[PATCH v1] spi: cadence_qspi: Probe fail if QSPI clock is not set

[Chee Hong Ang]

If the QSPI clock is not set (read as 0), QSPI driver probe shall fail
and prevent further QSPI access.

Signed-off-by: Chee Hong Ang <chee.hong.ang at intel.com>
---
 drivers/spi/cadence_qspi.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/spi/cadence_qspi.c b/drivers/spi/cadence_qspi.c
index 1e85749209..3bb5c7031d 100644
--- a/drivers/spi/cadence_qspi.c
+++ b/drivers/spi/cadence_qspi.c
@@ -170,6 +170,9 @@ static int cadence_spi_probe(struct udevice *bus)
 	struct clk clk;
 	int ret;
 
+	if (!CONFIG_CQSPI_REF_CLK)
+		return -ENODEV;
+
 	priv->regbase = plat->regbase;
 	priv->ahbbase = plat->ahbbase;
 
-- 
2.19.0