Add code to reset all reset signals as in usb 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/usb/host/dwc2.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+)
diff --git a/drivers/usb/host/dwc2.c b/drivers/usb/host/dwc2.c index cbe065b..b77e0c6 100644 --- a/drivers/usb/host/dwc2.c +++ b/drivers/usb/host/dwc2.c @@ -15,6 +15,7 @@ #include <wait_bit.h> #include <asm/io.h> #include <power/regulator.h> +#include <reset.h>
#include "dwc2.h"
@@ -1124,12 +1125,28 @@ int _submit_int_msg(struct dwc2_priv *priv, struct usb_device *dev, } }
+static void dwc2_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 dwc2_init_common(struct udevice *dev, struct dwc2_priv *priv) { struct dwc2_core_regs *regs = priv->regs; uint32_t snpsid; int i, j;
+ dwc2_reset(dev); + snpsid = readl(®s->gsnpsid); dev_info(dev, "Core Release: %x.%03x\n", snpsid >> 12 & 0xf, snpsid & 0xfff);