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Date: Fri, 22 Sep 2017 12:46:41 +0900 From: Masahiro Yamada <yamada.masahiro@...ionext.com> To: linux-mtd@...ts.infradead.org Cc: Masahiro Yamada <yamada.masahiro@...ionext.com>, Cyrille Pitchen <cyrille.pitchen@...ev4u.fr>, linux-kernel@...r.kernel.org, Boris Brezillon <boris.brezillon@...e-electrons.com>, Marek Vasut <marek.vasut@...il.com>, Brian Norris <computersforpeace@...il.com>, Richard Weinberger <richard@....at>, David Woodhouse <dwmw2@...radead.org> Subject: [PATCH v2 04/12] mtd: nand: denali: squash denali_enable_dma() helper into caller This helper just sets/clears a flag of DMA_ENABLE register (with register read-back, I do not know why it is necessary). Move the register write code to the caller, and remove the helper. It works for me without the register read-back. Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com> --- Changes in v2: None drivers/mtd/nand/denali.c | 12 +++--------- 1 file changed, 3 insertions(+), 9 deletions(-) diff --git a/drivers/mtd/nand/denali.c b/drivers/mtd/nand/denali.c index 4daeb7f..e7b25de 100644 --- a/drivers/mtd/nand/denali.c +++ b/drivers/mtd/nand/denali.c @@ -465,13 +465,6 @@ static int denali_sw_ecc_fixup(struct mtd_info *mtd, return max_bitflips; } -/* programs the controller to either enable/disable DMA transfers */ -static void denali_enable_dma(struct denali_nand_info *denali, bool en) -{ - iowrite32(en ? DMA_ENABLE__FLAG : 0, denali->reg + DMA_ENABLE); - ioread32(denali->reg + DMA_ENABLE); -} - static void denali_setup_dma64(struct denali_nand_info *denali, dma_addr_t dma_addr, int page, int write) { @@ -619,7 +612,7 @@ static int denali_dma_xfer(struct denali_nand_info *denali, void *buf, ecc_err_mask = INTR__ECC_ERR; } - denali_enable_dma(denali, true); + iowrite32(DMA_ENABLE__FLAG, denali->reg + DMA_ENABLE); denali_reset_irq(denali); denali_setup_dma(denali, dma_addr, page, write); @@ -631,7 +624,8 @@ static int denali_dma_xfer(struct denali_nand_info *denali, void *buf, else if (irq_status & ecc_err_mask) ret = -EBADMSG; - denali_enable_dma(denali, false); + iowrite32(0, denali->reg + DMA_ENABLE); + dma_unmap_single(denali->dev, dma_addr, size, dir); if (irq_status & INTR__ERASED_PAGE) -- 2.7.4
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