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authorPatrick Delaunay <patrick.delaunay@st.com>2020-01-13 11:35:08 +0100
committerTom Rini <trini@konsulko.com>2020-04-16 23:06:54 -0400
commitd2c07e56ab3ef0cec99335aa8dafbed691d23739 (patch)
treef23a6222c259271f9fa8ddaa5d9114a6a668df5a /drivers/gpio
parent477ca57b9a53120a14bdca356612fce15211345d (diff)
gpio: add ops to get dir flags
Add the ops for GPIO driver get_dir_flags(), allows to get dynamically the current gpio configuration; it is used by the API function dm_gpio_get_dir_flags(). When these optional ops are absent, the gpio uclass continues to use the mandatory ops (direction_output, direction_input, get_value) and value of desc->flags to manage only the main dir flags: - GPIOD_IS_IN - GPIOD_IS_OUT - GPIOD_IS_OUT_ACTIVE - GPIOD_ACTIVE_LOW Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com> Reviewed-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'drivers/gpio')
-rw-r--r--drivers/gpio/gpio-uclass.c31
1 files changed, 25 insertions, 6 deletions
diff --git a/drivers/gpio/gpio-uclass.c b/drivers/gpio/gpio-uclass.c
index 25263994d2..84e5013cce 100644
--- a/drivers/gpio/gpio-uclass.c
+++ b/drivers/gpio/gpio-uclass.c
@@ -614,19 +614,36 @@ int dm_gpio_set_dir(struct gpio_desc *desc)
int dm_gpio_get_dir_flags(struct gpio_desc *desc, ulong *flags)
{
- int ret;
+ struct udevice *dev = desc->dev;
+ int ret, value;
+ struct dm_gpio_ops *ops = gpio_get_ops(dev);
ulong dir_flags;
ret = check_reserved(desc, "get_dir_flags");
if (ret)
return ret;
- dir_flags = desc->flags;
- /* only GPIOD_IS_OUT_ACTIVE is provided by uclass */
- dir_flags &= ~GPIOD_IS_OUT_ACTIVE;
- if ((desc->flags & GPIOD_IS_OUT) && _gpio_get_value(desc))
- dir_flags |= GPIOD_IS_OUT_ACTIVE;
+ /* GPIOD_ are directly provided by driver except GPIOD_ACTIVE_LOW */
+ if (ops->get_dir_flags) {
+ ret = ops->get_dir_flags(dev, desc->offset, &dir_flags);
+ if (ret)
+ return ret;
+ /* GPIOD_ACTIVE_LOW is saved in desc->flags */
+ value = dir_flags & GPIOD_IS_OUT_ACTIVE ? 1 : 0;
+ if (desc->flags & GPIOD_ACTIVE_LOW)
+ value = !value;
+ dir_flags &= ~(GPIOD_ACTIVE_LOW | GPIOD_IS_OUT_ACTIVE);
+ dir_flags |= (desc->flags & GPIOD_ACTIVE_LOW);
+ if (value)
+ dir_flags |= GPIOD_IS_OUT_ACTIVE;
+ } else {
+ dir_flags = desc->flags;
+ /* only GPIOD_IS_OUT_ACTIVE is provided by uclass */
+ dir_flags &= ~GPIOD_IS_OUT_ACTIVE;
+ if ((desc->flags & GPIOD_IS_OUT) && _gpio_get_value(desc))
+ dir_flags |= GPIOD_IS_OUT_ACTIVE;
+ }
*flags = dir_flags;
return 0;
@@ -1129,6 +1146,8 @@ static int gpio_post_bind(struct udevice *dev)
ops->get_function += gd->reloc_off;
if (ops->xlate)
ops->xlate += gd->reloc_off;
+ if (ops->get_dir_flags)
+ ops->get_dir_flags += gd->reloc_off;
reloc_done++;
}