From e84e2430ee0e483842b4ff013ae8a6e7e2fa2734 Mon Sep 17 00:00:00 2001 From: Weijie Gao Date: Wed, 1 Apr 2020 02:07:58 +0800 Subject: [PATCH 1/2] mtd: rawnand: add driver support for MT7621 nand flash controller This patch adds NAND flash controller driver for MediaTek MT7621 SoC. The NAND flash controller is similar with controllers described in mtk_nand.c, except that the controller from MT7621 doesn't support DMA transmission, and some registers' offset and fields are different. Signed-off-by: Weijie Gao --- drivers/mtd/nand/raw/Kconfig | 8 + drivers/mtd/nand/raw/Makefile | 1 + drivers/mtd/nand/raw/mt7621_nand.c | 1348 ++++++++++++++++++++++++++++++++++++ 3 files changed, 1357 insertions(+) create mode 100644 drivers/mtd/nand/raw/mt7621_nand.c --- a/drivers/mtd/nand/raw/Kconfig +++ b/drivers/mtd/nand/raw/Kconfig @@ -337,6 +337,14 @@ config MTD_NAND_QCOM Enables support for NAND flash chips on SoCs containing the EBI2 NAND controller. This controller is found on IPQ806x SoC. +config MTD_NAND_MT7621 + tristate "MT7621 NAND controller" + depends on SOC_MT7621 || COMPILE_TEST + depends on HAS_IOMEM + help + Enables support for NAND controller on MT7621 SoC. + This driver uses PIO mode for data transmission instead of DMA mode. + config MTD_NAND_MTK tristate "MTK NAND controller" depends on MTD_NAND_ECC_MEDIATEK --- a/drivers/mtd/nand/raw/Makefile +++ b/drivers/mtd/nand/raw/Makefile @@ -46,6 +46,7 @@ obj-$(CONFIG_MTD_NAND_SUNXI) += sunxi_n obj-$(CONFIG_MTD_NAND_HISI504) += hisi504_nand.o obj-$(CONFIG_MTD_NAND_BRCMNAND) += brcmnand/ obj-$(CONFIG_MTD_NAND_QCOM) += qcom_nandc.o +obj-$(CONFIG_MTD_NAND_MT7621) += mt7621_nand.o obj-$(CONFIG_MTD_NAND_MTK) += mtk_nand.o obj-$(CONFIG_MTD_NAND_MXIC) += mxic_nand.o obj-$(CONFIG_MTD_NAND_TEGRA) += tegra_nand.o