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

Jonathan Cameron
2011-11-10T17:37:00Z

On 11/09/2011 10:19 AM, Maxime Ripard wrote:
> Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
> Cc: Patrice Vilchez <patrice.vilchez@atmel.com>
> Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
>
Fine as far as I am concerned but this one is definitely one for acks
from others as well.
> Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Jonathan Cameron <jic23@cam.ac.uk>
> ---
> arch/arm/mach-at91/at91sam9260_devices.c | 52 ++++++++++++++++++++++++++++++
> arch/arm/mach-at91/board-sam9g20ek.c | 11 ++++++
> 2 files changed, 63 insertions(+), 0 deletions(-)
>
> diff --git a/arch/arm/mach-at91/at91sam9260_devices.c b/arch/arm/mach-at91/at91sam9260_devices.c
> index 39f81f4..0859553 100644
> --- a/arch/arm/mach-at91/at91sam9260_devices.c
> +++ b/arch/arm/mach-at91/at91sam9260_devices.c
> @@ -1312,6 +1312,58 @@ void __init at91_add_device_cf(struct at91_cf_data *data)
> void __init at91_add_device_cf(struct at91_cf_data * data) {}
> #endif
>
> +/* --------------------------------------------------------------------
> + * ADCs
> + * -------------------------------------------------------------------- */
> +
> +static struct at91_adc_data adc_data;
> +
> +static struct resource adc_resources[] = {
> + [0] = {
> + .start = AT91SAM9260_BASE_ADC,
> + .end = AT91SAM9260_BASE_ADC + SZ_16K - 1,
> + .flags = IORESOURCE_MEM,
> + },
> + [1] = {
> + .start = AT91SAM9260_ID_ADC,
> + .end = AT91SAM9260_ID_ADC,
> + .flags = IORESOURCE_IRQ,
> + },
> +};
> +
> +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;
> +
> + if (test_bit(0, &(data->channels_used)))
> + at91_set_A_periph(AT91_PIN_PC0, 0);
> + if (test_bit(1, &(data->channels_used)))
> + at91_set_A_periph(AT91_PIN_PC1, 0);
> + if (test_bit(2, &(data->channels_used)))
> + at91_set_A_periph(AT91_PIN_PC2, 0);
> + if (test_bit(3, &(data->channels_used)))
> + at91_set_A_periph(AT91_PIN_PC3, 0);
> +
> + data->adc_clock = 5000000;
> + data->num_channels = 4;
> + data->startup_time = 10;
> +
> + adc_data = *data;
> + platform_device_register(&at91_adc_device);
> +}
> +
> +
> /* -------------------------------------------------------------------- */
> /*
> * These devices are always present and don't need any board-specific
> diff --git a/arch/arm/mach-at91/board-sam9g20ek.c b/arch/arm/mach-at91/board-sam9g20ek.c
> index 817f59d..e34d41a 100644
> --- a/arch/arm/mach-at91/board-sam9g20ek.c
> +++ b/arch/arm/mach-at91/board-sam9g20ek.c
> @@ -314,6 +314,15 @@ static void __init ek_add_device_buttons(void)
> static void __init ek_add_device_buttons(void) {}
> #endif
>
> +/*
> + * ADCs
> + */
> +
> +static struct at91_adc_data ek_adc_data = {
> + .channels_used = BIT(0) | BIT(1) | BIT(2) | BIT(3),
> + .vref = 3300,
> +};
> +
> #if defined(CONFIG_REGULATOR_FIXED_VOLTAGE) || defined(CONFIG_REGULATOR_FIXED_VOLTAGE_MODULE)
> static struct regulator_consumer_supply ek_audio_consumer_supplies[] = {
> REGULATOR_SUPPLY("AVDD", "0-001b"),
> @@ -389,6 +398,8 @@ static void __init ek_board_init(void)
> ek_add_device_gpio_leds();
> /* Push Buttons */
> ek_add_device_buttons();
> + /* ADCs */
> + at91_add_device_adc(&ek_adc_data);
> /* PCK0 provides MCLK to the WM8731 */
> at91_set_B_periph(AT91_PIN_PC1, 0);
> /* SSC (for WM8731) */