target/linux/ramips/patches-5.15/410-mtd-rawnand-add-driver-support-for-MT7621-nand-flash.patch

   1 From e84e2430ee0e483842b4ff013ae8a6e7e2fa2734 Mon Sep 17 00:00:00 2001
   2 From: Weijie Gao <weijie.gao@mediatek.com>
   3 Date: Wed, 1 Apr 2020 02:07:58 +0800
   4 Subject: [PATCH 1/2] mtd: rawnand: add driver support for MT7621 nand
   5  flash controller
   6
   7 This patch adds NAND flash controller driver for MediaTek MT7621 SoC.
   8
   9 The NAND flash controller is similar with controllers described in
  10 mtk_nand.c, except that the controller from MT7621 doesn't support DMA
  11 transmission, and some registers' offset and fields are different.
  12
  13 Signed-off-by: Weijie Gao <weijie.gao@mediatek.com>
  14 ---
  15  drivers/mtd/nand/raw/Kconfig       |    8 +
  16  drivers/mtd/nand/raw/Makefile      |    1 +
  17  drivers/mtd/nand/raw/mt7621_nand.c | 1348 ++++++++++++++++++++++++++++++++++++
  18  3 files changed, 1357 insertions(+)
  19  create mode 100644 drivers/mtd/nand/raw/mt7621_nand.c
  20
  21 --- a/drivers/mtd/nand/raw/Kconfig
  22 +++ b/drivers/mtd/nand/raw/Kconfig
  23 @@ -358,6 +358,14 @@ config MTD_NAND_QCOM
  24           Enables support for NAND flash chips on SoCs containing the EBI2 NAND
  25           controller. This controller is found on IPQ806x SoC.
  26
  27 +config MTD_NAND_MT7621
  28 +       tristate "MT7621 NAND controller"
  29 +       depends on SOC_MT7621 || COMPILE_TEST
  30 +       depends on HAS_IOMEM
  31 +       help
  32 +         Enables support for NAND controller on MT7621 SoC.
  33 +         This driver uses PIO mode for data transmission instead of DMA mode.
  34 +
  35  config MTD_NAND_MTK
  36         tristate "MTK NAND controller"
  37         depends on ARCH_MEDIATEK || COMPILE_TEST
  38 --- a/drivers/mtd/nand/raw/Makefile
  39 +++ b/drivers/mtd/nand/raw/Makefile
  40 @@ -48,6 +48,7 @@ obj-$(CONFIG_MTD_NAND_SUNXI)          += sunxi_n
  41  obj-$(CONFIG_MTD_NAND_HISI504)         += hisi504_nand.o
  42  obj-$(CONFIG_MTD_NAND_BRCMNAND)                += brcmnand/
  43  obj-$(CONFIG_MTD_NAND_QCOM)            += qcom_nandc.o
  44 +obj-$(CONFIG_MTD_NAND_MT7621)          += mt7621_nand.o
  45  obj-$(CONFIG_MTD_NAND_MTK)             += mtk_ecc.o mtk_nand.o
  46  obj-$(CONFIG_MTD_NAND_MXIC)            += mxic_nand.o
  47  obj-$(CONFIG_MTD_NAND_TEGRA)           += tegra_nand.o