On Wed, Mar 30, 2016 at 8:20 AM, Amitkumar Karwar <akarwar@xxxxxxxxxxx> wrote:
> From: Xinming Hu <huxm@xxxxxxxxxxx>
>
> Add device tree binding documentation for MARVELL's bluetooth sdio
> (sd8897 and sd8997) chip.
>
> Signed-off-by: Xinming Hu <huxm@xxxxxxxxxxx>
> Signed-off-by: Amitkumar Karwar <akarwar@xxxxxxxxxxx>
> ---
[...]
> diff --git a/Documentation/devicetree/bindings/net/marvell-bt-sd8xxx.txt b/Documentation/devicetree/bindings/net/marvell-bt-sd8xxx.txt
> new file mode 100644
> index 0000000..172ba83
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/net/marvell-bt-sd8xxx.txt
> @@ -0,0 +1,57 @@
> +Marvell 8897/8997 (sd8897/sd8997) bluetooth SDIO devices
> +------
> +
> +Required properties:
> +
> + - compatible : should be one of the following:
> + * "marvell,sd8897-bt"
> + * "marvell,sd8997-bt"
> +
> +Optional properties:
> +
> + - btmrvl,cal-data : Calibration data downloaded to the device during
> + initialization. This is an array of 28 values(u8).
btmrvl is not a vendor. These should all be "marvell".
> +
> + - btmrvl,wakeup-pin : 'wakeup-pin' represent wakeup pin number of the bluetooth
> + chip. firmware will use the pin to wakeup host system.
> + - btmrvl,wakeup-gap : wakeup gap (in msecs) represent wakeup latency of the host
Add units suffix (-msec).
> + platform. The value will be configure to fiwmware.
s/fiwmware/firmware/
> + This is needed to work chip's sleep feature as expected.
> + - interrupt-parent: phandle of the parent interrupt controller
> + - interrupts : interrupt pin number to the cpu. driver will request an irq based on
> + this interrupt number. during system suspend, the irq will be enabled
> + as system wakeup source, so that the bluetooth chip can wakeup host
> + platform under certain condition. during system resume, the irq will
> + be disabled to make sure unnecessary interrupt is not received.
> +
> +Example:
> +
> +IRQ pin 119 is used as system wakeup source interrupt.
> +wakeup pin 13 and gap 100ms are configured so that firmware can wakeup host
> +using this device side pin and wakeup latency.
> +calibration data is also available in below example.
> +
> +&mmc3 {
> + status = "okay";
> + vmmc-supply = <&wlan_en_reg>;
> + bus-width = <4>;
> + cap-power-off-card;
> + keep-power-in-suspend;
> +
> + #address-cells = <1>;
> + #size-cells = <0>;
> + btmrvl: btmrvl@2 {
Use a generic node name: bluetooth@2
> + compatible = "marvell,sd8897-bt";
> + reg = <2>;
> + interrupt-parent = <&pio>;
> + interrupts = <119 IRQ_TYPE_LEVEL_LOW>;
> +
> + btmrvl,cal-data = /bits/ 8 <
> + 0x37 0x01 0x1c 0x00 0xff 0xff 0xff 0xff 0x01 0x7f 0x04 0x02
> + 0x00 0x00 0xba 0xce 0xc0 0xc6 0x2d 0x00 0x00 0x00 0x00 0x00
> + 0x00 0x00 0xf0 0x00>;
> + btmrvl,wakeup-pin = <0x0d>;
> + btmrvl,wakeup-gap = <0x64>;
> + };
> +};
> +
> --
> 1.8.1.4
>
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