Merge "usb: dwc3: Check USB LPM status before accessing registers" (ebbb2c4e) · Commits · e / devices / android_kernel_xiaomi_sm6125

drivers/usb/dwc3/debugfs.c

+28 −1

Original line number	Diff line number	Diff line
		@@ -285,6 +285,32 @@ static const struct debugfs_reg32 dwc3_regs[] = {
		dump_register(OSTS),
		};

		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;
		@@ -1018,7 +1044,8 @@ void dwc3_debugfs_init(struct dwc3 *dwc)
		dwc->regset->nregs = ARRAY_SIZE(dwc3_regs);
		dwc->regset->base = dwc->regs - DWC3_GLOBALS_REGS_START;

		file = debugfs_create_regset32("regdump", S_IRUGO, root, dwc->regset);
		file = debugfs_create_file("regdump", 0444, root, dwc,
		&dwc3_regdump_fops);
		if (!file)
		dev_dbg(dwc->dev, "Can't create debugfs regdump\n");