spi_mpc8xxx: Turn qe_mode into flags

Soon there will be more flags introduced in subsequent patches, so
let's turn qe_mode into flags.

Also introduce mpc8xxx_spi_strmode() and print current SPI mode.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

2 files changed, 20 insertions, 12 deletions

diff --git a/drivers/spi/spi_mpc8xxx.c b/drivers/spi/spi_mpc8xxx.c
index 4b119eaf4e6b..80374dfa9708 100644
--- a/drivers/spi/spi_mpc8xxx.c
+++ b/drivers/spi/spi_mpc8xxx.c
@@ -96,7 +96,8 @@ struct mpc8xxx_spi {
         u32 rx_shift;           /* RX data reg shift when in qe mode */
         u32 tx_shift;           /* TX data reg shift when in qe mode */
 
-        bool qe_mode;
+        unsigned int flags;
+#define SPI_QE_CPU_MODE         (1 << 0) /* QE CPU ("PIO") mode */
 
         struct workqueue_struct *workqueue;
         struct work_struct work;
@@ -235,14 +236,14 @@ int mpc8xxx_spi_setup_transfer(struct spi_device *spi, struct spi_transfer *t)
         if (bits_per_word <= 8) {
                 cs->get_rx = mpc8xxx_spi_rx_buf_u8;
                 cs->get_tx = mpc8xxx_spi_tx_buf_u8;
-                if (mpc8xxx_spi->qe_mode) {
+                if (mpc8xxx_spi->flags & SPI_QE_CPU_MODE) {
                         cs->rx_shift = 16;
                         cs->tx_shift = 24;
                 }
         } else if (bits_per_word <= 16) {
                 cs->get_rx = mpc8xxx_spi_rx_buf_u16;
                 cs->get_tx = mpc8xxx_spi_tx_buf_u16;
-                if (mpc8xxx_spi->qe_mode) {
+                if (mpc8xxx_spi->flags & SPI_QE_CPU_MODE) {
                         cs->rx_shift = 16;
                         cs->tx_shift = 16;
                 }
@@ -252,7 +253,8 @@ int mpc8xxx_spi_setup_transfer(struct spi_device *spi, struct spi_transfer *t)
         } else
                 return -EINVAL;
 
-        if (mpc8xxx_spi->qe_mode && spi->mode & SPI_LSB_FIRST) {
+        if (mpc8xxx_spi->flags & SPI_QE_CPU_MODE &&
+                        spi->mode & SPI_LSB_FIRST) {
                 cs->tx_shift = 0;
                 if (bits_per_word <= 8)
                         cs->rx_shift = 8;
@@ -518,6 +520,13 @@ static void mpc8xxx_spi_cleanup(struct spi_device *spi)
         kfree(spi->controller_state);
 }
 
+static const char *mpc8xxx_spi_strmode(unsigned int flags)
+{
+        if (flags & SPI_QE_CPU_MODE)
+                return "QE CPU";
+        return "CPU";
+}
+
 static struct spi_master * __devinit
 mpc8xxx_spi_probe(struct device *dev, struct resource *mem, unsigned int irq)
 {
@@ -544,14 +553,14 @@ mpc8xxx_spi_probe(struct device *dev, struct resource *mem, unsigned int irq)
         master->cleanup = mpc8xxx_spi_cleanup;
 
         mpc8xxx_spi = spi_master_get_devdata(master);
-        mpc8xxx_spi->qe_mode = pdata->qe_mode;
         mpc8xxx_spi->get_rx = mpc8xxx_spi_rx_buf_u8;
         mpc8xxx_spi->get_tx = mpc8xxx_spi_tx_buf_u8;
+        mpc8xxx_spi->flags = pdata->flags;
         mpc8xxx_spi->spibrg = pdata->sysclk;
 
         mpc8xxx_spi->rx_shift = 0;
         mpc8xxx_spi->tx_shift = 0;
-        if (mpc8xxx_spi->qe_mode) {
+        if (mpc8xxx_spi->flags & SPI_QE_CPU_MODE) {
                 mpc8xxx_spi->rx_shift = 16;
                 mpc8xxx_spi->tx_shift = 24;
         }
@@ -584,7 +593,7 @@ mpc8xxx_spi_probe(struct device *dev, struct resource *mem, unsigned int irq)
 
         /* Enable SPI interface */
         regval = pdata->initial_spmode | SPMODE_INIT_VAL | SPMODE_ENABLE;
-        if (pdata->qe_mode)
+        if (mpc8xxx_spi->flags & SPI_QE_CPU_MODE)
                 regval |= SPMODE_OP;
 
         mpc8xxx_spi_write_reg(&mpc8xxx_spi->base->mode, regval);
@@ -604,9 +613,8 @@ mpc8xxx_spi_probe(struct device *dev, struct resource *mem, unsigned int irq)
         if (ret < 0)
                 goto unreg_master;
 
-        printk(KERN_INFO
-               "%s: MPC8xxx SPI Controller driver at 0x%p (irq = %d)\n",
-               dev_name(dev), mpc8xxx_spi->base, mpc8xxx_spi->irq);
+        dev_info(dev, "at 0x%p (irq = %d), %s mode\n", mpc8xxx_spi->base,
+                 mpc8xxx_spi->irq, mpc8xxx_spi_strmode(mpc8xxx_spi->flags));
 
         return master;
 
@@ -797,7 +805,7 @@ static int __devinit of_mpc8xxx_spi_probe(struct of_device *ofdev,
 
         prop = of_get_property(np, "mode", NULL);
         if (prop && !strcmp(prop, "cpu-qe"))
-                pdata->qe_mode = 1;
+                pdata->flags = SPI_QE_CPU_MODE;
 
         ret = of_mpc8xxx_spi_get_chipselects(dev);
         if (ret)
diff --git a/include/linux/fsl_devices.h b/include/linux/fsl_devices.h
index 43fc95d822d5..39fd94681e74 100644
--- a/include/linux/fsl_devices.h
+++ b/include/linux/fsl_devices.h
@@ -74,7 +74,7 @@ struct spi_device;
 struct fsl_spi_platform_data {
         u32     initial_spmode; /* initial SPMODE value */
         s16     bus_num;
-        bool    qe_mode;
+        unsigned int flags;
         /* board specific information */
         u16     max_chipselect;
         void    (*cs_control)(struct spi_device *spi, bool on);