i2c: mlxcpld: Reduce polling time for performance improvement

vadimp-nvidia · wsakernel · commit 669b2e4aa1a8 · 2021-10-04T21:57:14.000+02:00
Decrease polling time 'MLXCPLD_I2C_POLL_TIME' from 400 usec to 200
usec. It improves performance of I2C transactions.

Reliability of setting polling time to 200 usec has been validated
across all the supported systems.

Signed-off-by: Vadim Pasternak &lt;vadimp@nvidia.com&gt;
Signed-off-by: Wolfram Sang &lt;wsa@kernel.org&gt;
diff --git a/drivers/i2c/busses/i2c-mlxcpld.c b/drivers/i2c/busses/i2c-mlxcpld.c
@@ -27,7 +27,7 @@
 #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		400   /* usec */
+#define MLXCPLD_I2C_POLL_TIME		200   /* usec */
 
 /* LPC I2C registers */
 #define MLXCPLD_LPCI2C_CPBLTY_REG	0x0
