[PATCH 2/2] i2c: Added switch for allowing usage 16bit register addresses

[Sascha Hauer]

On Fri, May 11, 2012 at 10:58:49PM +0400, Alexander Shiyan wrote:
> ---
>  commands/i2c.c |   26 +++++++++++++++++---------
>  1 files changed, 17 insertions(+), 9 deletions(-)
> 

Applied and realized afterwards that you forgot to sign off your
patches. Please resend this one, I'll replace it.

Sascha

> diff --git a/commands/i2c.c b/commands/i2c.c
> index 39bae35..1eaa968 100644
> --- a/commands/i2c.c
> +++ b/commands/i2c.c
> @@ -74,10 +74,10 @@ static int do_i2c_write(int argc, char *argv[])
>  {
>  	struct i2c_adapter *adapter = NULL;
>  	struct i2c_client client;
> -	int addr = -1, reg = -1, count = -1, verbose = 0, ret, opt, i, bus = 0;
> +	int addr = -1, reg = -1, count = -1, verbose = 0, ret, opt, i, bus = 0, wide = 0;
>  	u8 *buf;
>  
> -	while ((opt = getopt(argc, argv, "a:b:r:v")) > 0) {
> +	while ((opt = getopt(argc, argv, "a:b:r:v:w")) > 0) {
>  		switch (opt) {
>  		case 'a':
>  			addr = simple_strtol(optarg, NULL, 0);
> @@ -91,6 +91,9 @@ static int do_i2c_write(int argc, char *argv[])
>  		case 'v':
>  			verbose = 1;
>  			break;
> +		case 'w':
> +			wide = 1;
> +			break;
>  		}
>  	}
>  
> @@ -112,13 +115,13 @@ static int do_i2c_write(int argc, char *argv[])
>  	for (i = 0; i < count; i++)
>  		*(buf + i) = (char) simple_strtol(argv[optind+i], NULL, 16);
>  
> -	ret = i2c_write_reg(&client, reg, buf, count);
> +	ret = i2c_write_reg(&client, reg | (wide ? I2C_ADDR_16_BIT : 0), buf, count);
>  	if (ret != count)
>  		goto out;
>  	ret = 0;
>  
>  	if (verbose) {
> -		printf("wrote %i bytes starting at reg 0x%02x to i2cdev 0x%02x on bus %i\n",
> +		printf("wrote %i bytes starting at reg 0x%04x to i2cdev 0x%02x on bus %i\n",
>  			count, reg, addr, adapter->nr);
>  		for (i = 0; i < count; i++)
>  			printf("0x%02x ", *(buf + i));
> @@ -135,7 +138,8 @@ static const __maybe_unused char cmd_i2c_write_help[] =
>  "write to i2c device.\n"
>  "  -a 0x<addr>   i2c device address\n"
>  "  -b <bus_num>  i2c bus number (default = 0)\n"
> -"  -r 0x<reg>    start register\n";
> +"  -r 0x<reg>    start register\n"
> +"  -w            use 16bit-wide address access\n";
>  
>  BAREBOX_CMD_START(i2c_write)
>  	.cmd		= do_i2c_write,
> @@ -148,9 +152,9 @@ static int do_i2c_read(int argc, char *argv[])
>  	struct i2c_adapter *adapter = NULL;
>  	struct i2c_client client;
>  	u8 *buf;
> -	int count = -1, addr = -1, reg = -1, verbose = 0, ret, opt, bus = 0;
> +	int count = -1, addr = -1, reg = -1, verbose = 0, ret, opt, bus = 0, wide = 0;
>  
> -	while ((opt = getopt(argc, argv, "a:b:c:r:v")) > 0) {
> +	while ((opt = getopt(argc, argv, "a:b:c:r:v:w")) > 0) {
>  		switch (opt) {
>  		case 'a':
>  			addr = simple_strtol(optarg, NULL, 0);
> @@ -167,6 +171,9 @@ static int do_i2c_read(int argc, char *argv[])
>  		case 'v':
>  			verbose = 1;
>  			break;
> +		case 'w':
> +			wide = 1;
> +			break;
>  		}
>  	}
>  
> @@ -183,11 +190,11 @@ static int do_i2c_read(int argc, char *argv[])
>  	client.addr = addr;
>  
>  	buf = xmalloc(count);
> -	ret = i2c_read_reg(&client, reg, buf, count);
> +	ret = i2c_read_reg(&client, reg | (wide ? I2C_ADDR_16_BIT : 0), buf, count);
>  	if (ret == count) {
>  		int i;
>  		if (verbose)
> -			printf("read %i bytes starting at reg 0x%02x from i2cdev 0x%02x on bus %i\n",
> +			printf("read %i bytes starting at reg 0x%04x from i2cdev 0x%02x on bus %i\n",
>  				count, reg, addr, adapter->nr);
>  		for (i = 0; i < count; i++)
>  			printf("0x%02x ", *(buf + i));
> @@ -205,6 +212,7 @@ static const __maybe_unused char cmd_i2c_read_help[] =
>  "  -a 0x<addr>   i2c device address\n"
>  "  -b <bus_num>  i2c bus number (default = 0)\n"
>  "  -r 0x<reg>    start register\n"
> +"  -w            use 16bit-wide address access\n"
>  "  -c <count>    byte count\n";
>  
>  BAREBOX_CMD_START(i2c_read)
> -- 
> 1.7.3.4
> 
> 
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> 

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