From: Piotr Sroka <piotrs@cadence.com>
To: <linux-kernel@vger.kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>,
devicetree@vger.kernel.org,
Boris Brezillon <bbrezillon@kernel.org>,
Richard Weinberger <richard@nod.at>,
Marek Vasut <marek.vasut@gmail.com>,
Rob Herring <robh+dt@kernel.org>,
linux-mtd@lists.infradead.org,
BrianNorris <computersforpeace@gmail.com>,
David Woodhouse <dwmw2@infradead.org>,
Piotr Sroka <piotrs@cadence.com>
Subject: [v3 2/2] dt-bindings: nand: Add Cadence NAND controller driver
Date: Fri, 14 Jun 2019 16:13:01 +0100 [thread overview]
Message-ID: <20190614151301.5371-1-piotrs@cadence.com> (raw)
In-Reply-To: <20190614150956.31244-1-piotrs@cadence.com>
Signed-off-by: Piotr Sroka <piotrs@cadence.com>
---
Changes for v3:
- add unit suffix for board_delay
- move child description to proper place
- remove prefix cadence_ for reg and sdma fields
Changes for v2:
- remove chip dependends parameters from dts bindings
- add names for register ranges in dts bindings
- add generic bindings to describe NAND chip representation
---
.../bindings/mtd/cadence-nand-controller.txt | 51 ++++++++++++++++++++++
1 file changed, 51 insertions(+)
create mode 100644 Documentation/devicetree/bindings/mtd/cadence-nand-controller.txt
diff --git a/Documentation/devicetree/bindings/mtd/cadence-nand-controller.txt b/Documentation/devicetree/bindings/mtd/cadence-nand-controller.txt
new file mode 100644
index 000000000000..e485b87075bd
--- /dev/null
+++ b/Documentation/devicetree/bindings/mtd/cadence-nand-controller.txt
@@ -0,0 +1,51 @@
+* Cadence NAND controller
+
+Required properties:
+ - compatible : "cdns,hpnfc"
+ - reg : Contains two entries, each of which is a tuple consisting of a
+ physical address and length. The first entry is the address and
+ length of the controller register set. The second entry is the
+ address and length of the Slave DMA data port.
+ - reg-names: should contain "reg" and "sdma"
+ - interrupts : The interrupt number.
+ - clocks: phandle of the controller core clock (nf_clk).
+
+Optional properties:
+ - dmas: shall reference DMA channel associated to the NAND controller
+ - cdns,board-delay_ps : Estimated Board delay. The value includes the total
+ round trip delay for the signals and is used for deciding on values
+ associated with data read capture. The example formula for SDR mode is
+ the following:
+ board_delay = RE#PAD_delay + PCB trace to device + PCB trace from device
+ + DQ PAD delay
+
+Children nodes represent the available NAND chips.
+
+Required properties of NAND chips:
+ - reg: shall contain the native Chip Select ids from 0 to max supported by
+ the cadence nand flash controller
+
+
+See Documentation/devicetree/bindings/mtd/nand.txt for more details on
+generic bindings.
+
+Example:
+
+nand_controller: nand-controller @60000000 {
+
+ compatible = "cdns,hpnfc";
+ reg = <0x60000000 0x10000>, <0x80000000 0x10000>;
+ reg-names = "reg", "sdma";
+ clocks = <&nf_clk>;
+ cdns,board-delay_ps = <4830>;
+ interrupts = <2 0>;
+ nand@0 {
+ reg = <0>;
+ label = "nand-1";
+ };
+ nand@1 {
+ reg = <1>;
+ label = "nand-2";
+ };
+
+};
--
2.15.0
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next prev parent reply other threads:[~2019-06-14 15:13 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-14 15:06 [v3 0/2] mtd: nand: Add Cadence NAND controller driver Piotr Sroka
2019-06-14 15:09 ` [v3 1/2] " Piotr Sroka
2019-06-14 15:13 ` Piotr Sroka [this message]
2019-07-09 14:48 ` [v3 2/2] dt-bindings: " Rob Herring
2019-07-17 10:58 ` Piotr Sroka
2019-06-16 13:42 ` [v3 1/2] mtd: " Dmitry Osipenko
2019-06-25 13:02 ` Piotr Sroka
2019-06-25 14:45 ` Dmitry Osipenko
2019-06-25 15:23 ` Geert Uytterhoeven
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