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authorLinus Torvalds <torvalds@linux-foundation.org>2018-04-03 12:06:21 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2018-04-03 12:06:21 -0700
commit75dcc7ef952af106c1b7051daa591b566632fd30 (patch)
treef297f538da5509758d28e33fcd8b17ff67c7387e /Documentation/devicetree
parentb51c4354dffd32b3472c5a3da7ce864c7be82601 (diff)
parent0930437e8f9d1f513ca7f130a650b608358f8805 (diff)
Merge tag 'spi-v4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi
Pull SPI updates from Mark Brown: "A quiet release for SPI, some fixes and small updates for individual drivers with one bigger change from Linus Walleij which coverts the bitbanging SPI driver to use the GPIO descriptor API from Linus Walleij. Since GPIO descriptors were used by platform data this means there's a few changes in arch/ making relevant updates for a few platforms and one misc driver that are affected" * tag 'spi-v4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi: (24 commits) MAINTAINERS: update Andi's e-mail spi: spi-atmel: Use correct enum for DMA transfer direction spi: sh-msiof: Document R-Car M3-N support spi: sh-msiof: Use correct enum for DMA transfer direction spi: sprd: Add the support of restarting the system spi: sprd: Simplify the transfer function spi: Fix unregistration of controller with fixed SPI bus number spi: rspi: use correct enum for DMA transfer direction spi: jcore: disable ref_clk after getting its rate spi: bcm-qspi: fIX some error handling paths spi: pxa2xx: Disable runtime PM if controller registration fails spi: tegra20-slink: use true and false for boolean values spi: Fix scatterlist elements size in spi_map_buf spi: atmel: init FIFOs before spi enable spi: orion: Prepare space for per-child options spi: orion: Make the error message greppable spi: orion: Rework GPIO CS handling spi: bcm2835aux: Avoid 64-bit arithmetic in xfer len calc spi: spi-gpio: Augment device tree bindings spi: spi-gpio: Rewrite to use GPIO descriptors ...
Diffstat (limited to 'Documentation/devicetree')
-rw-r--r--Documentation/devicetree/bindings/spi/sh-msiof.txt1
-rw-r--r--Documentation/devicetree/bindings/spi/spi-gpio.txt24
2 files changed, 19 insertions, 6 deletions
diff --git a/Documentation/devicetree/bindings/spi/sh-msiof.txt b/Documentation/devicetree/bindings/spi/sh-msiof.txt
index 80710f0f0448..39806329c193 100644
--- a/Documentation/devicetree/bindings/spi/sh-msiof.txt
+++ b/Documentation/devicetree/bindings/spi/sh-msiof.txt
@@ -10,6 +10,7 @@ Required properties:
"renesas,msiof-r8a7794" (R-Car E2)
"renesas,msiof-r8a7795" (R-Car H3)
"renesas,msiof-r8a7796" (R-Car M3-W)
+ "renesas,msiof-r8a77965" (R-Car M3-N)
"renesas,msiof-sh73a0" (SH-Mobile AG5)
"renesas,sh-mobile-msiof" (generic SH-Mobile compatibile device)
"renesas,rcar-gen2-msiof" (generic R-Car Gen2 and RZ/G1 compatible device)
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>;