The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/media/allegro.txt

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    1 Device-tree bindings for the Allegro DVT video IP codecs present in the Xilinx
    2 ZynqMP SoC. The IP core may either be a H.264/H.265 encoder or H.264/H.265
    3 decoder ip core.
    4 
    5 Each actual codec engines is controlled by a microcontroller (MCU). Host
    6 software uses a provided mailbox interface to communicate with the MCU. The
    7 MCU share an interrupt.
    8 
    9 Required properties:
   10   - compatible: value should be one of the following
   11     "allegro,al5e-1.1", "allegro,al5e": encoder IP core
   12     "allegro,al5d-1.1", "allegro,al5d": decoder IP core
   13   - reg: base and length of the memory mapped register region and base and
   14     length of the memory mapped sram
   15   - reg-names: must include "regs" and "sram"
   16   - interrupts: shared interrupt from the MCUs to the processing system
   17   - clocks: must contain an entry for each entry in clock-names
   18   - clock-names: must include "core_clk", "mcu_clk", "m_axi_core_aclk",
   19     "m_axi_mcu_aclk", "s_axi_lite_aclk"
   20 
   21 Example:
   22         al5e: video-codec@a0009000 {
   23                 compatible = "allegro,al5e-1.1", "allegro,al5e";
   24                 reg = <0 0xa0009000 0 0x1000>,
   25                       <0 0xa0000000 0 0x8000>;
   26                 reg-names = "regs", "sram";
   27                 interrupts = <0 96 4>;
   28                 clocks = <&xlnx_vcu 0>, <&xlnx_vcu 1>,
   29                          <&clkc 71>, <&clkc 71>, <&clkc 71>;
   30                 clock-names = "core_clk", "mcu_clk", "m_axi_core_aclk",
   31                               "m_axi_mcu_aclk", "s_axi_lite_aclk"
   32         };
   33         al5d: video-codec@a0029000 {
   34                 compatible = "allegro,al5d-1.1", "allegro,al5d";
   35                 reg = <0 0xa0029000 0 0x1000>,
   36                       <0 0xa0020000 0 0x8000>;
   37                 reg-names = "regs", "sram";
   38                 interrupts = <0 96 4>;
   39                 clocks = <&xlnx_vcu 2>, <&xlnx_vcu 3>,
   40                          <&clkc 71>, <&clkc 71>, <&clkc 71>;
   41                 clock-names = "core_clk", "mcu_clk", "m_axi_core_aclk",
   42                               "m_axi_mcu_aclk", "s_axi_lite_aclk"
   43         };

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