From: Bin Meng <bmeng.cn@gmail.com>
Date: Fri, 5 Jul 2019 16:23:15 +0000 (-0700)
Subject: dm: timer: Skip device that does not have a valid ofnode in pre_probe()
X-Git-Tag: v2019.10-rc1~14^2~8
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=7efb4a6e09421a8ceaaaff61e28905ddec0c02a5;p=oweals%2Fu-boot.git

dm: timer: Skip device that does not have a valid ofnode in pre_probe()

It is possible that a timer device has a null ofnode, hence there is
no need to further parse DT for the clock rate.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
---

diff --git a/drivers/timer/timer-uclass.c b/drivers/timer/timer-uclass.c
index 12ee6eb804..97a4c74851 100644
--- a/drivers/timer/timer-uclass.c
+++ b/drivers/timer/timer-uclass.c
@@ -48,6 +48,10 @@ static int timer_pre_probe(struct udevice *dev)
 	int err;
 	ulong ret;
 
+	/* It is possible that a timer device has a null ofnode */
+	if (!dev_of_valid(dev))
+		return 0;
+
 	err = clk_get_by_index(dev, 0, &timer_clk);
 	if (!err) {
 		ret = clk_get_rate(&timer_clk);