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Add / enable I2C support on the spc1920 board

This commit is contained in:
Markus Klotzbuecher 2007-01-09 14:57:10 +01:00 committed by Markus Klotzbuecher
parent d28707dbce
commit 3f34f86916
1 changed files with 25 additions and 3 deletions
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28
include/configs/spc1920.h
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@ -89,6 +89,7 @@
| CFG_CMD_PING \
| CFG_CMD_DHCP \
| CFG_CMD_IMMAP \
| CFG_CMD_I2C \
| CFG_CMD_MII)
/* & ~( CFG_CMD_NET)) */
@ -197,9 +198,30 @@
* I2C configuration
*/
#if (CONFIG_COMMANDS & CFG_CMD_I2C)
#define CONFIG_HARD_I2C 1 /* I2C with hardware support */
#define CFG_I2C_SPEED 400000 /* I2C speed and slave address defaults */
#define CFG_I2C_SLAVE 0x7F
/* enable I2C and select the hardware/software driver */
#undef CONFIG_HARD_I2C /* I2C with hardware support */
#define CONFIG_SOFT_I2C 1 /* I2C bit-banged */
#define CFG_I2C_SPEED 93000 /* 93 kHz is supposed to work */
#define CFG_I2C_SLAVE 0xFE
#ifdef CONFIG_SOFT_I2C
/*
* 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(2) /* 1/4 I2C clock duration */
#endif /* CONFIG_SOFT_I2C */
#endif
/*-----------------------------------------------------------------------