[PATCH 2/2 v3] spi: spi-gpio: Augment device tree bindings
From: Linus Walleij <hidden>
Date: 2018-02-26 07:46:11
Subsystem:
open firmware and flattened device tree bindings, spi subsystem, the rest · Maintainers:
Rob Herring, Krzysztof Kozlowski, Conor Dooley, Mark Brown, Linus Torvalds
After we augmented the core to handle "gpio-sck"/"sck-gpios",
"gpio-mosi"/"mosi-gpios", "gpio-miso"/"miso-gpios" alike,
deprecate the old binding and put the strict modern and
recommended binding practice into place as the default for
GPIO-based SPI.
This reflects the similar change in I2C:
commit 7d29f509d2cf
("dt-bindings: i2c: i2c-gpio: Add support for named gpios")
Cc: devicetree@vger.kernel.org
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Andy Shevchenko <redacted>
Signed-off-by: Linus Walleij <redacted>
---
ChangeLog v2->v3:
- Collect Rob's ACK.
---
Documentation/devicetree/bindings/spi/spi-gpio.txt | 24 ++++++++++++++++------
1 file changed, 18 insertions(+), 6 deletions(-)
diff --git a/Documentation/devicetree/bindings/spi/spi-gpio.txt b/Documentation/devicetree/bindings/spi/spi-gpio.txt
index a95603bcf6ff..52db562f17a4 100644
--- a/Documentation/devicetree/bindings/spi/spi-gpio.txt
+++ b/Documentation/devicetree/bindings/spi/spi-gpio.txt@@ -1,18 +1,30 @@ SPI-GPIO devicetree bindings +This represents a group of 3-n GPIO lines used for bit-banged SPI on dedicated +GPIO lines. + Required properties: - compatible: should be set to "spi-gpio" - #address-cells: should be set to <0x1> - ranges - - gpio-sck: GPIO spec for the SCK line to use - - gpio-miso: GPIO spec for the MISO line to use - - gpio-mosi: GPIO spec for the MOSI line to use + - sck-gpios: GPIO spec for the SCK line to use + - miso-gpios: GPIO spec for the MISO line to use + - mosi-gpios: GPIO spec for the MOSI line to use - cs-gpios: GPIOs to use for chipselect lines. Not needed if num-chipselects = <0>. - num-chipselects: Number of chipselect lines. Should be <0> if a single device with no chip select is connected. +Deprecated bindings: + +These legacy GPIO line bindings can alternatively be used to define the +GPIO lines used, they should not be used in new device trees. + + - gpio-sck: GPIO spec for the SCK line to use + - gpio-miso: GPIO spec for the MISO line to use + - gpio-mosi: GPIO spec for the MOSI line to use + Example: spi {
@@ -20,9 +32,9 @@ Example: #address-cells = <0x1>; ranges; - gpio-sck = <&gpio 95 0>; - gpio-miso = <&gpio 98 0>; - gpio-mosi = <&gpio 97 0>; + sck-gpios = <&gpio 95 0>; + miso-gpios = <&gpio 98 0>; + mosi-gpios = <&gpio 97 0>; cs-gpios = <&gpio 125 0>; num-chipselects = <1>;
--
2.14.3