ipq806x: add NAND flash controller support

These patches add support for ipq806x NAND flash controller. Most of
these are cherry-picked & backported from LKML:
*https://lkml.org/lkml/2015/8/3/16

This patch just modifies the kernel code, but doesn't change the config.
It should be harmless.

Signed-off-by: Mathieu Olivari <mathieu@codeaurora.org>

SVN-Revision: 46568

1 files changed, 82 insertions, 0 deletions

diff --git a/target/linux/ipq806x/patches-3.18/163-dt-bindings-qcom_nandc-Add-DT-bindings.patch b/target/linux/ipq806x/patches-3.18/163-dt-bindings-qcom_nandc-Add-DT-bindings.patch
new file mode 100644
index 0000000000..6530eb1c86
--- /dev/null
+++ b/target/linux/ipq806x/patches-3.18/163-dt-bindings-qcom_nandc-Add-DT-bindings.patch
@@ -0,0 +1,82 @@
+Content-Type: text/plain; charset="utf-8"
+MIME-Version: 1.0
+Content-Transfer-Encoding: 7bit
+Subject: [v3,3/5] dt/bindings: qcom_nandc: Add DT bindings
+From: Archit Taneja <architt@codeaurora.org>
+X-Patchwork-Id: 6927141
+Message-Id: <1438578498-32254-4-git-send-email-architt@codeaurora.org>
+To: linux-mtd@lists.infradead.org, dehrenberg@google.com,
+	cernekee@gmail.com, computersforpeace@gmail.com
+Cc: linux-arm-msm@vger.kernel.org, agross@codeaurora.org,
+	sboyd@codeaurora.org, linux-kernel@vger.kernel.org,
+	Archit Taneja <architt@codeaurora.org>, devicetree@vger.kernel.org
+Date: Mon,  3 Aug 2015 10:38:16 +0530
+
+Add DT bindings document for the Qualcomm NAND controller driver.
+
+Cc: devicetree@vger.kernel.org
+
+v3:
+- Don't use '0x' when specifying nand controller address space
+- Add optional property for on-flash bbt usage
+
+Acked-by: Andy Gross <agross@codeaurora.org>
+Signed-off-by: Archit Taneja <architt@codeaurora.org>
+
+---
+.../devicetree/bindings/mtd/qcom_nandc.txt         | 49 ++++++++++++++++++++++
+ 1 file changed, 49 insertions(+)
+ create mode 100644 Documentation/devicetree/bindings/mtd/qcom_nandc.txt
+
+--- /dev/null
++++ b/Documentation/devicetree/bindings/mtd/qcom_nandc.txt
+@@ -0,0 +1,49 @@
++* Qualcomm NAND controller
++
++Required properties:
++- compatible:		should be "qcom,ebi2-nand" for IPQ806x
++- reg:			MMIO address range
++- clocks:		must contain core clock and always on clock
++- clock-names:		must contain "core" for the core clock and "aon" for the
++			always on clock
++- dmas:			DMA specifier, consisting of a phandle to the ADM DMA
++			controller node and the channel number to be used for
++			NAND. Refer to dma.txt and qcom_adm.txt for more details
++- dma-names:		must be "rxtx"
++- qcom,cmd-crci:	must contain the ADM command type CRCI block instance
++			number specified for the NAND controller on the given
++			platform
++- qcom,data-crci:	must contain the ADM data type CRCI block instance
++			number specified for the NAND controller on the given
++			platform
++
++Optional properties:
++- nand-bus-width:	bus width. Must be 8 or 16. If not present, 8 is chosen
++			as default
++
++- nand-ecc-strength:	number of bits to correct per ECC step. Must be 4 or 8
++			bits. If not present, 4 is chosen as default
++- nand-on-flash-bbt:	Create/use on-flash bad block table
++
++The device tree may optionally contain sub-nodes describing partitions of the
++address space. See partition.txt for more detail.
++
++Example:
++
++nand@1ac00000 {
++	compatible = "qcom,ebi2-nandc";
++	reg = <0x1ac00000 0x800>;
++
++	clocks = <&gcc EBI2_CLK>,
++		 <&gcc EBI2_AON_CLK>;
++	clock-names = "core", "aon";
++
++	dmas = <&adm_dma 3>;
++	dma-names = "rxtx";
++	qcom,cmd-crci = <15>;
++	qcom,data-crci = <3>;
++
++	partition@0 {
++	...
++	};
++};