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Message-Id: <20170804000023.15624-2-chris.packham@alliedtelesis.co.nz>
Date: Fri, 4 Aug 2017 12:00:17 +1200
From: Chris Packham <chris.packham@...iedtelesis.co.nz>
To: broonie@...nel.org, linux-spi@...r.kernel.org,
linux-kernel@...r.kernel.org, andy.shevchenko@...il.com,
hsweeten@...ionengravers.com
Subject: [PATCH v2 1/7] spi: spi-ep93xx: remove io wrappers
From: H Hartley Sweeten <hsweeten@...ionengravers.com>
The io wrappers just add obfuscation to the driver. Remove them.
Signed-off-by: H Hartley Sweeten <hsweeten@...ionengravers.com>
---
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
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