diff options
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, |