diff options
Diffstat (limited to 'drivers/spi/omap2_mcspi.c')
| -rw-r--r-- | drivers/spi/omap2_mcspi.c | 50 |
1 files changed, 42 insertions, 8 deletions
diff --git a/drivers/spi/omap2_mcspi.c b/drivers/spi/omap2_mcspi.c index 2a651e61bfb..abb1ffbf3d2 100644 --- 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), }; |