diff options
Diffstat (limited to 'arch/arm/mach-at91/at91sam9g45_devices.c')
| -rw-r--r-- | arch/arm/mach-at91/at91sam9g45_devices.c | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/arch/arm/mach-at91/at91sam9g45_devices.c b/arch/arm/mach-at91/at91sam9g45_devices.c index 22b455e1a9..35cd2e722b 100644 --- a/arch/arm/mach-at91/at91sam9g45_devices.c +++ b/arch/arm/mach-at91/at91sam9g45_devices.c @@ -18,6 +18,7 @@ #include <mach/board.h> #include <mach/gpio.h> #include <mach/io.h> +#include <i2c/i2c-gpio.h> #include "generic.h" @@ -132,6 +133,55 @@ void at91_add_device_nand(struct atmel_nand_data *data) void at91_add_device_nand(struct atmel_nand_data *data) {} #endif +/* -------------------------------------------------------------------- + * TWI (i2c) + * -------------------------------------------------------------------- */ +#if defined(CONFIG_I2C_GPIO) || defined(CONFIG_I2C_GPIO_MODULE) +static struct i2c_gpio_platform_data pdata_i2c0 = { + .sda_pin = AT91_PIN_PA20, + .sda_is_open_drain = 1, + .scl_pin = AT91_PIN_PA21, + .scl_is_open_drain = 1, + .udelay = 5, /* ~100 kHz */ +}; + +static struct i2c_gpio_platform_data pdata_i2c1 = { + .sda_pin = AT91_PIN_PB10, + .sda_is_open_drain = 1, + .scl_pin = AT91_PIN_PB11, + .scl_is_open_drain = 1, + .udelay = 5, /* ~100 kHz */ +}; + +void at91_add_device_i2c(short i2c_id, struct i2c_board_info *devices, int nr_devices) +{ + struct i2c_gpio_platform_data *pdata = &pdata_i2c; + + i2c_register_board_info(i2c_id, devices, nr_devices); + + switch (i2c_id) { + case 0; + pdata = &pdata_i2c0; + break; + case 1; + pdata = &pdata_i2c1; + break; + default: + return; + } + + at91_set_GPIO_periph(pdata->sda_pin, 1); /* TWD (SDA) */ + at91_set_multi_drive(pdata->sda_pin, 1); + + at91_set_GPIO_periph(pdata->scl_pin, 1); /* TWCK (SCL) */ + at91_set_multi_drive(pdata->scl_pin, 1); + + add_generic_device_res("i2c-gpio", i2c_id, NULL, 0, pdata); +} +#else +void at91_add_device_i2c(short i2c_id, struct i2c_board_info *devices, int nr_devices) {} +#endif + resource_size_t __init at91_configure_dbgu(void) { at91_set_A_periph(AT91_PIN_PB12, 0); /* DRXD */ |