Enable QPIC SPI NAND flash controller support on the IPQ5424 RDP466
reference design platform.

The RDP466 board features a SPI NAND flash device connected to the QPIC
controller for primary storage. This patch enables the QPIC BAM DMA
controller and SPI NAND interface of QPIC, and configures the necessary
pin control settings for proper operation.

Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Signed-off-by: Md Sadre Alam <quic_mdalam@quicinc.com>
---

Change in [v6]

* Squash the eMMC removal changes

Change in [v5]

* No Change

Change in [v4]

* No Change

Change in [v3]

* No Change

Change in [v2]

* Added Reviewed-by tag

* Added \n before status in qpic_nand node

Change in [v1]

* Enable bam and spi nand for ipq5424

 arch/arm64/boot/dts/qcom/ipq5424-rdp466.dts | 44 ++++++++++++++-------
 1 file changed, 29 insertions(+), 15 deletions(-)

diff --git a/arch/arm64/boot/dts/qcom/ipq5424-rdp466.dts b/arch/arm64/boot/dts/qcom/ipq5424-rdp466.dts
index 738618551203..de71b72ae6dc 100644
--- a/arch/arm64/boot/dts/qcom/ipq5424-rdp466.dts
+++ b/arch/arm64/boot/dts/qcom/ipq5424-rdp466.dts
@@ -124,13 +124,6 @@ &qusb_phy_1 {
 	status = "okay";
 };
 
-&sdhc {
-	pinctrl-0 = <&sdc_default_state>;
-	pinctrl-names = "default";
-
-	status = "okay";
-};
-
 &sleep_clk {
 	clock-frequency = <32000>;
 };
@@ -201,26 +194,26 @@ mosi-pins {
 		};
 	};
 
-	sdc_default_state: sdc-default-state {
-		clk-pins {
+	qpic_snand_default_state: qpic-snand-default-state {
+		clock-pins {
 			pins = "gpio5";
-			function = "sdc_clk";
+			function = "qspi_clk";
 			drive-strength = <8>;
-			bias-disable;
+			bias-pull-down;
 		};
 
-		cmd-pins {
+		cs-pins {
 			pins = "gpio4";
-			function = "sdc_cmd";
+			function = "qspi_cs";
 			drive-strength = <8>;
 			bias-pull-up;
 		};
 
 		data-pins {
 			pins = "gpio0", "gpio1", "gpio2", "gpio3";
-			function = "sdc_data";
+			function = "qspi_data";
 			drive-strength = <8>;
-			bias-pull-up;
+			bias-pull-down;
 		};
 	};
 
@@ -246,6 +239,27 @@ pcie3_default_state: pcie3-default-state {
 	};
 };
 
+&qpic_bam {
+	status = "okay";
+};
+
+&qpic_nand {
+	pinctrl-0 = <&qpic_snand_default_state>;
+	pinctrl-names = "default";
+
+	status = "okay";
+
+	flash@0 {
+		compatible = "spi-nand";
+		reg = <0>;
+		#address-cells = <1>;
+		#size-cells = <1>;
+		nand-ecc-engine = <&qpic_nand>;
+		nand-ecc-strength = <4>;
+		nand-ecc-step-size = <512>;
+	};
+};
+
 &uart0 {
 	pinctrl-0 = <&uart0_pins>;
 	pinctrl-names = "default";
-- 
2.34.1