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Commit 67b5d7b3 authored by Maxime Ripard's avatar Maxime Ripard Committed by Greg Kroah-Hartman
Browse files

ARM: AT91: Add the ADC to the sam9g20ek board 



This patch adds platform data for the AT91 ADC driver support for
the AT91SAM9G20-EK board.

Signed-off-by: default avatarMaxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: default avatarNicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: default avatarArnd Bergmann <arnd@arndb.de>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 0e589d5f

arch/arm/mach-at91/at91sam9260.c

+8 −0
Original line number Diff line number Diff line
@@ -55,6 +55,13 @@ static struct clk adc_clk = { 
	.pmc_mask	= 1 << AT91SAM9260_ID_ADC,

	.type		= CLK_TYPE_PERIPHERAL,

};



static struct clk adc_op_clk = {

	.name		= "adc_op_clk",

	.type		= CLK_TYPE_PERIPHERAL,

	.rate_hz	= 5000000,

};



static struct clk usart0_clk = {

	.name		= "usart0_clk",

	.pmc_mask	= 1 << AT91SAM9260_ID_US0,
@@ -166,6 +173,7 @@ static struct clk *periph_clocks[] __initdata = { 
	&pioB_clk,

	&pioC_clk,

	&adc_clk,

	&adc_op_clk,

	&usart0_clk,

	&usart1_clk,

	&usart2_clk,

arch/arm/mach-at91/at91sam9260_devices.c

+90 −0
Original line number Diff line number Diff line
@@ -17,12 +17,15 @@ 
#include <linux/platform_device.h>

#include <linux/i2c-gpio.h>



#include <linux/platform_data/at91_adc.h>



#include <mach/board.h>

#include <mach/cpu.h>

#include <mach/at91sam9260.h>

#include <mach/at91sam9260_matrix.h>

#include <mach/at91_matrix.h>

#include <mach/at91sam9_smc.h>

#include <mach/at91_adc.h>



#include "generic.h"
@@ -1369,6 +1372,93 @@ void __init at91_add_device_cf(struct at91_cf_data *data) 
void __init at91_add_device_cf(struct at91_cf_data * data) {}

#endif



/* --------------------------------------------------------------------

 *  ADCs

 * -------------------------------------------------------------------- */



#if IS_ENABLED(CONFIG_AT91_ADC)

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		= "at91_adc",

	.id		= -1,

	.dev		= {

				.platform_data		= &adc_data,

	},

	.resource	= adc_resources,

	.num_resources	= ARRAY_SIZE(adc_resources),

};



static struct at91_adc_trigger at91_adc_triggers[] = {

	[0] = {

		.name = "timer-counter-0",

		.value = AT91_ADC_TRGSEL_TC0 | AT91_ADC_TRGEN,

	},

	[1] = {

		.name = "timer-counter-1",

		.value = AT91_ADC_TRGSEL_TC1 | AT91_ADC_TRGEN,

	},

	[2] = {

		.name = "timer-counter-2",

		.value = AT91_ADC_TRGSEL_TC2 | AT91_ADC_TRGEN,

	},

	[3] = {

		.name = "external",

		.value = AT91_ADC_TRGSEL_EXTERNAL | AT91_ADC_TRGEN,

		.is_external = true,

	},

};



static struct at91_adc_reg_desc at91_adc_register_g20 = {

	.channel_base = AT91_ADC_CHR(0),

	.drdy_mask = AT91_ADC_DRDY,

	.status_register = AT91_ADC_SR,

	.trigger_register = AT91_ADC_MR,

};



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);



	if (data->use_external_triggers)

		at91_set_A_periph(AT91_PIN_PA22, 0);



	data->num_channels = 4;

	data->startup_time = 10;

	data->registers = &at91_adc_register_g20;

	data->trigger_number = 4;

	data->trigger_list = at91_adc_triggers;



	adc_data = *data;

	platform_device_register(&at91_adc_device);

}

#else

void __init at91_add_device_adc(struct at91_adc_data *data) {}

#endif



/* -------------------------------------------------------------------- */

/*

 * These devices are always present and don't need any board-specific

arch/arm/mach-at91/board-sam9g20ek.c

+14 −0
Original line number Diff line number Diff line
@@ -32,6 +32,8 @@ 
#include <linux/regulator/fixed.h>

#include <linux/regulator/consumer.h>



#include <linux/platform_data/at91_adc.h>



#include <mach/hardware.h>

#include <asm/setup.h>

#include <asm/mach-types.h>
@@ -318,6 +320,16 @@ 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),

	.use_external_triggers = true,

	.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"),
@@ -393,6 +405,8 @@ 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) */