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i2c: designware: Modify timing parameters for amdpsp mailbox 

Adjust retry period and timeout values for x86-PSP mailbox based on the
typical I2C traffic generated by PSP. In order to limit the possibility
of timeouts, x86 should reduce the interval between retries as well as
increase overall time after which it gives up.

Signed-off-by: Jan Dabros <jsd@semihalf.com>
Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
This commit is contained in:
Jan Dabros 2022-04-28 14:26:51 +02:00 committed by Wolfram Sang
parent 1621fe09fe
commit be18ce150a
1 changed files with 2 additions and 2 deletions
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4
drivers/i2c/busses/i2c-designware-amdpsp.c
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@ -16,8 +16,8 @@
#define PSP_CMD_TIMEOUT_US (500 * USEC_PER_MSEC)
#define PSP_I2C_REQ_BUS_CMD 0x64
#define PSP_I2C_REQ_RETRY_CNT 10
#define PSP_I2C_REQ_RETRY_DELAY_US (50 * USEC_PER_MSEC)
#define PSP_I2C_REQ_RETRY_CNT 400
#define PSP_I2C_REQ_RETRY_DELAY_US (25 * USEC_PER_MSEC)
#define PSP_I2C_REQ_STS_OK 0x0
#define PSP_I2C_REQ_STS_BUS_BUSY 0x1
#define PSP_I2C_REQ_STS_INV_PARAM 0x3