mfd: Turn on the twl4030-madc MADC clock

BugLink: http://bugs.launchpad.net/bugs/913373

commit 3d6271f92e98094584fd1e609a9969cd33e61122 upstream.

Without turning the MADC clock on, no MADC conversions occur.

$ cat /sys/class/hwmon/hwmon0/device/in8_input
[   53.428436] twl4030_madc twl4030_madc: conversion timeout!
cat: read error: Resource temporarily unavailable

Signed-off-by: Kyle Manna <kyle@kylemanna.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Brad Figg <brad.figg@canonical.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/include/linux/i2c/twl4030-madc.h b/include/linux/i2c/twl4030-madc.h
index 6427d298fbf..530e11ba073 100644
--- a/include/linux/i2c/twl4030-madc.h
+++ b/include/linux/i2c/twl4030-madc.h
@@ -129,6 +129,10 @@ enum sample_type {
 #define REG_BCICTL2             0x024
 #define TWL4030_BCI_ITHSENS     0x007
 
+/* Register and bits for GPBR1 register */
+#define TWL4030_REG_GPBR1               0x0c
+#define TWL4030_GPBR1_MADC_HFCLK_EN     (1 << 7)
+
 struct twl4030_madc_user_parms {
         int channel;
         int average;