diff options
| author | Milo Kim <milo.kim@ti.com> | 2013-12-06 11:18:41 +0900 |
|---|---|---|
| committer | Lee Jones <lee.jones@linaro.org> | 2014-01-21 08:27:59 +0000 |
| commit | 470eca47bded10f2e1a425b44d6f2b1418271a9f (patch) | |
| tree | 9e302eabaeb9fd2edd3dfd3c28d821c109f60487 /kernel/cgroup.c | |
| parent | 0cc59b9d98d554168915b3765a14e8b4ad75918c (diff) | |
mfd: Add LP3943 MFD driver
LP3943 has 16 output pins which can be used as GPIO expander and PWM generator.
* Regmap I2C interface for R/W LP3943 registers
* Atomic operations for output pin assignment
The driver should check whether requested pin is available or not.
If the pin is already used, pin request returns as a failure.
A driver data, 'pin_used' is checked when gpio_request() and
pwm_request() are called. If the pin is available, then pin_used is set.
And it is cleared when gpio_free() and pwm_free().
* Device tree support
Compatible strings for GPIO and PWM driver.
LP3943 platform data is PWM related, so parsing the device tree is
implemented in the PWM driver.
Signed-off-by: Milo Kim <milo.kim@ti.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Diffstat (limited to 'kernel/cgroup.c')
0 files changed, 0 insertions, 0 deletions