linux-kernel - [PATCH V1 19/26] DT bindings: spi: add spi client device properties

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Date:   Tue, 26 Mar 2019 22:56:40 -0700
From:   Sowjanya Komatineni <skomatineni@...dia.com>
To:     <thierry.reding@...il.com>, <jonathanh@...dia.com>,
        <talho@...dia.com>, <skomatineni@...dia.com>, <broonie@...nel.org>,
        <robh+dt@...nel.org>, <mark.rutland@....com>,
        <kyarlagadda@...dia.com>
CC:     <ldewangan@...dia.com>, <linux-tegra@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linux-spi@...r.kernel.org>,
        <devicetree@...r.kernel.org>
Subject: [PATCH V1 19/26] DT bindings: spi: add spi client device properties

This patch adds below cs timing properties to allow SPI master configuring
setup, hold and time interval between two SPI transactions to meet specific
SPI client device requirements.
 CS setup time
 CS hold time
 CS inactive delay
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Signed-off-by: Sowjanya Komatineni <skomatineni@...dia.com>
---
 Documentation/devicetree/bindings/spi/nvidia,tegra114-spi.txt | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Documentation/devicetree/bindings/spi/nvidia,tegra114-spi.txt b/Documentation/devicetree/bindings/spi/nvidia,tegra114-spi.txt
index 9ba7c5a273b4..6167c5234b64 100644
--- a/Documentation/devicetree/bindings/spi/nvidia,tegra114-spi.txt
+++ b/Documentation/devicetree/bindings/spi/nvidia,tegra114-spi.txt
@@ -23,6 +23,13 @@ Required properties:
 Recommended properties:
 - spi-max-frequency: Definition as per
                      Documentation/devicetree/bindings/spi/spi-bus.txt
+
+spi-client device controller properties:
+- nvidia,cs-setup-clk-count: CS setup timing parameter.
+- nvidia,cs-hold-clk-count: CS hold timing parameter.
+- nvidia,cs-inactive-cycles: CS inactive delay in terms of clock between
+  transfers.
+
 Example:
 
 spi@...0d600 {
-- 
2.7.4