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| author | Jack Rosenthal <jrosenth@chromium.org> | 2019-07-11 18:17:34 -0600 |
|---|---|---|
| committer | Commit Bot <commit-bot@chromium.org> | 2019-07-17 21:45:18 +0000 |
| commit | f8d6179a26bf512c43638d0916fde0fc966cc3fb (patch) | |
| tree | d4df87ff4a738060d20f874eaa75cc3b2d24cdb9 /include | |
| parent | 21a255ea953e8ac64d05147ad7f11491db126cf4 (diff) | |
| download | chrome-ec-f8d6179a26bf512c43638d0916fde0fc966cc3fb.tar.gz | |
common: add i2c tracing functionality
crbug.com/982442 requests a way for developers to enable tracing of
i2c commands when debugging. This adds a new debug feature, the
i2ctrace command, which provides that. The command is guarded by
CONFIG_I2C_DEBUG.
BUG=chromium:982442
BRANCH=none
TEST=enabled CONFIG_I2C_DEBUG on arcada_ish, made sure that command
functioned as it says on the tin
Change-Id: I9c762271237cbf131e5ef7c0f605c89af4f209fd
Signed-off-by: Jack Rosenthal <jrosenth@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/1699347
Reviewed-by: Denis Brockus <dbrockus@chromium.org>
Reviewed-by: Jett Rink <jettrink@chromium.org>
Commit-Queue: Denis Brockus <dbrockus@chromium.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/i2c.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/include/i2c.h b/include/i2c.h index 057f38f2e8..566ae7b402 100644 --- a/include/i2c.h +++ b/include/i2c.h @@ -11,6 +11,7 @@ #include "common.h" #include "gpio.h" #include "host_command.h" +#include "stddef.h" /* Flags for slave address field, in addition to the 8-bit address */ #define I2C_FLAG_BIG_ENDIAN 0x100 /* 16 byte values are MSB-first */ @@ -426,4 +427,18 @@ void i2c_start_xfer_notify(int port, int slave_addr); */ void i2c_end_xfer_notify(int port, int slave_addr); +/** + * Defined in common/i2c_trace.c, used by i2c master to notify tracing + * funcionality of transactions. + * + * @param port: I2C port number + * @param slave_addr: slave device address + * @param direction: 0 for write, + * 1 for read + * @param data: pointer to data read or written + * @param size: size of data read or written + */ +void i2c_trace_notify(int port, int slave_addr, int direction, + const uint8_t *data, size_t size); + #endif /* __CROS_EC_I2C_H */ |