[PATCH 1/8] spi: dt-bindings: Introduce spi-cs-setup-ns property

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



SPI NOR flashes have specific cs-setup time requirements without which
they can't work at frequencies close to their maximum supported frequency,
as they miss the first bits of the instruction command. Unrecognized
commands are ignored, thus the flash will be unresponsive. Introduce the
spi-cs-setup-ns property to allow spi devices to specify their cs setup
time.

Signed-off-by: Tudor Ambarus <tudor.ambarus@xxxxxxxxxxxxx>
---
 .../devicetree/bindings/spi/spi-peripheral-props.yaml        | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Documentation/devicetree/bindings/spi/spi-peripheral-props.yaml b/Documentation/devicetree/bindings/spi/spi-peripheral-props.yaml
index dca677f9e1b9..ead2cccf658f 100644
--- a/Documentation/devicetree/bindings/spi/spi-peripheral-props.yaml
+++ b/Documentation/devicetree/bindings/spi/spi-peripheral-props.yaml
@@ -44,6 +44,11 @@ properties:
     description:
       Maximum SPI clocking speed of the device in Hz.
 
+  spi-cs-setup-ns:
+    description:
+      Delay in nanosecods to be introduced by the controller after CS is
+      asserted.
+
   spi-rx-bus-width:
     description:
       Bus width to the SPI bus used for read transfers.
-- 
2.25.1




[Index of Archives]     [Device Tree Compilter]     [Device Tree Spec]     [Linux Driver Backports]     [Video for Linux]     [Linux USB Devel]     [Linux PCI Devel]     [Linux Audio Users]     [Linux Kernel]     [Linux SCSI]     [XFree86]     [Yosemite Backpacking]


  Powered by Linux