From: khilman@baylibre•com (Kevin Hilman)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH 0/4] Bluetooth support for GXBB/GXL/GXM based devices
Date: Wed, 18 Jan 2017 14:02:06 -0800 [thread overview]
Message-ID: <m2fukgyqld.fsf@baylibre.com> (raw)
In-Reply-To: <CAFBinCC0RADEKnkYEF6_DkBTftdjmPMku+N3bdvZMCoqs96xGA@mail.gmail.com> (Martin Blumenstingl's message of "Wed, 18 Jan 2017 12:25:43 +0100")
Martin Blumenstingl <martin.blumenstingl@googlemail•com> writes:
> Kevin,
>
> On Sun, Jan 15, 2017 at 11:32 PM, Martin Blumenstingl
> <martin.blumenstingl@googlemail•com> wrote:
>> This adds the missing kernel bits for Bluetooth support on the
>> Tronsmart Vega S95 (GXBB based) boards as well as for the GXL
>> P230/P231 and GXM Q200/Q201 reference boards.
>>
>> The Bluetooth functionality on these boards is provided by the
>> SDIO wifi/Bluetooth combo-chip (Broadcom bcm43xx based). The
>> Bluetooth module on that combo-chip has to be taken out of reset,
>> which is taken care of the GPIO in the sdio_pwrseq.
>>
>> Once the module is taken out of reset it can be set up from userspace
>> using the "hciattach" tool from bluez, which talks to the Bluetooth
>> module which is connected to one of the serial ports (in our case
>> uart_A). To get the Bluetooth module initialized within the timeout
>> defined by "hciattach" (and to achieve usable speeds for Bluetooth
>> transfers) the communication uses a speed of 2000000 baud, which was
>> not supported by meson_uart before.
>>
>> NOTE: The .dts-changes from this series depends on my previous series
>> "add support for uart_AO_B" - see [0]
>>
>>
>> [0] http://lists.infradead.org/pipermail/linux-amlogic/2017-January/001982.html
>>
>>
>> Martin Blumenstingl (4):
>> tty: serial: meson: allow baud-rates higher than 115200
>> ARM64: dts: meson-gx: add the serial CTS and RTS pin groups
>
> Neil just informed me that Rob Herring is working on defining the UART
> Bluetooth device properly using devicetree (preparation for this is
> named "[PATCH v2 0/9] Serial slave device bus", see [0] for the
> mailing-list conversation and [1] for a WiP git repo).
Ah, good news. I knew Rob had been talking about that for awhile, so
I'm glad to see it coming into existence. Thanks for the pointers.
> This means that there will be a better solution than the one proposed
> in the meson-gx-p23x-q20x and meson-gxbb-vega-s95 patches (patches #1
> and #2 are not affected by this),> namely:
> - I'm currently (ab)using sdio-pwrseq node to power on the UART
> Bluetooth module, this can solved by specifying a bluetooth { } node
> inside the &uart_A node in the future and providing the corresponding
> GPIOs there
Good. I didn't like the (ab)use of sdio_pwrseq GPIO resets for the
bluetooth either.
> - all the userspace commands will not be necessary once
> drivers/bluetooth/hci_bcm.c is changed to the serio framework and gets
> devicetree support
Cool. Maybe you can setup a WIP branch based on Rob's work for broader
testing on Amlogic boards until this gets merged?
In the mean time, I've applied patch 2/4 and hopefully the drivers/tty
patch will go through the serial tree.
Kevin
next prev parent reply other threads:[~2017-01-18 22:02 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-15 22:32 [PATCH 0/4] Bluetooth support for GXBB/GXL/GXM based devices Martin Blumenstingl
2017-01-15 22:32 ` [PATCH 1/4] tty: serial: meson: allow baud-rates higher than 115200 Martin Blumenstingl
2017-01-15 22:48 ` Andreas Färber
2017-01-18 21:44 ` Kevin Hilman
2017-01-15 22:32 ` [PATCH 2/4] ARM64: dts: meson-gx: add the serial CTS and RTS pin groups Martin Blumenstingl
2017-01-15 22:50 ` Andreas Färber
2017-01-18 21:52 ` Kevin Hilman
2017-01-15 22:32 ` [PATCH 3/4] ARM64: dts: meson-gx-p23x-q20x: enable the Bluetooth module Martin Blumenstingl
2017-01-16 0:47 ` Andreas Färber
2017-01-16 9:44 ` Martin Blumenstingl
2017-01-15 22:32 ` [PATCH 4/4] ARM64: dts: meson-gxbb-vega-s95: " Martin Blumenstingl
2017-01-15 22:55 ` Andreas Färber
2017-01-18 11:25 ` [PATCH 0/4] Bluetooth support for GXBB/GXL/GXM based devices Martin Blumenstingl
2017-01-18 22:02 ` Kevin Hilman [this message]
2017-01-19 13:39 ` Greg KH
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