dmaengine: dw: platform: Enable iDMA 32-bit on Intel Elkhart Lake

Intel® PSE (Programmable Services Engine) provides few DMA controllers
to the host on Intel Elkhart Lake. Enable them in the ACPI glue driver.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20190820131546.75744-6-andriy.shevchenko@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

diff --git a/drivers/dma/dw/platform.c b/drivers/dma/dw/platform.c
index 234abbd..63465fd 100644 (file)
--- a/drivers/dma/dw/platform.c
+++ b/drivers/dma/dw/platform.c
@@ -173,7 +173,6 @@ static int dw_probe(struct platform_device *pdev)
        struct dw_dma_chip *chip;
        struct device *dev = &pdev->dev;
        struct resource *mem;
-       const struct dw_dma_platform_data *pdata;
        int err;
 
        match = device_get_match_data(dev);
@@ -201,13 +200,14 @@ static int dw_probe(struct platform_device *pdev)
        if (err)
                return err;
 
-       pdata = dev_get_platdata(dev);
-       if (!pdata)
-               pdata = dw_dma_parse_dt(pdev);
+       if (!data->pdata)
+               data->pdata = dev_get_platdata(dev);
+       if (!data->pdata)
+               data->pdata = dw_dma_parse_dt(pdev);
 
        chip->dev = dev;
        chip->id = pdev->id;
-       chip->pdata = pdata;
+       chip->pdata = data->pdata;
 
        data->chip = chip;
 
@@ -298,6 +298,12 @@ static const struct acpi_device_id dw_dma_acpi_id_table[] = {
        { "INTL9C60", (kernel_ulong_t)&dw_dma_chip_pdata },
        { "80862286", (kernel_ulong_t)&dw_dma_chip_pdata },
        { "808622C0", (kernel_ulong_t)&dw_dma_chip_pdata },
+
+       /* Elkhart Lake iDMA 32-bit (PSE DMA) */
+       { "80864BB4", (kernel_ulong_t)&idma32_chip_pdata },
+       { "80864BB5", (kernel_ulong_t)&idma32_chip_pdata },
+       { "80864BB6", (kernel_ulong_t)&idma32_chip_pdata },
+
        { }
 };
 MODULE_DEVICE_TABLE(acpi, dw_dma_acpi_id_table);