[U-Boot] [PATCH v5 4/5] spi: cadence_qspi: Ensure check for max frequency in place

* [U-Boot] [PATCH v5 4/5] spi: cadence_qspi: Ensure check for max frequency in place
@ 2015-10-17 13:32 Chin Liang See
  2015-10-17 14:14 ` Marek Vasut
  0 siblings, 1 reply; 5+ messages in thread
From: Chin Liang See @ 2015-10-17 13:32 UTC (permalink / raw)
  To: u-boot

Ensure the intended SCLK frequency not exceeding the maximum
frequency. If that happen, SCLK will set to maximum frequency.

Signed-off-by: Chin Liang See <clsee@altera.com>
Cc: Dinh Nguyen <dinguyen@opensource.altera.com>
Cc: Dinh Nguyen <dinh.linux@gmail.com>
Cc: Marek Vasut <marex@denx.de>
Cc: Stefan Roese <sr@denx.de>
Cc: Vikas Manocha <vikas.manocha@st.com>
Cc: Jagannadh Teki <jteki@openedev.com>
Cc: Pavel Machek <pavel@denx.de>
Acked-by: Pavel Machek <pavel@denx.de>
---
Changes for v5
- shuffling the patches
Changes for v4
- no changes
Changes for v3
- Remove the printout
Changes for v2
- no changes
---
 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 5756178..4f7fd52 100644
--- a/drivers/spi/cadence_qspi.c
+++ b/drivers/spi/cadence_qspi.c
@@ -122,6 +122,9 @@ static int cadence_spi_set_speed(struct udevice *bus, uint hz)
 	struct cadence_spi_priv *priv = dev_get_priv(bus);
 	int err;
 
+	if (hz > plat->max_hz)
+		hz = plat->max_hz;
+
 	/* Disable QSPI */
 	cadence_qspi_apb_controller_disable(priv->regbase);
 
-- 
2.2.0

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