[PATCH 0/3] ARM: dts: rockchip: Use hci_bcm driver for bcm43540 on Veyron devices

[PATCH 0/3] ARM: dts: rockchip: Use hci_bcm driver for bcm43540 on Veyron devices

[Abhishek Pandit-Subedi]

This patch series enables using the Broadcom HCI UART driver with the
BCM43540 Wi-Fi + Bluetooth chip. This chip is used on a RK3288 based
board (Veyron) and these changes have been tested on the Minnie variant
of the board (i.e. rk3288-veyron-minnie.dts).



Abhishek Pandit-Subedi (3):
  Bluetooth: hci_bcm: Add compatible string for BCM43540
  dt-bindings: net: broadcom-bluetooth: Add BCM43540 compatible string
  ARM: dts: rockchip: Add brcm bluetooth module on uart0

 .../bindings/net/broadcom-bluetooth.txt       |  1 +
 arch/arm/boot/dts/rk3288-veyron.dtsi          | 31 +++++--------------
 drivers/bluetooth/hci_bcm.c                   |  1 +
 3 files changed, 9 insertions(+), 24 deletions(-)

-- 
2.24.0.rc0.303.g954a862665-goog

[PATCH 2/3] dt-bindings: net: broadcom-bluetooth: Add BCM43540 compatible string

[Abhishek Pandit-Subedi]

The BCM43540 is a 802.11 a/b/g/n/ac WiFi + Bluetooth 4.1 chip from
Broadcom. This is present in Azurewave AW-CM195NF WiFi+BT module.

Signed-off-by: Abhishek Pandit-Subedi <abhishekpandit@chromium.org>
---

 Documentation/devicetree/bindings/net/broadcom-bluetooth.txt | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/net/broadcom-bluetooth.txt b/Documentation/devicetree/bindings/net/broadcom-bluetooth.txt
index 4fa00e2eafcf..c749dc297624 100644
--- a/Documentation/devicetree/bindings/net/broadcom-bluetooth.txt
+++ b/Documentation/devicetree/bindings/net/broadcom-bluetooth.txt
@@ -14,6 +14,7 @@ Required properties:
    * "brcm,bcm4330-bt"
    * "brcm,bcm43438-bt"
    * "brcm,bcm4345c5"
+   * "brcm,bcm43540-bt"
 
 Optional properties:
 
-- 
2.24.0.rc0.303.g954a862665-goog

[PATCH 3/3] ARM: dts: rockchip: Add brcm bluetooth module on uart0

[Abhishek Pandit-Subedi]

This enables the Broadcom uart bluetooth driver on uart0 and gives it
ownership of its gpios. In order to use this, you must enable the
following kconfig options:
  - CONFIG_BT_HCIUART_BCM
  - CONFIG_SERIAL_DEV

Signed-off-by: Abhishek Pandit-Subedi <abhishekpandit@chromium.org>
---

 arch/arm/boot/dts/rk3288-veyron.dtsi | 31 +++++++---------------------
 1 file changed, 7 insertions(+), 24 deletions(-)

diff --git a/arch/arm/boot/dts/rk3288-veyron.dtsi b/arch/arm/boot/dts/rk3288-veyron.dtsi
index 7525e3dd1fc1..8c9f91ba6f57 100644
--- a/arch/arm/boot/dts/rk3288-veyron.dtsi
+++ b/arch/arm/boot/dts/rk3288-veyron.dtsi
@@ -23,30 +23,6 @@
 		reg = <0x0 0x0 0x0 0x80000000>;
 	};
 
-	bt_activity: bt-activity {
-		compatible = "gpio-keys";
-		pinctrl-names = "default";
-		pinctrl-0 = <&bt_host_wake>;
-
-		/*
-		 * HACK: until we have an LPM driver, we'll use an
-		 * ugly GPIO key to allow Bluetooth to wake from S3.
-		 * This is expected to only be used by BT modules that
-		 * use UART for comms.  For BT modules that talk over
-		 * SDIO we should use a wakeup mechanism related to SDIO.
-		 *
-		 * Use KEY_RESERVED here since that will work as a wakeup but
-		 * doesn't get reported to higher levels (so doesn't confuse
-		 * Chrome).
-		 */
-		bt-wake {
-			label = "BT Wakeup";
-			gpios = <&gpio4 RK_PD7 GPIO_ACTIVE_HIGH>;
-			linux,code = <KEY_RESERVED>;
-			wakeup-source;
-		};
-
-	};
 
 	power_button: power-button {
 		compatible = "gpio-keys";
@@ -434,6 +410,13 @@
 	/* Pins don't include flow control by default; add that in */
 	pinctrl-names = "default";
 	pinctrl-0 = <&uart0_xfer &uart0_cts &uart0_rts>;
+
+	bluetooth {
+		compatible = "brcm,bcm43540-bt";
+		host-wakeup-gpios	= <&gpio4 RK_PD7 GPIO_ACTIVE_HIGH>;
+		shutdown-gpios		= <&gpio4 RK_PD5 GPIO_ACTIVE_LOW>;
+		device-wakeup-gpios	= <&gpio4 RK_PD2 GPIO_ACTIVE_HIGH>;
+	};
 };
 
 &uart1 {
-- 
2.24.0.rc0.303.g954a862665-goog

Re: [PATCH 3/3] ARM: dts: rockchip: Add brcm bluetooth module on uart0

[Doug Anderson]

Hi,

On Fri, Oct 25, 2019 at 2:55 PM Abhishek Pandit-Subedi
<abhishekpandit@chromium.org> wrote:
>
> This enables the Broadcom uart bluetooth driver on uart0 and gives it
> ownership of its gpios. In order to use this, you must enable the
> following kconfig options:
>   - CONFIG_BT_HCIUART_BCM
>   - CONFIG_SERIAL_DEV
>
> Signed-off-by: Abhishek Pandit-Subedi <abhishekpandit@chromium.org>
> ---
>
>  arch/arm/boot/dts/rk3288-veyron.dtsi | 31 +++++++---------------------
>  1 file changed, 7 insertions(+), 24 deletions(-)
>
> diff --git a/arch/arm/boot/dts/rk3288-veyron.dtsi b/arch/arm/boot/dts/rk3288-veyron.dtsi
> index 7525e3dd1fc1..8c9f91ba6f57 100644
> --- a/arch/arm/boot/dts/rk3288-veyron.dtsi
> +++ b/arch/arm/boot/dts/rk3288-veyron.dtsi

You are changing this for _all_ veryon, not just those veyron devices
using Broadcom.  I don't think you want to change the marvell-based
boards.

...presumably you'll want to make you change only affect minnie,
speedy, and mickey.


> @@ -23,30 +23,6 @@
>                 reg = <0x0 0x0 0x0 0x80000000>;
>         };
>
> -       bt_activity: bt-activity {
> -               compatible = "gpio-keys";
> -               pinctrl-names = "default";
> -               pinctrl-0 = <&bt_host_wake>;
> -
> -               /*
> -                * HACK: until we have an LPM driver, we'll use an
> -                * ugly GPIO key to allow Bluetooth to wake from S3.
> -                * This is expected to only be used by BT modules that
> -                * use UART for comms.  For BT modules that talk over
> -                * SDIO we should use a wakeup mechanism related to SDIO.
> -                *
> -                * Use KEY_RESERVED here since that will work as a wakeup but
> -                * doesn't get reported to higher levels (so doesn't confuse
> -                * Chrome).
> -                */
> -               bt-wake {
> -                       label = "BT Wakeup";
> -                       gpios = <&gpio4 RK_PD7 GPIO_ACTIVE_HIGH>;
> -                       linux,code = <KEY_RESERVED>;
> -                       wakeup-source;
> -               };
> -
> -       };
>
>         power_button: power-button {
>                 compatible = "gpio-keys";
> @@ -434,6 +410,13 @@
>         /* Pins don't include flow control by default; add that in */
>         pinctrl-names = "default";
>         pinctrl-0 = <&uart0_xfer &uart0_cts &uart0_rts>;
> +
> +       bluetooth {
> +               compatible = "brcm,bcm43540-bt";

You probably need some pinctrl entries here to make sure that things
are properly configured, like:

pinctrl-names = "default";
pinctrl-0 = <&bt_host_wake>, <&bt_dev_wake>, <&bt_enable>;

This would require defining bt_dev_wake and bt_enable and removing the
hacky output-only versions they have now.


> +               host-wakeup-gpios       = <&gpio4 RK_PD7 GPIO_ACTIVE_HIGH>;
> +               shutdown-gpios          = <&gpio4 RK_PD5 GPIO_ACTIVE_LOW>;

Right now gpio4 RK_PD5 is controlled by the "sdio_pwrseq".  Should you
remove it from there?  Looks like it was a no-op for marvell which
makes it a little easier.


> +               device-wakeup-gpios     = <&gpio4 RK_PD2 GPIO_ACTIVE_HIGH>;

You probably need to stop driving this in the pinctrl hogs for
Broadcom boards...


-Doug

Re: [PATCH 3/3] ARM: dts: rockchip: Add brcm bluetooth module on uart0

[Abhishek Pandit-Subedi]

Yes, these shouldn't be for all of Veyron, only Minnie, Mickey and
Speedy -- my mistake. I'll send an updated patch with your
suggestions.

Thanks
Abhishek

On Fri, Oct 25, 2019 at 3:50 PM Doug Anderson <dianders@chromium.org> wrote:
>
> Hi,
>
> On Fri, Oct 25, 2019 at 2:55 PM Abhishek Pandit-Subedi
> <abhishekpandit@chromium.org> wrote:
> >
> > This enables the Broadcom uart bluetooth driver on uart0 and gives it
> > ownership of its gpios. In order to use this, you must enable the
> > following kconfig options:
> >   - CONFIG_BT_HCIUART_BCM
> >   - CONFIG_SERIAL_DEV
> >
> > Signed-off-by: Abhishek Pandit-Subedi <abhishekpandit@chromium.org>
> > ---
> >
> >  arch/arm/boot/dts/rk3288-veyron.dtsi | 31 +++++++---------------------
> >  1 file changed, 7 insertions(+), 24 deletions(-)
> >
> > diff --git a/arch/arm/boot/dts/rk3288-veyron.dtsi b/arch/arm/boot/dts/rk3288-veyron.dtsi
> > index 7525e3dd1fc1..8c9f91ba6f57 100644
> > --- a/arch/arm/boot/dts/rk3288-veyron.dtsi
> > +++ b/arch/arm/boot/dts/rk3288-veyron.dtsi
>
> You are changing this for _all_ veryon, not just those veyron devices
> using Broadcom.  I don't think you want to change the marvell-based
> boards.
>
> ...presumably you'll want to make you change only affect minnie,
> speedy, and mickey.
>
>
> > @@ -23,30 +23,6 @@
> >                 reg = <0x0 0x0 0x0 0x80000000>;
> >         };
> >
> > -       bt_activity: bt-activity {
> > -               compatible = "gpio-keys";
> > -               pinctrl-names = "default";
> > -               pinctrl-0 = <&bt_host_wake>;
> > -
> > -               /*
> > -                * HACK: until we have an LPM driver, we'll use an
> > -                * ugly GPIO key to allow Bluetooth to wake from S3.
> > -                * This is expected to only be used by BT modules that
> > -                * use UART for comms.  For BT modules that talk over
> > -                * SDIO we should use a wakeup mechanism related to SDIO.
> > -                *
> > -                * Use KEY_RESERVED here since that will work as a wakeup but
> > -                * doesn't get reported to higher levels (so doesn't confuse
> > -                * Chrome).
> > -                */
> > -               bt-wake {
> > -                       label = "BT Wakeup";
> > -                       gpios = <&gpio4 RK_PD7 GPIO_ACTIVE_HIGH>;
> > -                       linux,code = <KEY_RESERVED>;
> > -                       wakeup-source;
> > -               };
> > -
> > -       };
> >
> >         power_button: power-button {
> >                 compatible = "gpio-keys";
> > @@ -434,6 +410,13 @@
> >         /* Pins don't include flow control by default; add that in */
> >         pinctrl-names = "default";
> >         pinctrl-0 = <&uart0_xfer &uart0_cts &uart0_rts>;
> > +
> > +       bluetooth {
> > +               compatible = "brcm,bcm43540-bt";
>
> You probably need some pinctrl entries here to make sure that things
> are properly configured, like:
>
> pinctrl-names = "default";
> pinctrl-0 = <&bt_host_wake>, <&bt_dev_wake>, <&bt_enable>;
>
> This would require defining bt_dev_wake and bt_enable and removing the
> hacky output-only versions they have now.
>
>
> > +               host-wakeup-gpios       = <&gpio4 RK_PD7 GPIO_ACTIVE_HIGH>;
> > +               shutdown-gpios          = <&gpio4 RK_PD5 GPIO_ACTIVE_LOW>;
>
> Right now gpio4 RK_PD5 is controlled by the "sdio_pwrseq".  Should you
> remove it from there?  Looks like it was a no-op for marvell which
> makes it a little easier.
>
>
> > +               device-wakeup-gpios     = <&gpio4 RK_PD2 GPIO_ACTIVE_HIGH>;
>
> You probably need to stop driving this in the pinctrl hogs for
> Broadcom boards...
>
>
> -Doug

Re: [PATCH 0/3] ARM: dts: rockchip: Use hci_bcm driver for bcm43540 on Veyron devices

[Marcel Holtmann]

Hi Abhishek,

> This patch series enables using the Broadcom HCI UART driver with the
> BCM43540 Wi-Fi + Bluetooth chip. This chip is used on a RK3288 based
> board (Veyron) and these changes have been tested on the Minnie variant
> of the board (i.e. rk3288-veyron-minnie.dts).
> 
> 
> 
> Abhishek Pandit-Subedi (3):
>  Bluetooth: hci_bcm: Add compatible string for BCM43540
>  dt-bindings: net: broadcom-bluetooth: Add BCM43540 compatible string
>  ARM: dts: rockchip: Add brcm bluetooth module on uart0
> 
> .../bindings/net/broadcom-bluetooth.txt       |  1 +
> arch/arm/boot/dts/rk3288-veyron.dtsi          | 31 +++++--------------
> drivers/bluetooth/hci_bcm.c                   |  1 +
> 3 files changed, 9 insertions(+), 24 deletions(-)

patches 1 and 2 have been applied to bluetooth-next tree. I leave patch 3 to the appropriate ARM maintainer to pick up.

Regards

Marcel