[PATCH 3/3] ARM: AT91: Add the ADC to the sam9g20ek board

[Maxime Ripard]

Hi,

On 20/10/2011 08:28, Alexander Stein wrote:
> On Wednesday 19 October 2011 18:18:54 Maxime Ripard wrote:
>> diff --git a/arch/arm/mach-at91/at91sam9260_devices.c
>> b/arch/arm/mach-at91/at91sam9260_devices.c index 39f81f4..4f5e0f9 100644
>> --- a/arch/arm/mach-at91/at91sam9260_devices.c
>> +++ b/arch/arm/mach-at91/at91sam9260_devices.c
>> [...]
>> +static struct platform_device at91_adc_device = {
>> +	.name		= "at91adc",
>> +	.id		= -1,
>> +	.dev		= {
>> +				.platform_data		= &adc_data,
>> +	},
>> +	.resource	= adc_resources,
>> +	.num_resources	= ARRAY_SIZE(adc_resources),
>> +};
>> +
>> +void __init at91_add_device_adc(struct at91_adc_data *data)
>> +{
>> +	if (!data)
>> +		return;
>> +
>> +	at91_set_A_periph(AT91_PIN_PC0, 0);
>> +	at91_set_A_periph(AT91_PIN_PC1, 0);
>> +	at91_set_A_periph(AT91_PIN_PC2, 0);
>> +	at91_set_A_periph(AT91_PIN_PC3, 0);
>> +
>> +	adc_data = *data;
>> +	platform_device_register(&at91_adc_device);
>> +}
>> +
>> +
> 
> This assumes that all 4 channels are used every time.  How about only using an 
> AD channel on PC2 or all but the one on PC1?

You're right. I've implemented Thomas suggestion to define the channels
in use in a board specific manner. I need to test my changes and will
submit a new version by monday.

Thanks,

-- 
Maxime Ripard, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com