/**
* struct spi_statistics - statistics for spi transfers
- * @clock: lock protecting this structure
+ * @lock: lock protecting this structure
*
* @messages: number of spi-messages handled
* @transfers: number of spi_transfers handled
* @bytes_tx: number of bytes sent to device
* @bytes_rx: number of bytes received from device
*
+ * @transfer_bytes_histo:
+ * transfer bytes histogramm
*/
struct spi_statistics {
spinlock_t lock; /* lock for the whole structure */
unsigned long long bytes_rx;
unsigned long long bytes_tx;
+#define SPI_STATISTICS_HISTO_SIZE 17
+ unsigned long transfer_bytes_histo[SPI_STATISTICS_HISTO_SIZE];
};
void spi_statistics_add_transfer_stats(struct spi_statistics *stats,
return drv ? container_of(drv, struct spi_driver, driver) : NULL;
}
-extern int spi_register_driver(struct spi_driver *sdrv);
+extern int __spi_register_driver(struct module *owner, struct spi_driver *sdrv);
/**
* spi_unregister_driver - reverse effect of spi_register_driver
driver_unregister(&sdrv->driver);
}
+/* use a define to avoid include chaining to get THIS_MODULE */
+#define spi_register_driver(driver) \
+ __spi_register_driver(THIS_MODULE, driver)
+
/**
* module_spi_driver() - Helper macro for registering a SPI driver
* @__spi_driver: spi_driver struct
* @len: data buffer size
* Context: can sleep
*
- * This writes the buffer and returns zero or a negative error code.
+ * This function writes the buffer @buf.
* Callable only from contexts that can sleep.
+ *
+ * Return: zero on success, else a negative error code.
*/
static inline int
spi_write(struct spi_device *spi, const void *buf, size_t len)
* @len: data buffer size
* Context: can sleep
*
- * This reads the buffer and returns zero or a negative error code.
+ * This function reads the buffer @buf.
* Callable only from contexts that can sleep.
+ *
+ * Return: zero on success, else a negative error code.
*/
static inline int
spi_read(struct spi_device *spi, void *buf, size_t len)
*
* For more specific semantics see spi_sync().
*
- * It returns zero on success, else a negative error code.
+ * Return: Return: zero on success, else a negative error code.
*/
static inline int
spi_sync_transfer(struct spi_device *spi, struct spi_transfer *xfers,
* @cmd: command to be written before data is read back
* Context: can sleep
*
- * This returns the (unsigned) eight bit number returned by the
- * device, or else a negative error code. Callable only from
- * contexts that can sleep.
+ * Callable only from contexts that can sleep.
+ *
+ * Return: the (unsigned) eight bit number returned by the
+ * device, or else a negative error code.
*/
static inline ssize_t spi_w8r8(struct spi_device *spi, u8 cmd)
{
* @cmd: command to be written before data is read back
* Context: can sleep
*
- * This returns the (unsigned) sixteen bit number returned by the
- * device, or else a negative error code. Callable only from
- * contexts that can sleep.
- *
* The number is returned in wire-order, which is at least sometimes
* big-endian.
+ *
+ * Callable only from contexts that can sleep.
+ *
+ * Return: the (unsigned) sixteen bit number returned by the
+ * device, or else a negative error code.
*/
static inline ssize_t spi_w8r16(struct spi_device *spi, u8 cmd)
{
* @cmd: command to be written before data is read back
* Context: can sleep
*
- * This returns the (unsigned) sixteen bit number returned by the device in cpu
- * endianness, or else a negative error code. Callable only from contexts that
- * can sleep.
- *
* This function is similar to spi_w8r16, with the exception that it will
* convert the read 16 bit data word from big-endian to native endianness.
*
+ * Callable only from contexts that can sleep.
+ *
+ * Return: the (unsigned) sixteen bit number returned by the device in cpu
+ * endianness, or else a negative error code.
*/
static inline ssize_t spi_w8r16be(struct spi_device *spi, u8 cmd)