memory: atmel-sdramc: remove the driver

Driver does only clock request + enable for DDR clocks. DDR clocks are
enabled by bootloader and need to stay that way in Linux. To avoid having
these clocks disabled by clock subsystem in case there are no Linux
consumers for them the clocks were marked as critical in clock drivers
(in commit 68b3b6f ("clk: at91: mark ddr clocks as critical")).
With this, there is no need to have a separate driver that only does
clock request + enable.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Link: https://lore.kernel.org/r/20230516072405.2696225-1-claudiu.beznea@microchip.com
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

Author: claudiubeznea

arch/arm/mach-at91/Kconfig

@@ -97,7 +97,6 @@ config SOC_AT91SAM9
 	depends on ARCH_MULTI_V5
 	select ATMEL_AIC_IRQ
 	select ATMEL_PM if PM
-	select ATMEL_SDRAMC
 	select CPU_ARM926T
 	select HAVE_AT91_SMD
 	select HAVE_AT91_USB_CLK
@@ -131,7 +130,6 @@ config SOC_SAM9X60
 	depends on ARCH_MULTI_V5
 	select ATMEL_AIC5_IRQ
 	select ATMEL_PM if PM
-	select ATMEL_SDRAMC
 	select CPU_ARM926T
 	select HAVE_AT91_USB_CLK
 	select HAVE_AT91_GENERATED_CLK
@@ -213,7 +211,6 @@ config SOC_SAMA5
 	bool
 	select ATMEL_AIC5_IRQ
 	select ATMEL_PM if PM
-	select ATMEL_SDRAMC
 	select MEMORY
 	select SOC_SAM_V7
 	select SRAM if PM
@@ -234,7 +231,6 @@ config SOC_SAMA7
 	bool
 	select ARM_GIC
 	select ATMEL_PM if PM
-	select ATMEL_SDRAMC
 	select MEMORY
 	select SOC_SAM_V7
 	select SRAM if PM

drivers/memory/Kconfig

@@ -30,17 +30,6 @@ config ARM_PL172_MPMC
 	  If you have an embedded system with an AMBA bus and a PL172
 	  controller, say Y or M here.
 
-config ATMEL_SDRAMC
-	bool "Atmel (Multi-port DDR-)SDRAM Controller"
-	default y if ARCH_AT91
-	depends on ARCH_AT91 || COMPILE_TEST
-	depends on OF
-	help
-	  This driver is for Atmel SDRAM Controller or Atmel Multi-port
-	  DDR-SDRAM Controller available on Atmel AT91SAM9 and SAMA5 SoCs.
-	  Starting with the at91sam9g45, this controller supports SDR, DDR and
-	  LP-DDR memories.
-
 config ATMEL_EBI
 	bool "Atmel EBI driver"
 	default y if ARCH_AT91

drivers/memory/Makefile

@@ -8,7 +8,6 @@ ifeq ($(CONFIG_DDR),y)
 obj-$(CONFIG_OF)		+= of_memory.o
 endif
 obj-$(CONFIG_ARM_PL172_MPMC)	+= pl172.o
-obj-$(CONFIG_ATMEL_SDRAMC)	+= atmel-sdramc.o
 obj-$(CONFIG_ATMEL_EBI)		+= atmel-ebi.o
 obj-$(CONFIG_BRCMSTB_DPFE)	+= brcmstb_dpfe.o
 obj-$(CONFIG_BRCMSTB_MEMC)	+= brcmstb_memc.o