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Subject: Re: [PATCH V4 01/10] bluetooth: hci_bcm: Fix RTS handling during
 startup
From:   Marcel Holtmann <marcel@holtmann.org>
In-Reply-To: <1570375708-26965-2-git-send-email-wahrenst@gmx.net>
Date:   Mon, 21 Oct 2019 17:05:32 +0200
Cc:     Johan Hedberg <johan.hedberg@gmail.com>,
        Rob Herring <robh+dt@kernel.org>,
        Mark Rutland <mark.rutland@arm.com>,
        Eric Anholt <eric@anholt.net>,
        Florian Fainelli <f.fainelli@gmail.com>,
        Ray Jui <rjui@broadcom.com>,
        Scott Branden <sbranden@broadcom.com>,
        Catalin Marinas <catalin.marinas@arm.com>,
        Will Deacon <will@kernel.org>,
        bcm-kernel-feedback-list@broadcom.com,
        linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org,
        linux-bluetooth@vger.kernel.org
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References: <1570375708-26965-1-git-send-email-wahrenst@gmx.net>
 <1570375708-26965-2-git-send-email-wahrenst@gmx.net>
To:     Stefan Wahren <wahrenst@gmx.net>
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Hi Stefan,

> 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(+)

patch has been applied to bluetooth-next tree.

Regards

Marcel