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dmaengine: hsu: Export hsu_dma_get_status()

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To allow other code to safely read DMA Channel Status Register (where
the register attribute for Channel Error, Descriptor Time Out &
Descriptor Done fields are read-clear), export hsu_dma_get_status().
hsu_dma_irq() is renamed to hsu_dma_do_irq() and requires Status
Register value to be passed in.

Signed-off-by: Chuah, Kim Tatt <kim.tatt.chuah@intel.com>
Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Chuah, Kim Tatt
2016-06-15 13:44:11 +08:00
committed by Greg Kroah-Hartman
parent d03516df83
commit c6f82787a5
4 changed files with 105 additions and 30 deletions
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14
include/linux/dma/hsu.h
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@@ -39,14 +39,22 @@ struct hsu_dma_chip {
#if IS_ENABLED(CONFIG_HSU_DMA)
/* Export to the internal users */
irqreturn_t hsu_dma_irq(struct hsu_dma_chip *chip, unsigned short nr);
int hsu_dma_get_status(struct hsu_dma_chip *chip, unsigned short nr,
u32 *status);
irqreturn_t hsu_dma_do_irq(struct hsu_dma_chip *chip, unsigned short nr,
u32 status);
/* Export to the platform drivers */
int hsu_dma_probe(struct hsu_dma_chip *chip);
int hsu_dma_remove(struct hsu_dma_chip *chip);
#else
static inline irqreturn_t hsu_dma_irq(struct hsu_dma_chip *chip,
unsigned short nr)
static inline int hsu_dma_get_status(struct hsu_dma_chip *chip,
unsigned short nr, u32 *status)
{
return 0;
}
static inline irqreturn_t hsu_dma_do_irq(struct hsu_dma_chip *chip,
unsigned short nr, u32 status)
{
return IRQ_NONE;
}