsi {
>> status = "okay";
>> clock-master;
>> @@ -495,6 +579,10 @@ mipi_in_panel: endpoint {
>> };
>> };
>>
>> +&mipi_dsi1 {
>> + status = "okay";
>> +};
>> +
>> &pmu_io_domains {
>> pmu1830-supply = <&vcc_1v8>;
>> status = "okay";
>> @@ -507,6 +595,12 @@ pwrbtn_pin: pwrbtn-pin {
>> };
>> };
>>
>> + camera {
>> + wcam_rst: wcam-rst {
>> + rockchip,pins = <1 RK_PA0 RK_FUNC_GPIO &pcfg_pull_none>;
>> + };
>> + };
>> +
>> leds {
>> red_led_pin: red-led-pin {
>> rockchip,pins = <4 RK_PD2 RK_FUNC_GPIO &pcfg_pull_none>;
>>
>>
>
>
>
>
>
--
Olivier Benjamin, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com
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