diff options
| author | Chris Ching <chingcodes@chromium.org> | 2018-01-16 11:38:17 -0800 |
|---|---|---|
| committer | Chris Ching <chingcodes@chromium.org> | 2018-02-01 16:35:20 +0000 |
| commit | 1f2735782901608656436b2b3e3a5fa9a77a441e (patch) | |
| tree | d06349065977f0e28f99fe353f5105479dbac06b /src/drivers | |
| parent | 65d78e880a6eeeaeb084ec2dd37c2126b952df6d (diff) | |
| download | coreboot-1f2735782901608656436b2b3e3a5fa9a77a441e.tar.xz | |
drivers/i2c/designware: Unset IC_ENABLE when setting target address
To set address on AMD, IC_ENABLE == 0.
BUG=b:69416132
BRANCH=none
TEST=Test communication with i2c TPM on grunt and coral
Change-Id: I7faee8e11439deceab946cc82d30d274b529b90d
Signed-off-by: Chris Ching <chingcodes@chromium.org>
Reviewed-on: https://review.coreboot.org/23293
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Subrata Banik <subrata.banik@intel.com>
Diffstat (limited to 'src/drivers')
| -rw-r--r-- | src/drivers/i2c/designware/dw_i2c.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/src/drivers/i2c/designware/dw_i2c.c b/src/drivers/i2c/designware/dw_i2c.c index 384cca5783..af769ca02e 100644 --- a/src/drivers/i2c/designware/dw_i2c.c +++ b/src/drivers/i2c/designware/dw_i2c.c @@ -379,7 +379,11 @@ int dw_i2c_transfer(unsigned int bus, } /* Set target slave address */ - write32(®s->target_addr, segments->slave); + if (read32(®s->target_addr) != segments->slave) { + dw_i2c_disable(regs); + write32(®s->target_addr, segments->slave); + dw_i2c_enable(regs); + } /* Read or write each byte in segment */ for (byte = 0; byte < segments->len; byte++) { |