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path: root/drivers/spi/spi-nuc900.c
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Diffstat (limited to 'drivers/spi/spi-nuc900.c')
-rw-r--r--drivers/spi/spi-nuc900.c30
1 files changed, 13 insertions, 17 deletions
diff --git a/drivers/spi/spi-nuc900.c b/drivers/spi/spi-nuc900.c
index 50406306bc20..16e30de650b0 100644
--- a/drivers/spi/spi-nuc900.c
+++ b/drivers/spi/spi-nuc900.c
@@ -9,7 +9,6 @@
*/
#include <linux/module.h>
-#include <linux/init.h>
#include <linux/spinlock.h>
#include <linux/workqueue.h>
#include <linux/interrupt.h>
@@ -38,7 +37,9 @@
/* usi register bit */
#define ENINT (0x01 << 17)
#define ENFLG (0x01 << 16)
+#define SLEEP (0x0f << 12)
#define TXNUM (0x03 << 8)
+#define TXBITLEN (0x1f << 3)
#define TXNEG (0x01 << 2)
#define RXNEG (0x01 << 1)
#define LSB (0x01 << 10)
@@ -58,11 +59,8 @@ struct nuc900_spi {
unsigned char *rx;
struct clk *clk;
struct spi_master *master;
- struct spi_device *curdev;
- struct device *dev;
struct nuc900_spi_info *pdata;
spinlock_t lock;
- struct resource *res;
};
static inline struct nuc900_spi *to_hw(struct spi_device *sdev)
@@ -119,19 +117,16 @@ static void nuc900_spi_chipsel(struct spi_device *spi, int value)
}
}
-static void nuc900_spi_setup_txnum(struct nuc900_spi *hw,
- unsigned int txnum)
+static void nuc900_spi_setup_txnum(struct nuc900_spi *hw, unsigned int txnum)
{
unsigned int val;
unsigned long flags;
spin_lock_irqsave(&hw->lock, flags);
- val = __raw_readl(hw->regs + USI_CNT);
+ val = __raw_readl(hw->regs + USI_CNT) & ~TXNUM;
- if (!txnum)
- val &= ~TXNUM;
- else
+ if (txnum)
val |= txnum << 0x08;
__raw_writel(val, hw->regs + USI_CNT);
@@ -148,7 +143,7 @@ static void nuc900_spi_setup_txbitlen(struct nuc900_spi *hw,
spin_lock_irqsave(&hw->lock, flags);
- val = __raw_readl(hw->regs + USI_CNT);
+ val = __raw_readl(hw->regs + USI_CNT) & ~TXBITLEN;
val |= (txbitlen << 0x03);
@@ -287,12 +282,11 @@ static void nuc900_set_sleep(struct nuc900_spi *hw, unsigned int sleep)
spin_lock_irqsave(&hw->lock, flags);
- val = __raw_readl(hw->regs + USI_CNT);
+ val = __raw_readl(hw->regs + USI_CNT) & ~SLEEP;
if (sleep)
val |= (sleep << 12);
- else
- val &= ~(0x0f << 12);
+
__raw_writel(val, hw->regs + USI_CNT);
spin_unlock_irqrestore(&hw->lock, flags);
@@ -338,6 +332,7 @@ static int nuc900_spi_probe(struct platform_device *pdev)
{
struct nuc900_spi *hw;
struct spi_master *master;
+ struct resource *res;
int err = 0;
master = spi_alloc_master(&pdev->dev, sizeof(struct nuc900_spi));
@@ -349,7 +344,6 @@ static int nuc900_spi_probe(struct platform_device *pdev)
hw = spi_master_get_devdata(master);
hw->master = master;
hw->pdata = dev_get_platdata(&pdev->dev);
- hw->dev = &pdev->dev;
if (hw->pdata == NULL) {
dev_err(&pdev->dev, "No platform data supplied\n");
@@ -361,14 +355,16 @@ static int nuc900_spi_probe(struct platform_device *pdev)
init_completion(&hw->done);
master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH;
+ if (hw->pdata->lsb)
+ master->mode_bits |= SPI_LSB_FIRST;
master->num_chipselect = hw->pdata->num_cs;
master->bus_num = hw->pdata->bus_num;
hw->bitbang.master = hw->master;
hw->bitbang.chipselect = nuc900_spi_chipsel;
hw->bitbang.txrx_bufs = nuc900_spi_txrx;
- hw->res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- hw->regs = devm_ioremap_resource(&pdev->dev, hw->res);
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ hw->regs = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(hw->regs)) {
err = PTR_ERR(hw->regs);
goto err_pdata;