cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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i2c-rk3x.yaml (3770B)

      1# SPDX-License-Identifier: GPL-2.0
      2%YAML 1.2
      3---
      4$id: http://devicetree.org/schemas/i2c/i2c-rk3x.yaml#
      5$schema: http://devicetree.org/meta-schemas/core.yaml#
      6
      7title: Rockchip RK3xxx I2C controller
      8
      9description:
     10  This driver interfaces with the native I2C controller present in Rockchip
     11  RK3xxx SoCs.
     12
     13allOf:
     14  - $ref: /schemas/i2c/i2c-controller.yaml#
     15
     16maintainers:
     17  - Heiko Stuebner <heiko@sntech.de>
     18
     19# Everything else is described in the common file
     20properties:
     21  compatible:
     22    oneOf:
     23      - const: rockchip,rv1108-i2c
     24      - const: rockchip,rk3066-i2c
     25      - const: rockchip,rk3188-i2c
     26      - const: rockchip,rk3228-i2c
     27      - const: rockchip,rk3288-i2c
     28      - const: rockchip,rk3399-i2c
     29      - items:
     30          - enum:
     31              - rockchip,rk3036-i2c
     32              - rockchip,rk3368-i2c
     33          - const: rockchip,rk3288-i2c
     34      - items:
     35          - enum:
     36              - rockchip,px30-i2c
     37              - rockchip,rk3308-i2c
     38              - rockchip,rk3328-i2c
     39              - rockchip,rk3568-i2c
     40          - const: rockchip,rk3399-i2c
     41
     42  reg:
     43    maxItems: 1
     44
     45  interrupts:
     46    maxItems: 1
     47
     48  clocks:
     49    minItems: 1
     50    items:
     51      - description:
     52          For older hardware (rk3066, rk3188, rk3228, rk3288)
     53          there is one clock that is used both to derive the functional clock
     54          for the device and as the bus clock.
     55          For newer hardware (rk3399) this clock is used to derive
     56          the functional clock
     57      - description:
     58          For newer hardware (rk3399) this is the bus clock
     59
     60  clock-names:
     61    minItems: 1
     62    items:
     63      - const: i2c
     64      - const: pclk
     65
     66  rockchip,grf:
     67    $ref: /schemas/types.yaml#/definitions/phandle
     68    description:
     69      Required on RK3066, RK3188 the phandle of the syscon node for
     70      the general register file (GRF)
     71      On those SoCs an alias with the correct I2C bus ID
     72      (bit offset in the GRF) is also required.
     73
     74  clock-frequency:
     75    default: 100000
     76    description:
     77      SCL frequency to use (in Hz). If omitted, 100kHz is used.
     78
     79  i2c-scl-rising-time-ns:
     80    default: 1000
     81    description:
     82      Number of nanoseconds the SCL signal takes to rise
     83      (t(r) in I2C specification). If not specified this is assumed to be
     84      the maximum the specification allows(1000 ns for Standard-mode,
     85      300 ns for Fast-mode) which might cause slightly slower communication.
     86
     87  i2c-scl-falling-time-ns:
     88    default: 300
     89    description:
     90      Number of nanoseconds the SCL signal takes to fall
     91      (t(f) in the I2C specification). If not specified this is assumed to
     92      be the maximum the specification allows (300 ns) which might cause
     93      slightly slower communication.
     94
     95  i2c-sda-falling-time-ns:
     96    default: 300
     97    description:
     98      Number of nanoseconds the SDA signal takes to fall
     99      (t(f) in the I2C specification). If not specified we will use the SCL
    100      value since they are the same in nearly all cases.
    101
    102required:
    103  - compatible
    104  - reg
    105  - interrupts
    106  - clocks
    107  - clock-names
    108
    109if:
    110  properties:
    111    compatible:
    112      contains:
    113        enum:
    114          - rockchip,rk3066-i2c
    115          - rockchip,rk3188-i2c
    116
    117then:
    118  required:
    119    - rockchip,grf
    120
    121unevaluatedProperties: false
    122
    123examples:
    124  - |
    125    #include <dt-bindings/clock/rk3188-cru-common.h>
    126    #include <dt-bindings/interrupt-controller/arm-gic.h>
    127    #include <dt-bindings/interrupt-controller/irq.h>
    128    i2c0: i2c@2002d000 {
    129      compatible = "rockchip,rk3188-i2c";
    130      reg = <0x2002d000 0x1000>;
    131      interrupts = <GIC_SPI 40 IRQ_TYPE_LEVEL_HIGH>;
    132      clocks = <&cru PCLK_I2C0>;
    133      clock-names = "i2c";
    134      rockchip,grf = <&grf>;
    135      i2c-scl-falling-time-ns = <100>;
    136      i2c-scl-rising-time-ns = <800>;
    137      #address-cells = <1>;
    138      #size-cells = <0>;
    139    };