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i2c: Allow i2c_add_numbered_adapter() to assign a bus id

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Currently, if an i2c bus driver supports both static and dynamic bus
ids, it needs to choose between calling i2c_add_numbered_adapter() and
i2c_add_adapter().  This patch makes i2c_add_numbered_adapter()
redirect to i2c_add_adapter() if the requested bus id is -1.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
This commit is contained in:
Grant Likely 2011-07-25 17:49:43 +02:00 committed by Jean Delvare
parent 3fea5df41d
commit 488bf314bf
4 changed files with 10 additions and 14 deletions
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7
drivers/i2c/busses/i2c-cpm.c
View File

@ -662,11 +662,8 @@ static int __devinit cpm_i2c_probe(struct platform_device *ofdev)
/* register new adapter to i2c module... */
data = of_get_property(ofdev->dev.of_node, "linux,i2c-index", &len);
if (data && len == 4) {
cpm->adap.nr = *data;
result = i2c_add_numbered_adapter(&cpm->adap);
} else
result = i2c_add_adapter(&cpm->adap);
cpm->adap.nr = (data && len == 4) ? be32_to_cpup(data) : -1;
result = i2c_add_numbered_adapter(&cpm->adap);
if (result < 0) {
dev_err(&ofdev->dev, "Unable to register with I2C\n");

7
drivers/i2c/busses/i2c-pxa.c
View File

@ -1079,7 +1079,7 @@ static int i2c_pxa_probe(struct platform_device *dev)
* The reason to do so is to avoid sysfs names that only make
* sense when there are multiple adapters.
*/
i2c->adap.nr = dev->id != -1 ? dev->id : 0;
i2c->adap.nr = dev->id;
snprintf(i2c->adap.name, sizeof(i2c->adap.name), "pxa_i2c-i2c.%u",
i2c->adap.nr);
@ -1142,10 +1142,7 @@ static int i2c_pxa_probe(struct platform_device *dev)
i2c->adap.dev.of_node = dev->dev.of_node;
#endif
if (i2c_type == REGS_CE4100)
ret = i2c_add_adapter(&i2c->adap);
else
ret = i2c_add_numbered_adapter(&i2c->adap);
ret = i2c_add_numbered_adapter(&i2c->adap);
if (ret < 0) {
printk(KERN_INFO "I2C: Failed to add bus\n");
goto eadapt;

5
drivers/i2c/busses/i2c-s6000.c
View File

@ -341,10 +341,7 @@ static int __devinit s6i2c_probe(struct platform_device *dev)
i2c_wr16(iface, S6_I2C_TXTL, 0);
platform_set_drvdata(dev, iface);
if (bus_num < 0)
rc = i2c_add_adapter(p_adap);
else
rc = i2c_add_numbered_adapter(p_adap);
rc = i2c_add_numbered_adapter(p_adap);
if (rc)
goto err_irq_free;
return 0;

5
drivers/i2c/i2c-core.c
View File

@ -925,6 +925,9 @@ EXPORT_SYMBOL(i2c_add_adapter);
* or otherwise built in to the system's mainboard, and where i2c_board_info
* is used to properly configure I2C devices.
*
* If the requested bus number is set to -1, then this function will behave
* identically to i2c_add_adapter, and will dynamically assign a bus number.
*
* If no devices have pre-been declared for this bus, then be sure to
* register the adapter before any dynamically allocated ones. Otherwise
* the required bus ID may not be available.
@ -940,6 +943,8 @@ int i2c_add_numbered_adapter(struct i2c_adapter *adap)
int id;
int status;
if (adap->nr == -1) /* -1 means dynamically assign bus id */
return i2c_add_adapter(adap);
if (adap->nr & ~MAX_ID_MASK)
return -EINVAL;