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: Maxime Ripard <maxime.ripard@free-electrons.com> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Maxime Ripard
Greg Kroah-Hartman
parent
0e589d5fb3
commit
67b5d7b3e2
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@ -55,6 +55,13 @@ static struct clk adc_clk = {
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.pmc_mask = 1 << AT91SAM9260_ID_ADC,
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.type = CLK_TYPE_PERIPHERAL,
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};
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static struct clk adc_op_clk = {
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.name = "adc_op_clk",
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.type = CLK_TYPE_PERIPHERAL,
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.rate_hz = 5000000,
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};
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static struct clk usart0_clk = {
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.name = "usart0_clk",
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.pmc_mask = 1 << AT91SAM9260_ID_US0,
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@ -166,6 +173,7 @@ static struct clk *periph_clocks[] __initdata = {
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&pioB_clk,
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&pioC_clk,
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&adc_clk,
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&adc_op_clk,
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&usart0_clk,
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&usart1_clk,
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&usart2_clk,
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@ -17,12 +17,15 @@
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#include <linux/platform_device.h>
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#include <linux/i2c-gpio.h>
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#include <linux/platform_data/at91_adc.h>
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#include <mach/board.h>
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#include <mach/cpu.h>
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#include <mach/at91sam9260.h>
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#include <mach/at91sam9260_matrix.h>
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#include <mach/at91_matrix.h>
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#include <mach/at91sam9_smc.h>
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#include <mach/at91_adc.h>
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#include "generic.h"
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@ -1369,6 +1372,93 @@ void __init at91_add_device_cf(struct at91_cf_data *data)
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void __init at91_add_device_cf(struct at91_cf_data * data) {}
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#endif
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/* --------------------------------------------------------------------
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* ADCs
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* -------------------------------------------------------------------- */
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#if IS_ENABLED(CONFIG_AT91_ADC)
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static struct at91_adc_data adc_data;
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static struct resource adc_resources[] = {
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[0] = {
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.start = AT91SAM9260_BASE_ADC,
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.end = AT91SAM9260_BASE_ADC + SZ_16K - 1,
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.flags = IORESOURCE_MEM,
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},
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[1] = {
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.start = AT91SAM9260_ID_ADC,
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.end = AT91SAM9260_ID_ADC,
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.flags = IORESOURCE_IRQ,
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},
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};
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static struct platform_device at91_adc_device = {
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.name = "at91_adc",
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.id = -1,
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.dev = {
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.platform_data = &adc_data,
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},
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.resource = adc_resources,
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.num_resources = ARRAY_SIZE(adc_resources),
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};
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static struct at91_adc_trigger at91_adc_triggers[] = {
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[0] = {
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.name = "timer-counter-0",
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.value = AT91_ADC_TRGSEL_TC0 | AT91_ADC_TRGEN,
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},
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[1] = {
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.name = "timer-counter-1",
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.value = AT91_ADC_TRGSEL_TC1 | AT91_ADC_TRGEN,
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},
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[2] = {
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.name = "timer-counter-2",
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.value = AT91_ADC_TRGSEL_TC2 | AT91_ADC_TRGEN,
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},
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[3] = {
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.name = "external",
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.value = AT91_ADC_TRGSEL_EXTERNAL | AT91_ADC_TRGEN,
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.is_external = true,
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},
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};
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static struct at91_adc_reg_desc at91_adc_register_g20 = {
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.channel_base = AT91_ADC_CHR(0),
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.drdy_mask = AT91_ADC_DRDY,
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.status_register = AT91_ADC_SR,
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.trigger_register = AT91_ADC_MR,
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};
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void __init at91_add_device_adc(struct at91_adc_data *data)
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{
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if (!data)
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return;
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if (test_bit(0, &data->channels_used))
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at91_set_A_periph(AT91_PIN_PC0, 0);
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if (test_bit(1, &data->channels_used))
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at91_set_A_periph(AT91_PIN_PC1, 0);
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if (test_bit(2, &data->channels_used))
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at91_set_A_periph(AT91_PIN_PC2, 0);
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if (test_bit(3, &data->channels_used))
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at91_set_A_periph(AT91_PIN_PC3, 0);
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if (data->use_external_triggers)
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at91_set_A_periph(AT91_PIN_PA22, 0);
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data->num_channels = 4;
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data->startup_time = 10;
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data->registers = &at91_adc_register_g20;
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data->trigger_number = 4;
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data->trigger_list = at91_adc_triggers;
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adc_data = *data;
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platform_device_register(&at91_adc_device);
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}
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#else
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void __init at91_add_device_adc(struct at91_adc_data *data) {}
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#endif
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/* -------------------------------------------------------------------- */
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/*
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* These devices are always present and don't need any board-specific
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@ -32,6 +32,8 @@
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#include <linux/regulator/fixed.h>
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#include <linux/regulator/consumer.h>
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#include <linux/platform_data/at91_adc.h>
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#include <mach/hardware.h>
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#include <asm/setup.h>
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#include <asm/mach-types.h>
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@ -318,6 +320,16 @@ static void __init ek_add_device_buttons(void)
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static void __init ek_add_device_buttons(void) {}
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#endif
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/*
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* ADCs
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*/
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static struct at91_adc_data ek_adc_data = {
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.channels_used = BIT(0) | BIT(1) | BIT(2) | BIT(3),
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.use_external_triggers = true,
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.vref = 3300,
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};
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#if defined(CONFIG_REGULATOR_FIXED_VOLTAGE) || defined(CONFIG_REGULATOR_FIXED_VOLTAGE_MODULE)
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static struct regulator_consumer_supply ek_audio_consumer_supplies[] = {
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REGULATOR_SUPPLY("AVDD", "0-001b"),
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@ -393,6 +405,8 @@ static void __init ek_board_init(void)
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ek_add_device_gpio_leds();
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/* Push Buttons */
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ek_add_device_buttons();
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/* ADCs */
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at91_add_device_adc(&ek_adc_data);
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/* PCK0 provides MCLK to the WM8731 */
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at91_set_B_periph(AT91_PIN_PC1, 0);
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/* SSC (for WM8731) */
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