Duncan Laurie (dlaurie@chromium.org) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/17213
-gerrit
commit e8facd4e07b5ab41813d37e3980179b602b9fcf7 Author: Duncan Laurie dlaurie@chromium.org Date: Thu Nov 3 10:43:14 2016 -0700
lpss_i2c: Increase transaction timeout
When doing long transcations on an I2C bus at standard speed we saw that long transactions could go over the 4ms limit while waiting for the it to complete on the bus.
Increase this so we can use standard speed for testing and debug in firmware. (as there is no way to force standard speed in the kernel)
BUG=chrome-os-partner:58666 TEST=boot eve board with cr50 TPM and I2C bus at 100khz
Change-Id: I2987ae6a5aa024b373eb088767194c70b0918b6f Signed-off-by: Duncan Laurie dlaurie@chromium.org --- src/soc/intel/common/lpss_i2c.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/src/soc/intel/common/lpss_i2c.c b/src/soc/intel/common/lpss_i2c.c index 0174792..58d44b8 100644 --- a/src/soc/intel/common/lpss_i2c.c +++ b/src/soc/intel/common/lpss_i2c.c @@ -73,8 +73,8 @@ struct lpss_i2c_regs { uint32_t comp_type; } __attribute__((packed));
-/* Use a ~4ms timeout for various operations */ -#define LPSS_I2C_TIMEOUT_US 4000 +/* Use a ~10ms timeout for various operations */ +#define LPSS_I2C_TIMEOUT_US 10000
/* High and low times in different speed modes (in ns) */ enum {