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| author | Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> | 2012-11-03 12:36:30 +0100 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2012-11-15 20:20:29 +0100 |
| commit | d7a4acac7c9ba73eef55bf26cef5145f63e56dd7 (patch) | |
| tree | 3a94c84b67f6052c263bfb23a6ddce9db760398a /arch/arm/mach-at91/at91sam9x5_devices.c | |
| parent | fe67b42201092ab76bdae944daf6bf3a867a3d51 (diff) | |
| download | barebox-d7a4acac7c9ba73eef55bf26cef5145f63e56dd7.tar.gz barebox-d7a4acac7c9ba73eef55bf26cef5145f63e56dd7.tar.xz | |
at91sam9x5: add spi support
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'arch/arm/mach-at91/at91sam9x5_devices.c')
| -rw-r--r-- | arch/arm/mach-at91/at91sam9x5_devices.c | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/arch/arm/mach-at91/at91sam9x5_devices.c b/arch/arm/mach-at91/at91sam9x5_devices.c index 5a24325ca1..710ded7099 100644 --- a/arch/arm/mach-at91/at91sam9x5_devices.c +++ b/arch/arm/mach-at91/at91sam9x5_devices.c @@ -228,6 +228,68 @@ void at91_add_device_i2c(short i2c_id, struct i2c_board_info *devices, int nr_de #endif /* -------------------------------------------------------------------- + * SPI + * -------------------------------------------------------------------- */ + +#if defined(CONFIG_DRIVER_SPI_ATMEL) +static unsigned spi0_standard_cs[4] = { AT91_PIN_PA14, AT91_PIN_PA7, AT91_PIN_PA1, AT91_PIN_PB3 }; + +static unsigned spi1_standard_cs[4] = { AT91_PIN_PA8, AT91_PIN_PA0, AT91_PIN_PA31, AT91_PIN_PA30 }; + +static struct at91_spi_platform_data spi_pdata[] = { + [0] = { + .chipselect = spi0_standard_cs, + .num_chipselect = ARRAY_SIZE(spi0_standard_cs), + }, + [1] = { + .chipselect = spi1_standard_cs, + .num_chipselect = ARRAY_SIZE(spi1_standard_cs), + }, +}; + +void at91_add_device_spi(int spi_id, struct at91_spi_platform_data *pdata) +{ + int i; + int cs_pin; + resource_size_t start = ~0; + + BUG_ON(spi_id > 1); + + if (!pdata) + pdata = &spi_pdata[spi_id]; + + 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) */ + switch (spi_id) { + case 0: + start = AT91SAM9X5_BASE_SPI0; + at91_set_A_periph(AT91_PIN_PA11, 0); /* SPI0_MISO */ + at91_set_A_periph(AT91_PIN_PA12, 0); /* SPI0_MOSI */ + at91_set_A_periph(AT91_PIN_PA13, 0); /* SPI0_SPCK */ + break; + case 1: + start = AT91SAM9X5_BASE_SPI1; + at91_set_B_periph(AT91_PIN_PA21, 0); /* SPI1_MISO */ + at91_set_B_periph(AT91_PIN_PA22, 0); /* SPI1_MOSI */ + at91_set_B_periph(AT91_PIN_PA23, 0); /* SPI1_SPCK */ + break; + } + + 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 + +/* -------------------------------------------------------------------- * UART * -------------------------------------------------------------------- */ |