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i2c: Add support for custom probe function

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The probe method used by i2c_new_probed_device() may not be suitable
for all cases. Let the caller provide its own, optional probe
function.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Jean Delvare
2010-08-11 18:20:56 +02:00
parent f1c2e33c29
commit 9a94241afc
11 changed files with 31 additions and 21 deletions
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16
drivers/i2c/i2c-core.c
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@@ -1464,14 +1464,18 @@ static int i2c_detect(struct i2c_adapter *adapter, struct i2c_driver *driver)
struct i2c_client *
i2c_new_probed_device(struct i2c_adapter *adap,
struct i2c_board_info *info,
unsigned short const *addr_list)
unsigned short const *addr_list,
int (*probe)(struct i2c_adapter *, unsigned short addr))
{
int i;
/* Stop here if the bus doesn't support probing */
if (!i2c_check_functionality(adap, I2C_FUNC_SMBUS_READ_BYTE)) {
dev_err(&adap->dev, "Probing not supported\n");
return NULL;
if (!probe) {
/* Stop here if the bus doesn't support probing */
if (!i2c_check_functionality(adap, I2C_FUNC_SMBUS_READ_BYTE)) {
dev_err(&adap->dev, "Probing not supported\n");
return NULL;
}
probe = i2c_default_probe;
}
for (i = 0; addr_list[i] != I2C_CLIENT_END; i++) {
@@ -1490,7 +1494,7 @@ i2c_new_probed_device(struct i2c_adapter *adap,
}
/* Test address responsiveness */
if (i2c_default_probe(adap, addr_list[i]))
if (probe(adap, addr_list[i]))
break;
}