From 345c26bc3284ef6596c55e80112342e4f319843c Mon Sep 17 00:00:00 2001 From: Philippe Langlais Date: Mon, 21 Mar 2011 11:31:20 +0100 Subject: i2c-nomadik: Add code to retry on timeout failure and set i2c clock to 400KHz It is seen that i2c-nomadik controller randomly stops generating the interrupts leading to a i2c timeout. As a workaround to this problem add retries, to the on going transfer on failure. Since this behaviour does not get changed with a wait for longer duration, the timeout can be reduced to a lower value, leading to a quicker retry attempt. ST-Ericsson ID: ER 325661 Signed-off-by: Virupax Sadashivpetimath Change-Id: Ic9db2b15ff5ce7e656cbbdfeb19270da9e32f9d1 Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/16972 Tested-by: Virupax SADASHIVPETIMATH Reviewed-by: Jonas ABERG --- drivers/i2c/busses/i2c-nomadik.c | 4 ---- 1 file changed, 4 deletions(-) (limited to 'drivers') diff --git a/drivers/i2c/busses/i2c-nomadik.c b/drivers/i2c/busses/i2c-nomadik.c index a0cfe9e0ec4..398bce2d5c7 100644 --- a/drivers/i2c/busses/i2c-nomadik.c +++ b/drivers/i2c/busses/i2c-nomadik.c @@ -251,8 +251,6 @@ static int init_hw(struct nmk_i2c_dev *dev) { int stat; - clk_enable(dev->clk); - stat = flush_i2c_fifo(dev); if (stat) goto exit; @@ -267,8 +265,6 @@ static int init_hw(struct nmk_i2c_dev *dev) dev->cli.operation = I2C_NO_OPERATION; exit: - clk_disable(dev->clk); - udelay(I2C_DELAY); return stat; } -- cgit v1.2.3