Signed-off-by: NAxel Lin <axel.lin@ingics.com>
Acked-by: NG.Shark Jeong <gshark.jeong@gmail.com>
Signed-off-by: NBryan Wu <cooloney@gmail.com>

Use regmap_update_bits() to replace regmap_read() + regmap_write().
With this patch, we only show the error message when regmap_update_bits()
fails.
Signed-off-by: NAxel Lin <axel.lin@ingics.com>
Acked-by: G.Shark Jeong<gshark.jeong@gmail.com>
Signed-off-by: NBryan Wu <bryan.wu@canonical.com>

This driver is a general version for LM642 led chip of TI.

LM3642 :
The LM3642 is a 4MHz fixed-frequency synchronous boost
converter plus 1.5A constant current driver for a high-current
white LED.
The LM3642 is controlled via an I2C-compatible interface.
Signed-off-by: NG.Shark Jeong <gshark.jeong@gmail.com>
Signed-off-by: NBryan Wu <bryan.wu@canonical.com>