This patch adds the possibility to call a board specific i2c bus reset routine for the fsl_i2c bus driver, and adds this option for the keymile kmeter1 board.
Signed-off-by: Heiko Schocher hs@denx.de
board/keymile/common/common.c | 14 ++++++++++++++ drivers/i2c/fsl_i2c.c | 6 ++++++ include/configs/kmeter1.h | 1 + 3 files changed, 21 insertions(+), 0 deletions(-)
diff --git a/board/keymile/common/common.c
b/board/keymile/common/common.c
index 17312b5..a282421 100644 --- a/board/keymile/common/common.c +++ b/board/keymile/common/common.c @@ -421,6 +421,7 @@ static int get_scl (void)
#endif
+#if !defined(CONFIG_KMETER1) static void writeStartSeq (void) { set_sda (1); @@ -471,6 +472,7 @@ static int i2c_make_abort (void) get_sda (); return ret; } +#endif
/**
- i2c_init_board - reset i2c bus. When the board is powercycled during
a
@@ -478,6 +480,17 @@ static int i2c_make_abort (void) */ void i2c_init_board(void) { +#if defined(CONFIG_KMETER1)
- struct fsl_i2c *dev;
- dev = (struct fsl_i2c *) (CONFIG_SYS_IMMR + CONFIG_SYS_I2C_OFFSET);
- uchar dummy;
- out_8 (&dev->cr, (I2C_CR_MSTA));
- out_8 (&dev->cr, (I2C_CR_MEN | I2C_CR_MSTA));
- dummy = in_8(&dev->dr);
- out_8 (&dev->cr, (I2C_CR_MEN));
Are you sure this will generate a proper I2C reset sequence? We also use this controller and I tried to do it too but didn't find a way. I then asked Freescale and they could not come up with a solution either.
Jocke