memory: atmel-ebi: add Atmel EBI (External Bus Interface) driver
The EBI is used to access peripherals like NAND, SRAM, NOR etc. Add
this driver to probe the nand flash controller. This is a dummy driver
and not yet a complete device driver for EBI.
Signed-off-by: Balamanikandan Gunasundar <balamanikandan.gunasundar@microchip.com>
diff --git a/MAINTAINERS b/MAINTAINERS
index 75b27bc..3a0aab4 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -409,6 +409,7 @@
F: arch/arm/mach-at91/
F: board/atmel/
F: drivers/cpu/at91_cpu.c
+F: drivers/memory/atmel-ebi.c
F: drivers/misc/microchip_flexcom.c
F: drivers/timer/atmel_tcb_timer.c
F: include/dt-bindings/mfd/atmel-flexcom.h
diff --git a/drivers/memory/Kconfig b/drivers/memory/Kconfig
index 56b89f1..22cb9d6 100644
--- a/drivers/memory/Kconfig
+++ b/drivers/memory/Kconfig
@@ -13,6 +13,13 @@
SRAM, Ethernet adapters, FPGAs, etc.
For now this uclass has no methods yet.
+config ATMEL_EBI
+ bool "Support for Atmel EBI"
+ help
+ Driver for Atmel EBI controller. This is a dummy
+ driver. Doesn't provide an access to EBI controller. Select
+ this option to enable the NAND flash controller driver
+
config SANDBOX_MEMORY
bool "Enable Sandbox Memory Controller driver"
depends on SANDBOX && MEMORY
diff --git a/drivers/memory/Makefile b/drivers/memory/Makefile
index 2b196d7..1cabf8a 100644
--- a/drivers/memory/Makefile
+++ b/drivers/memory/Makefile
@@ -2,5 +2,6 @@
obj-$(CONFIG_MEMORY) += memory-uclass.o
obj-$(CONFIG_SANDBOX_MEMORY) += memory-sandbox.o
obj-$(CONFIG_STM32_FMC2_EBI) += stm32-fmc2-ebi.o
+obj-$(CONFIG_ATMEL_EBI) += atmel_ebi.o
obj-$(CONFIG_TI_AEMIF) += ti-aemif.o
obj-$(CONFIG_TI_GPMC) += ti-gpmc.o
diff --git a/drivers/memory/atmel_ebi.c b/drivers/memory/atmel_ebi.c
new file mode 100644
index 0000000..4739eef
--- /dev/null
+++ b/drivers/memory/atmel_ebi.c
@@ -0,0 +1,37 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2022 Microchip Technology Inc. and its subsidiaries
+ */
+
+#include <dm/device.h>
+#include <dm/read.h>
+#include <dm/uclass.h>
+#include <fdtdec.h>
+
+static int atmel_ebi_probe(struct udevice *dev)
+{
+ int ret;
+ struct udevice *ndev;
+
+ ret = uclass_get_device_by_driver(UCLASS_MTD,
+ DM_DRIVER_GET(atmel_nand_controller),
+ &ndev);
+ if (ret)
+ printf("Failed to probe nand driver (err = %d)\n", ret);
+
+ return ret;
+}
+
+static const struct udevice_id atmel_ebi_match[] = {
+ {.compatible = "microchip,sam9x60-ebi"},
+ {.compatible = "atmel,sama5d3-ebi"},
+ { /* Sentinel */ }
+};
+
+U_BOOT_DRIVER(atmel_ebi) = {
+ .name = "atmel_ebi",
+ .id = UCLASS_NOP,
+ .of_match = atmel_ebi_match,
+ .probe = atmel_ebi_probe,
+ .bind = dm_scan_fdt_dev,
+};