From: Yash Shah <yash.shah@sifive.com>
To: palmer@sifive.com, linux-spi@vger.kernel.org,
linux-riscv@lists.infradead.org, broonie@kernel.org
Cc: robh+dt@kernel.org, mark.rutland@arm.com,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
sachin.ghadi@sifive.com, paul.walmsley@sifive.com,
Yash Shah <yash.shah@sifive.com>
Subject: [PATCH 1/2] spi: sifive: Add DT documentation for SiFive SPI controller
Date: Tue, 19 Feb 2019 17:10:06 +0530 [thread overview]
Message-ID: <1550576407-17778-2-git-send-email-yash.shah@sifive.com> (raw)
In-Reply-To: <1550576407-17778-1-git-send-email-yash.shah@sifive.com>
DT documentation for SPI controller added.
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
Signed-off-by: Emil Renner Berthing <kernel@esmil.dk>
Signed-off-by: Yash Shah <yash.shah@sifive.com>
---
.../devicetree/bindings/spi/spi-sifive.txt | 37 ++++++++++++++++++++++
1 file changed, 37 insertions(+)
create mode 100644 Documentation/devicetree/bindings/spi/spi-sifive.txt
diff --git a/Documentation/devicetree/bindings/spi/spi-sifive.txt b/Documentation/devicetree/bindings/spi/spi-sifive.txt
new file mode 100644
index 0000000..3f5c6e4
--- /dev/null
+++ b/Documentation/devicetree/bindings/spi/spi-sifive.txt
@@ -0,0 +1,37 @@
+SiFive SPI controller Device Tree Bindings
+------------------------------------------
+
+Required properties:
+- compatible : Should be "sifive,<chip>-spi" and "sifive,spi<version>".
+ Supported compatible strings are:
+ "sifive,fu540-c000-spi" for the SiFive SPI v0 as integrated
+ onto the SiFive FU540 chip, and "sifive,spi0" for the SiFive
+ SPI v0 IP block with no chip integration tweaks.
+ Please refer to sifive-blocks-ip-versioning.txt for details
+- reg : Physical base address and size of SPI registers map
+ A second (optional) range can indicate memory mapped flash
+- interrupts : Must contain one entry
+- interrupt-parent : Must be core interrupt controller
+- clocks : Must reference the frequency given to the controller
+- #address-cells : Must be '1', indicating which CS to use
+- #size-cells : Must be '0'
+
+Optional properties:
+- sifive,fifo-depth : Depth of hardware queues; defaults to 8
+- sifive,max-bits-per-word : Maximum bits per word; defaults to 8
+
+SPI RTL that corresponds to the IP block version numbers can be found here:
+https://github.com/sifive/sifive-blocks/tree/master/src/main/scala/devices/spi
+
+Example:
+ spi: spi@10040000 {
+ compatible = "sifive,fu540-c000-spi", "sifive,spi0";
+ reg = <0x0 0x10040000 0x0 0x1000 0x0 0x20000000 0x0 0x10000000>;
+ interrupt-parent = <&plic>;
+ interrupts = <51>;
+ clocks = <&tlclk>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ sifive,fifo-depth = <8>;
+ sifive,max-bits-per-word = <8>;
+ };
--
1.9.1
next prev parent reply other threads:[~2019-02-19 11:40 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-19 11:40 [PATCH 0/2] SPI support for HiFive Unleashed Yash Shah
2019-02-19 11:40 ` Yash Shah [this message]
2019-02-19 15:50 ` Applied "spi: sifive: Add DT documentation for SiFive SPI controller" to the spi tree Mark Brown
2019-02-19 11:40 ` [PATCH 2/2] spi: sifive: Add driver for the SiFive SPI controller Yash Shah
2019-02-19 15:50 ` Applied "spi: sifive: Add driver for the SiFive SPI controller" to the spi tree Mark Brown
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1550576407-17778-2-git-send-email-yash.shah@sifive.com \
--to=yash.shah@sifive.com \
--cc=broonie@kernel.org \
--cc=devicetree@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-riscv@lists.infradead.org \
--cc=linux-spi@vger.kernel.org \
--cc=mark.rutland@arm.com \
--cc=palmer@sifive.com \
--cc=paul.walmsley@sifive.com \
--cc=robh+dt@kernel.org \
--cc=sachin.ghadi@sifive.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).