[alsa-devel] [PATCH/RFC] gpio: add GPIOF_ values regardless on kconfig settings
randy.dunlap at oracle.com
Tue May 24 06:58:39 CEST 2011
On 05/23/11 18:50, Mark Brown wrote:
> On Mon, May 23, 2011 at 06:21:51PM -0700, Randy Dunlap wrote:
>> On 05/23/11 17:08, Mark Brown wrote:
>>> No, really we should. The GPIO APIs are stubbed out when not in use for
>>> a very good reason, think about the usability here. The goal here isn't
>>> to litter the code with ifdefs - if architectures aren't able to keep up
>>> with API changes they should convert to using gpiolib so this stuff
>>> happens automatically (indeed, I can't think of any good reason for an
>>> architecture to not be using gpiolib at this point).
>> No, I would say that there are a lot of drivers in sound/soc/codecs/
>> that are missing some GPIO pieces in the Kconfig file.
> Have you actually looked at the code here? Vanishingly few of the
> drivers need GPIOs at all, they can just optionally use GPIOs if the
> system makes them available. There is absolutely no dependency on GPIOs
> for them, anything in Kconfig would be entirely unconstructive.
>>>> MODULE_AUTHOR("Mark Brown <broonie at opensource.wolfsonmicro.com>");
>>> You've clearly not looked at MAINTAINERS for this one.
>> It's not listed in the MAINTAINERS file.
> MAINTAINERS has a pattern sound/soc/codecs/wm*.
Thanks for that hint.
>> But maybe you mean scripts/get_maintainer.pl, which I did try.
>> I found that using git log <that source file name> was better info
>> than using scripts/get_maintainer.pl.
> get_maintainers is just a script that reads MAINTAINERS and trawls logs
> for it; the reason I mentioned MAINTAINERs was that you were saying you
> didn't use git. In general you're better off doing things by hand
> rather than using get_maintainers.
OK, I didn't mean to get into a blame game on this.
You mentioned stubs earlier and that's what is not working AFAICT.
Below is a patch that makes the 2 reported drivers build when
CONFIG_GPIOLIB is disabled and CONFIG_GENERIC_GPIO is disabled.
What do you think of the patch?
From: Randy Dunlap <randy.dunlap at oracle.com>
Make GPIOF_ defined values available even when GPIOLIB nor GENERIC_GPIO
is enabled by moving them to <linux/gpio.h>.
Signed-off-by: Randy Dunlap <randy.dunlap at oracle.com>
include/asm-generic/gpio.h | 10 ----------
include/linux/gpio.h | 11 +++++++++++
2 files changed, 11 insertions(+), 10 deletions(-)
@@ -170,16 +170,6 @@ extern int __gpio_cansleep(unsigned gpio
extern int __gpio_to_irq(unsigned gpio);
-#define GPIOF_DIR_OUT (0 << 0)
-#define GPIOF_DIR_IN (1 << 0)
-#define GPIOF_INIT_LOW (0 << 1)
-#define GPIOF_INIT_HIGH (1 << 1)
-#define GPIOF_IN (GPIOF_DIR_IN)
-#define GPIOF_OUT_INIT_LOW (GPIOF_DIR_OUT | GPIOF_INIT_LOW)
-#define GPIOF_OUT_INIT_HIGH (GPIOF_DIR_OUT | GPIOF_INIT_HIGH)
* struct gpio - a structure describing a GPIO with configuration
* @gpio: the GPIO number
@@ -3,6 +3,17 @@
/* see Documentation/gpio.txt */
+/* make these flag values available regardless of GPIO kconfig options */
+#define GPIOF_DIR_OUT (0 << 0)
+#define GPIOF_DIR_IN (1 << 0)
+#define GPIOF_INIT_LOW (0 << 1)
+#define GPIOF_INIT_HIGH (1 << 1)
+#define GPIOF_IN (GPIOF_DIR_IN)
+#define GPIOF_OUT_INIT_LOW (GPIOF_DIR_OUT | GPIOF_INIT_LOW)
+#define GPIOF_OUT_INIT_HIGH (GPIOF_DIR_OUT | GPIOF_INIT_HIGH)
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