Merge branch 'next-spi' of git://git.secretlab.ca/git/linux-2.6

[cascardo/linux.git] / drivers / spi / omap2_mcspi.c

diff --git a/drivers/spi/omap2_mcspi.c b/drivers/spi/omap2_mcspi.c
index 2a651e6..abb1ffb 100644 (file)
--- a/drivers/spi/omap2_mcspi.c
+++ b/drivers/spi/omap2_mcspi.c
@@ -397,7 +397,7 @@ omap2_mcspi_txrx_dma(struct spi_device *spi, struct spi_transfer *xfer)
 
        if (tx != NULL) {
                wait_for_completion(&mcspi_dma->dma_tx_completion);
-               dma_unmap_single(NULL, xfer->tx_dma, count, DMA_TO_DEVICE);
+               dma_unmap_single(&spi->dev, xfer->tx_dma, count, DMA_TO_DEVICE);
 
                /* for TX_ONLY mode, be sure all words have shifted out */
                if (rx == NULL) {
@@ -412,7 +412,7 @@ omap2_mcspi_txrx_dma(struct spi_device *spi, struct spi_transfer *xfer)
 
        if (rx != NULL) {
                wait_for_completion(&mcspi_dma->dma_rx_completion);
-               dma_unmap_single(NULL, xfer->rx_dma, count, DMA_FROM_DEVICE);
+               dma_unmap_single(&spi->dev, xfer->rx_dma, count, DMA_FROM_DEVICE);
                omap2_mcspi_set_enable(spi, 0);
 
                if (l & OMAP2_MCSPI_CHCONF_TURBO) {
@@ -1025,11 +1025,6 @@ static int omap2_mcspi_transfer(struct spi_device *spi, struct spi_message *m)
                if (m->is_dma_mapped || len < DMA_MIN_BYTES)
                        continue;
 
-               /* Do DMA mapping "early" for better error reporting and
-                * dcache use.  Note that if dma_unmap_single() ever starts
-                * to do real work on ARM, we'd need to clean up mappings
-                * for previous transfers on *ALL* exits of this loop...
-                */
                if (tx_buf != NULL) {
                        t->tx_dma = dma_map_single(&spi->dev, (void *) tx_buf,
                                        len, DMA_TO_DEVICE);
@@ -1046,7 +1041,7 @@ static int omap2_mcspi_transfer(struct spi_device *spi, struct spi_message *m)
                                dev_dbg(&spi->dev, "dma %cX %d bytes error\n",
                                                'R', len);
                                if (tx_buf != NULL)
-                                       dma_unmap_single(NULL, t->tx_dma,
+                                       dma_unmap_single(&spi->dev, t->tx_dma,
                                                        len, DMA_TO_DEVICE);
                                return -EINVAL;
                        }
@@ -1305,10 +1300,49 @@ static int __exit omap2_mcspi_remove(struct platform_device *pdev)
 /* work with hotplug and coldplug */
 MODULE_ALIAS("platform:omap2_mcspi");
 
+#ifdef CONFIG_SUSPEND
+/*
+ * When SPI wake up from off-mode, CS is in activate state. If it was in
+ * unactive state when driver was suspend, then force it to unactive state at
+ * wake up.
+ */
+static int omap2_mcspi_resume(struct device *dev)
+{
+       struct spi_master       *master = dev_get_drvdata(dev);
+       struct omap2_mcspi      *mcspi = spi_master_get_devdata(master);
+       struct omap2_mcspi_cs *cs;
+
+       omap2_mcspi_enable_clocks(mcspi);
+       list_for_each_entry(cs, &omap2_mcspi_ctx[master->bus_num - 1].cs,
+                           node) {
+               if ((cs->chconf0 & OMAP2_MCSPI_CHCONF_FORCE) == 0) {
+
+                       /*
+                        * We need to toggle CS state for OMAP take this
+                        * change in account.
+                        */
+                       MOD_REG_BIT(cs->chconf0, OMAP2_MCSPI_CHCONF_FORCE, 1);
+                       __raw_writel(cs->chconf0, cs->base + OMAP2_MCSPI_CHCONF0);
+                       MOD_REG_BIT(cs->chconf0, OMAP2_MCSPI_CHCONF_FORCE, 0);
+                       __raw_writel(cs->chconf0, cs->base + OMAP2_MCSPI_CHCONF0);
+               }
+       }
+       omap2_mcspi_disable_clocks(mcspi);
+       return 0;
+}
+#else
+#define        omap2_mcspi_resume      NULL
+#endif
+
+static const struct dev_pm_ops omap2_mcspi_pm_ops = {
+       .resume = omap2_mcspi_resume,
+};
+
 static struct platform_driver omap2_mcspi_driver = {
        .driver = {
                .name =         "omap2_mcspi",
                .owner =        THIS_MODULE,
+               .pm =           &omap2_mcspi_pm_ops
        },
        .remove =       __exit_p(omap2_mcspi_remove),
 };