This is a note to let you know that I've just added the patch titled
Fix serial console on SNI RM400 machines
to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
fix-serial-console-on-sni-rm400-machines.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Mon Apr 9 17:09:24 CEST 2018
From: Thomas Bogendoerfer <tsbogend@xxxxxxxxxxxxxxxx>
Date: Wed, 31 May 2017 22:21:03 +0200
Subject: Fix serial console on SNI RM400 machines
From: Thomas Bogendoerfer <tsbogend@xxxxxxxxxxxxxxxx>
[ Upstream commit e279e6d98e0cf2c2fe008b3c29042b92f0e17b1d ]
sccnxp driver doesn't get the correct uart clock rate, if CONFIG_HAVE_CLOCK
is disabled. Correct usage of clk API to make it work with/without it.
Fixes: 90efa75f7ab0 (serial: sccnxp: Using CLK API for getting UART clock)
Suggested-by: Russell King - ARM Linux <linux@xxxxxxxxxxxxxxx>
Signed-off-by: Thomas Bogendoerfer <tsbogend@xxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/tty/serial/sccnxp.c | 15 ++++++++++-----
1 file changed, 10 insertions(+), 5 deletions(-)
--- a/drivers/tty/serial/sccnxp.c
+++ b/drivers/tty/serial/sccnxp.c
@@ -884,14 +884,19 @@ static int sccnxp_probe(struct platform_
clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(clk)) {
- if (PTR_ERR(clk) == -EPROBE_DEFER) {
- ret = -EPROBE_DEFER;
+ ret = PTR_ERR(clk);
+ if (ret == -EPROBE_DEFER)
goto err_out;
- }
+ uartclk = 0;
+ } else {
+ clk_prepare_enable(clk);
+ uartclk = clk_get_rate(clk);
+ }
+
+ if (!uartclk) {
dev_notice(&pdev->dev, "Using default clock frequency\n");
uartclk = s->chip->freq_std;
- } else
- uartclk = clk_get_rate(clk);
+ }
/* Check input frequency */
if ((uartclk < s->chip->freq_min) || (uartclk > s->chip->freq_max)) {
Patches currently in stable-queue which might be from tsbogend@xxxxxxxxxxxxxxxx are
queue-4.9/fix-serial-console-on-sni-rm400-machines.patch