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 --- MAINTAINERS | 1 + drivers/memory/Kconfig | 7 +++++++ drivers/memory/Makefile | 1 + drivers/memory/atmel_ebi.c | 37 +++++++++++++++++++++++++++++++++++++ 4 files changed, 46 insertions(+) create mode 100644 drivers/memory/atmel_ebi.c
diff --git a/MAINTAINERS b/MAINTAINERS index fa8c13fc7d..6d3f4c58a0 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -386,6 +386,7 @@ T: git https://source.denx.de/u-boot/custodians/u-boot-atmel.git 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 7271892763..759151a452 100644 --- a/drivers/memory/Kconfig +++ b/drivers/memory/Kconfig @@ -24,4 +24,11 @@ config TI_AEMIF of 256M bytes of any of these memories can be accessed at a given time via four chip selects with 64M byte access per chip select.
+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 + endmenu diff --git a/drivers/memory/Makefile b/drivers/memory/Makefile index fec52efb60..1d24009e86 100644 --- a/drivers/memory/Makefile +++ b/drivers/memory/Makefile @@ -1,3 +1,4 @@
obj-$(CONFIG_STM32_FMC2_EBI) += stm32-fmc2-ebi.o +obj-$(CONFIG_ATMEL_EBI) += atmel_ebi.o obj-$(CONFIG_TI_AEMIF) += ti-aemif.o diff --git a/drivers/memory/atmel_ebi.c b/drivers/memory/atmel_ebi.c new file mode 100644 index 0000000000..4739eef1b7 --- /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, +};