Provide platform data explicitly for Intel SoCs where dw_dmac is enumerated by
ACPI.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
---
drivers/dma/dw/platform.c | 17 ++++++++++++++++-
1 file changed, 16 insertions(+), 1 deletion(-)
diff --git a/drivers/dma/dw/platform.c b/drivers/dma/dw/platform.c
index b2c3ae0..68a4815 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);
--
2.5.3
--
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