m68k: coldfire: drop ISA_DMA_API support

After a build regression report, I took a look at possible users of
CONFIG_ISA_DMA_API on m68k and found none, which Greg confirmed. The
CONFIG_GENERIC_ISA_DMA option in turn is only needed to implement
ISA_DMA_API, and is clearly not used on the platforms with ISA support.

The CONFIG_ISA support for AMIGA_PCMCIA is probably also unneeded,
but this is less clear. Unlike other PCMCIA implementations, this one
does not use the drivers/pcmcia subsystem at all and just supports
the "apne" network driver. When it was first added, one could use
ISA drivers on it as well, but this probably broke at some point.

With no reason to keep this, let's just drop the corresponding files
and prevent the remaining ISA drivers that use this from getting built.

The remaining definitions in asm/dma.h are used for PCI support.

Link: https://lore.kernel.org/lkml/9e5ee1c3-ca80-f343-a1f5-66f3dd1c0727@linux-m68k.org/Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org> # For MMC
Acked-by: Greg Ungerer <gerg@linux-m68k.org>
Acked-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Ungerer <gerg@linux-m68k.org>

arch/m68k/Kconfig.bus

@@ -56,16 +56,6 @@ config ATARI_ROM_ISA
 	  The only driver currently using this adapter is the EtherNEC
 	  driver for RTL8019AS based NE2000 compatible network cards.
 
-config GENERIC_ISA_DMA
-	def_bool ISA
-
 source "drivers/zorro/Kconfig"
 
 endif
-
-if COLDFIRE
-
-config ISA_DMA_API
-	def_bool !M5272
-
-endif

arch/m68k/coldfire/Makefile

@@ -15,7 +15,7 @@
 
 asflags-$(CONFIG_FULLDEBUG) := -DDEBUGGER_COMPATIBLE_CACHE=1
 
-obj-$(CONFIG_COLDFIRE)	+= cache.o clk.o device.o dma.o entry.o vectors.o
+obj-$(CONFIG_COLDFIRE)	+= cache.o clk.o device.o entry.o vectors.o
 obj-$(CONFIG_M5206)	+= m5206.o intc.o reset.o
 obj-$(CONFIG_M5206e)	+= m5206.o intc.o reset.o
 obj-$(CONFIG_M520x)	+= m520x.o intc-simr.o reset.o

arch/m68k/coldfire/dma.c

-// SPDX-License-Identifier: GPL-2.0
-/***************************************************************************/
-
-/*
- *	dma.c -- Freescale ColdFire DMA support
- *
- *	Copyright (C) 2007, Greg Ungerer (gerg@snapgear.com)
- */
-
-/***************************************************************************/
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <asm/dma.h>
-#include <asm/coldfire.h>
-#include <asm/mcfsim.h>
-#include <asm/mcfdma.h>
-
-/***************************************************************************/
-
-/*
- *      DMA channel base address table.
- */
-unsigned int dma_base_addr[MAX_M68K_DMA_CHANNELS] = {
-#ifdef MCFDMA_BASE0
-	MCFDMA_BASE0,
-#endif
-#ifdef MCFDMA_BASE1
-	MCFDMA_BASE1,
-#endif
-#ifdef MCFDMA_BASE2
-	MCFDMA_BASE2,
-#endif
-#ifdef MCFDMA_BASE3
-	MCFDMA_BASE3,
-#endif
-};
-EXPORT_SYMBOL(dma_base_addr);
-
-unsigned int dma_device_address[MAX_M68K_DMA_CHANNELS];
-EXPORT_SYMBOL(dma_device_address);
-
-/***************************************************************************/

arch/m68k/mm/motorola.c

@@ -27,7 +27,6 @@
 #include <asm/pgalloc.h>
 #include <asm/machdep.h>
 #include <asm/io.h>
-#include <asm/dma.h>
 #ifdef CONFIG_ATARI
 #include <asm/atari_stram.h>
 #endif

drivers/mmc/host/Kconfig

@@ -508,7 +508,7 @@ config MMC_OMAP_HS
 
 config MMC_WBSD
 	tristate "Winbond W83L51xD SD/MMC Card Interface support"
-	depends on ISA_DMA_API && !M68K
+	depends on ISA_DMA_API
 	help
 	  This selects the Winbond(R) W83L51xD Secure digital and
 	  Multimedia card Interface.

sound/core/Makefile

@@ -9,9 +9,7 @@ ifneq ($(CONFIG_SND_PROC_FS),)
 snd-y += info.o
 snd-$(CONFIG_SND_OSSEMUL) += info_oss.o
 endif
-ifneq ($(CONFIG_M68K),y)
 snd-$(CONFIG_ISA_DMA_API) += isadma.o
-endif
 snd-$(CONFIG_SND_OSSEMUL) += sound_oss.o
 snd-$(CONFIG_SND_VMASTER) += vmaster.o
 snd-$(CONFIG_SND_JACK)	  += ctljack.o jack.o

sound/isa/Kconfig

@@ -22,7 +22,7 @@ config SND_SB16_DSP
 menuconfig SND_ISA
 	bool "ISA sound devices"
 	depends on ISA || COMPILE_TEST
-	depends on ISA_DMA_API && !M68K
+	depends on ISA_DMA_API
 	default y
 	help
 	  Support for sound devices connected via the ISA bus.