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Commit 39d14478 authored by Andy Shevchenko's avatar Andy Shevchenko Committed by Vinod Koul
Browse files

acpi-dma: align documentation with kernel-doc format 



It mostly fixes the "RETURN" sections in the resulting manual page.

There is no functional change.

Signed-off-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: default avatarVinod Koul <vinod.koul@intel.com>
parent af58652a

drivers/dma/acpi-dma.c

+24 −12
Original line number Diff line number Diff line
@@ -30,11 +30,12 @@ static DEFINE_MUTEX(acpi_dma_lock); 
 * @adev:	ACPI device to match with

 * @adma:	struct acpi_dma of the given DMA controller

 *

 * Returns 1 on success, 0 when no information is available, or appropriate

 * errno value on error.

 *

 * In order to match a device from DSDT table to the corresponding CSRT device

 * we use MMIO address and IRQ.

 *

 * Return:

 * 1 on success, 0 when no information is available, or appropriate errno value

 * on error.

 */

static int acpi_dma_parse_resource_group(const struct acpi_csrt_group *grp,

		struct acpi_device *adev, struct acpi_dma *adma)
@@ -101,7 +102,6 @@ static int acpi_dma_parse_resource_group(const struct acpi_csrt_group *grp, 
 *

 * We are using this table to get the request line range of the specific DMA

 * controller to be used later.

 *

 */

static void acpi_dma_parse_csrt(struct acpi_device *adev, struct acpi_dma *adma)

{
@@ -141,10 +141,11 @@ static void acpi_dma_parse_csrt(struct acpi_device *adev, struct acpi_dma *adma) 
 * @data		pointer to controller specific data to be used by

 *			translation function

 *

 * Returns 0 on success or appropriate errno value on error.

 *

 * Allocated memory should be freed with appropriate acpi_dma_controller_free()

 * call.

 *

 * Return:

 * 0 on success or appropriate errno value on error.

 */

int acpi_dma_controller_register(struct device *dev,

		struct dma_chan *(*acpi_dma_xlate)
@@ -188,6 +189,9 @@ EXPORT_SYMBOL_GPL(acpi_dma_controller_register); 
 * @dev:	struct device of DMA controller

 *

 * Memory allocated by acpi_dma_controller_register() is freed here.

 *

 * Return:

 * 0 on success or appropriate errno value on error.

 */

int acpi_dma_controller_free(struct device *dev)

{
@@ -225,6 +229,9 @@ static void devm_acpi_dma_release(struct device *dev, void *res) 
 * Managed acpi_dma_controller_register(). DMA controller registered by this

 * function are automatically freed on driver detach. See

 * acpi_dma_controller_register() for more information.

 *

 * Return:

 * 0 on success or appropriate errno value on error.

 */

int devm_acpi_dma_controller_register(struct device *dev,

		struct dma_chan *(*acpi_dma_xlate)
@@ -267,8 +274,6 @@ EXPORT_SYMBOL_GPL(devm_acpi_dma_controller_free); 
 * @adma:	struct acpi_dma of DMA controller

 * @dma_spec:	dma specifier to update

 *

 * Returns 0, if no information is avaiable, -1 on mismatch, and 1 otherwise.

 *

 * Accordingly to ACPI 5.0 Specification Table 6-170 "Fixed DMA Resource

 * Descriptor":

 *	DMA Request Line bits is a platform-relative number uniquely
@@ -276,6 +281,9 @@ EXPORT_SYMBOL_GPL(devm_acpi_dma_controller_free); 
 *	mapping is done in a controller-specific OS driver.

 * That's why we can safely adjust slave_id when the appropriate controller is

 * found.

 *

 * Return:

 * 0, if no information is avaiable, -1 on mismatch, and 1 otherwise.

 */

static int acpi_dma_update_dma_spec(struct acpi_dma *adma,

		struct acpi_dma_spec *dma_spec)
@@ -334,7 +342,8 @@ static int acpi_dma_parse_fixed_dma(struct acpi_resource *res, void *data) 
 * @dev:	struct device to get DMA request from

 * @index:	index of FixedDMA descriptor for @dev

 *

 * Returns pointer to appropriate dma channel on success or NULL on error.

 * Return:

 * Pointer to appropriate dma channel on success or NULL on error.

 */

struct dma_chan *acpi_dma_request_slave_chan_by_index(struct device *dev,

		size_t index)
@@ -403,7 +412,8 @@ 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.

 *

 * Returns pointer to appropriate dma channel on success or NULL on error.

 * Return:

 * Pointer to appropriate dma channel on success or NULL on error.

 */

struct dma_chan *acpi_dma_request_slave_chan_by_name(struct device *dev,

		const char *name)
@@ -427,8 +437,10 @@ EXPORT_SYMBOL_GPL(acpi_dma_request_slave_chan_by_name); 
 * @adma: pointer to ACPI DMA controller data

 *

 * A simple translation function for ACPI based devices. Passes &struct

 * dma_spec to the DMA controller driver provided filter function. Returns

 * pointer to the channel if found or %NULL otherwise.

 * dma_spec to the DMA controller driver provided filter function.

 *

 * Return:

 * Pointer to the channel if found or %NULL otherwise.

 */

struct dma_chan *acpi_dma_simple_xlate(struct acpi_dma_spec *dma_spec,

		struct acpi_dma *adma)