Talos™ II Linux sources for OpenBMC https://git.raptorcs.com/git/talos-obmc-linux/atom?h=v3.16 2014-01-21T08:27:59+00:00 2014-01-21T08:27:59+00:00 Milo Kim milo.kim@ti.com 2013-12-06T02:18:41+00:00 urn:sha1:470eca47bded10f2e1a425b44d6f2b1418271a9f 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>