diff options
| author | Simon Glass <sjg@chromium.org> | 2021-02-05 07:22:07 +0300 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2021-03-03 23:40:11 +0300 |
| commit | d638a183572dd58899250deb6b5ea2009ce05dc3 (patch) | |
| tree | 8f06253a12e4a364aa51092ca31423a6e97b3910 /drivers/gpio | |
| parent | edab114775e91def9c1695518876e461f76a0e1f (diff) | |
| download | u-boot-d638a183572dd58899250deb6b5ea2009ce05dc3.tar.xz | |
gpio: sandbox: Track whether a GPIO is driven
Add a new flag to keep track of whether sandbox is driving the pin, or
whether it is expecting an input signal. If it is driving, then the value
of the pin is the value being driven (0 or 1). If not driving, then we
consider the value 0, since we don't currently handle things like pull-ups
yet.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Diffstat (limited to 'drivers/gpio')
| -rw-r--r-- | drivers/gpio/sandbox.c | 21 |
1 files changed, 15 insertions, 6 deletions
diff --git a/drivers/gpio/sandbox.c b/drivers/gpio/sandbox.c index d1e561ab5e..700098446b 100644 --- a/drivers/gpio/sandbox.c +++ b/drivers/gpio/sandbox.c @@ -76,16 +76,22 @@ static int set_gpio_flag(struct udevice *dev, unsigned int offset, ulong flag, int sandbox_gpio_get_value(struct udevice *dev, unsigned offset) { struct gpio_state *state = get_gpio_state(dev, offset); + bool val; if (get_gpio_flag(dev, offset, GPIOD_IS_OUT)) debug("sandbox_gpio: get_value on output gpio %u\n", offset); - return state->flags & GPIOD_EXT_HIGH ? true : false; + if (state->flags & GPIOD_EXT_DRIVEN) + val = state->flags & GPIOD_EXT_HIGH; + else + val = false; + + return val; } int sandbox_gpio_set_value(struct udevice *dev, unsigned offset, int value) { - set_gpio_flag(dev, offset, GPIOD_EXT_HIGH, value); + set_gpio_flag(dev, offset, GPIOD_EXT_DRIVEN | GPIOD_EXT_HIGH, value); return 0; } @@ -142,8 +148,8 @@ static int sb_gpio_direction_output(struct udevice *dev, unsigned offset, ret = sandbox_gpio_set_direction(dev, offset, 1); if (ret) return ret; - ret = set_gpio_flag(dev, offset, GPIOD_IS_OUT_ACTIVE | GPIOD_EXT_HIGH, - value); + ret = set_gpio_flag(dev, offset, GPIOD_IS_OUT_ACTIVE | + GPIOD_EXT_DRIVEN | GPIOD_EXT_HIGH, value); if (ret) return ret; @@ -171,8 +177,8 @@ static int sb_gpio_set_value(struct udevice *dev, unsigned offset, int value) return -1; } - ret = set_gpio_flag(dev, offset, GPIOD_IS_OUT_ACTIVE | GPIOD_EXT_HIGH, - value); + ret = set_gpio_flag(dev, offset, GPIOD_IS_OUT_ACTIVE | + GPIOD_EXT_DRIVEN | GPIOD_EXT_HIGH, value); if (ret) return ret; @@ -218,10 +224,13 @@ static int sb_gpio_set_flags(struct udevice *dev, unsigned int offset, struct gpio_state *state = get_gpio_state(dev, offset); if (flags & GPIOD_IS_OUT) { + flags |= GPIOD_EXT_DRIVEN; if (flags & GPIOD_IS_OUT_ACTIVE) flags |= GPIOD_EXT_HIGH; else flags &= ~GPIOD_EXT_HIGH; + } else { + flags |= state->flags & GPIOD_SANDBOX_MASK; } state->flags = flags; |