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9336eb829a
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@manjaro.org> Co-developed-by: Ondrej Jirman <megi@xff.cz> Signed-off-by: Ondrej Jirman <megi@xff.cz> Signed-off-by: Olivier Benjamin <olivier.benjamin@bootlin.com> Link: https://lore.kernel.org/r/20250620-camera-v4-3-0201a8ed5fae@bootlin.com Signed-off-by: Heiko Stuebner <heiko@sntech.de> |
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.