Applied "spi: fsl-espi: remove unused linearization code" to the spi tree

[Mark Brown <broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>]

The patch

   spi: fsl-espi: remove unused linearization code

has been applied to the spi tree at

   git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From d54ef0574ade2eab4d203687d53ed20351e323ab Mon Sep 17 00:00:00 2001
From: Heiner Kallweit <hkallweit1-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Date: Sat, 26 Nov 2016 00:00:28 +0100
Subject: [PATCH] spi: fsl-espi: remove unused linearization code

After introducing direct transfers between hardware and transfer
buffers remove all code which is unused now.

This includes getting rid of the 64k linearization buffer.

Signed-off-by: Heiner Kallweit <hkallweit1-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Signed-off-by: Mark Brown <broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
---
 drivers/spi/spi-fsl-espi.c | 80 ----------------------------------------------
 1 file changed, 80 deletions(-)

diff --git a/drivers/spi/spi-fsl-espi.c b/drivers/spi/spi-fsl-espi.c
index e93892dca90a..cd2832940092 100644
--- a/drivers/spi/spi-fsl-espi.c
+++ b/drivers/spi/spi-fsl-espi.c
@@ -95,9 +95,6 @@ struct fsl_espi {
 	struct device *dev;
 	void __iomem *reg_base;
 
-	const void *tx;
-	void *rx;
-
 	struct list_head *m_transfers;
 	struct spi_transfer *tx_t;
 	unsigned int tx_pos;
@@ -107,11 +104,8 @@ struct fsl_espi {
 	bool rx_done;
 
 	bool swab;
-	unsigned int rx_len;
-	unsigned int tx_len;
 	unsigned int rxskip;
 
-	u8 *local_buf;
 	spinlock_t lock;
 
 	u32 spibrg;             /* SPIBRG input clock */
@@ -156,61 +150,6 @@ static inline void fsl_espi_write_reg8(struct fsl_espi *espi, int offset,
 	iowrite8(val, espi->reg_base + offset);
 }
 
-static void fsl_espi_memcpy_swab(void *to, const void *from,
-				 struct spi_message *m,
-				 struct spi_transfer *t)
-{
-	struct fsl_espi *espi = spi_master_get_devdata(m->spi->master);
-	unsigned int len = t->len;
-
-	if (!espi->swab) {
-		memcpy(to, from, len);
-		return;
-	}
-
-	while (len)
-		if (len >= 4) {
-			*(u32 *)to = swahb32p(from);
-			to += 4;
-			from += 4;
-			len -= 4;
-		} else {
-			*(u16 *)to = swab16p(from);
-			to += 2;
-			from += 2;
-			len -= 2;
-		}
-}
-
-static void fsl_espi_copy_to_buf(struct spi_message *m,
-				 struct fsl_espi *espi)
-{
-	struct spi_transfer *t;
-	u8 *buf = espi->local_buf;
-
-	list_for_each_entry(t, &m->transfers, transfer_list) {
-		if (t->tx_buf)
-			fsl_espi_memcpy_swab(buf, t->tx_buf, m, t);
-		/* In RXSKIP mode controller shifts out zeros internally */
-		else if (!espi->rxskip)
-			memset(buf, 0, t->len);
-		buf += t->len;
-	}
-}
-
-static void fsl_espi_copy_from_buf(struct spi_message *m,
-				   struct fsl_espi *espi)
-{
-	struct spi_transfer *t;
-	u8 *buf = espi->local_buf;
-
-	list_for_each_entry(t, &m->transfers, transfer_list) {
-		if (t->rx_buf)
-			fsl_espi_memcpy_swab(t->rx_buf, buf, m, t);
-		buf += t->len;
-	}
-}
-
 static int fsl_espi_check_message(struct spi_message *m)
 {
 	struct fsl_espi *espi = spi_master_get_devdata(m->spi->master);
@@ -421,12 +360,6 @@ static int fsl_espi_bufs(struct spi_device *spi, struct spi_transfer *t)
 	u32 mask, spcom;
 	int ret;
 
-	espi->rx_len = t->len;
-	espi->tx_len = t->len;
-
-	espi->tx = t->tx_buf;
-	espi->rx = t->rx_buf;
-
 	reinit_completion(&espi->done);
 
 	/* Set SPCOM[CS] and SPCOM[TRANLEN] field */
@@ -436,10 +369,7 @@ static int fsl_espi_bufs(struct spi_device *spi, struct spi_transfer *t)
 	/* configure RXSKIP mode */
 	if (espi->rxskip) {
 		spcom |= SPCOM_RXSKIP(espi->rxskip);
-		espi->tx_len = espi->rxskip;
-		espi->rx_len = t->len - espi->rxskip;
 		rx_len = t->len - espi->rxskip;
-		espi->rx = t->rx_buf + espi->rxskip;
 		if (t->rx_nbits == SPI_NBITS_DUAL)
 			spcom |= SPCOM_DO;
 	}
@@ -497,7 +427,6 @@ static int fsl_espi_trans(struct spi_message *m, struct spi_transfer *trans)
 	if (espi->rxskip)
 		espi->rx_t = list_next_entry(espi->rx_t, transfer_list);
 
-	fsl_espi_copy_to_buf(m, espi);
 	fsl_espi_setup_transfer(spi, trans);
 
 	ret = fsl_espi_bufs(spi, trans);
@@ -511,7 +440,6 @@ static int fsl_espi_trans(struct spi_message *m, struct spi_transfer *trans)
 static int fsl_espi_do_one_msg(struct spi_master *master,
 			       struct spi_message *m)
 {
-	struct fsl_espi *espi = spi_master_get_devdata(m->spi->master);
 	unsigned int delay_usecs = 0, rx_nbits = 0;
 	struct spi_transfer *t, trans = {};
 	int ret;
@@ -534,8 +462,6 @@ static int fsl_espi_do_one_msg(struct spi_master *master,
 	trans.speed_hz = t->speed_hz;
 	trans.bits_per_word = t->bits_per_word;
 	trans.delay_usecs = delay_usecs;
-	trans.tx_buf = espi->local_buf;
-	trans.rx_buf = espi->local_buf;
 	trans.rx_nbits = rx_nbits;
 
 	if (trans.len)
@@ -773,12 +699,6 @@ static int fsl_espi_probe(struct device *dev, struct resource *mem,
 
 	init_completion(&espi->done);
 
-	espi->local_buf = devm_kmalloc(dev, SPCOM_TRANLEN_MAX, GFP_KERNEL);
-	if (!espi->local_buf) {
-		ret = -ENOMEM;
-		goto err_probe;
-	}
-
 	espi->reg_base = devm_ioremap_resource(dev, mem);
 	if (IS_ERR(espi->reg_base)) {
 		ret = PTR_ERR(espi->reg_base);
-- 
2.10.2

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