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| author | Simon Glass <sjg@chromium.org> | 2015-07-03 00:15:39 (GMT) |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2015-08-06 02:57:51 (GMT) |
| commit | 7d7db2225c5e63a389ee04d63919f012e7ba880d (patch) | |
| tree | 66f8381e57291bc502753c87f1461dbe4a05b325 | |
| parent | d82ba4c0b457f0cb30da7bbee935aad7793e5fac (diff) | |
| download | u-boot-7d7db2225c5e63a389ee04d63919f012e7ba880d.tar.xz | |
dm: i2c: Add a message debug function
Add a way to dump the contents of an I2C message for debugging purposes.
Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Heiko Schocher <hs@denx.de>
| -rw-r--r-- | drivers/i2c/i2c-uclass.c | 16 | ||||
| -rw-r--r-- | include/i2c.h | 10 |
2 files changed, 26 insertions, 0 deletions
diff --git a/drivers/i2c/i2c-uclass.c b/drivers/i2c/i2c-uclass.c index eaba965..42d6e89 100644 --- a/drivers/i2c/i2c-uclass.c +++ b/drivers/i2c/i2c-uclass.c @@ -18,6 +18,22 @@ DECLARE_GLOBAL_DATA_PTR; #define I2C_MAX_OFFSET_LEN 4 +/* Useful debugging function */ +void i2c_dump_msgs(struct i2c_msg *msg, int nmsgs) +{ + int i; + + for (i = 0; i < nmsgs; i++) { + struct i2c_msg *m = &msg[i]; + + printf(" %s %x len=%x", m->flags & I2C_M_RD ? "R" : "W", + msg->addr, msg->len); + if (!(m->flags & I2C_M_RD)) + printf(": %x", m->buf[0]); + printf("\n"); + } +} + /** * i2c_setup_offset() - Set up a new message with a chip offset * diff --git a/include/i2c.h b/include/i2c.h index 9300d97..a5498a3 100644 --- a/include/i2c.h +++ b/include/i2c.h @@ -473,6 +473,16 @@ int i2c_get_chip_for_busnum(int busnum, int chip_addr, uint offset_len, int i2c_chip_ofdata_to_platdata(const void *blob, int node, struct dm_i2c_chip *chip); +/** + * i2c_dump_msgs() - Dump a list of I2C messages + * + * This may be useful for debugging. + * + * @msg: Message list to dump + * @nmsgs: Number of messages + */ +void i2c_dump_msgs(struct i2c_msg *msg, int nmsgs); + #ifndef CONFIG_DM_I2C /* |