From: ludovic.desroches@atmel•com (ludovic.desroches)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH 1/3] ARM: AT91: IIO: add low and high res support for adc
Date: Thu, 20 Dec 2012 11:52:22 +0100 [thread overview]
Message-ID: <50D2EDE6.3090706@atmel.com> (raw)
In-Reply-To: <50D2EBA1.4050305@free-electrons.com>
Hi Maxime,
On 12/20/2012 11:42 AM, Maxime Ripard wrote:
> Hi,
>
> Le 19/12/2012 19:37, Jean-Christophe PLAGNIOL-VILLARD a ?crit :
>> From: Ludovic Desroches <ludovic.desroches@atmel•com>
>>
>> at91 adc offers the choice between two resolutions: low and high.
>> The low and high resolution values depends on adc IP version, as many IP
>> properties have been exposed through device tree, these settings have also
>> been added to the dt bindings.
>>
>> Update at the same time the dtsi.
>>
>> Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel•com>
>> [plagnioj at jcrosoft.com: udpate current adc dt support]
>> Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft•com>
>> Cc: linux-iio at vger.kernel.org
>> Cc: Nicolas Ferre <nicolas.ferre@atmel•com>
>> ---
>> .../devicetree/bindings/arm/atmel-adc.txt | 11 +++
>> arch/arm/boot/dts/at91sam9260.dtsi | 3 +
>> arch/arm/boot/dts/at91sam9g45.dtsi | 3 +
>> arch/arm/boot/dts/at91sam9x5.dtsi | 3 +
>> drivers/iio/adc/at91_adc.c | 74 ++++++++++++++++++--
>> 5 files changed, 90 insertions(+), 4 deletions(-)
>>
>> diff --git a/Documentation/devicetree/bindings/arm/atmel-adc.txt b/Documentation/devicetree/bindings/arm/atmel-adc.txt
>> index c63097d..fd2d69e 100644
>> --- a/Documentation/devicetree/bindings/arm/atmel-adc.txt
>> +++ b/Documentation/devicetree/bindings/arm/atmel-adc.txt
>> @@ -14,9 +14,17 @@ Required properties:
>> - atmel,adc-status-register: Offset of the Interrupt Status Register
>> - atmel,adc-trigger-register: Offset of the Trigger Register
>> - atmel,adc-vref: Reference voltage in millivolts for the conversions
>> + - atmel,adc-res: List of resolution in bits supported by the ADC. List size
>> + must be two at least.
>> + - atmel,adc-res-names: Contains one identifier string for each resolution
>> + in atmel,adc-res property. "lowres" and "highres"
>> + identifiers are required.
>>
>> Optional properties:
>> - atmel,adc-use-external: Boolean to enable of external triggers
>> + - atmel,adc-use-res: String corresponding to an identifier from
>> + atmel,adc-res-names property. If not specified, the highest
>> + resolution will be used.
>
>
> I'm wondering, why are you using such a complex dt parsing code, and
> bindings, when you only requires a boolean to switch between 8 and 10
> bits mode (which seem to be the only thing you support)?
We will have a 10 and 12 bits mode on future ADCs and I would like to
have something which could manage more than two resolutions if it
happens one day.
Regards
Ludovic
>
> Maxime
>
next prev parent reply other threads:[~2012-12-20 10:52 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-19 18:32 [PATCH 0/3] IIO: AT91: add lowres, sleep and sample&hold time missing support Jean-Christophe PLAGNIOL-VILLARD
2012-12-19 18:37 ` [PATCH 1/3] ARM: AT91: IIO: add low and high res support for adc Jean-Christophe PLAGNIOL-VILLARD
2012-12-19 18:37 ` [PATCH 2/3] ARM: AT91: IIO: add sleep mode support Jean-Christophe PLAGNIOL-VILLARD
2012-12-20 10:46 ` Maxime Ripard
2012-12-27 12:09 ` Jonathan Cameron
2012-12-27 17:54 ` Maxime Ripard
2012-12-19 18:37 ` [PATCH 3/3] ARM: AT91: IIO: fix missing Sample and Hold time Jean-Christophe PLAGNIOL-VILLARD
2012-12-20 10:55 ` Maxime Ripard
2012-12-20 12:49 ` Jean-Christophe PLAGNIOL-VILLARD
2012-12-21 9:08 ` Maxime Ripard
2012-12-20 10:42 ` [PATCH 1/3] ARM: AT91: IIO: add low and high res support for adc Maxime Ripard
2012-12-20 10:52 ` ludovic.desroches [this message]
2012-12-20 15:51 ` Maxime Ripard
2012-12-20 16:13 ` ludovic.desroches
2012-12-21 9:07 ` Maxime Ripard
2012-12-22 17:21 ` Jean-Christophe PLAGNIOL-VILLARD
2013-01-07 9:20 ` Maxime Ripard
2012-12-20 10:40 ` [PATCH 0/3] IIO: AT91: add lowres, sleep and sample&hold time missing support Maxime Ripard
2012-12-20 10:51 ` Nicolas Ferre
2012-12-27 12:14 ` Jonathan Cameron
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