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gpio: add function check_dir_flags

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Add a dir flags validity check with a new function
check_dir_flags.

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Patrick Delaunay 2020-01-13 11:35:04 +01:00 committed by Tom Rini
parent 788ea83412
commit 4292fb16bf
1 changed files with 25 additions and 0 deletions
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25
drivers/gpio/gpio-uclass.c
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@ -5,6 +5,7 @@
#include <common.h>
#include <dm.h>
#include <dm/device_compat.h>
#include <dm/device-internal.h>
#include <dm/lists.h>
#include <dm/uclass-internal.h>
@ -510,12 +511,36 @@ int dm_gpio_set_value(const struct gpio_desc *desc, int value)
return 0;
}
/* check dir flags invalid configuration */
static int check_dir_flags(ulong flags)
{
if ((flags & GPIOD_IS_OUT) && (flags & GPIOD_IS_IN)) {
log_debug("%s: flags 0x%lx has GPIOD_IS_OUT and GPIOD_IS_IN\n",
__func__, flags);
return -EINVAL;
}
return 0;
}
static int _dm_gpio_set_dir_flags(struct gpio_desc *desc, ulong flags)
{
struct udevice *dev = desc->dev;
struct dm_gpio_ops *ops = gpio_get_ops(dev);
struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
int ret = 0;
ret = check_dir_flags(flags);
if (ret) {
dev_dbg(dev,
"%s error: set_dir_flags for gpio %s%d has invalid dir flags 0x%lx\n",
desc->dev->name,
uc_priv->bank_name ? uc_priv->bank_name : "",
desc->offset, flags);
return ret;
}
if (flags & GPIOD_IS_OUT) {
int value = flags & GPIOD_IS_OUT_ACTIVE ? 1 : 0;