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: Amitkumar Karwar <akarwar@xxxxxxxxxxx>
Signed-off-by: Cathy Luo <cluo@xxxxxxxxxxx>
Signed-off-by: Avinash Patil <patila@xxxxxxxxxxx>
---
Documentation/devicetree/bindings/btmrvl.txt | 22 ++++++++++++++++++++
drivers/bluetooth/btmrvl_main.c | 31 +++++++++++++---------------
2 files changed, 36 insertions(+), 17 deletions(-)
create mode 100644 Documentation/devicetree/bindings/btmrvl.txt
diff --git a/Documentation/devicetree/bindings/btmrvl.txt b/Documentation/devicetree/bindings/btmrvl.txt
new file mode 100644
index 0000000..cdd5768
--- /dev/null
+++ b/Documentation/devicetree/bindings/btmrvl.txt
@@ -0,0 +1,22 @@
+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>;
+};
diff --git a/drivers/bluetooth/btmrvl_main.c b/drivers/bluetooth/btmrvl_main.c
index 1d7db20..2909bca 100644
--- a/drivers/bluetooth/btmrvl_main.c
+++ b/drivers/bluetooth/btmrvl_main.c
@@ -496,25 +496,22 @@ 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,
- 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);
- if (ret) {
- BT_ERR("Fail to download calibrate data");
- return ret;
+ 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);
+ if (ret) {
+ BT_ERR("Fail to download calibrate data");
+ return ret;
+ }
}
return 0;
--
1.8.1.4
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