From: Alexandre Belloni <alexandre.belloni@bootlin.com>
To: Kamel Bouhara <kamel.bouhara@bootlin.com>,
Wolfram Sang <wsa@the-dreams.de>,
linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org,
Nicolas Ferre <nicolas.ferre@microchip.com>,
linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org,
Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Subject: Re: [PATCH 2/4] i2c: at91: implement i2c bus recovery
Date: Wed, 9 Oct 2019 16:01:45 +0200 [thread overview]
Message-ID: <20191009140145.GE4254@piout.net> (raw)
In-Reply-To: <20191009135500.ufkxcemccwfcfys7@M43218.corp.atmel.com>
On 09/10/2019 15:55:00+0200, Ludovic Desroches wrote:
> On Wed, Oct 02, 2019 at 04:46:56PM +0200, Kamel Bouhara wrote:
> > External E-Mail
> >
> >
> > Implement i2c bus recovery when slaves devices might hold SDA low.
> > In this case re-assign SCL/SDA to gpios and issue 9 dummy clock pulses
> > until the slave release SDA.
> >
>
> Hi Kamel,
>
> Thanks for adding this new feature. As I see patches only for sama5d3 and
> sama5d4, I assume it has not been tested with a sama5d2, isn't it?
>
I there a point having it on sama5d2 as the controller already supports
this feature?
> I doubt it works with a sama5d2 because of the pinctrl. I also wonder if it can
> work if we add .strict = true to pinmux_ops which is something plan for the
> future...
>
I don't see why it wouldn't work with strict as this is switching muxing
properly instead of using the pins for two functions at the same time.
--
Alexandre Belloni, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com
next prev parent reply other threads:[~2019-10-09 14:01 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-02 14:46 [PATCH 0/4] i2c bus recovery for Microchip SoCs Kamel Bouhara
2019-10-02 14:46 ` [PATCH 1/4] dt-bindings: i2c: at91: document optional bus recovery properties Kamel Bouhara
2019-10-02 14:46 ` [PATCH 2/4] i2c: at91: implement i2c bus recovery Kamel Bouhara
2019-10-04 9:35 ` Claudiu.Beznea
2019-10-04 20:39 ` Uwe Kleine-König
2019-10-07 10:17 ` Claudiu.Beznea
2019-10-09 13:55 ` Ludovic Desroches
2019-10-09 14:01 ` Alexandre Belloni [this message]
2019-10-10 6:54 ` Ludovic Desroches
2019-10-21 20:20 ` Wolfram Sang
[not found] ` <724d3470-0561-1b3f-c826-bc16c74a8c0a@bootlin.com>
2019-10-24 14:08 ` Codrin.Ciubotariu
2019-10-24 15:07 ` Wolfram Sang
2019-10-25 1:14 ` Phil Reid
2020-08-25 13:28 ` Wolfram Sang
2020-08-25 23:44 ` Phil Reid
2019-10-02 14:46 ` [PATCH 3/4] ARM: at91/dt: sama5d3: add i2c gpio pinctrl Kamel Bouhara
2019-10-02 14:46 ` [PATCH 4/4] ARM: at91/dt: sama5d4: " Kamel Bouhara
2019-10-15 19:10 ` [PATCH 0/4] i2c bus recovery for Microchip SoCs Rob Herring
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