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i2c_probe: Make command easier to work with 

Instead of insisting on multiple parameters just use sane defaults.
This allows us to scan all addresses on all busses which is normally
what one wants to get an overview over devices on i2c busses.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Sascha Hauer 2015-11-11 16:57:51 +01:00
parent 901b13e243
commit a07652deb4
1 changed files with 37 additions and 19 deletions
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56
commands/i2c.c
View File

@ -22,30 +22,16 @@
#include <getopt.h>
#include <i2c/i2c.h>
static int do_i2c_probe(int argc, char *argv[])
static void i2c_probe_range(struct i2c_adapter *adapter, int startaddr, int stopaddr)
{
struct i2c_adapter *adapter;
struct i2c_client client;
int startaddr = -1, stopaddr = -1, addr, ret;
struct i2c_client client = {};
int addr;
int ret;
u8 reg;
if (argc < 4)
return COMMAND_ERROR_USAGE;
adapter = i2c_get_adapter(simple_strtoul(argv[1], NULL, 0));
if (!adapter)
return -ENODEV;
client.adapter = adapter;
startaddr = simple_strtol(argv[2], NULL, 0);
stopaddr = simple_strtol(argv[3], NULL, 0);
if ((startaddr == -1) || (stopaddr == -1) || (startaddr > stopaddr))
return COMMAND_ERROR_USAGE;
if (stopaddr > 0x7F)
stopaddr = 0x7F;
printf("probing i2c range 0x%02x - 0x%02x :\n", startaddr, stopaddr);
printf("probing i2c%d range 0x%02x-0x%02x: ", adapter->nr, startaddr, stopaddr);
for (addr = startaddr; addr <= stopaddr; addr++) {
client.addr = addr;
ret = i2c_write_reg(&client, 0x00, &reg, 0);
@ -53,6 +39,38 @@ static int do_i2c_probe(int argc, char *argv[])
printf("0x%02x ", addr);
}
printf("\n");
}
static int do_i2c_probe(int argc, char *argv[])
{
struct i2c_adapter *adapter = NULL;
int startaddr = 0, stopaddr = 0x7f;
if (argc > 1) {
adapter = i2c_get_adapter(simple_strtoul(argv[1], NULL, 0));
if (!adapter)
return -ENODEV;
}
if (argc > 2)
startaddr = simple_strtol(argv[2], NULL, 0);
if (argc > 3)
startaddr = simple_strtol(argv[3], NULL, 0);
if (startaddr > stopaddr)
return COMMAND_ERROR_USAGE;
if (stopaddr > 0x7F)
stopaddr = 0x7F;
if (adapter) {
i2c_probe_range(adapter, startaddr, stopaddr);
} else {
for_each_i2c_adapter(adapter)
i2c_probe_range(adapter, startaddr, stopaddr);
}
return 0;
}