On 08/15/2015 01:23 PM, Wolfram Sang wrote:
> On Tue, Jun 16, 2015 at 10:28:12AM -0700, York Sun wrote:
>> Based on i2c-mux-gpio driver, similarly the register based mux
>> switch from one bus to another by setting a single register.
>> The register can be on PCIe bus, local bus, or any memory-mapped
>> address.
>>
>> Signed-off-by: York Sun <[email protected]>
>> CC: Wolfram Sang <[email protected]>
>> CC: Peter Korsgaard <[email protected]>
>
> Mostly good.
>
>> +static int i2c_mux_reg_probe(struct platform_device *pdev)
>> +{
>> + struct regmux *mux;
>> + struct i2c_adapter *parent;
>> + struct resource *res;
>> + int (*deselect)(struct i2c_adapter *, void *, u32);
>> + unsigned int initial_state, class;
>
> gcc says:
>
> drivers/i2c/muxes/i2c-mux-reg.c:182:15: warning: variable 'initial_state' set
> but not used [-Wunused-but-set-variable]
>
> It seens you prepared for setting the initial state but don't do the
> actual set?
Thanks for catching this. I set the initial state variable but used another
variable when it is actually used. Kernel Makefile disables
unused-but-set-variable by default. How did you enable this warning without
being flooded by the warnings? (I tried W=1)
>
>> +static struct platform_driver i2c_mux_reg_driver = {
>> + .probe = i2c_mux_reg_probe,
>> + .remove = i2c_mux_reg_remove,
>> + .driver = {
>> + .owner = THIS_MODULE,
>
> coccicheck says:
>
> drivers/i2c/muxes/i2c-mux-reg.c:288:3-8: No need to set .owner here. The core
> will do it.
Will drop it in next version.
York
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