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[U-Boot,v3,3/5] spi: cadence_qspi: Ensure check for max frequency in place

Message ID 1441861302-2471-1-git-send-email-clsee@altera.com
State Superseded
Delegated to: Marek Vasut
Headers show

Commit Message

Chin Liang See Sept. 10, 2015, 5:01 a.m. UTC 
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>
---
Changes for v3
- Remove the printout
---
 drivers/spi/cadence_qspi.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

--
1.7.7.4

Comments

Pavel Machek Sept. 11, 2015, 8:35 a.m. UTC | #1 
On Thu 2015-09-10 00:01:42, Chin Liang See wrote:
> Ensure the intended SCLK frequency not exceeding the maximum
> frequency. If that happen, SCLK will set to maximum frequency.

-> that happens, SCLK will be set to the maximum frequency.

Acked-by: Pavel Machek <pavel@denx.de>
diff mbox

Patch

diff --git a/drivers/spi/cadence_qspi.c b/drivers/spi/cadence_qspi.c
index 95236a3..89e4d3e 100644
--- a/drivers/spi/cadence_qspi.c
+++ b/drivers/spi/cadence_qspi.c
@@ -127,6 +127,9 @@  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);