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| author | Duncan Laurie <dlaurie@chromium.org> | 2016-09-12 11:21:40 -0700 |
|---|---|---|
| committer | Aaron Durbin <adurbin@chromium.org> | 2016-09-14 22:24:06 +0200 |
| commit | f8a7b2c008f45e91e8bc52fbe2d4e0083dab250b (patch) | |
| tree | f5d5388981df059f009de6c07c7dbf3fcbff6900 | |
| parent | 772555a214e023c6e3dd267d296bef23242f3638 (diff) | |
| download | coreboot-f8a7b2c008f45e91e8bc52fbe2d4e0083dab250b.tar.xz | |
lpss_i2c: Add Kconfig option to enable debug
It is very useful to have the ability to see I2C transactions
performed by the host firmware. This patch adds a simple
Kconfig option that will enable debug output.
Change-Id: I55f1ff273290e2f4fbfaea56091b2df3fc49fe61
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: https://review.coreboot.org/16590
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>
| -rw-r--r-- | src/soc/intel/common/Kconfig | 8 | ||||
| -rw-r--r-- | src/soc/intel/common/lpss_i2c.c | 13 |
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(®s->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++; } |