[PATCH v3 1/7] spi: spi-ep93xx: remove io wrappers

[Chris Packham]

From: H Hartley Sweeten <hsweeten@xxxxxxxxxxxxxxxxxxx>

The io wrappers just add obfuscation to the driver. Remove them.

Signed-off-by: H Hartley Sweeten <hsweeten@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Chris Packham <chris.packham@xxxxxxxxxxxxxxxxxxx>
---
 drivers/spi/spi-ep93xx.c | 72 +++++++++++++++++-------------------------------
 1 file changed, 25 insertions(+), 47 deletions(-)

diff --git a/drivers/spi/spi-ep93xx.c b/drivers/spi/spi-ep93xx.c
index b5d766064b7b..49c42a6c2be1 100644
--- a/drivers/spi/spi-ep93xx.c
+++ b/drivers/spi/spi-ep93xx.c
@@ -72,7 +72,7 @@
  * struct ep93xx_spi - EP93xx SPI controller structure
  * @pdev: pointer to platform device
  * @clk: clock for the controller
- * @regs_base: pointer to ioremap()'d registers
+ * @mmio: pointer to ioremap()'d registers
  * @sspdr_phys: physical address of the SSPDR register
  * @wait: wait here until given transfer is completed
  * @current_msg: message that is currently processed (or %NULL if none)
@@ -92,7 +92,7 @@
 struct ep93xx_spi {
 	const struct platform_device	*pdev;
 	struct clk			*clk;
-	void __iomem			*regs_base;
+	void __iomem			*mmio;
 	unsigned long			sspdr_phys;
 	struct completion		wait;
 	struct spi_message		*current_msg;
@@ -111,28 +111,6 @@ struct ep93xx_spi {
 /* converts bits per word to CR0.DSS value */
 #define bits_per_word_to_dss(bpw)	((bpw) - 1)
 
-static void ep93xx_spi_write_u8(const struct ep93xx_spi *espi,
-				u16 reg, u8 value)
-{
-	writeb(value, espi->regs_base + reg);
-}
-
-static u8 ep93xx_spi_read_u8(const struct ep93xx_spi *spi, u16 reg)
-{
-	return readb(spi->regs_base + reg);
-}
-
-static void ep93xx_spi_write_u16(const struct ep93xx_spi *espi,
-				 u16 reg, u16 value)
-{
-	writew(value, espi->regs_base + reg);
-}
-
-static u16 ep93xx_spi_read_u16(const struct ep93xx_spi *spi, u16 reg)
-{
-	return readw(spi->regs_base + reg);
-}
-
 static int ep93xx_spi_enable(const struct ep93xx_spi *espi)
 {
 	u8 regval;
@@ -142,9 +120,9 @@ static int ep93xx_spi_enable(const struct ep93xx_spi *espi)
 	if (err)
 		return err;
 
-	regval = ep93xx_spi_read_u8(espi, SSPCR1);
+	regval = readb(espi->mmio + SSPCR1);
 	regval |= SSPCR1_SSE;
-	ep93xx_spi_write_u8(espi, SSPCR1, regval);
+	writeb(regval, espi->mmio + SSPCR1);
 
 	return 0;
 }
@@ -153,9 +131,9 @@ static void ep93xx_spi_disable(const struct ep93xx_spi *espi)
 {
 	u8 regval;
 
-	regval = ep93xx_spi_read_u8(espi, SSPCR1);
+	regval = readb(espi->mmio + SSPCR1);
 	regval &= ~SSPCR1_SSE;
-	ep93xx_spi_write_u8(espi, SSPCR1, regval);
+	writeb(regval, espi->mmio + SSPCR1);
 
 	clk_disable(espi->clk);
 }
@@ -164,18 +142,18 @@ static void ep93xx_spi_enable_interrupts(const struct ep93xx_spi *espi)
 {
 	u8 regval;
 
-	regval = ep93xx_spi_read_u8(espi, SSPCR1);
+	regval = readb(espi->mmio + SSPCR1);
 	regval |= (SSPCR1_RORIE | SSPCR1_TIE | SSPCR1_RIE);
-	ep93xx_spi_write_u8(espi, SSPCR1, regval);
+	writeb(regval, espi->mmio + SSPCR1);
 }
 
 static void ep93xx_spi_disable_interrupts(const struct ep93xx_spi *espi)
 {
 	u8 regval;
 
-	regval = ep93xx_spi_read_u8(espi, SSPCR1);
+	regval = readb(espi->mmio + SSPCR1);
 	regval &= ~(SSPCR1_RORIE | SSPCR1_TIE | SSPCR1_RIE);
-	ep93xx_spi_write_u8(espi, SSPCR1, regval);
+	writeb(regval, espi->mmio + SSPCR1);
 }
 
 /**
@@ -252,8 +230,8 @@ static int ep93xx_spi_chip_setup(const struct ep93xx_spi *espi,
 		spi->mode, div_cpsr, div_scr, dss);
 	dev_dbg(&espi->pdev->dev, "setup: cr0 %#x\n", cr0);
 
-	ep93xx_spi_write_u8(espi, SSPCPSR, div_cpsr);
-	ep93xx_spi_write_u16(espi, SSPCR0, cr0);
+	writeb(div_cpsr, espi->mmio + SSPCPSR);
+	writew(cr0, espi->mmio + SSPCR0);
 
 	return 0;
 }
@@ -265,14 +243,14 @@ static void ep93xx_do_write(struct ep93xx_spi *espi, struct spi_transfer *t)
 
 		if (t->tx_buf)
 			tx_val = ((u16 *)t->tx_buf)[espi->tx];
-		ep93xx_spi_write_u16(espi, SSPDR, tx_val);
+		writew(tx_val, espi->mmio + SSPDR);
 		espi->tx += sizeof(tx_val);
 	} else {
 		u8 tx_val = 0;
 
 		if (t->tx_buf)
 			tx_val = ((u8 *)t->tx_buf)[espi->tx];
-		ep93xx_spi_write_u8(espi, SSPDR, tx_val);
+		writeb(tx_val, espi->mmio + SSPDR);
 		espi->tx += sizeof(tx_val);
 	}
 }
@@ -282,14 +260,14 @@ static void ep93xx_do_read(struct ep93xx_spi *espi, struct spi_transfer *t)
 	if (t->bits_per_word > 8) {
 		u16 rx_val;
 
-		rx_val = ep93xx_spi_read_u16(espi, SSPDR);
+		rx_val = readw(espi->mmio + SSPDR);
 		if (t->rx_buf)
 			((u16 *)t->rx_buf)[espi->rx] = rx_val;
 		espi->rx += sizeof(rx_val);
 	} else {
 		u8 rx_val;
 
-		rx_val = ep93xx_spi_read_u8(espi, SSPDR);
+		rx_val = readb(espi->mmio + SSPDR);
 		if (t->rx_buf)
 			((u8 *)t->rx_buf)[espi->rx] = rx_val;
 		espi->rx += sizeof(rx_val);
@@ -313,7 +291,7 @@ static int ep93xx_spi_read_write(struct ep93xx_spi *espi)
 	struct spi_transfer *t = msg->state;
 
 	/* read as long as RX FIFO has frames in it */
-	while ((ep93xx_spi_read_u8(espi, SSPSR) & SSPSR_RNE)) {
+	while ((readb(espi->mmio + SSPSR) & SSPSR_RNE)) {
 		ep93xx_do_read(espi, t);
 		espi->fifo_level--;
 	}
@@ -615,14 +593,14 @@ static void ep93xx_spi_process_message(struct ep93xx_spi *espi,
 	 * Just to be sure: flush any data from RX FIFO.
 	 */
 	timeout = jiffies + msecs_to_jiffies(SPI_TIMEOUT);
-	while (ep93xx_spi_read_u16(espi, SSPSR) & SSPSR_RNE) {
+	while (readw(espi->mmio + SSPSR) & SSPSR_RNE) {
 		if (time_after(jiffies, timeout)) {
 			dev_warn(&espi->pdev->dev,
 				 "timeout while flushing RX FIFO\n");
 			msg->status = -ETIMEDOUT;
 			return;
 		}
-		ep93xx_spi_read_u16(espi, SSPDR);
+		readw(espi->mmio + SSPDR);
 	}
 
 	/*
@@ -671,7 +649,7 @@ static int ep93xx_spi_transfer_one_message(struct spi_master *master,
 static irqreturn_t ep93xx_spi_interrupt(int irq, void *dev_id)
 {
 	struct ep93xx_spi *espi = dev_id;
-	u8 irq_status = ep93xx_spi_read_u8(espi, SSPIIR);
+	u8 irq_status = readb(espi->mmio + SSPIIR);
 
 	/*
 	 * If we got ROR (receive overrun) interrupt we know that something is
@@ -679,7 +657,7 @@ static irqreturn_t ep93xx_spi_interrupt(int irq, void *dev_id)
 	 */
 	if (unlikely(irq_status & SSPIIR_RORIS)) {
 		/* clear the overrun interrupt */
-		ep93xx_spi_write_u8(espi, SSPICR, 0);
+		writeb(0, espi->mmio + SSPICR);
 		dev_warn(&espi->pdev->dev,
 			 "receive overrun, aborting the message\n");
 		espi->current_msg->status = -EIO;
@@ -862,9 +840,9 @@ static int ep93xx_spi_probe(struct platform_device *pdev)
 
 	espi->sspdr_phys = res->start + SSPDR;
 
-	espi->regs_base = devm_ioremap_resource(&pdev->dev, res);
-	if (IS_ERR(espi->regs_base)) {
-		error = PTR_ERR(espi->regs_base);
+	espi->mmio = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(espi->mmio)) {
+		error = PTR_ERR(espi->mmio);
 		goto fail_release_master;
 	}
 
@@ -879,7 +857,7 @@ static int ep93xx_spi_probe(struct platform_device *pdev)
 		dev_warn(&pdev->dev, "DMA setup failed. Falling back to PIO\n");
 
 	/* make sure that the hardware is disabled */
-	ep93xx_spi_write_u8(espi, SSPCR1, 0);
+	writeb(0, espi->mmio + SSPCR1);
 
 	error = devm_spi_register_master(&pdev->dev, master);
 	if (error) {
-- 
2.13.0