Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) Freescale's NAND flash controller (NFC)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) This variant of the Freescale NAND flash controller (NFC) can be found on
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) Vybrid (vf610), MPC5125, MCF54418 and Kinetis K70.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) Required properties:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) - compatible: Should be set to "fsl,vf610-nfc".
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) - reg: address range of the NFC.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) - interrupts: interrupt of the NFC.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) - #address-cells: shall be set to 1. Encode the nand CS.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) - #size-cells : shall be set to 0.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) - assigned-clocks: main clock from the SoC, for Vybrid <&clks VF610_CLK_NFC>;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) - assigned-clock-rates: The NAND bus timing is derived from this clock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)     rate and should not exceed maximum timing for any NAND memory chip
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)     in a board stuffing. Typical NAND memory timings derived from this
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)     clock are found in the SoC hardware reference manual. Furthermore,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)     there might be restrictions on maximum rates when using hardware ECC.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) - #address-cells, #size-cells : Must be present if the device has sub-nodes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)   representing partitions.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) Required children nodes:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) Children nodes represent the available nand chips. Currently the driver can
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) only handle one NAND chip.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) Required properties:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) - compatible: Should be set to "fsl,vf610-nfc-cs".
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) - nand-bus-width: see nand-controller.yaml
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) - nand-ecc-mode: see nand-controller.yaml
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) Required properties for hardware ECC:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) - nand-ecc-strength: supported strengths are 24 and 32 bit (see nand-controller.yaml)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) - nand-ecc-step-size: step size equals page size, currently only 2k pages are
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)     supported
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) - nand-on-flash-bbt: see nand-controller.yaml
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) Example:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 	nfc: nand@400e0000 {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 		compatible = "fsl,vf610-nfc";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 		#address-cells = <1>;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 		#size-cells = <0>;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 		reg = <0x400e0000 0x4000>;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 		interrupts = <GIC_SPI 83 IRQ_TYPE_LEVEL_HIGH>;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 		clocks = <&clks VF610_CLK_NFC>;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 		clock-names = "nfc";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 		assigned-clocks = <&clks VF610_CLK_NFC>;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 		assigned-clock-rates = <33000000>;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 		nand@0 {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 			compatible = "fsl,vf610-nfc-nandcs";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 			reg = <0>;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 			nand-bus-width = <8>;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 			nand-ecc-mode = "hw";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 			nand-ecc-strength = <32>;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 			nand-ecc-step-size = <2048>;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 			nand-on-flash-bbt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 		};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 	};