[PATCH] fsl_i2c: Added a callpoint for i2c_board_late_init

[Richard Retanubun]

This patch adds a callpoint in i2c_init that allows board specific
i2c board initialization (typically for i2c bus reset) that is called
after i2c_init operations, allowing the i2c_board_late_init function
to use the pre-configured i2c bus speed and slave address.
---

 v2: Adds missing function prototype declaration in include/i2c.h

 drivers/i2c/fsl_i2c.c |    8 ++++++++
 include/i2c.h         |    3 +++
 2 files changed, 11 insertions(+), 0 deletions(-)

diff --git a/drivers/i2c/fsl_i2c.c b/drivers/i2c/fsl_i2c.c
index 2241990..a1a62fa 100644
--- a/drivers/i2c/fsl_i2c.c
+++ b/drivers/i2c/fsl_i2c.c
@@ -249,6 +249,14 @@ i2c_init(int speed, int slaveadd)
 	writeb(0x0, &dev->sr);			/* clear status register */
 	writeb(I2C_CR_MEN, &dev->cr);		/* start I2C controller */
 #endif
+
+#ifdef CONFIG_SYS_I2C_BOARD_LATE_INIT
+	/* Call board specific i2c bus reset routine after the bus has been   */
+	/* initialized. Use either this callpoint or i2c_init_board; which is */
+	/* called before i2c_init operations.                                 */
+	/* For details about this problem see doc/I2C_Edge_Conditions.        */
+	i2c_board_late_init();
+#endif
 }
 
 static int
diff --git a/include/i2c.h b/include/i2c.h
index d828964..cd23c8a 100644
--- a/include/i2c.h
+++ b/include/i2c.h
@@ -111,6 +111,9 @@ void i2c_init(int speed, int slaveaddr);
 #ifdef CONFIG_SYS_I2C_INIT_BOARD
 void i2c_init_board(void);
 #endif
+#ifdef CONFIG_SYS_I2C_BOARD_LATE_INIT
+void i2c_board_late_init(void);
+#endif
 
 #if defined(CONFIG_I2C_MUX)
 
-- 
1.7.0