i2c: mlxcpld: Decrease polling time for performance improvement

Decrease polling time 'MLXCPLD_I2C_POLL_TIME' from 2000 usec to 400
usec. It greatly improves performance of I2C transactions.

Reliability of setting polling time to 400 usec has been thoroughly
validated across all the supported systems.

Signed-off-by: Vadim Pasternak <vadimp@nvidia.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>

diff --git a/drivers/i2c/busses/i2c-mlxcpld.c b/drivers/i2c/busses/i2c-mlxcpld.c
index dbd1853..9e45214 100644 (file)
--- a/drivers/i2c/busses/i2c-mlxcpld.c
+++ b/drivers/i2c/busses/i2c-mlxcpld.c
@@ -25,7 +25,7 @@
 #define MLXCPLD_I2C_MAX_ADDR_LEN       4
 #define MLXCPLD_I2C_RETR_NUM           2
 #define MLXCPLD_I2C_XFER_TO            500000 /* usec */
-#define MLXCPLD_I2C_POLL_TIME          2000   /* usec */
+#define MLXCPLD_I2C_POLL_TIME          400   /* usec */
 
 /* LPC I2C registers */
 #define MLXCPLD_LPCI2C_CPBLTY_REG      0x0