spi/pxa2xx: convert to dma_request_slave_channel_compat()

Now that we have these nice DMA API helper functions we can take advantage
of those instead of open-coding the channel/request line extraction from
ACPI. Use the _compat version which still allows passing the
channel/request line from platform data.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

2 files changed, 8 insertions, 37 deletions

diff --git a/drivers/spi/spi-pxa2xx-dma.c b/drivers/spi/spi-pxa2xx-dma.c
index c735c5a008a2..f4cb744bf23f 100644
--- a/drivers/spi/spi-pxa2xx-dma.c
+++ b/drivers/spi/spi-pxa2xx-dma.c
@@ -327,22 +327,23 @@ void pxa2xx_spi_dma_start(struct driver_data *drv_data)
 int pxa2xx_spi_dma_setup(struct driver_data *drv_data)
 {
         struct pxa2xx_spi_master *pdata = drv_data->master_info;
+        struct device *dev = &drv_data->pdev->dev;
         dma_cap_mask_t mask;
 
         dma_cap_zero(mask);
         dma_cap_set(DMA_SLAVE, mask);
 
-        drv_data->dummy = devm_kzalloc(&drv_data->pdev->dev, SZ_2K, GFP_KERNEL);
+        drv_data->dummy = devm_kzalloc(dev, SZ_2K, GFP_KERNEL);
         if (!drv_data->dummy)
                 return -ENOMEM;
 
-        drv_data->tx_chan = dma_request_channel(mask, pxa2xx_spi_dma_filter,
-                                                pdata);
+        drv_data->tx_chan = dma_request_slave_channel_compat(mask,
+                                pxa2xx_spi_dma_filter, pdata, dev, "tx");
         if (!drv_data->tx_chan)
                 return -ENODEV;
 
-        drv_data->rx_chan = dma_request_channel(mask, pxa2xx_spi_dma_filter,
-                                                pdata);
+        drv_data->rx_chan = dma_request_slave_channel_compat(mask,
+                                pxa2xx_spi_dma_filter, pdata, dev, "rx");
         if (!drv_data->rx_chan) {
                 dma_release_channel(drv_data->tx_chan);
                 drv_data->tx_chan = NULL;
diff --git a/drivers/spi/spi-pxa2xx.c b/drivers/spi/spi-pxa2xx.c
index e5d782332ca5..d20b31ae96d3 100644
--- a/drivers/spi/spi-pxa2xx.c
+++ b/drivers/spi/spi-pxa2xx.c
@@ -1040,32 +1040,10 @@ static void cleanup(struct spi_device *spi)
 }
 
 #ifdef CONFIG_ACPI
-static int pxa2xx_spi_acpi_add_dma(struct acpi_resource *res, void *data)
-{
-        struct pxa2xx_spi_master *pdata = data;
-
-        if (res->type == ACPI_RESOURCE_TYPE_FIXED_DMA) {
-                const struct acpi_resource_fixed_dma *dma;
-
-                dma = &res->data.fixed_dma;
-                if (pdata->tx_slave_id < 0) {
-                        pdata->tx_slave_id = dma->request_lines;
-                        pdata->tx_chan_id = dma->channels;
-                } else if (pdata->rx_slave_id < 0) {
-                        pdata->rx_slave_id = dma->request_lines;
-                        pdata->rx_chan_id = dma->channels;
-                }
-        }
-
-        /* Tell the ACPI core to skip this resource */
-        return 1;
-}
-
 static struct pxa2xx_spi_master *
 pxa2xx_spi_acpi_get_pdata(struct platform_device *pdev)
 {
         struct pxa2xx_spi_master *pdata;
-        struct list_head resource_list;
         struct acpi_device *adev;
         struct ssp_device *ssp;
         struct resource *res;
@@ -1103,15 +1081,7 @@ pxa2xx_spi_acpi_get_pdata(struct platform_device *pdev)
                 ssp->port_id = devid;
 
         pdata->num_chipselect = 1;
-        pdata->rx_slave_id = -1;
-        pdata->tx_slave_id = -1;
-
-        INIT_LIST_HEAD(&resource_list);
-        acpi_dev_get_resources(adev, &resource_list, pxa2xx_spi_acpi_add_dma,
-                               pdata);
-        acpi_dev_free_resource_list(&resource_list);
-
-        pdata->enable_dma = pdata->rx_slave_id >= 0 && pdata->tx_slave_id >= 0;
+        pdata->enable_dma = true;
 
         return pdata;
 }
@@ -1214,7 +1184,7 @@ static int pxa2xx_spi_probe(struct platform_device *pdev)
         if (platform_info->enable_dma) {
                 status = pxa2xx_spi_dma_setup(drv_data);
                 if (status) {
-                        dev_warn(dev, "failed to setup DMA, using PIO\n");
+                        dev_dbg(dev, "no DMA channels available, using PIO\n");
                         platform_info->enable_dma = false;
                 }
         }