[PATCH 1/3] pwm-core: fix compilation when OF is not selected

[Eric Bénard]

Le Sun, 29 Apr 2012 19:04:31 +0200,
Thierry Reding <thierry.reding at avionic-design.de> a écrit :

> * Eric Bénard wrote:
> > else we get the following error :
> > drivers/pwm/core.c: In function 'pwm_get':
> > drivers/pwm/core.c:538:3: error: implicit declaration of function 'of_pwm_request' [-Werror=implicit-function-declaration]
> > 
> > Signed-off-by: Eric Bénard <eric at eukrea.com>
> 
> This is solved a little differently in the latest patches. That no longer has
> the of_pwm_request() function protected by #ifdef CONFIG_OF, but rather calls
> it in a IS_ENABLED(CONFIG_OF)-protected block so that it will still receive
> compile coverage in !OF configurations but at the same time will be removed
> by the compiler's dead code elimination.
> 
OK this still doesn't work (using linux-2.6 at :
f7b006931751f029620ad2f8310ac7a1484fbdb4 ) leads to :
 CC      drivers/pwm/core.o drivers/pwm/core.c: In function
 'of_pwm_request': drivers/pwm/core.c:447:3: error: implicit
 declaration of function
 'of_property_match_string' [-Werror=implicit-function-declaration]
 drivers/pwm/core.c:452:2: error: implicit declaration of function
 'of_parse_phandle_with_args' [-Werror=implicit-function-declaration]

in include/linux/of.h the declaration of these function is inside
a #ifdef CONFIG_OF / #endif so I don't see how this can compile.

Eric