85 lines
2.8 KiB
Plaintext
85 lines
2.8 KiB
Plaintext
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Marvell 8897/8997 (sd8897/sd8997) bluetooth devices (SDIO or USB based)
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------
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The 8997 devices supports multiple interfaces. When used on SDIO interfaces,
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the btmrvl driver is used and when used on USB interface, the btusb driver is
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used.
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Required properties:
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- compatible : should be one of the following:
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* "marvell,sd8897-bt" (for SDIO)
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* "marvell,sd8997-bt" (for SDIO)
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* "usb1286,204e" (for USB)
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Optional properties:
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- marvell,cal-data: Calibration data downloaded to the device during
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initialization. This is an array of 28 values(u8).
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This is only applicable to SDIO devices.
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- marvell,wakeup-pin: It represents wakeup pin number of the bluetooth chip.
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firmware will use the pin to wakeup host system (u16).
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- marvell,wakeup-gap-ms: wakeup gap represents wakeup latency of the host
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platform. The value will be configured to firmware. This
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is needed to work chip's sleep feature as expected (u16).
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- interrupt-parent: phandle of the parent interrupt controller
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- interrupt-names: Used only for USB based devices (See below)
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- interrupts : specifies the interrupt pin number to the cpu. For SDIO, the
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driver will use the first interrupt specified in the interrupt
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array. For USB based devices, the driver will use the interrupt
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named "wakeup" from the interrupt-names and interrupt arrays.
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The driver will request an irq based on this interrupt number.
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During system suspend, the irq will be enabled so that the
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bluetooth chip can wakeup host platform under certain
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conditions. During system resume, the irq will be disabled
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to make sure unnecessary interrupt is not received.
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Example:
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IRQ pin 119 is used as system wakeup source interrupt.
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wakeup pin 13 and gap 100ms are configured so that firmware can wakeup host
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using this device side pin and wakeup latency.
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Example for SDIO device follows (calibration data is also available in
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below example).
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&mmc3 {
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vmmc-supply = <&wlan_en_reg>;
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bus-width = <4>;
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cap-power-off-card;
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keep-power-in-suspend;
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#address-cells = <1>;
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#size-cells = <0>;
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btmrvl: bluetooth@2 {
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compatible = "marvell,sd8897-bt";
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reg = <2>;
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interrupt-parent = <&pio>;
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interrupts = <119 IRQ_TYPE_LEVEL_LOW>;
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marvell,cal-data = /bits/ 8 <
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0x37 0x01 0x1c 0x00 0xff 0xff 0xff 0xff 0x01 0x7f 0x04 0x02
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0x00 0x00 0xba 0xce 0xc0 0xc6 0x2d 0x00 0x00 0x00 0x00 0x00
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0x00 0x00 0xf0 0x00>;
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marvell,wakeup-pin = /bits/ 16 <0x0d>;
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marvell,wakeup-gap-ms = /bits/ 16 <0x64>;
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};
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};
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Example for USB device:
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&usb_host1_ohci {
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#address-cells = <1>;
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#size-cells = <0>;
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mvl_bt1: bt@1 {
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compatible = "usb1286,204e";
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reg = <1>;
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interrupt-parent = <&gpio0>;
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interrupt-names = "wakeup";
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interrupts = <119 IRQ_TYPE_LEVEL_LOW>;
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marvell,wakeup-pin = /bits/ 16 <0x0d>;
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marvell,wakeup-gap-ms = /bits/ 16 <0x64>;
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};
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};
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