From: Stefan Wahren <wahrenst@gmx.net>
To: Marcel Holtmann <marcel@holtmann.org>,
Johan Hedberg <johan.hedberg@gmail.com>,
Florian Fainelli <f.fainelli@gmail.com>,
Ray Jui <rjui@broadcom.com>,
Scott Branden <sbranden@broadcom.com>
Cc: Mark Rutland <mark.rutland@arm.com>,
devicetree@vger.kernel.org, linux-bluetooth@vger.kernel.org,
Catalin Marinas <catalin.marinas@arm.com>,
Eric Anholt <eric@anholt.net>, Rob Herring <robh+dt@kernel.org>,
bcm-kernel-feedback-list@broadcom.com,
Will Deacon <will@kernel.org>,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH V4 01/10] bluetooth: hci_bcm: Fix RTS handling during startup
Date: Sun, 20 Oct 2019 23:17:28 +0200 [thread overview]
Message-ID: <61789264-a4c2-ac85-9d74-d186213ec70a@gmx.net> (raw)
In-Reply-To: <1570375708-26965-2-git-send-email-wahrenst@gmx.net>
Hi Marcel,
hi Johan,
Am 06.10.19 um 17:28 schrieb Stefan Wahren:
> The RPi 4 uses the hardware handshake lines for CYW43455, but the chip
> doesn't react to HCI requests during DT probe. The reason is the inproper
> handling of the RTS line during startup. According to the startup
> signaling sequence in the CYW43455 datasheet, the hosts RTS line must
> be driven after BT_REG_ON and BT_HOST_WAKE.
>
> Signed-off-by: Stefan Wahren <wahrenst@gmx.net>
> ---
> drivers/bluetooth/hci_bcm.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/drivers/bluetooth/hci_bcm.c b/drivers/bluetooth/hci_bcm.c
> index 7646636..0f73f6a 100644
> --- a/drivers/bluetooth/hci_bcm.c
> +++ b/drivers/bluetooth/hci_bcm.c
> @@ -445,9 +445,11 @@ static int bcm_open(struct hci_uart *hu)
>
> out:
> if (bcm->dev) {
> + hci_uart_set_flow_control(hu, true);
> hu->init_speed = bcm->dev->init_speed;
> hu->oper_speed = bcm->dev->oper_speed;
> err = bcm_gpio_set_power(bcm->dev, true);
> + hci_uart_set_flow_control(hu, false);
> if (err)
> goto err_unset_hu;
> }
> --
> 2.7.4
would be nice to get some feedback about this.
Regards
Stefan
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next prev parent reply other threads:[~2019-10-20 21:23 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-06 15:28 [PATCH V4 00/10] ARM: Add minimal Raspberry Pi 4 support Stefan Wahren
2019-10-06 15:28 ` [PATCH V4 01/10] bluetooth: hci_bcm: Fix RTS handling during startup Stefan Wahren
2019-10-20 21:17 ` Stefan Wahren [this message]
2019-12-16 13:25 ` Ondřej Jirman
2019-12-16 18:28 ` Stefan Wahren
2019-12-16 19:42 ` Ondřej Jirman
2019-12-16 19:56 ` Stefan Wahren
2019-12-17 12:59 ` Stefan Wahren
2019-12-17 13:41 ` Ondřej Jirman
2019-12-19 19:54 ` Marcel Holtmann
2019-10-21 15:05 ` Marcel Holtmann
2019-10-06 15:28 ` [PATCH V4 02/10] ARM: dts: bcm283x: Remove simple-bus from fixed clocks Stefan Wahren
2019-10-06 15:28 ` [PATCH V4 03/10] ARM: dts: bcm283x: Remove brcm, bcm2835-pl011 compatible Stefan Wahren
2019-10-06 15:28 ` [PATCH V4 04/10] ARM: dts: bcm283x: Move BCM2835/6/7 specific to bcm2835-common.dtsi Stefan Wahren
2019-10-06 15:28 ` [PATCH V4 05/10] dt-bindings: arm: Convert BCM2835 board/soc bindings to json-schema Stefan Wahren
2019-10-06 15:28 ` [PATCH V4 06/10] dt-bindings: arm: bcm2835: Add Raspberry Pi 4 to DT schema Stefan Wahren
2019-10-06 15:28 ` [PATCH V4 07/10] ARM: bcm: Add support for BCM2711 SoC Stefan Wahren
2019-10-06 15:28 ` [PATCH V4 08/10] ARM: dts: Add minimal Raspberry Pi 4 support Stefan Wahren
2019-10-06 15:28 ` [PATCH V4 09/10] arm64: dts: broadcom: Add reference to RPi 4 B Stefan Wahren
2019-10-06 15:28 ` [PATCH V4 10/10] MAINTAINERS: Add BCM2711 to BCM2835 ARCH Stefan Wahren
2019-10-07 10:07 ` [PATCH V4 00/10] ARM: Add minimal Raspberry Pi 4 support Matthias Brugger
2019-10-11 14:46 ` Stefan Wahren
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