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 --- drivers/gpio/dwapb_gpio.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+)
diff --git a/drivers/gpio/dwapb_gpio.c b/drivers/gpio/dwapb_gpio.c index 3b5c181..e2b6e69 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;
@@ -114,6 +115,20 @@ static int gpio_dwapb_probe(struct udevice *dev) return 0; }
+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_bind(struct udevice *dev) { struct gpio_dwapb_platdata *plat = dev_get_platdata(dev); @@ -126,6 +141,8 @@ static int gpio_dwapb_bind(struct udevice *dev) if (plat) return 0;
+ gpio_dwapb_reset(dev); + base = dev_read_addr(dev); if (base == FDT_ADDR_T_NONE) { debug("Can't get the GPIO register base address\n");