linux-kernel - [PATCH 08/10] mtd: flash-sam: Bindings for Juniper's SAM FPGA flash

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Message-Id: <1475853518-22264-9-git-send-email-pantelis.antoniou@konsulko.com>
Date:   Fri,  7 Oct 2016 18:18:36 +0300
From:   Pantelis Antoniou <pantelis.antoniou@...sulko.com>
To:     Lee Jones <lee.jones@...aro.org>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Alexandre Courbot <gnurou@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Frank Rowand <frowand.list@...il.com>,
        Wolfram Sang <wsa@...-dreams.de>,
        David Woodhouse <dwmw2@...radead.org>,
        Brian Norris <computersforpeace@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Wim Van Sebroeck <wim@...ana.be>,
        Peter Rosin <peda@...ntia.se>,
        Debjit Ghosh <dghosh@...iper.net>,
        Georgi Vlaev <gvlaev@...iper.net>,
        Guenter Roeck <linux@...ck-us.net>,
        Maryam Seraj <mseraj@...iper.net>,
        Pantelis Antoniou <pantelis.antoniou@...sulko.com>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-gpio@...r.kernel.org, linux-i2c@...r.kernel.org,
        linux-mtd@...ts.infradead.org, linux-watchdog@...r.kernel.org,
        netdev@...r.kernel.org
Subject: [PATCH 08/10] mtd: flash-sam: Bindings for Juniper's SAM FPGA flash

From: Georgi Vlaev <gvlaev@...iper.net>

Add binding document for Junipers Flash IP block present
in the SAM FPGA on PTX series of routers.

Signed-off-by: Georgi Vlaev <gvlaev@...iper.net>
[Ported from Juniper kernel]
Signed-off-by: Pantelis Antoniou <pantelis.antoniou@...sulko.com>
---
 .../devicetree/bindings/mtd/flash-sam.txt          | 31 ++++++++++++++++++++++
 1 file changed, 31 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mtd/flash-sam.txt

diff --git a/Documentation/devicetree/bindings/mtd/flash-sam.txt b/Documentation/devicetree/bindings/mtd/flash-sam.txt
new file mode 100644
index 0000000..bdf1d78
--- /dev/null
+++ b/Documentation/devicetree/bindings/mtd/flash-sam.txt
@@ -0,0 +1,31 @@
+Flash device on a Juniper SAM FPGA
+
+These flash chips are found in the PTX series of Juniper routers.
+
+They are regular CFI compatible (Intel or AMD extended) flash chips with
+some special write protect/VPP bits that can be controlled by the machine's
+system controller.
+
+Required properties:
+- compatible : must be "jnx,flash-sam"
+
+Optional properties:
+- reg : memory address for the flash chip, note that this is not
+required since usually the device is a subdevice of the SAM MFD
+driver which fills in the register fields.
+
+For the rest of the properties, see mtd-physmap.txt.
+
+The device tree may optionally contain sub-nodes describing partitions of the
+address space. See partition.txt for more detail.
+
+Example:
+
+flash_sam {
+	compatible = "jnx,flash-sam";
+	partition@0 {
+		reg = <0x0 0x400000>;
+		label = "pic0-golden";
+		read-only;
+	};
+};
-- 
1.9.1