adding drivers/elphel

drivers/elphel/Kconfig

+#
+# Elphel devices
+#
+
+menu "Elphel devices"
+config LTC3589
+	tristate "Support LTC3589 voltage regulator"
+	depends on I2C && SYSFS
+	help
+	  Say Y here if you have a Elphel board 10393.
+endmenu

drivers/elphel/Makefile

+#
+# Makefile for Elphel specific devices.
+#
+
+obj-$(CONFIG_ELPHEL393)	        += elphel393-pwr.o

drivers/elphel/elphel393-pwr.c

+/*!***************************************************************************
+ *! FILE NAME  : elphel393-pwr.c
+ *! DESCRIPTION: power supplies control on Elphel 10393 board 
+ *! Copyright (C) 2013 Elphel, Inc.
+ *! -----------------------------------------------------------------------------**
+ *!
+ *!  This program is free software: you can redistribute it and/or modify
+ *!  it under the terms of the GNU General Public License as published by
+ *!  the Free Software Foundation, either version 3 of the License, or
+ *!  (at your option) any later version.
+ *!
+ *!  This program is distributed in the hope that it will be useful,
+ *!  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *!  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *!  GNU General Public License for more details.
+ *!
+ *!  You should have received a copy of the GNU General Public License
+ *!  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/i2c.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/mutex.h>
+#include <linux/string.h>
+#include <linux/of.h>
+
+MODULE_AUTHOR("Andrey Filippov  <andrey@elphel.com>");
+MODULE_DESCRIPTION("Elphel 10393 power supply control");
+MODULE_LICENSE("GPL");