spi: spi-qpic: add driver for QCOM SPI NAND flash Interface

This driver implements support for the SPI-NAND mode of QCOM NAND Flash
Interface as a SPI-MEM controller with pipelined ECC capability.

Co-developed-by: Sricharan Ramabadhran <quic_srichara@quicinc.com>
Signed-off-by: Sricharan Ramabadhran <quic_srichara@quicinc.com>
Co-developed-by: Varadarajan Narayanan <quic_varada@quicinc.com>
Signed-off-by: Varadarajan Narayanan <quic_varada@quicinc.com>
Signed-off-by: Md Sadre Alam <quic_mdalam@quicinc.com>
Link: https://patch.msgid.link/20250224111414.2809669-3-quic_mdalam@quicinc.com
Signed-off-by: Mark Brown <broonie@kernel.org>

Author: Md Sadre Alam

drivers/mtd/nand/Makefile

@@ -3,7 +3,11 @@
 nandcore-objs := core.o bbt.o
 obj-$(CONFIG_MTD_NAND_CORE) += nandcore.o
 obj-$(CONFIG_MTD_NAND_ECC_MEDIATEK) += ecc-mtk.o
+ifeq ($(CONFIG_SPI_QPIC_SNAND),y)
+obj-$(CONFIG_SPI_QPIC_SNAND) += qpic_common.o
+else
 obj-$(CONFIG_MTD_NAND_QCOM) += qpic_common.o
+endif
 obj-y	+= onenand/
 obj-y	+= raw/
 obj-y	+= spi/

drivers/spi/Kconfig

@@ -936,6 +936,15 @@ config SPI_QCOM_QSPI
 	help
 	  QSPI(Quad SPI) driver for Qualcomm QSPI controller.
 
+config SPI_QPIC_SNAND
+	bool "QPIC SNAND controller"
+	depends on ARCH_QCOM || COMPILE_TEST
+	select MTD
+	help
+	  QPIC_SNAND (QPIC SPI NAND) driver for Qualcomm QPIC controller.
+	  QPIC controller supports both parallel nand and serial nand.
+	  This config will enable serial nand driver for QPIC controller.
+
 config SPI_QUP
 	tristate "Qualcomm SPI controller with QUP interface"
 	depends on ARCH_QCOM || COMPILE_TEST

drivers/spi/Makefile

@@ -117,6 +117,7 @@ obj-$(CONFIG_SPI_PXA2XX)		+= spi-pxa2xx-platform.o
 obj-$(CONFIG_SPI_PXA2XX_PCI)		+= spi-pxa2xx-pci.o
 obj-$(CONFIG_SPI_QCOM_GENI)		+= spi-geni-qcom.o
 obj-$(CONFIG_SPI_QCOM_QSPI)		+= spi-qcom-qspi.o
+obj-$(CONFIG_SPI_QPIC_SNAND)            += spi-qpic-snand.o
 obj-$(CONFIG_SPI_QUP)			+= spi-qup.o
 obj-$(CONFIG_SPI_ROCKCHIP)		+= spi-rockchip.o
 obj-$(CONFIG_SPI_ROCKCHIP_SFC)		+= spi-rockchip-sfc.o