dmaengine: sh: Remove R-Mobile APE6 support

Renesas R-Mobile APE6 support is currently unused:
  - DMA slaves were never enabled in r8a73a4.dtsi,
  - The driver relies on legacy filter matching and describing all
    slaves and MID/RIDs in a table, unlike modern DMA engine drivers for
    similar hardware like rcar-dmac,
  - The driver doesn't seem to work well.

Remove the driver, it can be resurrected from git history when needed.

As this was the last user of SH_DMAE_BASE on Renesas ARM SoCs, the
sh-dma-engine driver core is now used on SuperH only.

Note that the DT bindings are still present, as r8a73a4.dtsi uses them.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Ulrich Hecht <uli+renesas@fpond.eu>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Vinod Koul <vkoul@kernel.org>

1 files changed, 0 insertions, 74 deletions

diff --git a/drivers/dma/sh/shdma-r8a73a4.c b/drivers/dma/sh/shdma-r8a73a4.c
deleted file mode 100644
index ddc9a3578353..000000000000
--- a/drivers/dma/sh/shdma-r8a73a4.c
+++ /dev/null
@@ -1,74 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Renesas SuperH DMA Engine support for r8a73a4 (APE6) SoCs
- *
- * Copyright (C) 2013 Renesas Electronics, Inc.
- */
-#include <linux/sh_dma.h>
-
-#include "shdma-arm.h"
-
-static const unsigned int dma_ts_shift[] = SH_DMAE_TS_SHIFT;
-
-static const struct sh_dmae_slave_config dma_slaves[] = {
-	{
-		.chcr		= CHCR_TX(XMIT_SZ_32BIT),
-		.mid_rid	= 0xd1,		/* MMC0 Tx */
-	}, {
-		.chcr		= CHCR_RX(XMIT_SZ_32BIT),
-		.mid_rid	= 0xd2,		/* MMC0 Rx */
-	}, {
-		.chcr		= CHCR_TX(XMIT_SZ_32BIT),
-		.mid_rid	= 0xe1,		/* MMC1 Tx */
-	}, {
-		.chcr		= CHCR_RX(XMIT_SZ_32BIT),
-		.mid_rid	= 0xe2,		/* MMC1 Rx */
-	},
-};
-
-#define DMAE_CHANNEL(a, b)				\
-	{						\
-		.offset         = (a) - 0x20,		\
-		.dmars          = (a) - 0x20 + 0x40,	\
-		.chclr_bit	= (b),			\
-		.chclr_offset	= 0x80 - 0x20,		\
-	}
-
-static const struct sh_dmae_channel dma_channels[] = {
-	DMAE_CHANNEL(0x8000, 0),
-	DMAE_CHANNEL(0x8080, 1),
-	DMAE_CHANNEL(0x8100, 2),
-	DMAE_CHANNEL(0x8180, 3),
-	DMAE_CHANNEL(0x8200, 4),
-	DMAE_CHANNEL(0x8280, 5),
-	DMAE_CHANNEL(0x8300, 6),
-	DMAE_CHANNEL(0x8380, 7),
-	DMAE_CHANNEL(0x8400, 8),
-	DMAE_CHANNEL(0x8480, 9),
-	DMAE_CHANNEL(0x8500, 10),
-	DMAE_CHANNEL(0x8580, 11),
-	DMAE_CHANNEL(0x8600, 12),
-	DMAE_CHANNEL(0x8680, 13),
-	DMAE_CHANNEL(0x8700, 14),
-	DMAE_CHANNEL(0x8780, 15),
-	DMAE_CHANNEL(0x8800, 16),
-	DMAE_CHANNEL(0x8880, 17),
-	DMAE_CHANNEL(0x8900, 18),
-	DMAE_CHANNEL(0x8980, 19),
-};
-
-const struct sh_dmae_pdata r8a73a4_dma_pdata = {
-	.slave		= dma_slaves,
-	.slave_num	= ARRAY_SIZE(dma_slaves),
-	.channel	= dma_channels,
-	.channel_num	= ARRAY_SIZE(dma_channels),
-	.ts_low_shift	= TS_LOW_SHIFT,
-	.ts_low_mask	= TS_LOW_BIT << TS_LOW_SHIFT,
-	.ts_high_shift	= TS_HI_SHIFT,
-	.ts_high_mask	= TS_HI_BIT << TS_HI_SHIFT,
-	.ts_shift	= dma_ts_shift,
-	.ts_shift_num	= ARRAY_SIZE(dma_ts_shift),
-	.dmaor_init     = DMAOR_DME,
-	.chclr_present	= 1,
-	.chclr_bitwise	= 1,
-};