[U-Boot] [PATCH 02/55] dm: i2c: Add a message debug function

[Heiko Schocher denx <hs@denx.de>]

Hello Simon,

Am 03.07.2015 um 02:15 schrieb Simon Glass:
> Add a way to dump the contents of an I2C message for debugging purposes.
>
> Signed-off-by: Simon Glass <sjg@chromium.org>
> ---
>
>   drivers/i2c/i2c-uclass.c | 16 ++++++++++++++++
>   include/i2c.h            | 10 ++++++++++
>   2 files changed, 26 insertions(+)

Acked-by: Heiko Schocher <hs@denx.de>

bye,
Heiko
>
> 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
>
>   /*
>

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