spi_mpc83xx: handle other Freescale processors

[safe/jmp/linux-2.6] / drivers / spi / spi_bitbang.c

diff --git a/drivers/spi/spi_bitbang.c b/drivers/spi/spi_bitbang.c
index 0c85c98..2a5abc0 100644 (file)
--- a/drivers/spi/spi_bitbang.c
+++ b/drivers/spi/spi_bitbang.c
@@ -184,15 +184,10 @@ int spi_bitbang_setup(struct spi_device *spi)
        struct spi_bitbang_cs   *cs = spi->controller_state;
        struct spi_bitbang      *bitbang;
        int                     retval;
+       unsigned long           flags;
 
        bitbang = spi_master_get_devdata(spi->master);
 
-       /* Bitbangers can support SPI_CS_HIGH, SPI_3WIRE, and so on;
-        * add those to master->flags, and provide the other support.
-        */
-       if ((spi->mode & ~(SPI_CPOL|SPI_CPHA|bitbang->flags)) != 0)
-               return -EINVAL;
-
        if (!cs) {
                cs = kzalloc(sizeof *cs, GFP_KERNEL);
                if (!cs)
@@ -200,9 +195,6 @@ int spi_bitbang_setup(struct spi_device *spi)
                spi->controller_state = cs;
        }
 
-       if (!spi->bits_per_word)
-               spi->bits_per_word = 8;
-
        /* per-word shift register access, in hardware or bitbanging */
        cs->txrx_word = bitbang->txrx_word[spi->mode & (SPI_CPOL|SPI_CPHA)];
        if (!cs->txrx_word)
@@ -212,9 +204,7 @@ int spi_bitbang_setup(struct spi_device *spi)
        if (retval < 0)
                return retval;
 
-       dev_dbg(&spi->dev, "%s, mode %d, %u bits/w, %u nsec/bit\n",
-                       __FUNCTION__, spi->mode & (SPI_CPOL | SPI_CPHA),
-                       spi->bits_per_word, 2 * cs->nsecs);
+       dev_dbg(&spi->dev, "%s, %u nsec/bit\n", __func__, 2 * cs->nsecs);
 
        /* NOTE we _need_ to call chipselect() early, ideally with adapter
         * setup, unless the hardware defaults cooperate to avoid confusion
@@ -222,12 +212,12 @@ int spi_bitbang_setup(struct spi_device *spi)
         */
 
        /* deselect chip (low or high) */
-       spin_lock(&bitbang->lock);
+       spin_lock_irqsave(&bitbang->lock, flags);
        if (!bitbang->busy) {
                bitbang->chipselect(spi, BITBANG_CS_INACTIVE);
                ndelay(cs->nsecs);
        }
-       spin_unlock(&bitbang->lock);
+       spin_unlock_irqrestore(&bitbang->lock, flags);
 
        return 0;
 }
@@ -343,12 +333,14 @@ static void bitbang_work(struct work_struct *work)
                                        t->rx_dma = t->tx_dma = 0;
                                status = bitbang->txrx_bufs(spi, t);
                        }
+                       if (status > 0)
+                               m->actual_length += status;
                        if (status != t->len) {
-                               if (status > 0)
-                                       status = -EMSGSIZE;
+                               /* always report some kind of error */
+                               if (status >= 0)
+                                       status = -EREMOTEIO;
                                break;
                        }
-                       m->actual_length += status;
                        status = 0;
 
                        /* protocol tweaks before next transfer */
@@ -454,6 +446,9 @@ int spi_bitbang_start(struct spi_bitbang *bitbang)
        spin_lock_init(&bitbang->lock);
        INIT_LIST_HEAD(&bitbang->queue);
 
+       if (!bitbang->master->mode_bits)
+               bitbang->master->mode_bits = SPI_CPOL | SPI_CPHA | bitbang->flags;
+
        if (!bitbang->master->transfer)
                bitbang->master->transfer = spi_bitbang_transfer;
        if (!bitbang->txrx_bufs) {
@@ -472,7 +467,7 @@ int spi_bitbang_start(struct spi_bitbang *bitbang)
        /* this task is the only thing to touch the SPI bits */
        bitbang->busy = 0;
        bitbang->workqueue = create_singlethread_workqueue(
-                       bitbang->master->cdev.dev->bus_id);
+                       dev_name(bitbang->master->dev.parent));
        if (bitbang->workqueue == NULL) {
                status = -EBUSY;
                goto err1;