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ARM: AT91: ADC: Add support for the AT91SAM9M10G45-EK board
This patch adds platform data for the AT91 ADC driver support for the AT91SAM9M10G45-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
67b5d7b3e2
commit
4a5920e848
@ -176,6 +176,12 @@ static struct clk vdec_clk = {
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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 = 13200000,
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};
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static struct clk *periph_clocks[] __initdata = {
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&pioA_clk,
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&pioB_clk,
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@ -204,6 +210,7 @@ static struct clk *periph_clocks[] __initdata = {
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&isi_clk,
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&udphs_clk,
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&mmc1_clk,
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&adc_op_clk,
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// irq0
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};
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@ -242,6 +249,8 @@ static struct clk_lookup periph_clocks_lookups[] = {
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CLKDEV_CON_ID("pioC", &pioC_clk),
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CLKDEV_CON_ID("pioD", &pioDE_clk),
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CLKDEV_CON_ID("pioE", &pioDE_clk),
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/* Fake adc clock */
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CLKDEV_CON_ID("adc_clk", &tsc_clk),
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};
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static struct clk_lookup usart_clocks_lookups[] = {
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@ -19,9 +19,12 @@
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#include <linux/i2c-gpio.h>
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#include <linux/atmel-mci.h>
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#include <linux/platform_data/at91_adc.h>
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#include <linux/fb.h>
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#include <video/atmel_lcdc.h>
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#include <mach/at91_adc.h>
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#include <mach/board.h>
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#include <mach/at91sam9g45.h>
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#include <mach/at91sam9g45_matrix.h>
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@ -1206,6 +1209,104 @@ void __init at91_add_device_tsadcc(struct at91_tsadcc_data *data) {}
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#endif
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/* --------------------------------------------------------------------
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* ADC
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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 = AT91SAM9G45_BASE_TSC,
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.end = AT91SAM9G45_BASE_TSC + SZ_16K - 1,
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.flags = IORESOURCE_MEM,
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},
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[1] = {
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.start = AT91SAM9G45_ID_TSC,
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.end = AT91SAM9G45_ID_TSC,
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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 = "external-rising",
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.value = 1,
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.is_external = true,
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},
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[1] = {
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.name = "external-falling",
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.value = 2,
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.is_external = true,
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},
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[2] = {
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.name = "external-any",
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.value = 3,
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.is_external = true,
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},
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[3] = {
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.name = "continuous",
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.value = 6,
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.is_external = false,
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},
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};
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static struct at91_adc_reg_desc at91_adc_register_g45 = {
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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 = 0x08,
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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_gpio_input(AT91_PIN_PD20, 0);
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if (test_bit(1, &data->channels_used))
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at91_set_gpio_input(AT91_PIN_PD21, 0);
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if (test_bit(2, &data->channels_used))
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at91_set_gpio_input(AT91_PIN_PD22, 0);
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if (test_bit(3, &data->channels_used))
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at91_set_gpio_input(AT91_PIN_PD23, 0);
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if (test_bit(4, &data->channels_used))
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at91_set_gpio_input(AT91_PIN_PD24, 0);
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if (test_bit(5, &data->channels_used))
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at91_set_gpio_input(AT91_PIN_PD25, 0);
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if (test_bit(6, &data->channels_used))
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at91_set_gpio_input(AT91_PIN_PD26, 0);
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if (test_bit(7, &data->channels_used))
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at91_set_gpio_input(AT91_PIN_PD27, 0);
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if (data->use_external_triggers)
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at91_set_A_periph(AT91_PIN_PD28, 0);
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data->num_channels = 8;
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data->startup_time = 40;
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data->registers = &at91_adc_register_g45;
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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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* RTT
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* -------------------------------------------------------------------- */
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@ -27,6 +27,8 @@
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#include <linux/atmel-mci.h>
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#include <linux/delay.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 <video/atmel_lcdc.h>
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#include <media/soc_camera.h>
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@ -315,6 +317,14 @@ static struct at91_tsadcc_data ek_tsadcc_data = {
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.ts_sample_hold_time = 0x0a,
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};
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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) | BIT(4) | BIT(5) | BIT(6) | BIT(7),
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.use_external_triggers = true,
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.vref = 3300,
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};
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/*
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* GPIO Buttons
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@ -480,6 +490,8 @@ static void __init ek_board_init(void)
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at91_add_device_lcdc(&ek_lcdc_data);
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/* Touch Screen */
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at91_add_device_tsadcc(&ek_tsadcc_data);
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/* ADC */
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at91_add_device_adc(&ek_adc_data);
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/* Push Buttons */
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ek_add_device_buttons();
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/* AC97 */
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