From: Peter Chen <peter.chen@xxxxxxxxxxxxx>
During the initialization, it needs to disable all interrupts
enable bit as well as clear all interrupts status bits to avoid
exceptional interrupt.
Tested-by: Marek Vasut <marex@xxxxxxx>
Signed-off-by: Peter Chen <peter.chen@xxxxxxxxxxxxx>
Signed-off-by: Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx>
---
drivers/usb/chipidea/core.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/chipidea/core.c b/drivers/usb/chipidea/core.c
index ab01e18..e9cfd31 100644
--- a/drivers/usb/chipidea/core.c
+++ b/drivers/usb/chipidea/core.c
@@ -199,6 +199,12 @@ static int hw_device_init(struct ci_hdrc *ci, void __iomem *base)
if (ci->hw_ep_max > ENDPT_MAX)
return -ENODEV;
+ /* Disable all interrupts bits */
+ hw_write(ci, OP_USBINTR, 0xffffffff, 0);
+
+ /* Clear all interrupts status bits*/
+ hw_write(ci, OP_USBSTS, 0xffffffff, 0xffffffff);
+
dev_dbg(ci->dev, "ChipIdea HDRC found, lpm: %d; cap: %p op: %p\n",
ci->hw_bank.lpm, ci->hw_bank.cap, ci->hw_bank.op);
@@ -434,8 +440,11 @@ static void ci_get_otg_capable(struct ci_hdrc *ci)
ci->is_otg = (hw_read(ci, CAP_DCCPARAMS,
DCCPARAMS_DC | DCCPARAMS_HC)
== (DCCPARAMS_DC | DCCPARAMS_HC));
- if (ci->is_otg)
+ if (ci->is_otg) {
dev_dbg(ci->dev, "It is OTG capable controller\n");
+ ci_disable_otg_interrupt(ci, OTGSC_INT_EN_BITS);
+ ci_clear_otg_interrupt(ci, OTGSC_INT_STATUS_BITS);
+ }
}
static int ci_hdrc_probe(struct platform_device *pdev)
--
1.8.4.rc2
--
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