dmaengine: dw: platform: provide platform data for Intel

Provide platform data explicitly for Intel SoCs where dw_dmac is enumerated by
ACPI.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

1 files changed, 16 insertions, 1 deletions

diff --git a/drivers/dma/dw/platform.c b/drivers/dma/dw/platform.c
index b2c3ae071429..68a4815750b5 100644
--- a/drivers/dma/dw/platform.c
+++ b/drivers/dma/dw/platform.c
@@ -155,6 +155,7 @@ static int dw_probe(struct platform_device *pdev)
         struct dw_dma_chip *chip;
         struct device *dev = &pdev->dev;
         struct resource *mem;
+        const struct acpi_device_id *id;
         struct dw_dma_platform_data *pdata;
         int err;
 
@@ -178,6 +179,11 @@ static int dw_probe(struct platform_device *pdev)
         pdata = dev_get_platdata(dev);
         if (!pdata)
                 pdata = dw_dma_parse_dt(pdev);
+        if (!pdata && has_acpi_companion(dev)) {
+                id = acpi_match_device(dev->driver->acpi_match_table, dev);
+                if (id)
+                        pdata = (struct dw_dma_platform_data *)id->driver_data;
+        }
 
         chip->dev = dev;
 
@@ -246,8 +252,17 @@ MODULE_DEVICE_TABLE(of, dw_dma_of_id_table);
 #endif
 
 #ifdef CONFIG_ACPI
+static struct dw_dma_platform_data dw_dma_acpi_pdata = {
+        .nr_channels = 8,
+        .is_private = true,
+        .chan_allocation_order = CHAN_ALLOCATION_ASCENDING,
+        .chan_priority = CHAN_PRIORITY_ASCENDING,
+        .block_size = 4095,
+        .nr_masters = 2,
+};
+
 static const struct acpi_device_id dw_dma_acpi_id_table[] = {
-        { "INTL9C60", 0 },
+        { "INTL9C60", (kernel_ulong_t)&dw_dma_acpi_pdata },
         { }
 };
 MODULE_DEVICE_TABLE(acpi, dw_dma_acpi_id_table);