From: Lubomir Rintel <lkundrak@v3.sk>
To: Mark Brown <broonie@kernel.org>,
Geert Uytterhoeven <geert+renesas@glider.be>
Cc: James Cameron <quozl@laptop.org>,
Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Eric Miao <eric.y.miao@gmail.com>,
Haojian Zhuang <haojian.zhuang@gmail.com>,
Daniel Mack <daniel@zonque.org>,
Robert Jarzmik <robert.jarzmik@free.fr>,
linux-spi@vger.kernel.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
Lubomir Rintel <lkundrak@v3.sk>
Subject: [PATCH 09/11] dt-bindings: spi/spi-pxa2xx: Add ready GPIO signal
Date: Wed, 10 Oct 2018 19:09:34 +0200 [thread overview]
Message-ID: <20181010170936.316862-10-lkundrak@v3.sk> (raw)
In-Reply-To: <20181010170936.316862-1-lkundrak@v3.sk>
This this is used to let the SPI master know that our FIFO is filled and
we're ready to service a transfer. Only useful in slave mode.
A signal like this is used by an embedded controller on a OLPC XO 1.75
machine, that happens to be a SPI master.
Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
---
Documentation/devicetree/bindings/spi/spi-pxa2xx.txt | 2 ++
1 file changed, 2 insertions(+)
diff --git a/Documentation/devicetree/bindings/spi/spi-pxa2xx.txt b/Documentation/devicetree/bindings/spi/spi-pxa2xx.txt
index 89b2832283e3..681a82b40e6f 100644
--- a/Documentation/devicetree/bindings/spi/spi-pxa2xx.txt
+++ b/Documentation/devicetree/bindings/spi/spi-pxa2xx.txt
@@ -12,6 +12,8 @@ Optional properties:
- cs-gpios: list of GPIO chip selects. See the SPI bus bindings,
Documentation/devicetree/bindings/spi/spi-bus.txt
- spi-slave: Empty property indicating the SPI controller is used in slave mode.
+- ready-gpio: GPIO used to signal a SPI master that the FIFO is filled
+ and we're ready to service a transfer. Only useful in slave mode.
Child nodes represent devices on the SPI bus
See ../spi/spi-bus.txt
--
2.19.0
next prev parent reply other threads:[~2018-10-10 17:10 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-10 17:09 [PATCH 0/11] spi: pxa2xx: add DT and slave mode support Lubomir Rintel
2018-10-10 17:09 ` [PATCH v2 01/11] dt-bindings: spi/spi-pxa2xx: add PXA2xx SSP SPI Controller Lubomir Rintel
2018-10-11 14:27 ` Mark Brown
2018-10-11 17:59 ` Lubomir Rintel
2018-10-12 17:00 ` Mark Brown
2018-10-17 19:32 ` Rob Herring
2018-11-04 12:00 ` Pavel Machek
2018-10-10 17:09 ` [PATCH v2 02/11] PCI: Provide pci_match_id() with CONFIG_PCI=n Lubomir Rintel
2018-11-04 12:02 ` Pavel Machek
2018-10-10 17:09 ` [PATCH 03/11] spi: pxa2xx: Use an enum for type Lubomir Rintel
2018-11-04 12:03 ` Pavel Machek
2018-10-10 17:09 ` [PATCH 04/11] spi: pxa2xx: Add devicetree support Lubomir Rintel
2018-11-04 12:04 ` Pavel Machek
2018-10-10 17:09 ` [PATCH 05/11] DT: marvell,mmp2: Add SSP1 and SSP3 Lubomir Rintel
2018-10-29 5:35 ` James Cameron
2018-11-04 12:06 ` Pavel Machek
2018-10-10 17:09 ` [PATCH 06/11] dt-bindings: spi/spi-pxa2xx: Add spi-slave property Lubomir Rintel
2018-10-17 19:33 ` Rob Herring
2018-11-04 12:07 ` Pavel Machek
2018-10-10 17:09 ` [PATCH 07/11] spi: Deal with slaves that return from transfer_one() unfinished Lubomir Rintel
2018-10-11 7:23 ` Geert Uytterhoeven
2018-11-04 12:09 ` Pavel Machek
2018-10-10 17:09 ` [PATCH 08/11] spi: pxa2xx: Add slave mode support Lubomir Rintel
2018-11-04 12:12 ` Pavel Machek
2018-10-10 17:09 ` Lubomir Rintel [this message]
2018-10-11 7:26 ` [PATCH 09/11] dt-bindings: spi/spi-pxa2xx: Add ready GPIO signal Geert Uytterhoeven
2018-11-04 12:13 ` Pavel Machek
2018-10-10 17:09 ` [PATCH 10/11] spi: pxa2xx: Add ready signal Lubomir Rintel
2018-10-11 7:28 ` Geert Uytterhoeven
2018-10-11 16:13 ` Lubomir Rintel
2018-11-04 12:16 ` Pavel Machek
2018-10-10 17:09 ` [PATCH 11/11] spi: pxa2xx: Deal with the leftover garbage in TXFIFO Lubomir Rintel
2018-11-04 12:19 ` Pavel Machek
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