mfd: Add Maxim 77686 driver

This patch is device driver for MAX77686 chip.
MAX77686 is PMIC and includes regulator and rtc on it.
This driver is core of MAX77686 chip, so provides common support for
accessing on-chip devices. It uses irq_domain to manage irq and regmap
to read/write data to its register with i2c bus.

Signed-off-by: Chiwoong Byun <woong.byun@samsung.com>
Signed-off-by: Jonghwa Lee <jonghwa3.lee@samsung.com>
Signed-off-by: Myungjoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 117 insertions, 0 deletions

diff --git a/include/linux/mfd/max77686.h b/include/linux/mfd/max77686.h
new file mode 100644
index 000000000000..fcf312678cac
--- /dev/null
+++ b/include/linux/mfd/max77686.h
@@ -0,0 +1,117 @@
+/*
+ * max77686.h - Driver for the Maxim 77686
+ *
+ *  Copyright (C) 2012 Samsung Electrnoics
+ *  Chiwoong Byun <woong.byun@samsung.com>
+ *
+ * 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 2 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * This driver is based on max8997.h
+ *
+ * MAX77686 has PMIC, RTC devices.
+ * The devices share the same I2C bus and included in
+ * this mfd driver.
+ */
+
+#ifndef __LINUX_MFD_MAX77686_H
+#define __LINUX_MFD_MAX77686_H
+
+#include <linux/regulator/consumer.h>
+
+/* MAX77686 regulator IDs */
+enum max77686_regulators {
+        MAX77686_LDO1 = 0,
+        MAX77686_LDO2,
+        MAX77686_LDO3,
+        MAX77686_LDO4,
+        MAX77686_LDO5,
+        MAX77686_LDO6,
+        MAX77686_LDO7,
+        MAX77686_LDO8,
+        MAX77686_LDO9,
+        MAX77686_LDO10,
+        MAX77686_LDO11,
+        MAX77686_LDO12,
+        MAX77686_LDO13,
+        MAX77686_LDO14,
+        MAX77686_LDO15,
+        MAX77686_LDO16,
+        MAX77686_LDO17,
+        MAX77686_LDO18,
+        MAX77686_LDO19,
+        MAX77686_LDO20,
+        MAX77686_LDO21,
+        MAX77686_LDO22,
+        MAX77686_LDO23,
+        MAX77686_LDO24,
+        MAX77686_LDO25,
+        MAX77686_LDO26,
+        MAX77686_BUCK1,
+        MAX77686_BUCK2,
+        MAX77686_BUCK3,
+        MAX77686_BUCK4,
+        MAX77686_BUCK5,
+        MAX77686_BUCK6,
+        MAX77686_BUCK7,
+        MAX77686_BUCK8,
+        MAX77686_BUCK9,
+        MAX77686_EN32KHZ_AP,
+        MAX77686_EN32KHZ_CP,
+        MAX77686_P32KH,
+
+        MAX77686_REG_MAX,
+};
+
+struct max77686_regulator_data {
+        int id;
+        struct regulator_init_data *initdata;
+};
+
+enum max77686_opmode {
+        MAX77686_OPMODE_NORMAL,
+        MAX77686_OPMODE_LP,
+        MAX77686_OPMODE_STANDBY,
+};
+
+struct max77686_opmode_data {
+        int id;
+        int mode;
+};
+
+struct max77686_platform_data {
+        /* IRQ */
+        int irq_gpio;
+        int ono;
+        int wakeup;
+
+        /* ---- PMIC ---- */
+        struct max77686_regulator_data *regulators;
+        int num_regulators;
+
+        struct max77686_opmode_data *opmode_data;
+
+        /*
+         * GPIO-DVS feature is not enabled with the current version of
+         * MAX77686 driver. Buck2/3/4_voltages[0] is used as the default
+         * voltage at probe. DVS/SELB gpios are set as OUTPUT-LOW.
+         */
+        int buck234_gpio_dvs[3]; /* GPIO of [0]DVS1, [1]DVS2, [2]DVS3 */
+        int buck234_gpio_selb[3]; /* [0]SELB2, [1]SELB3, [2]SELB4 */
+        unsigned int buck2_voltage[8]; /* buckx_voltage in uV */
+        unsigned int buck3_voltage[8];
+        unsigned int buck4_voltage[8];
+};
+
+#endif /* __LINUX_MFD_MAX77686_H */