Add code to reset all reset signals as in gpio DT node. A reset property is an optional feature, so only print out a warning and do not fail if a reset property is not present.
If a reset property is discovered, then use it to deassert, thus bringing the IP out of reset.
Signed-off-by: Ley Foon Tan ley.foon.tan@intel.com
--- v2: - Move reset to probe() function. --- drivers/gpio/dwapb_gpio.c | 20 +++++++++++++++++++- 1 file changed, 19 insertions(+), 1 deletion(-)
diff --git a/drivers/gpio/dwapb_gpio.c b/drivers/gpio/dwapb_gpio.c index 7cf2d47..dfe1e6d 100644 --- a/drivers/gpio/dwapb_gpio.c +++ b/drivers/gpio/dwapb_gpio.c @@ -15,6 +15,7 @@ #include <dm/lists.h> #include <dm/root.h> #include <errno.h> +#include <reset.h>
DECLARE_GLOBAL_DATA_PTR;
@@ -99,13 +100,30 @@ static const struct dm_gpio_ops gpio_dwapb_ops = { .get_function = dwapb_gpio_get_function, };
+static void gpio_dwapb_reset(struct udevice *dev) +{ + struct reset_ctl_bulk reset_bulk; + int ret; + + ret = reset_get_bulk(dev, &reset_bulk); + if (ret) { + dev_warn(dev, "Can't get reset: %d\n", ret); + return; + } + + reset_deassert_bulk(&reset_bulk); +} + static int gpio_dwapb_probe(struct udevice *dev) { struct gpio_dev_priv *priv = dev_get_uclass_priv(dev); struct gpio_dwapb_platdata *plat = dev->platdata;
- if (!plat) + if (!plat) { + /* Reset on parent device only */ + gpio_dwapb_reset(dev); return 0; + }
priv->gpio_count = plat->pins; priv->bank_name = plat->name;