| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 1 | STMicroelectronics Co-Processor Bindings |
| 2 | ---------------------------------------- |
| 3 | |
| 4 | This binding provides support for adjunct processors found on ST SoCs. |
| 5 | |
| 6 | Co-processors can be controlled from the bootloader or the primary OS. If |
| 7 | the bootloader starts a co-processor, the primary OS must detect its state |
| 8 | and act accordingly. |
| 9 | |
| 10 | Required properties: |
| 11 | - compatible Should be one of: |
| 12 | "st,st231-rproc" |
| 13 | "st,st40-rproc" |
| 14 | - memory-region Reserved memory (See: ../reserved-memory/reserved-memory.txt) |
| 15 | - resets Reset lines (See: ../reset/reset.txt) |
| 16 | - reset-names Must be "sw_reset" and "pwr_reset" |
| 17 | - clocks Clock for co-processor (See: ../clock/clock-bindings.txt) |
| 18 | - clock-frequency Clock frequency to set co-processor at if the bootloader |
| 19 | hasn't already done so |
| 20 | - st,syscfg System configuration register which holds the boot vector |
| 21 | for the co-processor |
| 22 | 1st cell: Phandle to syscon block |
| 23 | 2nd cell: Boot vector register offset |
| 24 | |
| 25 | Example: |
| 26 | |
| 27 | audio_reserved: rproc@42000000 { |
| 28 | compatible = "shared-dma-pool"; |
| 29 | reg = <0x42000000 0x01000000>; |
| 30 | no-map; |
| 31 | }; |
| 32 | |
| 33 | st231-audio { |
| 34 | compatible = "st,st231-rproc"; |
| 35 | memory-region = <&audio_reserved>; |
| 36 | resets = <&softreset STIH407_ST231_AUD_SOFTRESET>; |
| 37 | reset-names = "sw_reset"; |
| 38 | clocks = <&clk_s_c0_flexgen CLK_ST231_AUD_0>; |
| 39 | clock-frequency = <600000000>; |
| 40 | st,syscfg = <&syscfg_core 0x228>; |
| 41 | }; |