From: Milo Kim Date: Fri, 6 Dec 2013 02:18:41 +0000 (+0900) Subject: mfd: Add LP3943 MFD driver X-Git-Tag: v3.14-rc1~142^2~36 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=470eca47bded10f2e1a425b44d6f2b1418271a9f;p=pandora-kernel.git 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 Signed-off-by: Lee Jones --- Reading git-diff-tree failed