diff options
| author | Daisuke Nojiri <dnojiri@chromium.org> | 2014-10-29 11:14:53 -0700 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2015-04-10 11:57:59 +0200 |
| commit | 1fd91a19664a96022cc036fcb3f6d53fe7ff8868 (patch) | |
| tree | 205252062408aa4609bcfe749aec8e83c52a999d /src/drivers | |
| parent | 644afa70478483144e31e08857c66c83765737fb (diff) | |
tpm: allow 0 as valid i2c bus number
tpm driver uses bus=0 as indication of uninitialized tpm device. this
change allows 0 as a valid i2c bus number.
BUG=None
BRANCH=ToT
TEST=Built cosmos.
Change-Id: Ie8d285abff11643cc3efc0fa30e4afcc3ca1c0d5
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 493077b68cf46b08f0d1ddfe57bf6064d714d537
Original-Change-Id: Iac55e88db4ef757a292270e7201d8fdd37a90b50
Original-Signed-off-by: Daisuke Nojiri <dnojiri@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/226294
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/9405
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Diffstat (limited to 'src/drivers')
| -rw-r--r-- | src/drivers/i2c/tpm/tpm.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/src/drivers/i2c/tpm/tpm.c b/src/drivers/i2c/tpm/tpm.c index bc36e3587c..dc4ab78149 100644 --- a/src/drivers/i2c/tpm/tpm.c +++ b/src/drivers/i2c/tpm/tpm.c @@ -86,13 +86,14 @@ static const char * const chip_name[] = { /* Structure to store I2C TPM specific stuff */ struct tpm_inf_dev { - unsigned bus; + int bus; unsigned int addr; uint8_t buf[TPM_BUFSIZE + sizeof(uint8_t)]; // max. buffer size + addr enum i2c_chip_type chip_type; }; static struct tpm_inf_dev tpm_dev = { + .bus = -1, .addr = TPM_I2C_ADDR }; @@ -115,7 +116,7 @@ static int iic_tpm_read(uint8_t addr, uint8_t *buffer, size_t len) int rc; int count; - if (!tpm_dev.bus) + if (tpm_dev.bus < 0) return -1; if ((tpm_dev.chip_type == SLB9635) || (tpm_dev.chip_type == UNKNOWN)) { /* slb9635 protocol should work in both cases */ @@ -186,7 +187,7 @@ static int iic_tpm_write_generic(uint8_t addr, uint8_t *buffer, size_t len, tpm_dev.buf[0] = addr; memcpy(&(tpm_dev.buf[1]), buffer, len); - if (!tpm_dev.bus) + if (tpm_dev.bus < 0) return -1; for (count = 0; count < max_count; count++) { rc = i2c_write_raw(tpm_dev.bus, tpm_dev.addr, |