[PATCH 2/3] mtd: rawnand: denali: Allow operation without clock driver

[Marek Vasut <marex@denx.de>]

The SoCFPGA Gen5 does not have a clock driver yet, let the NAND driver
work without a clock driver by falling back to the default frequencies.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
---
 drivers/mtd/nand/raw/denali_dt.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/mtd/nand/raw/denali_dt.c b/drivers/mtd/nand/raw/denali_dt.c
index 0ce81324b9..2c9e249ab6 100644
--- a/drivers/mtd/nand/raw/denali_dt.c
+++ b/drivers/mtd/nand/raw/denali_dt.c
@@ -62,7 +62,6 @@ static int denali_dt_probe(struct udevice *dev)
 {
 	struct denali_nand_info *denali = dev_get_priv(dev);
 	const struct denali_dt_data *data;
-	struct clk clk, clk_x, clk_ecc;
 	struct resource res;
 	int ret;
 
@@ -87,11 +86,14 @@ static int denali_dt_probe(struct udevice *dev)
 
 	denali->host = devm_ioremap(dev, res.start, resource_size(&res));
 
+#if CONFIG_IS_ENABLED(CLK)
+	struct clk clk, clk_x, clk_ecc;
+
 	ret = clk_get_by_name(dev, "nand", &clk);
 	if (ret)
 		ret = clk_get_by_index(dev, 0, &clk);
 	if (ret)
-		return ret;
+		clk.dev = NULL;
 
 	ret = clk_get_by_name(dev, "nand_x", &clk_x);
 	if (ret)
@@ -117,10 +119,12 @@ static int denali_dt_probe(struct udevice *dev)
 			return ret;
 	}
 
-	if (clk_x.dev) {
+	if (clk.dev && clk_x.dev) {
 		denali->clk_rate = clk_get_rate(&clk);
 		denali->clk_x_rate = clk_get_rate(&clk_x);
-	} else {
+	} else
+#endif
+	{
 		/*
 		 * Hardcode the clock rates for the backward compatibility.
 		 * This works for both SOCFPGA and UniPhier.
-- 
2.24.1