Since the required clock to access registers is gated off in low power mode,
add ci->in_lpm check before try to dump registers value.
Signed-off-by: Li Jun <jun.li@xxxxxxxxxxxxx>
---
drivers/usb/chipidea/debug.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/usb/chipidea/debug.c b/drivers/usb/chipidea/debug.c
index 268e423..a367cee 100644
--- a/drivers/usb/chipidea/debug.c
+++ b/drivers/usb/chipidea/debug.c
@@ -339,6 +339,11 @@ static int ci_registers_show(struct seq_file *s, void *unused)
if (!ci)
return 0;
+ if (ci->in_lpm) {
+ seq_printf(s, "Can't dump registers value in low power mode\n");
+ return 0;
+ }
+
/* ------ Registers ----- */
tmp_reg = hw_read_intr_enable(ci);
seq_printf(s, "USBINTR reg: %08x\n", tmp_reg);
--
1.9.1
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