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Merge "usb: dwc3: Check USB LPM status before accessing registers"

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qctecmdr 2019-10-29 14:49:07 -07:00 • committed by Gerrit - the friendly Code Review server
commit 933e892ba9
1 changed files with 27 additions and 1 deletions
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28
drivers/usb/dwc3/debugfs.c
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@ -393,6 +393,32 @@ static const struct file_operations dwc3_lsp_fops = {
.release = single_release,
};
static int dwc3_regdump_show(struct seq_file *s, void *unused)
{
struct dwc3 *dwc = s->private;
if (atomic_read(&dwc->in_lpm)) {
seq_puts(s, "USB device is powered off\n");
return 0;
}
debugfs_print_regs32(s, dwc->regset->regs, dwc->regset->nregs,
dwc->regset->base, "");
return 0;
}
static int dwc3_regdump_open(struct inode *inode, struct file *file)
{
return single_open(file, dwc3_regdump_show, inode->i_private);
}
static const struct file_operations dwc3_regdump_fops = {
.open = dwc3_regdump_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static int dwc3_mode_show(struct seq_file *s, void *unused)
{
struct dwc3 *dwc = s->private;
@ -1168,7 +1194,7 @@ void dwc3_debugfs_init(struct dwc3 *dwc)
dwc->root = root;
debugfs_create_regset32("regdump", S_IRUGO, root, dwc->regset);
debugfs_create_file("regdump", 0444, root, dwc, &dwc3_regdump_fops);
debugfs_create_file("lsp_dump", S_IRUGO | S_IWUSR, root, dwc,
&dwc3_lsp_fops);