[RFC,v2 1/4] mtd: ecc: move mediatek HW ECC driver

[Xiangsheng Hou]

Move Mediatek HW ECC source driver to mtd nand folder and the header
file to include linux mtd folder.
The HW ECC driver can be used by Mediatek raw nand and spi nand
controller.

Signed-off-by: Xiangsheng Hou <xiangsheng.hou at mediatek.com>
---
 drivers/mtd/nand/Kconfig                              | 9 +++++++++
 drivers/mtd/nand/Makefile                             | 1 +
 drivers/mtd/nand/{raw => }/mtk_ecc.c                  | 2 +-
 drivers/mtd/nand/raw/Kconfig                          | 1 +
 drivers/mtd/nand/raw/Makefile                         | 2 +-
 drivers/mtd/nand/raw/mtk_nand.c                       | 2 +-
 {drivers/mtd/nand/raw => include/linux/mtd}/mtk_ecc.h | 0
 7 files changed, 14 insertions(+), 3 deletions(-)
 rename drivers/mtd/nand/{raw => }/mtk_ecc.c (99%)
 rename {drivers/mtd/nand/raw => include/linux/mtd}/mtk_ecc.h (100%)

diff --git a/drivers/mtd/nand/Kconfig b/drivers/mtd/nand/Kconfig
index b40455234cbd..e657823329d2 100644
--- a/drivers/mtd/nand/Kconfig
+++ b/drivers/mtd/nand/Kconfig
@@ -46,6 +46,15 @@ config MTD_NAND_ECC_SW_BCH
 	  ECC codes. They are used with NAND devices requiring more than 1 bit
 	  of error correction.
 
+config MTD_NAND_ECC_MTK
+	bool "Mediatek hardware ECC engine"
+	select MTD_NAND_ECC
+	help
+	  This enables support for Mediatek hardware ECC engine which
+	  used for error correction. This correction strength depends
+	  on different project. The ECC engine can be used with Mediatek
+	  raw nand and spi nand controller driver.
+
 endmenu
 
 endmenu
diff --git a/drivers/mtd/nand/Makefile b/drivers/mtd/nand/Makefile
index 1c0b46960eb1..66d1741fe7ff 100644
--- a/drivers/mtd/nand/Makefile
+++ b/drivers/mtd/nand/Makefile
@@ -10,3 +10,4 @@ obj-y	+= spi/
 nandcore-$(CONFIG_MTD_NAND_ECC) += ecc.o
 nandcore-$(CONFIG_MTD_NAND_ECC_SW_HAMMING) += ecc-sw-hamming.o
 nandcore-$(CONFIG_MTD_NAND_ECC_SW_BCH) += ecc-sw-bch.o
+nandcore-$(CONFIG_MTD_NAND_ECC_MTK) += mtk_ecc.o
diff --git a/drivers/mtd/nand/raw/mtk_ecc.c b/drivers/mtd/nand/mtk_ecc.c
similarity index 99%
rename from drivers/mtd/nand/raw/mtk_ecc.c
rename to drivers/mtd/nand/mtk_ecc.c
index c437d97debb8..ce0f8b491e5d 100644
--- a/drivers/mtd/nand/raw/mtk_ecc.c
+++ b/drivers/mtd/nand/mtk_ecc.c
@@ -16,7 +16,7 @@
 #include <linux/of_platform.h>
 #include <linux/mutex.h>
 
-#include "mtk_ecc.h"
+#include <linux/mtd/mtk_ecc.h>
 
 #define ECC_IDLE_MASK		BIT(0)
 #define ECC_IRQ_EN		BIT(0)
diff --git a/drivers/mtd/nand/raw/Kconfig b/drivers/mtd/nand/raw/Kconfig
index 67b7cb67c030..c90bc166034b 100644
--- a/drivers/mtd/nand/raw/Kconfig
+++ b/drivers/mtd/nand/raw/Kconfig
@@ -362,6 +362,7 @@ config MTD_NAND_MTK
 	tristate "MTK NAND controller"
 	depends on ARCH_MEDIATEK || COMPILE_TEST
 	depends on HAS_IOMEM
+	select MTD_NAND_ECC_MTK
 	help
 	  Enables support for NAND controller on MTK SoCs.
 	  This controller is found on mt27xx, mt81xx, mt65xx SoCs.
diff --git a/drivers/mtd/nand/raw/Makefile b/drivers/mtd/nand/raw/Makefile
index 2f97958c3a33..49d3946c166b 100644
--- a/drivers/mtd/nand/raw/Makefile
+++ b/drivers/mtd/nand/raw/Makefile
@@ -48,7 +48,7 @@ obj-$(CONFIG_MTD_NAND_SUNXI)		+= sunxi_nand.o
 obj-$(CONFIG_MTD_NAND_HISI504)	        += hisi504_nand.o
 obj-$(CONFIG_MTD_NAND_BRCMNAND)		+= brcmnand/
 obj-$(CONFIG_MTD_NAND_QCOM)		+= qcom_nandc.o
-obj-$(CONFIG_MTD_NAND_MTK)		+= mtk_ecc.o mtk_nand.o
+obj-$(CONFIG_MTD_NAND_MTK)		+= mtk_nand.o
 obj-$(CONFIG_MTD_NAND_MXIC)		+= mxic_nand.o
 obj-$(CONFIG_MTD_NAND_TEGRA)		+= tegra_nand.o
 obj-$(CONFIG_MTD_NAND_STM32_FMC2)	+= stm32_fmc2_nand.o
diff --git a/drivers/mtd/nand/raw/mtk_nand.c b/drivers/mtd/nand/raw/mtk_nand.c
index 5c5c92132287..7d8a6b35c102 100644
--- a/drivers/mtd/nand/raw/mtk_nand.c
+++ b/drivers/mtd/nand/raw/mtk_nand.c
@@ -17,7 +17,7 @@
 #include <linux/iopoll.h>
 #include <linux/of.h>
 #include <linux/of_device.h>
-#include "mtk_ecc.h"
+#include <linux/mtd/mtk_ecc.h>
 
 /* NAND controller register definition */
 #define NFI_CNFG		(0x00)
diff --git a/drivers/mtd/nand/raw/mtk_ecc.h b/include/linux/mtd/mtk_ecc.h
similarity index 100%
rename from drivers/mtd/nand/raw/mtk_ecc.h
rename to include/linux/mtd/mtk_ecc.h
-- 
2.25.1