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fdt: Add function for decoding multiple gpios globally available

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Samsung's SDHCI bindings require multiple gpios to be parsed and
configured at a time. Export the already available fdtdec_decode_gpios
for this purpose.

Signed-off-by: Abhilash Kesavan <a.kesavan@samsung.com>
Commit-Ready: Che-Liang Chiou <clchiou@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Abhilash Kesavan 2012-10-25 16:31:01 +00:00 • committed by Gerald Van Baren
parent f20c461984
commit 5921f6a292
2 changed files with 18 additions and 3 deletions
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16
include/fdtdec.h
View file

@ -344,6 +344,22 @@ int fdtdec_get_bool(const void *blob, int node, const char *prop_name);
int fdtdec_decode_gpio(const void *blob, int node, const char *prop_name, int fdtdec_decode_gpio(const void *blob, int node, const char *prop_name,
struct fdt_gpio_state *gpio); struct fdt_gpio_state *gpio);
/**
* Decode a list of GPIOs from an FDT. This creates a list of GPIOs with no
* terminating item.
*
* @param blob FDT blob to use
* @param node Node to look at
* @param prop_name Node property name
* @param gpio Array of gpio elements to fill from FDT. This will be
* untouched if either 0 or an error is returned
* @param max_count Maximum number of elements allowed
* @return number of GPIOs read if ok, -FDT_ERR_BADLAYOUT if max_count would
* be exceeded, or -FDT_ERR_NOTFOUND if the property is missing.
*/
int fdtdec_decode_gpios(const void *blob, int node, const char *prop_name,
struct fdt_gpio_state *gpio, int max_count);
/** /**
* Set up a GPIO pin according to the provided gpio information. At present this * Set up a GPIO pin according to the provided gpio information. At present this
* just requests the GPIO. * just requests the GPIO.

5
lib/fdtdec.c
View file

@ -426,9 +426,8 @@ int fdtdec_get_bool(const void *blob, int node, const char *prop_name)
* @return number of GPIOs read if ok, -FDT_ERR_BADLAYOUT if max_count would * @return number of GPIOs read if ok, -FDT_ERR_BADLAYOUT if max_count would
* be exceeded, or -FDT_ERR_NOTFOUND if the property is missing. * be exceeded, or -FDT_ERR_NOTFOUND if the property is missing.
*/ */
static int fdtdec_decode_gpios(const void *blob, int node, int fdtdec_decode_gpios(const void *blob, int node, const char *prop_name,
const char *prop_name, struct fdt_gpio_state *gpio, struct fdt_gpio_state *gpio, int max_count)
int max_count)
{ {
const struct fdt_property *prop; const struct fdt_property *prop;
const u32 *cell; const u32 *cell;