233 lines
6.2 KiB
Text
233 lines
6.2 KiB
Text
Broadcom SPI controller
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The Broadcom SPI controller is a SPI master found on various SOCs, including
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BRCMSTB (BCM7XXX), Cygnus, NSP and NS2. The Broadcom Master SPI hw IP consits
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of :
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MSPI : SPI master controller can read and write to a SPI slave device
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BSPI : Broadcom SPI in combination with the MSPI hw IP provides acceleration
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for flash reads and be configured to do single, double, quad lane
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io with 3-byte and 4-byte addressing support.
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Supported Broadcom SoCs have one instance of MSPI+BSPI controller IP.
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MSPI master can be used wihout BSPI. BRCMSTB SoCs have an additional instance
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of a MSPI master without the BSPI to use with non flash slave devices that
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use SPI protocol.
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Required properties:
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- #address-cells:
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Must be <1>, as required by generic SPI binding.
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- #size-cells:
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Must be <0>, also as required by generic SPI binding.
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- compatible:
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Must be one of :
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"brcm,spi-bcm-qspi", "brcm,spi-brcmstb-qspi" : MSPI+BSPI on BRCMSTB SoCs
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"brcm,spi-bcm-qspi", "brcm,spi-brcmstb-mspi" : Second Instance of MSPI
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BRCMSTB SoCs
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"brcm,spi-bcm-qspi", "brcm,spi-nsp-qspi" : MSPI+BSPI on Cygnus, NSP
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"brcm,spi-bcm-qspi", "brcm,spi-ns2-qspi" : NS2 SoCs
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- reg:
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Define the bases and ranges of the associated I/O address spaces.
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The required range is MSPI controller registers.
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- reg-names:
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First name does not matter, but must be reserved for the MSPI controller
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register range as mentioned in 'reg' above, and will typically contain
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- "bspi_regs": BSPI register range, not required with compatible
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"spi-brcmstb-mspi"
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- "mspi_regs": MSPI register range is required for compatible strings
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- "intr_regs", "intr_status_reg" : Interrupt and status register for
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NSP, NS2, Cygnus SoC
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- interrupts
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The interrupts used by the MSPI and/or BSPI controller.
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- interrupt-names:
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Names of interrupts associated with MSPI
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- "mspi_halted" :
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- "mspi_done": Indicates that the requested SPI operation is complete.
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- "spi_lr_fullness_reached" : Linear read BSPI pipe full
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- "spi_lr_session_aborted" : Linear read BSPI pipe aborted
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- "spi_lr_impatient" : Linear read BSPI requested when pipe empty
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- "spi_lr_session_done" : Linear read BSPI session done
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- clocks:
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A phandle to the reference clock for this block.
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Optional properties:
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- native-endian
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Defined when using BE SoC and device uses BE register read/write
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Recommended optional m25p80 properties:
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- spi-rx-bus-width: Definition as per
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Documentation/devicetree/bindings/spi/spi-bus.txt
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Examples:
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BRCMSTB SoC Example:
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SPI Master (MSPI+BSPI) for SPI-NOR access:
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spi@f03e3400 {
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#address-cells = <0x1>;
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#size-cells = <0x0>;
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compatible = "brcm,spi-brcmstb-qspi", "brcm,spi-brcmstb-qspi";
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reg = <0xf03e0920 0x4 0xf03e3400 0x188 0xf03e3200 0x50>;
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reg-names = "cs_reg", "mspi", "bspi";
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interrupts = <0x6 0x5 0x4 0x3 0x2 0x1 0x0>;
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interrupt-parent = <0x1c>;
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interrupt-names = "mspi_halted",
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"mspi_done",
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"spi_lr_overread",
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"spi_lr_session_done",
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"spi_lr_impatient",
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"spi_lr_session_aborted",
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"spi_lr_fullness_reached";
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clocks = <&hif_spi>;
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clock-names = "sw_spi";
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m25p80@0 {
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#size-cells = <0x2>;
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#address-cells = <0x2>;
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compatible = "m25p80";
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reg = <0x0>;
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spi-max-frequency = <0x2625a00>;
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spi-cpol;
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spi-cpha;
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m25p,fast-read;
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flash0.bolt@0 {
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reg = <0x0 0x0 0x0 0x100000>;
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};
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flash0.macadr@100000 {
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reg = <0x0 0x100000 0x0 0x10000>;
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};
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flash0.nvram@110000 {
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reg = <0x0 0x110000 0x0 0x10000>;
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};
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flash0.kernel@120000 {
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reg = <0x0 0x120000 0x0 0x400000>;
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};
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flash0.devtree@520000 {
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reg = <0x0 0x520000 0x0 0x10000>;
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};
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flash0.splash@530000 {
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reg = <0x0 0x530000 0x0 0x80000>;
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};
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flash0@0 {
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reg = <0x0 0x0 0x0 0x4000000>;
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};
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};
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};
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MSPI master for any SPI device :
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spi@f0416000 {
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#address-cells = <1>;
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#size-cells = <0>;
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clocks = <&upg_fixed>;
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compatible = "brcm,spi-brcmstb-qspi", "brcm,spi-brcmstb-mspi";
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reg = <0xf0416000 0x180>;
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reg-names = "mspi";
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interrupts = <0x14>;
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interrupt-parent = <&irq0_aon_intc>;
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interrupt-names = "mspi_done";
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};
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iProc SoC Example:
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qspi: spi@18027200 {
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compatible = "brcm,spi-bcm-qspi", "brcm,spi-nsp-qspi";
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reg = <0x18027200 0x184>,
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<0x18027000 0x124>,
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<0x1811c408 0x004>,
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<0x180273a0 0x01c>;
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reg-names = "mspi_regs", "bspi_regs", "intr_regs", "intr_status_reg";
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interrupts = <GIC_SPI 72 IRQ_TYPE_LEVEL_HIGH>,
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<GIC_SPI 73 IRQ_TYPE_LEVEL_HIGH>,
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<GIC_SPI 74 IRQ_TYPE_LEVEL_HIGH>,
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<GIC_SPI 75 IRQ_TYPE_LEVEL_HIGH>,
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<GIC_SPI 76 IRQ_TYPE_LEVEL_HIGH>,
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<GIC_SPI 77 IRQ_TYPE_LEVEL_HIGH>,
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<GIC_SPI 78 IRQ_TYPE_LEVEL_HIGH>;
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interrupt-names =
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"spi_lr_fullness_reached",
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"spi_lr_session_aborted",
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"spi_lr_impatient",
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"spi_lr_session_done",
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"mspi_done",
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"mspi_halted";
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clocks = <&iprocmed>;
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clock-names = "iprocmed";
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num-cs = <2>;
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#address-cells = <1>;
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#size-cells = <0>;
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};
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NS2 SoC Example:
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qspi: spi@66470200 {
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compatible = "brcm,spi-bcm-qspi", "brcm,spi-ns2-qspi";
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reg = <0x66470200 0x184>,
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<0x66470000 0x124>,
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<0x67017408 0x004>,
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<0x664703a0 0x01c>;
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reg-names = "mspi", "bspi", "intr_regs",
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"intr_status_reg";
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interrupts = <GIC_SPI 419 IRQ_TYPE_LEVEL_HIGH>;
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interrupt-names = "spi_l1_intr";
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clocks = <&iprocmed>;
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clock-names = "iprocmed";
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num-cs = <2>;
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#address-cells = <1>;
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#size-cells = <0>;
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};
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m25p80 node for NSP, NS2
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&qspi {
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flash: m25p80@0 {
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#address-cells = <1>;
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#size-cells = <1>;
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compatible = "m25p80";
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reg = <0x0>;
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spi-max-frequency = <12500000>;
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m25p,fast-read;
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spi-cpol;
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spi-cpha;
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partition@0 {
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label = "boot";
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reg = <0x00000000 0x000a0000>;
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};
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partition@a0000 {
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label = "env";
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reg = <0x000a0000 0x00060000>;
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};
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partition@100000 {
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label = "system";
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reg = <0x00100000 0x00600000>;
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};
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partition@700000 {
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label = "rootfs";
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reg = <0x00700000 0x01900000>;
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};
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};
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