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>
diff --git a/drivers/mtd/nand/raw/atmel/Makefile b/drivers/mtd/nand/raw/atmel/Makefile
new file mode 100644
index 0000000..6708416
--- /dev/null
+++ b/drivers/mtd/nand/raw/atmel/Makefile
@@ -0,0 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
+obj-$(CONFIG_DM_NAND_ATMEL) += atmel-nand-controller.o
+
+atmel-nand-controller-objs := nand-controller.o