From 7d7db2225c5e63a389ee04d63919f012e7ba880d Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Thu, 2 Jul 2015 18:15:39 -0600 Subject: [PATCH] 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 Acked-by: Heiko Schocher --- drivers/i2c/i2c-uclass.c | 16 ++++++++++++++++ include/i2c.h | 10 ++++++++++ 2 files changed, 26 insertions(+) diff --git a/drivers/i2c/i2c-uclass.c b/drivers/i2c/i2c-uclass.c index eaba965fa3..42d6e89e9d 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 9300d97e14..a5498a327a 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 /* -- 2.39.5