From 0f8976e33533826d0df360c0ce01a5efd428b663 Mon Sep 17 00:00:00 2001
From: Chin Liang See clsee@altera.com Date: Thu, 15 Oct 2015 13:57:27 +0800 Subject: [PATCH v4 3/5] 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 --- 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);