From: Marek Vasut <marek.vasut@gmail.com>
Date: Fri, 15 Sep 2017 19:11:27 +0000 (+0200)
Subject: serial: sh: Enable clock if available
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=791c174d58f6fbea2b055b5851ab33d8f73b2c93;p=project%2Fbcm63xx%2Fu-boot.git

serial: sh: Enable clock if available

If the clock framework provides the driver with valid clock,
enable them, otherwise the SCIF might not work if the clock
are not enabled prior to the driver probe.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
---

diff --git a/drivers/serial/serial_sh.c b/drivers/serial/serial_sh.c
index 087785f9a2..d9db702803 100644
--- a/drivers/serial/serial_sh.c
+++ b/drivers/serial/serial_sh.c
@@ -226,11 +226,14 @@ static int sh_serial_ofdata_to_platdata(struct udevice *dev)
 	plat->base = addr;
 
 	ret = clk_get_by_name(dev, "fck", &sh_serial_clk);
-	if (!ret)
-		plat->clk = clk_get_rate(&sh_serial_clk);
-	else
+	if (!ret) {
+		ret = clk_enable(&sh_serial_clk);
+		if (!ret)
+			plat->clk = clk_get_rate(&sh_serial_clk);
+	} else {
 		plat->clk = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev),
 					   "clock", 1);
+	}
 
 	plat->type = dev_get_driver_data(dev);
 	return 0;