4 files changed, 374 insertions, 0 deletions

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index fc419da8d722..82f70dcab136 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -597,6 +597,17 @@ config MFD_RC5T583
           Additional drivers must be enabled in order to use the
           different functionality of the device.
 
+config MFD_RN5T618
+        tristate "Ricoh RN5T5618 PMIC"
+        depends on I2C
+        select MFD_CORE
+        select REGMAP_I2C
+        help
+          Say yes here to add support for the Ricoh RN5T618 PMIC. This
+          driver provides common support for accessing the device,
+          additional drivers must be enabled in order to use the
+          functionality of the device.
+
 config MFD_SEC_CORE
         bool "SAMSUNG Electronics PMIC Series Support"
         depends on I2C=y
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index d58068aa8aa9..aa5a73a5ba47 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -160,6 +160,7 @@ obj-$(CONFIG_MFD_INTEL_MSIC)	+= intel_msic.o
 obj-$(CONFIG_MFD_PALMAS)        += palmas.o
 obj-$(CONFIG_MFD_VIPERBOARD)    += viperboard.o
 obj-$(CONFIG_MFD_RC5T583)       += rc5t583.o rc5t583-irq.o
+obj-$(CONFIG_MFD_RN5T618)       += rn5t618.o
 obj-$(CONFIG_MFD_SEC_CORE)      += sec-core.o sec-irq.o
 obj-$(CONFIG_MFD_SYSCON)        += syscon.o
 obj-$(CONFIG_MFD_LM3533)        += lm3533-core.o lm3533-ctrlbank.o
diff --git a/drivers/mfd/rn5t618.c b/drivers/mfd/rn5t618.c
new file mode 100644
index 000000000000..666857192dbe
--- /dev/null
+++ b/drivers/mfd/rn5t618.c
@@ -0,0 +1,134 @@
+/*
+ * MFD core driver for Ricoh RN5T618 PMIC
+ *
+ * Copyright (C) 2014 Beniamino Galvani <b.galvani@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * 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/mfd/core.h>
+#include <linux/mfd/rn5t618.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+
+static const struct mfd_cell rn5t618_cells[] = {
+        { .name = "rn5t618-regulator" },
+        { .name = "rn5t618-wdt" },
+};
+
+static bool rn5t618_volatile_reg(struct device *dev, unsigned int reg)
+{
+        switch (reg) {
+        case RN5T618_WATCHDOGCNT:
+        case RN5T618_DCIRQ:
+        case RN5T618_ILIMDATAH ... RN5T618_AIN0DATAL:
+        case RN5T618_IR_ADC1 ... RN5T618_IR_ADC3:
+        case RN5T618_IR_GPR:
+        case RN5T618_IR_GPF:
+        case RN5T618_MON_IOIN:
+        case RN5T618_INTMON:
+                return true;
+        default:
+                return false;
+        }
+}
+
+static const struct regmap_config rn5t618_regmap_config = {
+        .reg_bits       = 8,
+        .val_bits       = 8,
+        .volatile_reg   = rn5t618_volatile_reg,
+        .max_register   = RN5T618_MAX_REG,
+        .cache_type     = REGCACHE_RBTREE,
+};
+
+static struct rn5t618 *rn5t618_pm_power_off;
+
+static void rn5t618_power_off(void)
+{
+        /* disable automatic repower-on */
+        regmap_update_bits(rn5t618_pm_power_off->regmap, RN5T618_REPCNT,
+                           RN5T618_REPCNT_REPWRON, 0);
+        /* start power-off sequence */
+        regmap_update_bits(rn5t618_pm_power_off->regmap, RN5T618_SLPCNT,
+                           RN5T618_SLPCNT_SWPWROFF, RN5T618_SLPCNT_SWPWROFF);
+}
+
+static int rn5t618_i2c_probe(struct i2c_client *i2c,
+                             const struct i2c_device_id *id)
+{
+        struct rn5t618 *priv;
+        int ret;
+
+        priv = devm_kzalloc(&i2c->dev, sizeof(*priv), GFP_KERNEL);
+        if (!priv)
+                return -ENOMEM;
+
+        i2c_set_clientdata(i2c, priv);
+
+        priv->regmap = devm_regmap_init_i2c(i2c, &rn5t618_regmap_config);
+        if (IS_ERR(priv->regmap)) {
+                ret = PTR_ERR(priv->regmap);
+                dev_err(&i2c->dev, "regmap init failed: %d\n", ret);
+                return ret;
+        }
+
+        ret = mfd_add_devices(&i2c->dev, -1, rn5t618_cells,
+                              ARRAY_SIZE(rn5t618_cells), NULL, 0, NULL);
+        if (ret) {
+                dev_err(&i2c->dev, "failed to add sub-devices: %d\n", ret);
+                return ret;
+        }
+
+        if (!pm_power_off) {
+                rn5t618_pm_power_off = priv;
+                pm_power_off = rn5t618_power_off;
+        }
+
+        return 0;
+}
+
+static int rn5t618_i2c_remove(struct i2c_client *i2c)
+{
+        struct rn5t618 *priv = i2c_get_clientdata(i2c);
+
+        if (priv == rn5t618_pm_power_off) {
+                rn5t618_pm_power_off = NULL;
+                pm_power_off = NULL;
+        }
+
+        mfd_remove_devices(&i2c->dev);
+        return 0;
+}
+
+static const struct of_device_id rn5t618_of_match[] = {
+        { .compatible = "ricoh,rn5t618" },
+        { }
+};
+MODULE_DEVICE_TABLE(of, rn5t618_of_match);
+
+static const struct i2c_device_id rn5t618_i2c_id[] = {
+        { }
+};
+MODULE_DEVICE_TABLE(i2c, rn5t618_i2c_id);
+
+static struct i2c_driver rn5t618_i2c_driver = {
+        .driver = {
+                .name = "rn5t618",
+                .of_match_table = of_match_ptr(rn5t618_of_match),
+        },
+        .probe = rn5t618_i2c_probe,
+        .remove = rn5t618_i2c_remove,
+        .id_table = rn5t618_i2c_id,
+};
+
+module_i2c_driver(rn5t618_i2c_driver);
+
+MODULE_AUTHOR("Beniamino Galvani <b.galvani@gmail.com>");
+MODULE_DESCRIPTION("Ricoh RN5T618 MFD driver");
+MODULE_LICENSE("GPL v2");
diff --git a/include/linux/mfd/rn5t618.h b/include/linux/mfd/rn5t618.h
new file mode 100644
index 000000000000..c72d5344f3b3
--- /dev/null
+++ b/include/linux/mfd/rn5t618.h
@@ -0,0 +1,228 @@
+/*
+ * MFD core driver for Ricoh RN5T618 PMIC
+ *
+ * Copyright (C) 2014 Beniamino Galvani <b.galvani@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __LINUX_MFD_RN5T618_H
+#define __LINUX_MFD_RN5T618_H
+
+#include <linux/regmap.h>
+
+#define RN5T618_LSIVER                  0x00
+#define RN5T618_OTPVER                  0x01
+#define RN5T618_IODAC                   0x02
+#define RN5T618_VINDAC                  0x03
+#define RN5T618_CPUCNT                  0x06
+#define RN5T618_PSWR                    0x07
+#define RN5T618_PONHIS                  0x09
+#define RN5T618_POFFHIS                 0x0a
+#define RN5T618_WATCHDOG                0x0b
+#define RN5T618_WATCHDOGCNT             0x0c
+#define RN5T618_PWRFUNC                 0x0d
+#define RN5T618_SLPCNT                  0x0e
+#define RN5T618_REPCNT                  0x0f
+#define RN5T618_PWRONTIMSET             0x10
+#define RN5T618_NOETIMSETCNT            0x11
+#define RN5T618_PWRIREN                 0x12
+#define RN5T618_PWRIRQ                  0x13
+#define RN5T618_PWRMON                  0x14
+#define RN5T618_PWRIRSEL                0x15
+#define RN5T618_DC1_SLOT                0x16
+#define RN5T618_DC2_SLOT                0x17
+#define RN5T618_DC3_SLOT                0x18
+#define RN5T618_LDO1_SLOT               0x1b
+#define RN5T618_LDO2_SLOT               0x1c
+#define RN5T618_LDO3_SLOT               0x1d
+#define RN5T618_LDO4_SLOT               0x1e
+#define RN5T618_LDO5_SLOT               0x1f
+#define RN5T618_PSO0_SLOT               0x25
+#define RN5T618_PSO1_SLOT               0x26
+#define RN5T618_PSO2_SLOT               0x27
+#define RN5T618_PSO3_SLOT               0x28
+#define RN5T618_LDORTC1_SLOT            0x2a
+#define RN5T618_DC1CTL                  0x2c
+#define RN5T618_DC1CTL2                 0x2d
+#define RN5T618_DC2CTL                  0x2e
+#define RN5T618_DC2CTL2                 0x2f
+#define RN5T618_DC3CTL                  0x30
+#define RN5T618_DC3CTL2                 0x31
+#define RN5T618_DC1DAC                  0x36
+#define RN5T618_DC2DAC                  0x37
+#define RN5T618_DC3DAC                  0x38
+#define RN5T618_DC1DAC_SLP              0x3b
+#define RN5T618_DC2DAC_SLP              0x3c
+#define RN5T618_DC3DAC_SLP              0x3d
+#define RN5T618_DCIREN                  0x40
+#define RN5T618_DCIRQ                   0x41
+#define RN5T618_DCIRMON                 0x42
+#define RN5T618_LDOEN1                  0x44
+#define RN5T618_LDOEN2                  0x45
+#define RN5T618_LDODIS                  0x46
+#define RN5T618_LDO1DAC                 0x4c
+#define RN5T618_LDO2DAC                 0x4d
+#define RN5T618_LDO3DAC                 0x4e
+#define RN5T618_LDO4DAC                 0x4f
+#define RN5T618_LDO5DAC                 0x50
+#define RN5T618_LDORTCDAC               0x56
+#define RN5T618_LDORTC2DAC              0x57
+#define RN5T618_LDO1DAC_SLP             0x58
+#define RN5T618_LDO2DAC_SLP             0x59
+#define RN5T618_LDO3DAC_SLP             0x5a
+#define RN5T618_LDO4DAC_SLP             0x5b
+#define RN5T618_LDO5DAC_SLP             0x5c
+#define RN5T618_ADCCNT1                 0x64
+#define RN5T618_ADCCNT2                 0x65
+#define RN5T618_ADCCNT3                 0x66
+#define RN5T618_ILIMDATAH               0x68
+#define RN5T618_ILIMDATAL               0x69
+#define RN5T618_VBATDATAH               0x6a
+#define RN5T618_VBATDATAL               0x6b
+#define RN5T618_VADPDATAH               0x6c
+#define RN5T618_VADPDATAL               0x6d
+#define RN5T618_VUSBDATAH               0x6e
+#define RN5T618_VUSBDATAL               0x6f
+#define RN5T618_VSYSDATAH               0x70
+#define RN5T618_VSYSDATAL               0x71
+#define RN5T618_VTHMDATAH               0x72
+#define RN5T618_VTHMDATAL               0x73
+#define RN5T618_AIN1DATAH               0x74
+#define RN5T618_AIN1DATAL               0x75
+#define RN5T618_AIN0DATAH               0x76
+#define RN5T618_AIN0DATAL               0x77
+#define RN5T618_ILIMTHL                 0x78
+#define RN5T618_ILIMTHH                 0x79
+#define RN5T618_VBATTHL                 0x7a
+#define RN5T618_VBATTHH                 0x7b
+#define RN5T618_VADPTHL                 0x7c
+#define RN5T618_VADPTHH                 0x7d
+#define RN5T618_VUSBTHL                 0x7e
+#define RN5T618_VUSBTHH                 0x7f
+#define RN5T618_VSYSTHL                 0x80
+#define RN5T618_VSYSTHH                 0x81
+#define RN5T618_VTHMTHL                 0x82
+#define RN5T618_VTHMTHH                 0x83
+#define RN5T618_AIN1THL                 0x84
+#define RN5T618_AIN1THH                 0x85
+#define RN5T618_AIN0THL                 0x86
+#define RN5T618_AIN0THH                 0x87
+#define RN5T618_EN_ADCIR1               0x88
+#define RN5T618_EN_ADCIR2               0x89
+#define RN5T618_EN_ADCIR3               0x8a
+#define RN5T618_IR_ADC1                 0x8c
+#define RN5T618_IR_ADC2                 0x8d
+#define RN5T618_IR_ADC3                 0x8e
+#define RN5T618_IOSEL                   0x90
+#define RN5T618_IOOUT                   0x91
+#define RN5T618_GPEDGE1                 0x92
+#define RN5T618_GPEDGE2                 0x93
+#define RN5T618_EN_GPIR                 0x94
+#define RN5T618_IR_GPR                  0x95
+#define RN5T618_IR_GPF                  0x96
+#define RN5T618_MON_IOIN                0x97
+#define RN5T618_GPLED_FUNC              0x98
+#define RN5T618_INTPOL                  0x9c
+#define RN5T618_INTEN                   0x9d
+#define RN5T618_INTMON                  0x9e
+#define RN5T618_PREVINDAC               0xb0
+#define RN5T618_BATDAC                  0xb1
+#define RN5T618_CHGCTL1                 0xb3
+#define RN5T618_CHGCTL2                 0xb4
+#define RN5T618_VSYSSET                 0xb5
+#define RN5T618_REGISET1                0xb6
+#define RN5T618_REGISET2                0xb7
+#define RN5T618_CHGISET                 0xb8
+#define RN5T618_TIMSET                  0xb9
+#define RN5T618_BATSET1                 0xba
+#define RN5T618_BATSET2                 0xbb
+#define RN5T618_DIESET                  0xbc
+#define RN5T618_CHGSTATE                0xbd
+#define RN5T618_CHGCTRL_IRFMASK         0xbe
+#define RN5T618_CHGSTAT_IRFMASK1        0xbf
+#define RN5T618_CHGSTAT_IRFMASK2        0xc0
+#define RN5T618_CHGERR_IRFMASK          0xc1
+#define RN5T618_CHGCTRL_IRR             0xc2
+#define RN5T618_CHGSTAT_IRR1            0xc3
+#define RN5T618_CHGSTAT_IRR2            0xc4
+#define RN5T618_CHGERR_IRR              0xc5
+#define RN5T618_CHGCTRL_MONI            0xc6
+#define RN5T618_CHGSTAT_MONI1           0xc7
+#define RN5T618_CHGSTAT_MONI2           0xc8
+#define RN5T618_CHGERR_MONI             0xc9
+#define RN5T618_CHGCTRL_DETMOD1         0xca
+#define RN5T618_CHGCTRL_DETMOD2         0xcb
+#define RN5T618_CHGSTAT_DETMOD1         0xcc
+#define RN5T618_CHGSTAT_DETMOD2         0xcd
+#define RN5T618_CHGSTAT_DETMOD3         0xce
+#define RN5T618_CHGERR_DETMOD1          0xcf
+#define RN5T618_CHGERR_DETMOD2          0xd0
+#define RN5T618_CHGOSCCTL               0xd4
+#define RN5T618_CHGOSCSCORESET1         0xd5
+#define RN5T618_CHGOSCSCORESET2         0xd6
+#define RN5T618_CHGOSCSCORESET3         0xd7
+#define RN5T618_CHGOSCFREQSET1          0xd8
+#define RN5T618_CHGOSCFREQSET2          0xd9
+#define RN5T618_CONTROL                 0xe0
+#define RN5T618_SOC                     0xe1
+#define RN5T618_RE_CAP_H                0xe2
+#define RN5T618_RE_CAP_L                0xe3
+#define RN5T618_FA_CAP_H                0xe4
+#define RN5T618_FA_CAP_L                0xe5
+#define RN5T618_AGE                     0xe6
+#define RN5T618_TT_EMPTY_H              0xe7
+#define RN5T618_TT_EMPTY_L              0xe8
+#define RN5T618_TT_FULL_H               0xe9
+#define RN5T618_TT_FULL_L               0xea
+#define RN5T618_VOLTAGE_1               0xeb
+#define RN5T618_VOLTAGE_0               0xec
+#define RN5T618_TEMP_1                  0xed
+#define RN5T618_TEMP_0                  0xee
+#define RN5T618_CC_CTRL                 0xef
+#define RN5T618_CC_COUNT2               0xf0
+#define RN5T618_CC_COUNT1               0xf1
+#define RN5T618_CC_COUNT0               0xf2
+#define RN5T618_CC_SUMREG3              0xf3
+#define RN5T618_CC_SUMREG2              0xf4
+#define RN5T618_CC_SUMREG1              0xf5
+#define RN5T618_CC_SUMREG0              0xf6
+#define RN5T618_CC_OFFREG1              0xf7
+#define RN5T618_CC_OFFREG0              0xf8
+#define RN5T618_CC_GAINREG1             0xf9
+#define RN5T618_CC_GAINREG0             0xfa
+#define RN5T618_CC_AVEREG1              0xfb
+#define RN5T618_CC_AVEREG0              0xfc
+#define RN5T618_MAX_REG                 0xfc
+
+#define RN5T618_REPCNT_REPWRON          BIT(0)
+#define RN5T618_SLPCNT_SWPWROFF         BIT(0)
+#define RN5T618_WATCHDOG_WDOGEN         BIT(2)
+#define RN5T618_WATCHDOG_WDOGTIM_M      (BIT(0) | BIT(1))
+#define RN5T618_WATCHDOG_WDOGTIM_S      0
+#define RN5T618_PWRIRQ_IR_WDOG          BIT(6)
+
+enum {
+        RN5T618_DCDC1,
+        RN5T618_DCDC2,
+        RN5T618_DCDC3,
+        RN5T618_LDO1,
+        RN5T618_LDO2,
+        RN5T618_LDO3,
+        RN5T618_LDO4,
+        RN5T618_LDO5,
+        RN5T618_LDORTC1,
+        RN5T618_LDORTC2,
+        RN5T618_REG_NUM,
+};
+
+struct rn5t618 {
+        struct regmap *regmap;
+};
+
+#endif /* __LINUX_MFD_RN5T618_H */