From: Wen Wang <wen.w.wang@xxxxxxxxx>
Added some minor changes/fixes after verification on the board.
Signed-off-by: Wen Wang <wen.w.wang@xxxxxxxxx>
Signed-off-by: Alan Cox <alan@xxxxxxxxxxxxxxx>
---
drivers/i2c/busses/i2c-mrst.c | 9 +++++----
1 files changed, 5 insertions(+), 4 deletions(-)
diff --git a/drivers/i2c/busses/i2c-mrst.c b/drivers/i2c/busses/i2c-mrst.c
index 974c189..5da3ca5 100644
--- a/drivers/i2c/busses/i2c-mrst.c
+++ b/drivers/i2c/busses/i2c-mrst.c
@@ -90,6 +90,7 @@ static int mrst_i2c_disable(struct i2c_adapter *adap)
int count = 0;
int ret1, ret2;
+ static const u16 delay[NUM_SPEEDS] = {100, 25, 3};
/* Set IC_ENABLE to 0 */
mrst_i2c_write(i2c->base + IC_ENABLE, 0);
@@ -98,7 +99,7 @@ static int mrst_i2c_disable(struct i2c_adapter *adap)
dev_dbg(&adap->dev, "mrst i2c disable\n");
while ((ret1 = mrst_i2c_read(i2c->base + IC_ENABLE_STATUS) & 0x1)
|| (ret2 = mrst_i2c_read(i2c->base + IC_STATUS) & 0x1)) {
- udelay(i2c->speed);
+ udelay(delay[i2c->speed]);
mrst_i2c_write(i2c->base + IC_ENABLE, 0);
dev_dbg(&adap->dev, "i2c is busy, count is %d speed %d\n",
count, i2c->speed);
@@ -159,9 +160,9 @@ static int mrst_i2c_hwinit(struct mrst_i2c_private *i2c)
mrst_i2c_write(i2c->base + IC_CON,
(i2c->speed + 1) << 1 | SLV_DIS | RESTART | MASTER_EN);
- mrst_i2c_write(i2c->base + IC_SS_SCL_HCNT,
+ mrst_i2c_write(i2c->base + (IC_SS_SCL_HCNT + (i2c->speed << 3)),
hcnt[i2c->platform][i2c->speed]);
- mrst_i2c_write(i2c->base + IC_SS_SCL_LCNT,
+ mrst_i2c_write(i2c->base + (IC_SS_SCL_LCNT + (i2c->speed << 3)),
lcnt[i2c->platform][i2c->speed]);
/* Set tranmit & receive FIFO threshold to zero */
@@ -410,7 +411,7 @@ static int mrst_i2c_setup(struct i2c_adapter *adap, struct i2c_msg *pmsg)
return -ETIMEDOUT;
}
- mode = 1 + (i2c->speed << 1);
+ mode = (1 + i2c->speed) << 1;
/* set the speed mode */
reg_val = mrst_i2c_read(i2c->base + IC_CON);
if ((reg_val & 0x06) != mode) {
--
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