commit fe33c7d3d7b6bed98ce4e25c04189028949b4fa5
author Balamanikandan Gunasundar <balamanikandan.gunasundar@microchip.com> Tue Oct 25 16:21:01 2022 +0530
committer Eugen Hristev <eugen.hristev@microchip.com> Thu Dec 08 18:06:18 2022 +0200
tree 1f359cb505c3a19a5464dbe2a6a6cd02c9d88343
parent 040227f76d410c389d4403dc505f43173a9b3875

nand: atmel: Add DM based NAND driver

This implementation is ported from the rework done by Boris Brezillon
in Linux. This porting is done based on linux-5.4-at91. The driver is
tested in sam9x60ek, sama5d3_xplained, sam9x75eb and sama7g54-ddr3-eb.

Changes done includes

- Adapt GPIO descriptor apis for U-Boot. Use gpio_request_by_name_nodev,
  dm_gpio_get_value etc.
- Use U_BOOT_DRIVER instead of platform_driver.
- Replace struct platform_device with struct udevice
- Check the status of nfc exec operation by polling the status
  register instead of interrupt based handling
- DMA operations not supported. Remove it
- Adapt DT parsing to U-Boot APIs

Signed-off-by: Balamanikandan Gunasundar <balamanikandan.gunasundar@microchip.com>

drivers/mtd/nand/raw/Kconfig

diff --git a/drivers/mtd/nand/raw/Kconfig b/drivers/mtd/nand/raw/Kconfig
index 338a356..0f2eaeb 100644
--- a/drivers/mtd/nand/raw/Kconfig
+++ b/drivers/mtd/nand/raw/Kconfig
@@ -45,6 +45,14 @@
 	bool "Disable subpage write support"
 	depends on NAND_ARASAN || NAND_DAVINCI || NAND_KIRKWOOD
 
+config DM_NAND_ATMEL
+       bool "Support Atmel NAND controller with DM support"
+       select SYS_NAND_SELF_INIT
+       imply SYS_NAND_USE_FLASH_BBT
+       help
+         Enable this driver for NAND flash platforms using an Atmel NAND
+         controller.
+
 config NAND_ATMEL
 	bool "Support Atmel NAND controller"
 	select SYS_NAND_SELF_INIT