Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-10 22:21:40 +00:00
Code Issues Packages Projects Releases Wiki Activity

mfd: twl6040: Select i2c fast mode as default with regmap patch

Browse Source 
All boards using twl6040 configures the i2c bus to 400KHz. While twl6040's
defaults to normal mode (100KHz). So far twl6040 has no problem with i2c
communication in this configuration it is safer to select fast i2c mode.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
This commit is contained in:
Peter Ujfalusi 2014-04-01 16:44:59 +03:00 committed by Lee Jones
parent 02d02728ea
commit 11e38e11af
2 changed files with 8 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
drivers/mfd/twl6040.c
View File

@ -87,8 +87,13 @@ static struct reg_default twl6040_defaults[] = {
};
static struct reg_default twl6040_patch[] = {
/* Select I2C bus access to dual access registers */
{ TWL6040_REG_ACCCTL, 0x09 },
/*
* Select I2C bus access to dual access registers
* Interrupt register is cleared on read
* Select fast mode for i2c (400KHz)
*/
{ TWL6040_REG_ACCCTL,
TWL6040_I2CSEL | TWL6040_INTCLRMODE | TWL6040_I2CMODE(1) },
};

1
include/linux/mfd/twl6040.h
View File

@ -157,6 +157,7 @@
#define TWL6040_I2CSEL 0x01
#define TWL6040_RESETSPLIT 0x04
#define TWL6040_INTCLRMODE 0x08
#define TWL6040_I2CMODE(x) ((x & 0x3) << 4)
/* STATUS (0x2E) fields */