Hi,

On Thu, Jun 30, 2016 at 12:12 AM, Geert Uytterhoeven
[off-list ref] wrote:

CC devicetree

On Thu, Jun 30, 2016 at 5:54 AM,  [off-list ref] wrote:

quoted

From: Andrey Pronin <redacted>

Some devices may need CS to be deasserted for some time
between transactions. Added a new capability to guarantee
a delay between SPI transactions for the device.

Signed-off-by: Andrey Pronin <redacted>
---
 Documentation/devicetree/bindings/spi/spi-bus.txt | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Documentation/devicetree/bindings/spi/spi-bus.txt b/Documentation/devicetree/bindings/spi/spi-bus.txt
index 1b7ffd4..87c117a 100644
--- a/Documentation/devicetree/bindings/spi/spi-bus.txt
+++ b/Documentation/devicetree/bindings/spi/spi-bus.txt

@@ -70,6 +70,8 @@ contain the following properties.
                sleep if there was no SPI activity (msec).
 - cs-wake-duration - (optional) Time it takes the device to wake up after
                toggling CS if it went to sleep (msec).
+- xfer-delay      - (optional) Delay to insert between SPI transactions
+               to guarantee that CS is deasserted at least for some time.

msec?  usec?  nsec?

Also, as with the other patch, this should be _before_ the code
change, so this should really be patch 3 not patch 4.
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