From: Grzegorz Jaszczyk <jaz@semihalf.com>
Date: Fri, 30 Apr 2021 13:26:31 +0000 (+0200)
Subject: spi: kirkwood: prevent limiting speed to 0
X-Git-Url: http://git.dujemihanovic.xyz/?a=commitdiff_plain;h=9c84159ce1c7c6410640de66f0d5e52af09a115e;p=u-boot.git

spi: kirkwood: prevent limiting speed to 0

After commit 1fe929ed497bcc8975be8d37383ebafd22b99dd2
("spi: kirkwood: prevent configuring speed exceeding max controller freq")
the spi frequency could be set to 0 on platform where spi-max-frequency
is not defined (e.g. on armada-388-gp). Prevent limiting speed in
mentioned cases.

Signed-off-by: Grzegorz Jaszczyk <jaz@semihalf.com>
Tested-by: Kostya Porotchkin <kostap@marvell.com>
Reviewed-by: Marcin Wojtas <marcin@marvell.com>
Reviewed-by: Kostya Porotchkin <kostap@marvell.com>
Signed-off-by: Stefan Roese <sr@denx.de>
---

diff --git a/drivers/spi/kirkwood_spi.c b/drivers/spi/kirkwood_spi.c
index 063ed5f35a..bc5da0a1e6 100644
--- a/drivers/spi/kirkwood_spi.c
+++ b/drivers/spi/kirkwood_spi.c
@@ -115,7 +115,7 @@ static int mvebu_spi_set_speed(struct udevice *bus, uint hz)
 	u32 data, divider;
 	unsigned int spr, sppr;
 
-	if (hz > spi->max_hz) {
+	if (spi->max_hz && (hz > spi->max_hz)) {
 		debug("%s: limit speed to the max_hz of the bus %d\n",
 		      __func__, spi->max_hz);
 		hz = spi->max_hz;