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SPI: Support setting the lock mode

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Lorenz Meier
2016-01-22 17:11:46 +01:00
parent 7a8ef6c0e4
commit e88367d722
1 changed files with 16 additions and 6 deletions
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src/drivers/device/spi.h
+16 -6
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@@ -77,6 +77,15 @@ protected:
int irq = 0);
virtual ~SPI();
/**
* Locking modes supported by the driver.
*/
enum LockMode {
LOCK_PREEMPTION, /**< the default; lock against all forms of preemption. */
LOCK_THREADS, /**< lock only against other threads, using SPI_LOCK */
LOCK_NONE /**< perform no locking, only safe if the bus is entirely private */
};
virtual int init();
/**
@@ -117,13 +126,14 @@ protected:
void set_frequency(uint32_t frequency);
/**
* Locking modes supported by the driver.
* Set the SPI bus locking mode
*
* This set the SPI locking mode. For devices competing with NuttX SPI
* drivers on a bus the right lock mode is LOCK_THREADS.
*
* @param mode Locking mode
*/
enum LockMode {
LOCK_PREEMPTION, /**< the default; lock against all forms of preemption. */
LOCK_THREADS, /**< lock only against other threads, using SPI_LOCK */
LOCK_NONE /**< perform no locking, only safe if the bus is entirely private */
};
void set_lockmode(enum LockMode mode) { locking_mode = mode; }
LockMode locking_mode; /**< selected locking mode */