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spi: cadence_qspi: Ensure check for max frequency in place 

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>
This commit is contained in:
Chin Liang See 2015-10-17 08:32:38 -05:00 committed by Marek Vasut
parent 040f4ba742
commit 4e609b6cb1
1 changed files with 3 additions and 0 deletions
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3
drivers/spi/cadence_qspi.c
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@ -122,6 +122,9 @@ static int cadence_spi_set_speed(struct udevice *bus, uint hz)
struct cadence_spi_priv *priv = dev_get_priv(bus); struct cadence_spi_priv *priv = dev_get_priv(bus);
int err; int err;
if (hz > plat->max_hz)
hz = plat->max_hz;
/* Disable QSPI */ /* Disable QSPI */
cadence_qspi_apb_controller_disable(priv->regbase); cadence_qspi_apb_controller_disable(priv->regbase);