Re: [RFC v4 1/4] Broadcom Bluetooth UART Device Tree bindings
From: Rob Herring <hidden>
Date: 2015-06-02 00:18:38
Also in:
linux-bluetooth
On Fri, May 22, 2015 at 3:10 PM, Ilya Faenson [off-list ref] wrote:
quoted hunk
Device Tree bindings to configure the Broadcom Bluetooth UART device. Signed-off-by: Ilya Faenson <ifaenson-dY08KVG/lbpWk0Htik3J/w@public.gmane.org> --- .../devicetree/bindings/net/bluetooth/btbcm.txt | 82 ++++++++++++++++++++++ 1 file changed, 82 insertions(+) create mode 100644 Documentation/devicetree/bindings/net/bluetooth/btbcm.txtdiff --git a/Documentation/devicetree/bindings/net/bluetooth/btbcm.txt b/Documentation/devicetree/bindings/net/bluetooth/btbcm.txt new file mode 100644 index 0000000..968421b --- /dev/null +++ b/Documentation/devicetree/bindings/net/bluetooth/btbcm.txt@@ -0,0 +1,82 @@ +btbcm +------ + +Required properties: + + - compatible : must be "brcm,brcm-bt-uart". + - tty : tty device connected to this Bluetooth device.
Neil Brown has been working on generic bindings for tty/UART slaves which should be used here.
+ +Optional properties: + + - bt-host-wake-gpios : bt-host-wake input GPIO to be used as an interrupt. + + - bt-wake-gpios : bt-wake output GPIO to be used to suspend / resume device. + + - bt-reg-on-gpios : reg-on output GPIO to be used to power device on/off. + + - baud-rate-before-config-download : initial Bluetooth device baud rate. + Default: 3000000.
What's the baudrate after download? Why not just use standard "baud-rate" if you only specify one rate?
+ + - manual-fc : flow control UART in suspend / resume scenarios. + Default: 0. + + - configure-sleep : configure suspend / resume flag. + Default: false. + + - configure-audio : configure platform PCM SCO flag. + Default: false. + + - PCMClockMode : PCM clock mode. 0-slave, 1-master. + Default: 0. + + - PCMFillMethod : PCM fill method. 0 to 3. + Default: 2. + + - PCMFillNum : PCM number of fill bits. 0 to 3. + Default: 0. + + - PCMFillValue : PCM fill value. 0 to 7. + Default: 3. + + - PCMInCallBitclock : PCM interface rate. 0-128Kbps, 1-256Kbps, 2-512Kbps, + 3-1024Kbps, 4-2048Kbps. + Default: 0. + + - PCMLSBFirst : PCM LSB first. 0 or 1. + Default: 0. + + - PCMRightJustify : PCM Justify. 0-left, 1-right. + Default: 0. + + - PCMRouting : PCM routing. 0-PCM, 1-SCO over HCI. + Default: 0. + + - PCMShortFrameSync : PCM sync. 0-short, 1-long. + Default: 0. + + - PCMSyncMode : PCM sync mode. 0-slave, 1-master.
Please no CamelCase. These need better descriptions.
+ Default: 0.
+
+
+Example:
+
+ brcm4354_bt_uart: brcm4354-bt-uart {
+ compatible = "brcm,brcm-bt-uart";
+ bt-wake-gpios = <&gpio4 30 GPIO_ACTIVE_HIGH>;
+ bt-host-wake-gpios = <&gpio4 31 GPIO_ACTIVE_HIGH>;
+ tty = "ttyS0";
+ baud-rate-before-config-download = <3000000>;
+ configure-sleep;
+ configure-audio;
+ PCMClockMode = <0>;
+ PCMFillMethod = <2>;
+ PCMFillNum = <0>;
+ PCMFillValue = <3>;
+ PCMInCallBitclock = <0>;
+ PCMLSBFirst = <0>;
+ PCMRightJustify = <0>;
+ PCMRouting = <0>;
+ PCMShortFrameSync = <0>;
+ PCMSyncMode = <0>;
+ };
+
--
1.9.1
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