| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame^] | 1 | Marvell 8897/8997 (sd8897/sd8997) bluetooth devices (SDIO or USB based) |
| 2 | ------ |
| 3 | The 8997 devices supports multiple interfaces. When used on SDIO interfaces, |
| 4 | the btmrvl driver is used and when used on USB interface, the btusb driver is |
| 5 | used. |
| 6 | |
| 7 | Required properties: |
| 8 | |
| 9 | - compatible : should be one of the following: |
| 10 | * "marvell,sd8897-bt" (for SDIO) |
| 11 | * "marvell,sd8997-bt" (for SDIO) |
| 12 | * "usb1286,204e" (for USB) |
| 13 | |
| 14 | Optional properties: |
| 15 | |
| 16 | - marvell,cal-data: Calibration data downloaded to the device during |
| 17 | initialization. This is an array of 28 values(u8). |
| 18 | This is only applicable to SDIO devices. |
| 19 | |
| 20 | - marvell,wakeup-pin: It represents wakeup pin number of the bluetooth chip. |
| 21 | firmware will use the pin to wakeup host system (u16). |
| 22 | - marvell,wakeup-gap-ms: wakeup gap represents wakeup latency of the host |
| 23 | platform. The value will be configured to firmware. This |
| 24 | is needed to work chip's sleep feature as expected (u16). |
| 25 | - interrupt-names: Used only for USB based devices (See below) |
| 26 | - interrupts : specifies the interrupt pin number to the cpu. For SDIO, the |
| 27 | driver will use the first interrupt specified in the interrupt |
| 28 | array. For USB based devices, the driver will use the interrupt |
| 29 | named "wakeup" from the interrupt-names and interrupt arrays. |
| 30 | The driver will request an irq based on this interrupt number. |
| 31 | During system suspend, the irq will be enabled so that the |
| 32 | bluetooth chip can wakeup host platform under certain |
| 33 | conditions. During system resume, the irq will be disabled |
| 34 | to make sure unnecessary interrupt is not received. |
| 35 | |
| 36 | Example: |
| 37 | |
| 38 | IRQ pin 119 is used as system wakeup source interrupt. |
| 39 | wakeup pin 13 and gap 100ms are configured so that firmware can wakeup host |
| 40 | using this device side pin and wakeup latency. |
| 41 | |
| 42 | Example for SDIO device follows (calibration data is also available in |
| 43 | below example). |
| 44 | |
| 45 | &mmc3 { |
| 46 | vmmc-supply = <&wlan_en_reg>; |
| 47 | bus-width = <4>; |
| 48 | cap-power-off-card; |
| 49 | keep-power-in-suspend; |
| 50 | |
| 51 | #address-cells = <1>; |
| 52 | #size-cells = <0>; |
| 53 | btmrvl: bluetooth@2 { |
| 54 | compatible = "marvell,sd8897-bt"; |
| 55 | reg = <2>; |
| 56 | interrupt-parent = <&pio>; |
| 57 | interrupts = <119 IRQ_TYPE_LEVEL_LOW>; |
| 58 | |
| 59 | marvell,cal-data = /bits/ 8 < |
| 60 | 0x37 0x01 0x1c 0x00 0xff 0xff 0xff 0xff 0x01 0x7f 0x04 0x02 |
| 61 | 0x00 0x00 0xba 0xce 0xc0 0xc6 0x2d 0x00 0x00 0x00 0x00 0x00 |
| 62 | 0x00 0x00 0xf0 0x00>; |
| 63 | marvell,wakeup-pin = /bits/ 16 <0x0d>; |
| 64 | marvell,wakeup-gap-ms = /bits/ 16 <0x64>; |
| 65 | }; |
| 66 | }; |
| 67 | |
| 68 | Example for USB device: |
| 69 | |
| 70 | &usb_host1_ohci { |
| 71 | #address-cells = <1>; |
| 72 | #size-cells = <0>; |
| 73 | |
| 74 | mvl_bt1: bt@1 { |
| 75 | compatible = "usb1286,204e"; |
| 76 | reg = <1>; |
| 77 | interrupt-parent = <&gpio0>; |
| 78 | interrupt-names = "wakeup"; |
| 79 | interrupts = <119 IRQ_TYPE_LEVEL_LOW>; |
| 80 | marvell,wakeup-pin = /bits/ 16 <0x0d>; |
| 81 | marvell,wakeup-gap-ms = /bits/ 16 <0x64>; |
| 82 | }; |
| 83 | }; |