From: <Codrin.Ciubotariu@microchip.com>
To: <wsa@kernel.org>
Cc: <linux-i2c@vger.kernel.org>, <devicetree@vger.kernel.org>,
<linux-kernel@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>, <robh+dt@kernel.org>,
<Ludovic.Desroches@microchip.com>, <Nicolas.Ferre@microchip.com>,
<alexandre.belloni@bootlin.com>, <linux@armlinux.org.uk>,
<kamel.bouhara@bootlin.com>
Subject: Re: Re: Re: [RFC PATCH 4/4] i2c: at91: Move to generic GPIO bus recovery
Date: Fri, 4 Sep 2020 08:55:30 +0000 [thread overview]
Message-ID: <15466c95-f1ea-63a4-1429-24d9b7567c1c@microchip.com> (raw)
In-Reply-To: <20200826061444.GB1081@ninjato>
On 26.08.2020 09:14, Wolfram Sang wrote:
>
>> Thanks, this would be great! I tested this on a sam9x60, with the HW
>> feature for the 9 pulses disabled, with a picky audio codec as I2C device.
>> Please let me know of the result.
>
> I can't make use of the feature on the platform I had in mind, sadly. It
> doesn't really support switching from/to GPIO pinctrl states. If that
> ever changes, I will add bus recovery for that controller, but I think
> this is low priority.
The pinmux driver needs to have strict set to false, otherwise the
switching is not available, not at this time at least. Perhaps there is
room for improvement here, because the I2C bus is not using the pins
while we are doing GPIO recovery.
>
> On the good side, there are patches which make i2c-mv64xxx another user
> of your new mechanism, so everything is well, I think.
>
I saw them, I will try to take a look.
I am not sure I'll have time the next week to work on what you asked me
regarding sh_mobile and PXA, but I will look into it the week after that.
Sorry about my delayed reply, I was on vacation.
Best regards,
Codrin
WARNING: multiple messages have this Message-ID (diff)
From: <Codrin.Ciubotariu@microchip.com>
To: <wsa@kernel.org>
Cc: devicetree@vger.kernel.org, alexandre.belloni@bootlin.com,
kamel.bouhara@bootlin.com, linux-kernel@vger.kernel.org,
Ludovic.Desroches@microchip.com, robh+dt@kernel.org,
linux-i2c@vger.kernel.org, linux@armlinux.org.uk,
linux-arm-kernel@lists.infradead.org
Subject: Re: Re: Re: [RFC PATCH 4/4] i2c: at91: Move to generic GPIO bus recovery
Date: Fri, 4 Sep 2020 08:55:30 +0000 [thread overview]
Message-ID: <15466c95-f1ea-63a4-1429-24d9b7567c1c@microchip.com> (raw)
In-Reply-To: <20200826061444.GB1081@ninjato>
On 26.08.2020 09:14, Wolfram Sang wrote:
>
>> Thanks, this would be great! I tested this on a sam9x60, with the HW
>> feature for the 9 pulses disabled, with a picky audio codec as I2C device.
>> Please let me know of the result.
>
> I can't make use of the feature on the platform I had in mind, sadly. It
> doesn't really support switching from/to GPIO pinctrl states. If that
> ever changes, I will add bus recovery for that controller, but I think
> this is low priority.
The pinmux driver needs to have strict set to false, otherwise the
switching is not available, not at this time at least. Perhaps there is
room for improvement here, because the I2C bus is not using the pins
while we are doing GPIO recovery.
>
> On the good side, there are patches which make i2c-mv64xxx another user
> of your new mechanism, so everything is well, I think.
>
I saw them, I will try to take a look.
I am not sure I'll have time the next week to work on what you asked me
regarding sh_mobile and PXA, but I will look into it the week after that.
Sorry about my delayed reply, I was on vacation.
Best regards,
Codrin
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next prev parent reply other threads:[~2020-09-04 8:55 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-19 14:19 [RFC PATCH 0/4] i2c: core: add generic GPIO bus recovery Codrin Ciubotariu
2020-06-19 14:19 ` Codrin Ciubotariu
2020-06-19 14:19 ` [RFC PATCH 1/4] dt-binding: i2c: add generic properties for " Codrin Ciubotariu
2020-06-19 14:19 ` Codrin Ciubotariu
2020-07-05 21:19 ` Wolfram Sang
2020-07-05 21:19 ` Wolfram Sang
2020-07-24 19:39 ` Wolfram Sang
2020-07-24 19:39 ` Wolfram Sang
2020-07-24 20:52 ` Russell King - ARM Linux admin
2020-07-24 20:52 ` Russell King - ARM Linux admin
2020-07-27 10:44 ` Codrin.Ciubotariu
2020-07-27 10:44 ` Codrin.Ciubotariu
2020-07-27 10:50 ` Russell King - ARM Linux admin
2020-07-27 10:50 ` Russell King - ARM Linux admin
2020-07-30 9:00 ` Codrin.Ciubotariu
2020-07-30 9:00 ` Codrin.Ciubotariu
2020-08-03 14:16 ` Russell King - ARM Linux admin
2020-08-03 14:16 ` Russell King - ARM Linux admin
2020-08-03 16:42 ` Codrin.Ciubotariu
2020-08-03 16:42 ` Codrin.Ciubotariu
2020-07-15 19:21 ` Rob Herring
2020-07-15 19:21 ` Rob Herring
2020-06-19 14:19 ` [RFC PATCH 2/4] i2c: core: add generic I2C GPIO recovery Codrin Ciubotariu
2020-06-19 14:19 ` Codrin Ciubotariu
2020-08-02 16:54 ` Wolfram Sang
2020-08-02 16:54 ` Wolfram Sang
2020-08-03 13:27 ` Codrin.Ciubotariu
2020-08-03 13:27 ` Codrin.Ciubotariu
2020-08-03 16:49 ` wsa
2020-08-03 16:49 ` wsa
2020-06-19 14:19 ` [RFC PATCH 3/4] i2c: core: treat EPROBE_DEFER when acquiring SCL/SDA GPIOs Codrin Ciubotariu
2020-06-19 14:19 ` Codrin Ciubotariu
2020-08-02 17:05 ` Wolfram Sang
2020-08-02 17:05 ` Wolfram Sang
2020-08-03 15:33 ` Codrin.Ciubotariu
2020-08-03 15:33 ` Codrin.Ciubotariu
2020-08-03 16:59 ` wsa
2020-08-03 16:59 ` wsa
2020-06-19 14:19 ` [RFC PATCH 4/4] i2c: at91: Move to generic GPIO bus recovery Codrin Ciubotariu
2020-06-19 14:19 ` Codrin Ciubotariu
2020-08-02 17:08 ` Wolfram Sang
2020-08-02 17:08 ` Wolfram Sang
2020-08-03 15:42 ` Codrin.Ciubotariu
2020-08-03 15:42 ` Codrin.Ciubotariu
2020-08-03 16:59 ` wsa
2020-08-03 16:59 ` wsa
2020-08-26 6:14 ` Wolfram Sang
2020-08-26 6:14 ` Wolfram Sang
2020-09-04 8:55 ` Codrin.Ciubotariu [this message]
2020-09-04 8:55 ` Codrin.Ciubotariu
2020-09-04 9:20 ` Wolfram Sang
2020-09-04 9:20 ` Wolfram Sang
2020-07-05 21:09 ` [RFC PATCH 0/4] i2c: core: add " Wolfram Sang
2020-07-05 21:09 ` Wolfram Sang
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