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Commit 39177519 authored by lionel.debieve@st.com's avatar lionel.debieve@st.com Committed by Herbert Xu
Browse files

crypto: stm32 - CRC use relaxed function 



In case of arm soc support, readl and writel will
be optimized using relaxed functions

Signed-off-by: default avatarLionel Debieve <lionel.debieve@st.com>
Reviewed-by: default avatarFabien Dessenne <fabien.dessenne@st.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 430f1338

drivers/crypto/stm32/stm32_crc32.c

+8 −7
Original line number Diff line number Diff line
@@ -107,12 +107,12 @@ static int stm32_crc_init(struct shash_desc *desc) 
	spin_unlock_bh(&crc_list.lock);



	/* Reset, set key, poly and configure in bit reverse mode */

	writel(bitrev32(mctx->key), ctx->crc->regs + CRC_INIT);

	writel(bitrev32(mctx->poly), ctx->crc->regs + CRC_POL);

	writel(CRC_CR_RESET | CRC_CR_REVERSE, ctx->crc->regs + CRC_CR);

	writel_relaxed(bitrev32(mctx->key), ctx->crc->regs + CRC_INIT);

	writel_relaxed(bitrev32(mctx->poly), ctx->crc->regs + CRC_POL);

	writel_relaxed(CRC_CR_RESET | CRC_CR_REVERSE, ctx->crc->regs + CRC_CR);



	/* Store partial result */

	ctx->partial = readl(ctx->crc->regs + CRC_DR);

	ctx->partial = readl_relaxed(ctx->crc->regs + CRC_DR);

	ctx->crc->nb_pending_bytes = 0;



	return 0;
@@ -135,7 +135,8 @@ static int stm32_crc_update(struct shash_desc *desc, const u8 *d8, 


		if (crc->nb_pending_bytes == sizeof(u32)) {

			/* Process completed pending data */

			writel(*(u32 *)crc->pending_data, crc->regs + CRC_DR);

			writel_relaxed(*(u32 *)crc->pending_data,

				       crc->regs + CRC_DR);

			crc->nb_pending_bytes = 0;

		}

	}
@@ -143,10 +144,10 @@ static int stm32_crc_update(struct shash_desc *desc, const u8 *d8, 
	d32 = (u32 *)d8;

	for (i = 0; i < length >> 2; i++)

		/* Process 32 bits data */

		writel(*(d32++), crc->regs + CRC_DR);

		writel_relaxed(*(d32++), crc->regs + CRC_DR);



	/* Store partial result */

	ctx->partial = readl(crc->regs + CRC_DR);

	ctx->partial = readl_relaxed(crc->regs + CRC_DR);



	/* Check for pending data (non 32 bits) */

	length &= 3;