diff options
Diffstat (limited to 'include/configs/RPXlite.h')
| -rw-r--r-- | include/configs/RPXlite.h | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/include/configs/RPXlite.h b/include/configs/RPXlite.h index 2813256..ada7e14 100644 --- a/include/configs/RPXlite.h +++ b/include/configs/RPXlite.h @@ -46,6 +46,36 @@ #undef CONFIG_SYS_LOADS_BAUD_CHANGE /* don't allow baudrate change */ #define CONFIG_BZIP2 /* Include support for bzip2 compressed images */ + +/* enable I2C and select the hardware/software driver */ +#define CONFIG_SYS_I2C +#define CONFIG_SYS_I2C_SOFT /* I2C bit-banged */ +#define CONFIG_SYS_I2C_SOFT_SPEED 40000 /* 40 kHz is supposed to work */ +#define CONFIG_SYS_I2C_SOFT_SLAVE 0xFE +/* Software (bit-bang) I2C driver configuration */ +#define PB_SCL 0x00000020 /* PB 26 */ +#define PB_SDA 0x00000010 /* PB 27 */ + +#define I2C_INIT (immr->im_cpm.cp_pbdir |= PB_SCL) +#define I2C_ACTIVE (immr->im_cpm.cp_pbdir |= PB_SDA) +#define I2C_TRISTATE (immr->im_cpm.cp_pbdir &= ~PB_SDA) +#define I2C_READ ((immr->im_cpm.cp_pbdat & PB_SDA) != 0) +#define I2C_SDA(bit) if (bit) \ + immr->im_cpm.cp_pbdat |= PB_SDA; \ + else \ + immr->im_cpm.cp_pbdat &= ~PB_SDA +#define I2C_SCL(bit) if (bit) \ + immr->im_cpm.cp_pbdat |= PB_SCL; \ + else \ + immr->im_cpm.cp_pbdat &= ~PB_SCL +#define I2C_DELAY udelay(5) /* 1/4 I2C clock duration */ + +/* M41T11 Serial Access Timekeeper(R) SRAM */ +#define CONFIG_RTC_M41T11 1 +#define CONFIG_SYS_I2C_RTC_ADDR 0x68 +/* play along with the linux driver */ +#define CONFIG_SYS_M41T11_BASE_YEAR 1900 + #undef CONFIG_WATCHDOG /* watchdog disabled */ /* |