Adrian Bunk wrote:
>The patch to i2c-core.c is strange:
>
>
>
>
>>--- linux-v31/drivers/i2c/i2c-core.c 2004-02-19 19:31:07.000000000 -0600
>>+++ linux/drivers/i2c/i2c-core.c 2004-03-10 09:48:08.000000000 -0600
>>@@ -1256,6 +1256,12 @@
>> return (func & adap_func) == func;
>> }
>>
>>+int i2c_spin_delay;
>>+void i2c_set_spin_delay(int val)
>>+{
>>+ i2c_spin_delay = val;
>>+}
>>+
>> EXPORT_SYMBOL(i2c_add_adapter);
>> EXPORT_SYMBOL(i2c_del_adapter);
>> EXPORT_SYMBOL(i2c_add_driver);
>>@@ -1292,6 +1298,8 @@
>>
>> EXPORT_SYMBOL(i2c_get_functionality);
>> EXPORT_SYMBOL(i2c_check_functionality);
>>+EXPORT_SYMBOL(i2c_set_spin_delay);
>>+EXPORT_SYMBOL(i2c_spin_delay);
>>
>> MODULE_AUTHOR("Simon G. Vogl <simon at tk.uni-linz.ac.at>");
>> MODULE_DESCRIPTION("I2C-Bus main module");
>>...
>>
>>
>
>
>You can either add get/set functions and export them (more an OO
>paradigm) or export the variable.
>
>If you export the variable, it's quite useless to add such a set
>function since everyone can set the variable directly.
>
I think the point is that lower-level drivers need to use this variable
(because of its use in the include file), but it's better to set it with
a function from external code.
Todd, am I correct here?
-Corey
