summaryrefslogtreecommitdiff
path: root/include/linux/mfd/ti_am335x_tscadc.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/linux/mfd/ti_am335x_tscadc.h')
-rw-r--r--include/linux/mfd/ti_am335x_tscadc.h8
1 files changed, 4 insertions, 4 deletions
diff --git a/include/linux/mfd/ti_am335x_tscadc.h b/include/linux/mfd/ti_am335x_tscadc.h
index 2567a87872b0..7f55b8b41032 100644
--- a/include/linux/mfd/ti_am335x_tscadc.h
+++ b/include/linux/mfd/ti_am335x_tscadc.h
@@ -138,16 +138,16 @@
/*
* time in us for processing a single channel, calculated as follows:
*
- * num cycles = open delay + (sample delay + conv time) * averaging
+ * max num cycles = open delay + (sample delay + conv time) * averaging
*
- * num cycles: 152 + (1 + 13) * 16 = 376
+ * max num cycles: 262143 + (255 + 13) * 16 = 266431
*
* clock frequency: 26MHz / 8 = 3.25MHz
* clock period: 1 / 3.25MHz = 308ns
*
- * processing time: 376 * 308ns = 116us
+ * max processing time: 266431 * 308ns = 83ms(approx)
*/
-#define IDLE_TIMEOUT 116 /* microsec */
+#define IDLE_TIMEOUT 83 /* milliseconds */
#define TSCADC_CELLS 2