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at91sam9g45: add atmel-spi support 

Signed-off-by: Hubert Feurstein <h.feurstein@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Hubert Feurstein 2011-09-10 21:18:33 +02:00 committed by Sascha Hauer
parent bea738f7ba
commit 156d751b7e
2 changed files with 43 additions and 0 deletions
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41
arch/arm/mach-at91/at91sam9g45_devices.c
View File

@ -261,3 +261,44 @@ void at91_add_device_mci(short mmc_id, struct atmel_mci_platform_data *data)
void at91_add_device_mci(short mmc_id, struct atmel_mci_platform_data *data) {}
#endif
#if defined(CONFIG_DRIVER_SPI_ATMEL)
/* SPI */
void at91_add_device_spi(int spi_id, struct at91_spi_platform_data *pdata)
{
int i;
int cs_pin;
resource_size_t start;
for (i = 0; i < pdata->num_chipselect; i++) {
cs_pin = pdata->chipselect[i];
/* enable chip-select pin */
if (cs_pin > 0)
at91_set_gpio_output(cs_pin, 1);
}
/* Configure SPI bus(es) */
if (spi_id == 0) {
start = AT91SAM9G45_BASE_SPI0;
at91_set_A_periph(AT91_PIN_PB0, 0); /* SPI0_MISO */
at91_set_A_periph(AT91_PIN_PB1, 0); /* SPI0_MOSI */
at91_set_A_periph(AT91_PIN_PB2, 0); /* SPI0_SPCK */
add_generic_device("atmel_spi", spi_id, NULL, start, SZ_16K,
IORESOURCE_MEM, pdata);
}
else if (spi_id == 1) {
start = AT91SAM9G45_BASE_SPI1;
at91_set_A_periph(AT91_PIN_PB14, 0); /* SPI1_MISO */
at91_set_A_periph(AT91_PIN_PB15, 0); /* SPI1_MOSI */
at91_set_A_periph(AT91_PIN_PB16, 0); /* SPI1_SPCK */
add_generic_device("atmel_spi", spi_id, NULL, start, SZ_16K,
IORESOURCE_MEM, pdata);
}
}
#else
void at91_add_device_spi(int spi_id, struct at91_spi_platform_data *pdata) {}
#endif

2
arch/arm/mach-at91/include/mach/board.h
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@ -82,4 +82,6 @@ struct at91_spi_platform_data {
int *chipselect; /* array of gpio_pins */
int num_chipselect; /* chipselect array entry count */
};
void at91_add_device_spi(int spi_id, struct at91_spi_platform_data *pdata);
#endif