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path: root/drivers/i2c/mxc_i2c.c
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Diffstat (limited to 'drivers/i2c/mxc_i2c.c')
-rw-r--r--drivers/i2c/mxc_i2c.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/i2c/mxc_i2c.c b/drivers/i2c/mxc_i2c.c
index eedad06..8e10fbb 100644
--- a/drivers/i2c/mxc_i2c.c
+++ b/drivers/i2c/mxc_i2c.c
@@ -49,10 +49,13 @@
#ifdef CONFIG_SYS_I2C_MX31_PORT1
#define I2C_BASE 0x43f80000
+#define I2C_CLK_OFFSET 26
#elif defined (CONFIG_SYS_I2C_MX31_PORT2)
#define I2C_BASE 0x43f98000
+#define I2C_CLK_OFFSET 28
#elif defined (CONFIG_SYS_I2C_MX31_PORT3)
#define I2C_BASE 0x43f84000
+#define I2C_CLK_OFFSET 30
#else
#error "define CONFIG_SYS_I2C_MX31_PORTx to use the mx31 I2C driver"
#endif
@@ -72,6 +75,9 @@ void i2c_init(int speed, int unused)
int freq = mx31_get_ipg_clk();
int i;
+ /* start the required I2C clock */
+ __REG(CCM_CGR0) = __REG(CCM_CGR0) | (3 << I2C_CLK_OFFSET);
+
for (i = 0; i < 0x1f; i++)
if (freq / div[i] <= speed)
break;