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-rw-r--r--src/soc/intel/common/Kconfig8
-rw-r--r--src/soc/intel/common/lpss_i2c.c13
2 files changed, 21 insertions, 0 deletions
diff --git a/src/soc/intel/common/Kconfig b/src/soc/intel/common/Kconfig
index 7726bf121f..8eae23b6e7 100644
--- a/src/soc/intel/common/Kconfig
+++ b/src/soc/intel/common/Kconfig
@@ -62,6 +62,14 @@ config SOC_INTEL_COMMON_LPSS_I2C_CLOCK_MHZ
No default is set here as this is an SOC-specific value and must
be provided by the SOC when it selects this driver.
+config SOC_INTEL_COMMON_LPSS_I2C_DEBUG
+ bool "Enable debug output for LPSS I2C transactions"
+ default n
+ depends on SOC_INTEL_COMMON_LPSS_I2C
+ help
+ Enable debug output for I2C transactions. This can be useful
+ when debugging I2C drivers.
+
config MMA
bool "enable MMA (Memory Margin Analysis) support"
default n
diff --git a/src/soc/intel/common/lpss_i2c.c b/src/soc/intel/common/lpss_i2c.c
index 76c3d14d70..01747926d0 100644
--- a/src/soc/intel/common/lpss_i2c.c
+++ b/src/soc/intel/common/lpss_i2c.c
@@ -265,6 +265,11 @@ int platform_i2c_transfer(unsigned bus, struct i2c_seg *segments, int count)
/* Process each segment */
while (count--) {
+ if (CONFIG_SOC_INTEL_COMMON_LPSS_I2C_DEBUG)
+ printk(BIOS_DEBUG, "i2c %u:%02x %s %d bytes : ",
+ bus, segments->chip, segments->read ? "R" : "W",
+ segments->len);
+
/* Set target slave address */
write32(&regs->target_addr, segments->chip);
@@ -283,6 +288,14 @@ int platform_i2c_transfer(unsigned bus, struct i2c_seg *segments, int count)
goto out;
}
}
+
+ if (CONFIG_SOC_INTEL_COMMON_LPSS_I2C_DEBUG) {
+ int j;
+ for (j = 0; j < segments->len; j++)
+ printk(BIOS_DEBUG, "%02x ", segments->buf[j]);
+ printk(BIOS_DEBUG, "\n");
+ }
+
segments++;
}