A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-29 11:11:45 -04:00
Code Issues Projects Releases Packages Wiki Activity

Merge branch 'device-properties'

Browse source 
* device-properties:
  ACPI / property: Fix subnode lookup scope for data-only subnodes
  acpi-dma: Add support for "dma-names" device property
  device property: Add fwnode_property_match_string()
  ACPI / property: Extend device_get_next_child_node() to data-only nodes
  ACPI / gpio: Split acpi_get_gpiod_by_index()
  ACPI / property: Extend fwnode_property_* to data-only subnodes
  ACPI / property: Expose data-only subnodes via sysfs
  ACPI / property: Add support for data-only subnodes
  ACPI / property: Add routine for extraction of _DSD properties
This commit is contained in:
Rafael J. Wysocki 2015-10-25 22:51:48 +01:00
commit ab736d7dc1
12 changed files with 760 additions and 194 deletions
Download patch file Download diff file Expand all files Collapse all files

23
drivers/dma/acpi-dma.c
View file

@ -21,6 +21,7 @@
#include <linux/ioport.h>
#include <linux/acpi.h>
#include <linux/acpi_dma.h>
#include <linux/property.h>
static LIST_HEAD(acpi_dma_list);
static DEFINE_MUTEX(acpi_dma_lock);
@ -413,21 +414,29 @@ EXPORT_SYMBOL_GPL(acpi_dma_request_slave_chan_by_index);
* translate the names "tx" and "rx" here based on the most common case where
* the first FixedDMA descriptor is TX and second is RX.
*
* If the device has "dma-names" property the FixedDMA descriptor indices
* are retrieved based on those. Otherwise the function falls back using
* hardcoded indices.
*
* Return:
* Pointer to appropriate dma channel on success or an error pointer.
*/
struct dma_chan *acpi_dma_request_slave_chan_by_name(struct device *dev,
const char *name)
{
size_t index;
int index;
if (!strcmp(name, "tx"))
index = 0;
else if (!strcmp(name, "rx"))
index = 1;
else
return ERR_PTR(-ENODEV);
index = device_property_match_string(dev, "dma-names", name);
if (index < 0) {
if (!strcmp(name, "tx"))
index = 0;
else if (!strcmp(name, "rx"))
index = 1;
else
return ERR_PTR(-ENODEV);
}
dev_dbg(dev, "found DMA channel \"%s\" at index %d\n", name, index);
return acpi_dma_request_slave_chan_by_index(dev, index);
}
EXPORT_SYMBOL_GPL(acpi_dma_request_slave_chan_by_name);