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authorAlexandre Courbot <acourbot@nvidia.com>2013-10-17 10:21:37 -0700
committerLinus Walleij <linus.walleij@linaro.org>2013-10-19 23:24:52 +0200
commitaf8b6375a8291fe2cf77707f3edec86b98a999cc (patch)
tree2e4970d4e726411586dbc2143f27ba49ff50142e /drivers/gpio
parent79a9becda8940deb2274b5aa4577c86d52ee7ecb (diff)
downloadop-kernel-dev-af8b6375a8291fe2cf77707f3edec86b98a999cc.zip
op-kernel-dev-af8b6375a8291fe2cf77707f3edec86b98a999cc.tar.gz
gpiolib: port of_ functions to use gpiod
Refactor the of_ functions of gpiolib to use the now public gpiod interface, and export of_get_named_gpiod_flags() and of_get_gpiod_flags() functions. Signed-off-by: Alexandre Courbot <acourbot@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/gpio')
-rw-r--r--drivers/gpio/gpiolib-of.c28
1 files changed, 17 insertions, 11 deletions
diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c
index 0dfaf20..32a396d 100644
--- a/drivers/gpio/gpiolib-of.c
+++ b/drivers/gpio/gpiolib-of.c
@@ -15,19 +15,21 @@
#include <linux/errno.h>
#include <linux/module.h>
#include <linux/io.h>
-#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_gpio.h>
#include <linux/pinctrl/pinctrl.h>
#include <linux/slab.h>
+struct gpio_desc;
+
/* Private data structure for of_gpiochip_find_and_xlate */
struct gg_data {
enum of_gpio_flags *flags;
struct of_phandle_args gpiospec;
- int out_gpio;
+ struct gpio_desc *out_gpio;
};
/* Private function for resolving node pointer to gpio_chip */
@@ -45,28 +47,31 @@ static int of_gpiochip_find_and_xlate(struct gpio_chip *gc, void *data)
if (ret < 0)
return false;
- gg_data->out_gpio = ret + gc->base;
+ gg_data->out_gpio = gpio_to_desc(ret + gc->base);
return true;
}
/**
- * of_get_named_gpio_flags() - Get a GPIO number and flags to use with GPIO API
+ * of_get_named_gpiod_flags() - Get a GPIO descriptor and flags for GPIO API
* @np: device node to get GPIO from
* @propname: property name containing gpio specifier(s)
* @index: index of the GPIO
* @flags: a flags pointer to fill in
*
- * Returns GPIO number to use with Linux generic GPIO API, or one of the errno
+ * Returns GPIO descriptor to use with Linux GPIO API, or one of the errno
* value on the error condition. If @flags is not NULL the function also fills
* in flags for the GPIO.
*/
-int of_get_named_gpio_flags(struct device_node *np, const char *propname,
- int index, enum of_gpio_flags *flags)
+struct gpio_desc *of_get_named_gpiod_flags(struct device_node *np,
+ const char *propname, int index, enum of_gpio_flags *flags)
{
/* Return -EPROBE_DEFER to support probe() functions to be called
* later when the GPIO actually becomes available
*/
- struct gg_data gg_data = { .flags = flags, .out_gpio = -EPROBE_DEFER };
+ struct gg_data gg_data = {
+ .flags = flags,
+ .out_gpio = ERR_PTR(-EPROBE_DEFER)
+ };
int ret;
/* .of_xlate might decide to not fill in the flags, so clear it. */
@@ -78,16 +83,17 @@ int of_get_named_gpio_flags(struct device_node *np, const char *propname,
if (ret) {
pr_debug("%s: can't parse gpios property of node '%s[%d]'\n",
__func__, np->full_name, index);
- return ret;
+ return ERR_PTR(ret);
}
gpiochip_find(&gg_data, of_gpiochip_find_and_xlate);
of_node_put(gg_data.gpiospec.np);
- pr_debug("%s exited with status %d\n", __func__, gg_data.out_gpio);
+ pr_debug("%s exited with status %d\n", __func__,
+ PTR_RET(gg_data.out_gpio));
return gg_data.out_gpio;
}
-EXPORT_SYMBOL(of_get_named_gpio_flags);
+EXPORT_SYMBOL(of_get_named_gpiod_flags);
/**
* of_gpio_simple_xlate - translate gpio_spec to the GPIO number and flags
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