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
2015-08-07 08:36:31 +00:00
parent c7bf2accc9
commit d523866eb3
16 changed files with 4739 additions and 26 deletions
--- a/target/linux/ipq806x/patches-3.18/160-clk-qcom-Add-EBI2-clocks-for-IPQ806x.patch
+++ b/target/linux/ipq806x/patches-3.18/160-clk-qcom-Add-EBI2-clocks-for-IPQ806x.patch
@@ -0,0 +1,74 @@
+From 4c385b25fab119144bffb255ad77712fe586ac10 Mon Sep 17 00:00:00 2001
+From: Archit Taneja <architt@codeaurora.org>
+Date: Thu, 2 Apr 2015 11:20:41 +0530
+Subject: [PATCH] clk: qcom: Add EBI2 clocks for IPQ806x
+
+The NAND controller within EBI2 requires EBI2_CLK and
+EBI2_ALWAYS_ON_CLK clocks.  Create structs for these clocks so
+that they can be used by the NAND controller driver. Add an entry
+for EBI2_AON_CLK in the gcc-ipq806x DT binding document.
+
+Signed-off-by: Archit Taneja <architt@codeaurora.org>
+Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
+---
+ drivers/clk/qcom/gcc-ipq806x.c               | 32 ++++++++++++++++++++++++++++
+ include/dt-bindings/clock/qcom,gcc-ipq806x.h |  1 +
+ 2 files changed, 33 insertions(+)
+
+--- a/drivers/clk/qcom/gcc-ipq806x.c
+++ b/drivers/clk/qcom/gcc-ipq806x.c
+@@ -2239,6 +2239,36 @@ static struct clk_branch usb_fs1_h_clk =
+ 	},
+ };
+ 
+static struct clk_branch ebi2_clk = {
+	.hwcg_reg = 0x3b00,
+	.hwcg_bit = 6,
+	.halt_reg = 0x2fcc,
+	.halt_bit = 1,
+	.clkr = {
+		.enable_reg = 0x3b00,
+		.enable_mask = BIT(4),
+		.hw.init = &(struct clk_init_data){
+			.name = "ebi2_clk",
+			.ops = &clk_branch_ops,
+			.flags = CLK_IS_ROOT,
+		},
+	},
+};
+
+static struct clk_branch ebi2_aon_clk = {
+	.halt_reg = 0x2fcc,
+	.halt_bit = 0,
+	.clkr = {
+		.enable_reg = 0x3b00,
+		.enable_mask = BIT(8),
+		.hw.init = &(struct clk_init_data){
+			.name = "ebi2_always_on_clk",
+			.ops = &clk_branch_ops,
+			.flags = CLK_IS_ROOT,
+		},
+	},
+};
+
+ static struct clk_regmap *gcc_ipq806x_clks[] = {
+ 	[PLL0] = &pll0.clkr,
+ 	[PLL0_VOTE] = &pll0_vote,
+@@ -2341,6 +2371,8 @@ static struct clk_regmap *gcc_ipq806x_cl
+ 	[USB_FS1_XCVR_SRC] = &usb_fs1_xcvr_clk_src.clkr,
+ 	[USB_FS1_XCVR_CLK] = &usb_fs1_xcvr_clk.clkr,
+ 	[USB_FS1_SYSTEM_CLK] = &usb_fs1_sys_clk.clkr,
+	[EBI2_CLK] = &ebi2_clk.clkr,
+	[EBI2_AON_CLK] = &ebi2_aon_clk.clkr,
+ 	[PLL9] = &hfpll0.clkr,
+ 	[PLL10] = &hfpll1.clkr,
+ 	[PLL12] = &hfpll_l2.clkr,
+--- a/include/dt-bindings/clock/qcom,gcc-ipq806x.h
+++ b/include/dt-bindings/clock/qcom,gcc-ipq806x.h
+@@ -289,5 +289,6 @@
+ #define UBI32_CORE2_CLK_SRC			278
+ #define UBI32_CORE1_CLK				279
+ #define UBI32_CORE2_CLK				280
+#define EBI2_AON_CLK				281
+ 
+ #endif
--- a/target/linux/ipq806x/patches-3.18/161-mtd-nand-Create-a-BBT-flag-to-access-bad-block-markers-in-raw-mode.patch
+++ b/target/linux/ipq806x/patches-3.18/161-mtd-nand-Create-a-BBT-flag-to-access-bad-block-markers-in-raw-mode.patch
@@ -0,0 +1,84 @@
+Content-Type: text/plain; charset="utf-8"
+MIME-Version: 1.0
+Content-Transfer-Encoding: 7bit
+Subject: [v3,
+	1/5] mtd: nand: Create a BBT flag to access bad block markers in raw
+	mode
+From: Archit Taneja <architt@codeaurora.org>
+X-Patchwork-Id: 6927081
+Message-Id: <1438578498-32254-2-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>
+Date: Mon,  3 Aug 2015 10:38:14 +0530
+
+Some controllers can access the factory bad block marker from OOB only
+when they read it in raw mode. When ECC is enabled, these controllers
+discard reading/writing bad block markers, preventing access to them
+altogether.
+
+The bbt driver assumes MTD_OPS_PLACE_OOB when scanning for bad blocks.
+This results in the nand driver's ecc->read_oob() op to be called, which
+works with ECC enabled.
+
+Create a new BBT option flag that tells nand_bbt to force the mode to
+MTD_OPS_RAW. This would result in the correct op being called for the
+underlying nand controller driver.
+
+Reviewed-by: Andy Gross <agross@codeaurora.org>
+Signed-off-by: Archit Taneja <architt@codeaurora.org>
+
+---
+drivers/mtd/nand/nand_base.c | 6 +++++-
+ drivers/mtd/nand/nand_bbt.c  | 6 +++++-
+ include/linux/mtd/bbm.h      | 7 +++++++
+ 3 files changed, 17 insertions(+), 2 deletions(-)
+
+--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
+@@ -396,7 +396,11 @@ static int nand_default_block_markbad(st
+ 	} else {
+ 		ops.len = ops.ooblen = 1;
+ 	}
+-	ops.mode = MTD_OPS_PLACE_OOB;
+
+	if (unlikely(chip->bbt_options & NAND_BBT_ACCESS_BBM_RAW))
+		ops.mode = MTD_OPS_RAW;
+	else
+		ops.mode = MTD_OPS_PLACE_OOB;
+ 
+ 	/* Write to first/last page(s) if necessary */
+ 	if (chip->bbt_options & NAND_BBT_SCANLASTPAGE)
+--- a/drivers/mtd/nand/nand_bbt.c
+++ b/drivers/mtd/nand/nand_bbt.c
+@@ -423,7 +423,11 @@ static int scan_block_fast(struct mtd_in
+ 	ops.oobbuf = buf;
+ 	ops.ooboffs = 0;
+ 	ops.datbuf = NULL;
+-	ops.mode = MTD_OPS_PLACE_OOB;
+
+	if (unlikely(bd->options & NAND_BBT_ACCESS_BBM_RAW))
+		ops.mode = MTD_OPS_RAW;
+	else
+		ops.mode = MTD_OPS_PLACE_OOB;
+ 
+ 	for (j = 0; j < numpages; j++) {
+ 		/*
+--- a/include/linux/mtd/bbm.h
+++ b/include/linux/mtd/bbm.h
+@@ -116,6 +116,13 @@ struct nand_bbt_descr {
+ #define NAND_BBT_NO_OOB_BBM	0x00080000
+ 
+ /*
+ * Force MTD_OPS_RAW mode when trying to access bad block markes from OOB. To
+ * be used by controllers which can access BBM only when ECC is disabled, i.e,
+ * when in RAW access mode
+ */
+#define NAND_BBT_ACCESS_BBM_RAW	0x00100000
+
+/*
+  * Flag set by nand_create_default_bbt_descr(), marking that the nand_bbt_descr
+  * was allocated dynamicaly and must be freed in nand_release(). Has no meaning
+  * in nand_chip.bbt_options.
--- a/target/linux/ipq806x/patches-3.18/162-mtd-nand-Qualcomm-NAND-controller-driver.patch
+++ b/target/linux/ipq806x/patches-3.18/162-mtd-nand-Qualcomm-NAND-controller-driver.patch
--- 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
@@ -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 {
+	...
+	};
+};
--- a/target/linux/ipq806x/patches-3.18/164-arm-qcom-dts-Add-NAND-controller-node-for-ipq806x.patch
+++ b/target/linux/ipq806x/patches-3.18/164-arm-qcom-dts-Add-NAND-controller-node-for-ipq806x.patch
@@ -0,0 +1,50 @@
+Content-Type: text/plain; charset="utf-8"
+MIME-Version: 1.0
+Content-Transfer-Encoding: 7bit
+Subject: [v3,4/5] arm: qcom: dts: Add NAND controller node for ipq806x
+From: Archit Taneja <architt@codeaurora.org>
+X-Patchwork-Id: 6927121
+Message-Id: <1438578498-32254-5-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 10:38:17 +0530
+
+The nand controller in IPQ806x is of the 'EBI2 type'. Use the corresponding
+compatible string.
+
+Cc: devicetree@vger.kernel.org
+
+Reviewed-by: Andy Gross <agross@codeaurora.org>
+Signed-off-by: Archit Taneja <architt@codeaurora.org>
+
+---
+arch/arm/boot/dts/qcom-ipq8064.dtsi | 15 +++++++++++++++
+ 1 file changed, 15 insertions(+)
+
+--- a/arch/arm/boot/dts/qcom-ipq8064.dtsi
+++ b/arch/arm/boot/dts/qcom-ipq8064.dtsi
+@@ -677,5 +677,21 @@
+ 			status = "disabled";
+ 		};
+ 
+		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>;
+
+			status = "disabled";
+		};
+
+ 	};
+ };
--- a/target/linux/ipq806x/patches-3.18/165-arm-qcom-dts-Enable-NAND-node-on-IPQ8064-AP148-platform.patch
+++ b/target/linux/ipq806x/patches-3.18/165-arm-qcom-dts-Enable-NAND-node-on-IPQ8064-AP148-platform.patch
@@ -0,0 +1,79 @@
+Content-Type: text/plain; charset="utf-8"
+MIME-Version: 1.0
+Content-Transfer-Encoding: 7bit
+Subject: [v3,5/5] arm: qcom: dts: Enable NAND node on IPQ8064 AP148 platform
+From: Archit Taneja <architt@codeaurora.org>
+X-Patchwork-Id: 6927091
+Message-Id: <1438578498-32254-6-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 10:38:18 +0530
+
+Enable the NAND controller node on the AP148 platform. Provide pinmux
+information.
+
+Cc: devicetree@vger.kernel.org
+
+Signed-off-by: Archit Taneja <architt@codeaurora.org>
+
+---
+arch/arm/boot/dts/qcom-ipq8064-ap148.dts | 36 ++++++++++++++++++++++++++++++++
+ 1 file changed, 36 insertions(+)
+
+--- a/arch/arm/boot/dts/qcom-ipq8064-ap148.dts
+++ b/arch/arm/boot/dts/qcom-ipq8064-ap148.dts
+@@ -61,6 +61,31 @@
+ 					bias-none;
+ 				};
+ 			};
+
+			nand_pins: nand_pins {
+				mux {
+					pins = "gpio34", "gpio35", "gpio36",
+					       "gpio37", "gpio38", "gpio39",
+					       "gpio40", "gpio41", "gpio42",
+					       "gpio43", "gpio44", "gpio45",
+					       "gpio46", "gpio47";
+					function = "nand";
+					drive-strength = <10>;
+					bias-disable;
+				};
+
+				pullups {
+					pins = "gpio39";
+					bias-pull-up;
+				};
+
+				hold {
+					pins = "gpio40", "gpio41", "gpio42",
+					       "gpio43", "gpio44", "gpio45",
+					       "gpio46", "gpio47";
+					bias-bus-hold;
+				};
+			};
+ 		};
+ 
+ 		gsbi@16300000 {
+@@ -174,5 +199,19 @@
+ 			pinctrl-0 = <&pcie1_pins>;
+ 			pinctrl-names = "default";
+ 		};
+
+		nand@1ac00000 {
+			status = "ok";
+
+			pinctrl-0 = <&nand_pins>;
+			pinctrl-names = "default";
+
+			nand-ecc-strength = <4>;
+			nand-bus-width = <8>;
+		};
+ 	};
+ };
+
+&adm_dma {
+	status = "ok";
+};
--- a/target/linux/ipq806x/patches-3.18/700-clk-qcom-Add-support-for-NSS-GMAC-clocks-and-resets.patch
+++ b/target/linux/ipq806x/patches-3.18/700-clk-qcom-Add-support-for-NSS-GMAC-clocks-and-resets.patch
@@ -86,7 +86,7 @@ Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
 static struct freq_tbl clk_tbl_gsbi_uart[] = {
 	{  1843200, P_PLL8, 2,  6, 625 },
 	{  3686400, P_PLL8, 2, 12, 625 },
-@@ -2239,6 +2290,472 @@ static struct clk_branch usb_fs1_h_clk =
+@@ -2269,6 +2320,472 @@ static struct clk_branch ebi2_aon_clk =
 	},
 };
 
@@ -559,7 +559,7 @@ Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
 static struct clk_regmap *gcc_ipq806x_clks[] = {
 	[PLL0] = &pll0.clkr,
 	[PLL0_VOTE] = &pll0_vote,
-@@ -2247,6 +2764,7 @@ static struct clk_regmap *gcc_ipq806x_cl
+@@ -2277,6 +2794,7 @@ static struct clk_regmap *gcc_ipq806x_cl
 	[PLL8_VOTE] = &pll8_vote,
 	[PLL14] = &pll14.clkr,
 	[PLL14_VOTE] = &pll14_vote,
@@ -567,7 +567,7 @@ Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
 	[GSBI1_UART_SRC] = &gsbi1_uart_src.clkr,
 	[GSBI1_UART_CLK] = &gsbi1_uart_clk.clkr,
 	[GSBI2_UART_SRC] = &gsbi2_uart_src.clkr,
-@@ -2344,6 +2862,18 @@ static struct clk_regmap *gcc_ipq806x_cl
+@@ -2376,6 +2894,18 @@ static struct clk_regmap *gcc_ipq806x_cl
 	[PLL9] = &hfpll0.clkr,
 	[PLL10] = &hfpll1.clkr,
 	[PLL12] = &hfpll_l2.clkr,
@@ -586,7 +586,7 @@ Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
 };
 
 static const struct qcom_reset_map gcc_ipq806x_resets[] = {
-@@ -2462,6 +2992,48 @@ static const struct qcom_reset_map gcc_i
+@@ -2494,6 +3024,48 @@ static const struct qcom_reset_map gcc_i
 	[USB30_1_PHY_RESET] = { 0x3b58, 0 },
 	[NSSFB0_RESET] = { 0x3b60, 6 },
 	[NSSFB1_RESET] = { 0x3b60, 7 },
@@ -635,7 +635,7 @@ Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
 };
 
 static const struct regmap_config gcc_ipq806x_regmap_config = {
-@@ -2490,6 +3062,8 @@ static int gcc_ipq806x_probe(struct plat
+@@ -2522,6 +3094,8 @@ static int gcc_ipq806x_probe(struct plat
 {
 	struct clk *clk;
 	struct device *dev = &pdev->dev;
@@ -644,7 +644,7 @@ Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
 
 	/* Temporary until RPM clocks supported */
 	clk = clk_register_fixed_rate(dev, "cxo", NULL, CLK_IS_ROOT, 25000000);
-@@ -2500,7 +3074,25 @@ static int gcc_ipq806x_probe(struct plat
+@@ -2532,7 +3106,25 @@ static int gcc_ipq806x_probe(struct plat
 	if (IS_ERR(clk))
 		return PTR_ERR(clk);
 
@@ -673,12 +673,12 @@ Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
 static int gcc_ipq806x_remove(struct platform_device *pdev)
 --- a/include/dt-bindings/clock/qcom,gcc-ipq806x.h
 +++ b/include/dt-bindings/clock/qcom,gcc-ipq806x.h
-@@ -289,5 +289,7 @@
- #define UBI32_CORE2_CLK_SRC			278
+@@ -290,5 +290,7 @@
 #define UBI32_CORE1_CLK				279
 #define UBI32_CORE2_CLK				280
-+#define NSSTCM_CLK_SRC				281
-+#define NSSTCM_CLK				282
+ #define EBI2_AON_CLK				281
+#define NSSTCM_CLK_SRC				282
+#define NSSTCM_CLK				283
 
 #endif
 --- a/include/dt-bindings/reset/qcom,gcc-ipq806x.h
--- a/target/linux/ipq806x/patches-3.18/707-ARM-dts-qcom-add-mdio-nodes-to-ap148-db149.patch
+++ b/target/linux/ipq806x/patches-3.18/707-ARM-dts-qcom-add-mdio-nodes-to-ap148-db149.patch
@@ -22,8 +22,8 @@ Signed-off-by: Mathieu Olivari <mathieu@codeaurora.org>
 	};
 
 	chosen {
-@@ -61,6 +62,15 @@
- 					bias-none;
+@@ -86,6 +87,15 @@
+ 					bias-bus-hold;
 				};
 			};
 +
@@ -38,9 +38,9 @@ Signed-off-by: Mathieu Olivari <mathieu@codeaurora.org>
 		};
 
 		gsbi@16300000 {
-@@ -174,5 +184,33 @@
- 			pinctrl-0 = <&pcie1_pins>;
- 			pinctrl-names = "default";
+@@ -209,6 +219,34 @@
+ 			nand-ecc-strength = <4>;
+ 			nand-bus-width = <8>;
 		};
 +
 +		mdio0: mdio {
@@ -72,6 +72,7 @@ Signed-off-by: Mathieu Olivari <mathieu@codeaurora.org>
 +		};
 	};
 };
+ 
 --- a/arch/arm/boot/dts/qcom-ipq8064-db149.dts
 +++ b/arch/arm/boot/dts/qcom-ipq8064-db149.dts
@@ -16,6 +16,7 @@
--- a/target/linux/ipq806x/patches-3.18/708-ARM-dts-qcom-add-gmac-nodes-to-ipq806x-platforms.patch
+++ b/target/linux/ipq806x/patches-3.18/708-ARM-dts-qcom-add-gmac-nodes-to-ipq806x-platforms.patch
@@ -12,7 +12,7 @@ Signed-off-by: Mathieu Olivari <mathieu@codeaurora.org>

 --- a/arch/arm/boot/dts/qcom-ipq8064-ap148.dts
 +++ b/arch/arm/boot/dts/qcom-ipq8064-ap148.dts
-@@ -71,6 +71,16 @@
+@@ -96,6 +96,16 @@
 					bias-disable;
 				};
 			};
@@ -29,7 +29,7 @@ Signed-off-by: Mathieu Olivari <mathieu@codeaurora.org>
 		};
 
 		gsbi@16300000 {
-@@ -212,5 +222,26 @@
+@@ -247,6 +257,27 @@
 				reg = <4>;
 			};
 		};
@@ -56,6 +56,7 @@ Signed-off-by: Mathieu Olivari <mathieu@codeaurora.org>
 +		};
 	};
 };
+ 
 --- a/arch/arm/boot/dts/qcom-ipq8064-db149.dts
 +++ b/arch/arm/boot/dts/qcom-ipq8064-db149.dts
@@ -75,6 +75,14 @@
@@ -116,7 +117,7 @@ Signed-off-by: Mathieu Olivari <mathieu@codeaurora.org>
 };
 --- a/arch/arm/boot/dts/qcom-ipq8064.dtsi
 +++ b/arch/arm/boot/dts/qcom-ipq8064.dtsi
-@@ -677,5 +677,91 @@
+@@ -693,5 +693,91 @@
 			status = "disabled";
 		};
 
--- a/target/linux/ipq806x/patches-4.1/161-mtd-nand-Create-a-BBT-flag-to-access-bad-block-markers-in-raw-mode.patch
+++ b/target/linux/ipq806x/patches-4.1/161-mtd-nand-Create-a-BBT-flag-to-access-bad-block-markers-in-raw-mode.patch
@@ -0,0 +1,84 @@
+Content-Type: text/plain; charset="utf-8"
+MIME-Version: 1.0
+Content-Transfer-Encoding: 7bit
+Subject: [v3,
+	1/5] mtd: nand: Create a BBT flag to access bad block markers in raw
+	mode
+From: Archit Taneja <architt@codeaurora.org>
+X-Patchwork-Id: 6927081
+Message-Id: <1438578498-32254-2-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>
+Date: Mon,  3 Aug 2015 10:38:14 +0530
+
+Some controllers can access the factory bad block marker from OOB only
+when they read it in raw mode. When ECC is enabled, these controllers
+discard reading/writing bad block markers, preventing access to them
+altogether.
+
+The bbt driver assumes MTD_OPS_PLACE_OOB when scanning for bad blocks.
+This results in the nand driver's ecc->read_oob() op to be called, which
+works with ECC enabled.
+
+Create a new BBT option flag that tells nand_bbt to force the mode to
+MTD_OPS_RAW. This would result in the correct op being called for the
+underlying nand controller driver.
+
+Reviewed-by: Andy Gross <agross@codeaurora.org>
+Signed-off-by: Archit Taneja <architt@codeaurora.org>
+
+---
+drivers/mtd/nand/nand_base.c | 6 +++++-
+ drivers/mtd/nand/nand_bbt.c  | 6 +++++-
+ include/linux/mtd/bbm.h      | 7 +++++++
+ 3 files changed, 17 insertions(+), 2 deletions(-)
+
+--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
+@@ -395,7 +395,11 @@ static int nand_default_block_markbad(st
+ 	} else {
+ 		ops.len = ops.ooblen = 1;
+ 	}
+-	ops.mode = MTD_OPS_PLACE_OOB;
+
+	if (unlikely(chip->bbt_options & NAND_BBT_ACCESS_BBM_RAW))
+		ops.mode = MTD_OPS_RAW;
+	else
+		ops.mode = MTD_OPS_PLACE_OOB;
+ 
+ 	/* Write to first/last page(s) if necessary */
+ 	if (chip->bbt_options & NAND_BBT_SCANLASTPAGE)
+--- a/drivers/mtd/nand/nand_bbt.c
+++ b/drivers/mtd/nand/nand_bbt.c
+@@ -423,7 +423,11 @@ static int scan_block_fast(struct mtd_in
+ 	ops.oobbuf = buf;
+ 	ops.ooboffs = 0;
+ 	ops.datbuf = NULL;
+-	ops.mode = MTD_OPS_PLACE_OOB;
+
+	if (unlikely(bd->options & NAND_BBT_ACCESS_BBM_RAW))
+		ops.mode = MTD_OPS_RAW;
+	else
+		ops.mode = MTD_OPS_PLACE_OOB;
+ 
+ 	for (j = 0; j < numpages; j++) {
+ 		/*
+--- a/include/linux/mtd/bbm.h
+++ b/include/linux/mtd/bbm.h
+@@ -116,6 +116,13 @@ struct nand_bbt_descr {
+ #define NAND_BBT_NO_OOB_BBM	0x00080000
+ 
+ /*
+ * Force MTD_OPS_RAW mode when trying to access bad block markes from OOB. To
+ * be used by controllers which can access BBM only when ECC is disabled, i.e,
+ * when in RAW access mode
+ */
+#define NAND_BBT_ACCESS_BBM_RAW	0x00100000
+
+/*
+  * Flag set by nand_create_default_bbt_descr(), marking that the nand_bbt_descr
+  * was allocated dynamicaly and must be freed in nand_release(). Has no meaning
+  * in nand_chip.bbt_options.
--- a/target/linux/ipq806x/patches-4.1/162-mtd-nand-Qualcomm-NAND-controller-driver.patch
+++ b/target/linux/ipq806x/patches-4.1/162-mtd-nand-Qualcomm-NAND-controller-driver.patch
--- a/target/linux/ipq806x/patches-4.1/163-dt-bindings-qcom_nandc-Add-DT-bindings.patch
+++ b/target/linux/ipq806x/patches-4.1/163-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 {
+	...
+	};
+};
--- a/target/linux/ipq806x/patches-4.1/164-arm-qcom-dts-Add-NAND-controller-node-for-ipq806x.patch
+++ b/target/linux/ipq806x/patches-4.1/164-arm-qcom-dts-Add-NAND-controller-node-for-ipq806x.patch
@@ -0,0 +1,50 @@
+Content-Type: text/plain; charset="utf-8"
+MIME-Version: 1.0
+Content-Transfer-Encoding: 7bit
+Subject: [v3,4/5] arm: qcom: dts: Add NAND controller node for ipq806x
+From: Archit Taneja <architt@codeaurora.org>
+X-Patchwork-Id: 6927121
+Message-Id: <1438578498-32254-5-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 10:38:17 +0530
+
+The nand controller in IPQ806x is of the 'EBI2 type'. Use the corresponding
+compatible string.
+
+Cc: devicetree@vger.kernel.org
+
+Reviewed-by: Andy Gross <agross@codeaurora.org>
+Signed-off-by: Archit Taneja <architt@codeaurora.org>
+
+---
+arch/arm/boot/dts/qcom-ipq8064.dtsi | 15 +++++++++++++++
+ 1 file changed, 15 insertions(+)
+
+--- a/arch/arm/boot/dts/qcom-ipq8064.dtsi
+++ b/arch/arm/boot/dts/qcom-ipq8064.dtsi
+@@ -615,5 +615,21 @@
+ 
+ 			status = "disabled";
+ 		};
+
+		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>;
+
+			status = "disabled";
+		};
+ 	};
+ };
--- a/target/linux/ipq806x/patches-4.1/165-arm-qcom-dts-Enable-NAND-node-on-IPQ8064-AP148-platform.patch
+++ b/target/linux/ipq806x/patches-4.1/165-arm-qcom-dts-Enable-NAND-node-on-IPQ8064-AP148-platform.patch
@@ -0,0 +1,76 @@
+Content-Type: text/plain; charset="utf-8"
+MIME-Version: 1.0
+Content-Transfer-Encoding: 7bit
+Subject: [v3,5/5] arm: qcom: dts: Enable NAND node on IPQ8064 AP148 platform
+From: Archit Taneja <architt@codeaurora.org>
+X-Patchwork-Id: 6927091
+Message-Id: <1438578498-32254-6-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 10:38:18 +0530
+
+Enable the NAND controller node on the AP148 platform. Provide pinmux
+information.
+
+Cc: devicetree@vger.kernel.org
+
+Signed-off-by: Archit Taneja <architt@codeaurora.org>
+
+---
+arch/arm/boot/dts/qcom-ipq8064-ap148.dts | 36 ++++++++++++++++++++++++++++++++
+ 1 file changed, 36 insertions(+)
+
+--- a/arch/arm/boot/dts/qcom-ipq8064-ap148.dts
+++ b/arch/arm/boot/dts/qcom-ipq8064-ap148.dts
+@@ -61,6 +61,28 @@
+ 					bias-none;
+ 				};
+ 			};
+			nand_pins: nand_pins {
+				mux {
+					pins = "gpio34", "gpio35", "gpio36",
+					       "gpio37", "gpio38", "gpio39",
+					       "gpio40", "gpio41", "gpio42",
+					       "gpio43", "gpio44", "gpio45",
+					       "gpio46", "gpio47";
+					function = "nand";
+					drive-strength = <10>;
+					bias-disable;
+				};
+				pullups {
+					pins = "gpio39";
+					bias-pull-up;
+				};
+				hold {
+					pins = "gpio40", "gpio41", "gpio42",
+					       "gpio43", "gpio44", "gpio45",
+					       "gpio46", "gpio47";
+					bias-bus-hold;
+				};
+			};
+ 		};
+ 
+ 		gsbi@16300000 {
+@@ -150,5 +172,19 @@
+ 			pinctrl-0 = <&pcie1_pins>;
+ 			pinctrl-names = "default";
+ 		};
+
+		nand@1ac00000 {
+			status = "ok";
+
+			pinctrl-0 = <&nand_pins>;
+			pinctrl-names = "default";
+
+			nand-ecc-strength = <4>;
+			nand-bus-width = <8>;
+		};
+ 	};
+ };
+
+&adm_dma {
+	status = "ok";
+};
--- a/target/linux/ipq806x/patches-4.1/707-ARM-dts-qcom-add-mdio-nodes-to-ap148-db149.patch
+++ b/target/linux/ipq806x/patches-4.1/707-ARM-dts-qcom-add-mdio-nodes-to-ap148-db149.patch
@@ -22,8 +22,8 @@ Signed-off-by: Mathieu Olivari <mathieu@codeaurora.org>
 	};
 
 	chosen {
-@@ -61,6 +62,15 @@
- 					bias-none;
+@@ -83,6 +84,15 @@
+ 					bias-bus-hold;
 				};
 			};
 +
@@ -38,9 +38,9 @@ Signed-off-by: Mathieu Olivari <mathieu@codeaurora.org>
 		};
 
 		gsbi@16300000 {
-@@ -150,5 +160,33 @@
- 			pinctrl-0 = <&pcie1_pins>;
- 			pinctrl-names = "default";
+@@ -182,6 +192,34 @@
+ 			nand-ecc-strength = <4>;
+ 			nand-bus-width = <8>;
 		};
 +
 +		mdio0: mdio {
@@ -72,6 +72,7 @@ Signed-off-by: Mathieu Olivari <mathieu@codeaurora.org>
 +		};
 	};
 };
+ 
 --- a/arch/arm/boot/dts/qcom-ipq8064-db149.dts
 +++ b/arch/arm/boot/dts/qcom-ipq8064-db149.dts
@@ -16,6 +16,7 @@
--- a/target/linux/ipq806x/patches-4.1/708-ARM-dts-qcom-add-gmac-nodes-to-ipq806x-platforms.patch
+++ b/target/linux/ipq806x/patches-4.1/708-ARM-dts-qcom-add-gmac-nodes-to-ipq806x-platforms.patch
@@ -12,7 +12,7 @@ Signed-off-by: Mathieu Olivari <mathieu@codeaurora.org>

 --- a/arch/arm/boot/dts/qcom-ipq8064-ap148.dts
 +++ b/arch/arm/boot/dts/qcom-ipq8064-ap148.dts
-@@ -71,6 +71,16 @@
+@@ -93,6 +93,16 @@
 					bias-disable;
 				};
 			};
@@ -29,7 +29,7 @@ Signed-off-by: Mathieu Olivari <mathieu@codeaurora.org>
 		};
 
 		gsbi@16300000 {
-@@ -188,5 +198,26 @@
+@@ -220,6 +230,27 @@
 				reg = <4>;
 			};
 		};
@@ -56,6 +56,7 @@ Signed-off-by: Mathieu Olivari <mathieu@codeaurora.org>
 +		};
 	};
 };
+ 
 --- a/arch/arm/boot/dts/qcom-ipq8064-db149.dts
 +++ b/arch/arm/boot/dts/qcom-ipq8064-db149.dts
@@ -75,6 +75,14 @@
@@ -116,7 +117,7 @@ Signed-off-by: Mathieu Olivari <mathieu@codeaurora.org>
 };
 --- a/arch/arm/boot/dts/qcom-ipq8064.dtsi
 +++ b/arch/arm/boot/dts/qcom-ipq8064.dtsi
-@@ -615,5 +615,91 @@
+@@ -631,5 +631,91 @@
 
 			status = "disabled";
 		};