[U-Boot] [PATCH] fdt: Include arch specific gpio.h

[Michal Simek]

On 07/11/2012 12:59 PM, Simon Glass wrote:
> Hi,
>
> On Wed, Jul 11, 2012 at 12:43 PM, Michal Simek <monstr at monstr.eu <mailto:monstr at monstr.eu>> wrote:
>
>     On 07/11/2012 11:59 AM, Simon Glass wrote:
>
>         Hi Michal,
>
>
>         On Wed, Jul 11, 2012 at 10:19 AM, Michal Simek <monstr at monstr.eu <mailto:monstr at monstr.eu> <mailto:monstr at monstr.eu <mailto:monstr at monstr.eu>>> wrote:
>
>              On 07/10/2012 11:13 PM, Simon Glass wrote:
>
>                  Hi Michal,
>
>
>                  On Tue, Jul 10, 2012 at 11:56 AM, Michal Simek <monstr at monstr.eu <mailto:monstr at monstr.eu> <mailto:monstr at monstr.eu <mailto:monstr at monstr.eu>> <mailto:monstr at monstr.eu <mailto:monstr at monstr.eu> <mailto:monstr at monstr.eu <mailto:monstr at monstr.eu>>>> wrote:
>
>                       Also include arch specific gpio.h which can contain
>                       gpio function implementation.
>
>                       Signed-off-by: Michal Simek <monstr at monstr.eu <mailto:monstr at monstr.eu> <mailto:monstr at monstr.eu <mailto:monstr at monstr.eu>> <mailto:monstr at monstr.eu <mailto:monstr at monstr.eu> <mailto:monstr at monstr.eu <mailto:monstr at monstr.eu>>>>
>                       CC: Simon Glass <sjg at chromium.org <mailto:sjg at chromium.org> <mailto:sjg at chromium.org <mailto:sjg at chromium.org>> <mailto:sjg at chromium.org <mailto:sjg at chromium.org> <mailto:sjg at chromium.org <mailto:sjg at chromium.org>>>>
>
>
>                       ---
>                         lib/fdtdec.c |    1 +
>                         1 files changed, 1 insertions(+), 0 deletions(-)
>
>                       diff --git a/lib/fdtdec.c b/lib/fdtdec.c
>                       index cc09e06..b12eb77 100644
>                       --- a/lib/fdtdec.c
>                       +++ b/lib/fdtdec.c
>                       @@ -25,6 +25,7 @@
>                         #include <fdtdec.h>
>
>                         /* we need the generic GPIO interface here */
>                       +#include <asm/gpio.h>
>
>
>                  Can you not instead support the generic functions? What are you missing from from there that fdtdec.c needs?
>
>
>              OK. The problem is with fdtdec_setup_gpio function where you called gpio_request which
>              is gpio specific function which you haven't included.
>
>              The most archs have this defined in arch/<cpuname>/include/asm/____gpio.h.
>
>
>
>         This is there in my tree. Please see commit:
>
>         5f533aeb gpio: Modify common gpio.h to more closely match Linux
>
>
>     This is generic gpio cleanup but I don't think this is the same thing.
>     I think you should get some warnings for fdtdec compilation around missing gpio_request
>     declaration or you include gpio.h in any other header file which is in fdtdec.c/h.
>
>
> Sorry I don't really understand that. For me fdtdec.c has #include <asm-generic/gpio.h> and that is enough to get gpio_request(). Can you please advise what warning you see and for what board?

Microblaze:
lib/libgeneric.o: In function `fdtdec_setup_gpio':
/mnt/projects/u-boot/lib/fdtdec.c:477: undefined reference to `gpio_request'

The same error will be for nios2, openrisc and blackfin because they define
gpio_request as static inline function in arch/<arch>/include/asm/gpio.h

Because I think there should be asm/gpio.h included which can include asm-generic/gpio.h
(this is arm case).

diff --git a/lib/fdtdec.c b/lib/fdtdec.c
index cc09e06..50a5061 100644
--- a/lib/fdtdec.c
+++ b/lib/fdtdec.c
@@ -25,7 +25,7 @@
  #include <fdtdec.h>

  /* we need the generic GPIO interface here */
-#include <asm-generic/gpio.h>
+#include <asm/gpio.h>

  DECLARE_GLOBAL_DATA_PTR;


Thanks,
Michal







-- 
Michal Simek, Ing. (M.Eng)
w: www.monstr.eu p: +42-0-721842854
Maintainer of Linux kernel 2.6 Microblaze Linux - http://www.monstr.eu/fdt/
Microblaze U-BOOT custodian