samsung-golden uses a BCM4334 WiFi+BT combo chip.
The BT part is connected via UART and supported by the hci_bcm
driver in mainline.
Add the necessary device tree changes to make it load correctly.
It requires (seemingly) device-specific firmware that can be
extracted from the stock Android system used on samsung-golden:
- /system/bin/bcm4334.hcd -> /lib/firmware/brcm/BCM4334B0.hcd
On my device, scanning for other Bluetooth devices works just fine,
but for some reason it keeps disconnecting immediately
when attempting to connect to an other device.
Signed-off-by: Stephan Gerhold <stephan@xxxxxxxxxxx>
---
.../arm/boot/dts/ste-ux500-samsung-golden.dts | 27 +++++++++++++++++++
1 file changed, 27 insertions(+)
diff --git a/arch/arm/boot/dts/ste-ux500-samsung-golden.dts b/arch/arm/boot/dts/ste-ux500-samsung-golden.dts
index d22b2879c46a..313f0ab16866 100644
--- a/arch/arm/boot/dts/ste-ux500-samsung-golden.dts
+++ b/arch/arm/boot/dts/ste-ux500-samsung-golden.dts
@@ -113,6 +113,19 @@ uart@80120000 {
pinctrl-names = "default", "sleep";
pinctrl-0 = <&u0_a_1_default>;
pinctrl-1 = <&u0_a_1_sleep>;
+
+ bluetooth {
+ compatible = "brcm,bcm4330-bt";
+ /* GPIO222 (BT_VREG_ON) */
+ shutdown-gpios = <&gpio6 30 GPIO_ACTIVE_HIGH>;
+ /* GPIO199 (BT_WAKE) */
+ device-wakeup-gpios = <&gpio6 7 GPIO_ACTIVE_HIGH>;
+ /* GPIO97 (BT_HOST_WAKE) */
+ host-wakeup-gpios = <&gpio3 1 GPIO_ACTIVE_HIGH>;
+
+ pinctrl-names = "default";
+ pinctrl-0 = <&bluetooth_default>;
+ };
};
/* GPF UART */
@@ -396,6 +409,20 @@ golden_cfg1 {
};
};
+ bluetooth {
+ bluetooth_default: bluetooth_default {
+ golden_cfg1 {
+ pins = "GPIO199_AH23", /* BT_WAKE */
+ "GPIO222_AJ9"; /* BT_VREG_ON */
+ ste,config = <&gpio_out_lo>;
+ };
+ golden_cfg2 {
+ pins = "GPIO97_D9"; /* BT_HOST_WAKE */
+ ste,config = <&gpio_in_nopull>;
+ };
+ };
+ };
+
vibrator {
vibrator_default: vibrator_default {
golden_cfg1 {
--
2.24.1
