spi: add transfer histogram statistics via sysfs
report transfer sizes as a histogram via the following files:
/sys/class/spi_master/spi*/statistics/transfer_bytes_histo_*
/sys/class/spi_master/spi*/spi*.*/statistics/transfer_bytes_histo_*
Signed-off-by: Martin Sperl <[email protected]>
Signed-off-by: Mark Brown <[email protected]>
diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h
index 269e8af..5b6fdc4 100644
--- a/include/linux/spi/spi.h
+++ b/include/linux/spi/spi.h
@@ -51,6 +51,8 @@
* @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 */
@@ -68,6 +70,8 @@
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,
