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From: Wolfram Sang <wsa@the-dreams.de>
To: Eugen.Hristev@microchip.com
Cc: alexandre.belloni@bootlin.com, peda@axentia.se,
	robh+dt@kernel.org, mark.rutland@arm.com,
	Nicolas.Ferre@microchip.com, Ludovic.Desroches@microchip.com,
	linux-i2c@vger.kernel.org, devicetree@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org,
	linux-stm32@st-md-mailman.stormreply.com,
	pierre-yves.mordret@st.com
Subject: Re: I2C filtering (was Re: [PATCH v2 6/9] dt-bindings: i2c: at91: add binding for enable-ana-filt)
Date: Thu, 27 Jun 2019 15:34:40 +0200	[thread overview]
Message-ID: <20190627133440.GA7158@ninjato> (raw)
In-Reply-To: <eb2d87b7-437c-53ee-a1ca-37c4d3fadea6@microchip.com>

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> > Apart from enabling the filter there is indeed one configuration
> > setting, the maximum pulse width of spikes to be suppressed by the input
> > filter.

Yup, this is what I anticipated.

> This is a number 0 to 7 (3 bits) that represents the width of the spike 
> in periph clock cycles.

For a generic binding, we would need some time-value as a parameter and
convert it to clock cycles in the driver then, I'd think.

> I am looking to see what is PADFCFG , as it's related to the PAD analog 
> filter configuration. It may be unused by the filter.

Thanks!


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WARNING: multiple messages have this Message-ID (diff)
From: Wolfram Sang <wsa@the-dreams.de>
To: Eugen.Hristev@microchip.com
Cc: mark.rutland@arm.com, devicetree@vger.kernel.org,
	alexandre.belloni@bootlin.com,
	linux-stm32@st-md-mailman.stormreply.com,
	pierre-yves.mordret@st.com, linux-kernel@vger.kernel.org,
	Ludovic.Desroches@microchip.com, robh+dt@kernel.org,
	linux-i2c@vger.kernel.org, peda@axentia.se,
	linux-arm-kernel@lists.infradead.org
Subject: Re: I2C filtering (was Re: [PATCH v2 6/9] dt-bindings: i2c: at91: add binding for enable-ana-filt)
Date: Thu, 27 Jun 2019 15:34:40 +0200	[thread overview]
Message-ID: <20190627133440.GA7158@ninjato> (raw)
In-Reply-To: <eb2d87b7-437c-53ee-a1ca-37c4d3fadea6@microchip.com>


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> > Apart from enabling the filter there is indeed one configuration
> > setting, the maximum pulse width of spikes to be suppressed by the input
> > filter.

Yup, this is what I anticipated.

> This is a number 0 to 7 (3 bits) that represents the width of the spike 
> in periph clock cycles.

For a generic binding, we would need some time-value as a parameter and
convert it to clock cycles in the driver then, I'd think.

> I am looking to see what is PADFCFG , as it's related to the PAD analog 
> filter configuration. It may be unused by the filter.

Thanks!


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  reply	other threads:[~2019-06-27 13:34 UTC|newest]

Thread overview: 52+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-25  8:04 [PATCH v2 0/9] i2c: at91: filters support for at91 SoCs Eugen.Hristev
2019-06-25  8:04 ` Eugen.Hristev
2019-06-25  8:04 ` Eugen.Hristev
2019-06-25  8:04 ` [PATCH v2 1/9] dt-bindings: i2c: at91: add new compatible Eugen.Hristev
2019-06-25  8:04   ` Eugen.Hristev
2019-06-25  8:04   ` Eugen.Hristev
2019-06-25  8:04 ` [PATCH v2 2/9] i2c: at91: add new platform support for sam9x60 Eugen.Hristev
2019-06-25  8:04   ` Eugen.Hristev
2019-06-25  8:04   ` Eugen.Hristev
2019-06-25  8:04 ` [PATCH v2 3/9] dt-bindings: i2c: at91: add binding for enable-dig-filtr Eugen.Hristev
2019-06-25  8:04   ` Eugen.Hristev
2019-06-25  8:04   ` Eugen.Hristev
2019-06-25  8:57   ` Peter Rosin
2019-06-25  8:57     ` Peter Rosin
2019-06-25  8:04 ` [PATCH v2 4/9] i2c: at91: add support for digital filtering Eugen.Hristev
2019-06-25  8:04   ` Eugen.Hristev
2019-06-25  8:04   ` Eugen.Hristev
2019-06-25  8:04 ` [PATCH v2 5/9] i2c: at91: add support for advanced " Eugen.Hristev
2019-06-25  8:04   ` Eugen.Hristev
2019-06-25  8:04   ` Eugen.Hristev
2019-06-25  8:05 ` [PATCH v2 6/9] dt-bindings: i2c: at91: add binding for enable-ana-filt Eugen.Hristev
2019-06-25  8:05   ` Eugen.Hristev
2019-06-25  8:05   ` Eugen.Hristev
2019-06-25  8:55   ` Peter Rosin
2019-06-25  8:55     ` Peter Rosin
2019-06-25  9:14     ` Eugen.Hristev
2019-06-25  9:14       ` Eugen.Hristev
2019-06-25  9:14       ` Eugen.Hristev
2019-06-25  9:31       ` Alexandre Belloni
2019-06-25  9:31         ` Alexandre Belloni
2019-06-25  9:55         ` I2C filtering (was Re: [PATCH v2 6/9] dt-bindings: i2c: at91: add binding for enable-ana-filt) Wolfram Sang
2019-06-25  9:55           ` Wolfram Sang
2019-06-27 13:22           ` Alexandre Belloni
2019-06-27 13:22             ` Alexandre Belloni
2019-06-27 13:31             ` Eugen.Hristev
2019-06-27 13:31               ` Eugen.Hristev
2019-06-27 13:31               ` Eugen.Hristev
2019-06-27 13:34               ` Wolfram Sang [this message]
2019-06-27 13:34                 ` Wolfram Sang
2019-06-27 13:39                 ` Alexandre Belloni
2019-06-27 13:39                   ` Alexandre Belloni
2019-06-25  8:05 ` [PATCH v2 7/9] i2c: at91: add support for analog filtering Eugen.Hristev
2019-06-25  8:05   ` Eugen.Hristev
2019-06-25  8:05   ` Eugen.Hristev
2019-06-25  8:05 ` [PATCH v2 8/9] ARM: dts: at91: sama5d2_xplained: add analogic and digital filter for i2c Eugen.Hristev
2019-06-25  8:05   ` Eugen.Hristev
2019-06-25  8:05   ` Eugen.Hristev
2019-06-25  8:05 ` [PATCH v2 9/9] ARM: dts: at91: sama5d4_xplained: add analogic " Eugen.Hristev
2019-06-25  8:05   ` Eugen.Hristev
2019-06-25  8:05   ` Eugen.Hristev
2019-06-25  8:51   ` Peter Rosin
2019-06-25  8:51     ` Peter Rosin

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