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53 lines
1.7 KiB
53 lines
1.7 KiB
TI QSPI controller. |
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Required properties: |
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- compatible : should be "ti,dra7xxx-qspi" or "ti,am4372-qspi". |
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- reg: Should contain QSPI registers location and length. |
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- reg-names: Should contain the resource reg names. |
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- qspi_base: Qspi configuration register Address space |
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- qspi_mmap: Memory mapped Address space |
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- (optional) qspi_ctrlmod: Control module Address space |
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- interrupts: should contain the qspi interrupt number. |
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- #address-cells, #size-cells : Must be present if the device has sub-nodes |
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- ti,hwmods: Name of the hwmod associated to the QSPI |
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Recommended properties: |
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- spi-max-frequency: Definition as per |
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Documentation/devicetree/bindings/spi/spi-bus.txt |
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Optional properties: |
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- syscon-chipselects: Handle to system control region contains QSPI |
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chipselect register and offset of that register. |
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NOTE: TI QSPI controller requires different pinmux and IODelay |
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parameters for Mode-0 and Mode-3 operations, which needs to be set up by |
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the bootloader (U-Boot). Default configuration only supports Mode-0 |
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operation. Hence, "spi-cpol" and "spi-cpha" DT properties cannot be |
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specified in the slave nodes of TI QSPI controller without appropriate |
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modification to bootloader. |
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Example: |
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For am4372: |
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qspi: qspi@47900000 { |
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compatible = "ti,am4372-qspi"; |
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reg = <0x47900000 0x100>, <0x30000000 0x4000000>; |
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reg-names = "qspi_base", "qspi_mmap"; |
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#address-cells = <1>; |
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#size-cells = <0>; |
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spi-max-frequency = <25000000>; |
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ti,hwmods = "qspi"; |
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}; |
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For dra7xx: |
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qspi: qspi@4b300000 { |
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compatible = "ti,dra7xxx-qspi"; |
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reg = <0x4b300000 0x100>, |
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<0x5c000000 0x4000000>, |
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reg-names = "qspi_base", "qspi_mmap"; |
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syscon-chipselects = <&scm_conf 0x558>; |
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#address-cells = <1>; |
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#size-cells = <0>; |
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spi-max-frequency = <48000000>; |
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ti,hwmods = "qspi"; |
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};
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