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Commit 098ea6bc authored by Amitkumar Karwar's avatar Amitkumar Karwar Committed by Marcel Holtmann
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Bluetooth: btmrvl: add DT bindings documentation 



Calibration data can be downloaded through device tree method. This
patch adds the documentation. Also, instead of searching device tree
node by name using of_find_node_by_name() API, let's use
for_each_compatible_node().

Signed-off-by: default avatarAmitkumar Karwar <akarwar@marvell.com>
Signed-off-by: default avatarCathy Luo <cluo@marvell.com>
Signed-off-by: default avatarAvinash Patil <patila@marvell.com>
Signed-off-by: default avatarMarcel Holtmann <marcel@holtmann.org>
parent 0378b597

Documentation/devicetree/bindings/btmrvl.txt

0 → 100644
+22 −0
Original line number Diff line number Diff line 
btmrvl

------



Required properties:



  - compatible : must be "btmrvl,cfgdata"



Optional properties:



  - btmrvl,cal-data : Calibration data downloaded to the device during

		      initialization. This is an array of 28 values(u8).



Example:



btmrvl {

	compatible = "btmrvl,cfgdata";



	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>;

};

drivers/bluetooth/btmrvl_main.c

+14 −17
Original line number Diff line number Diff line
@@ -496,26 +496,23 @@ static int btmrvl_cal_data_dt(struct btmrvl_private *priv) 
{

	struct device_node *dt_node;

	u8 cal_data[BT_CAL_HDR_LEN + BT_CAL_DATA_SIZE];

	const char name[] = "btmrvl_caldata";

	const char property[] = "btmrvl,caldata";

	int ret;



	dt_node = of_find_node_by_name(NULL, name);

	if (!dt_node)

		return -ENODEV;



	ret = of_property_read_u8_array(dt_node, property,

	for_each_compatible_node(dt_node, NULL, "btmrvl,cfgdata") {

		ret = of_property_read_u8_array(dt_node, "btmrvl,cal-data",

						cal_data + BT_CAL_HDR_LEN,

						BT_CAL_DATA_SIZE);

		if (ret)

			return ret;



		BT_DBG("Use cal data from device tree");

	ret = btmrvl_download_cal_data(priv, cal_data, BT_CAL_DATA_SIZE);

		ret = btmrvl_download_cal_data(priv, cal_data,

					       BT_CAL_DATA_SIZE);

		if (ret) {

			BT_ERR("Fail to download calibrate data");

			return ret;

		}

	}



	return 0;

}