mfd: Add new mfd device for TPS65217

The TPS65217 chip is a power management IC for Portable Navigation Systems
and Tablet Computing devices. It contains the following components:

- Regulators
- White LED
- USB battery charger

This patch adds support for tps65217 mfd device. At this time only
the regulator functionality is made available.

Signed-off-by: AnilKumar Ch <anilkumar@ti.com>
Reviwed-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

4 files changed, 541 insertions, 0 deletions

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index f147395bac9a..c559d352c420 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -143,6 +143,21 @@ config TPS6507X
           This driver can also be built as a module.  If so, the module
           will be called tps6507x.
 
+config MFD_TPS65217
+        tristate "TPS65217 Power Management / White LED chips"
+        depends on I2C
+        select MFD_CORE
+        select REGMAP_I2C
+        help
+          If you say yes here you get support for the TPS65217 series of
+          Power Management / White LED chips.
+          These include voltage regulators, lithium ion/polymer battery
+          charger, wled and other features that are often used in portable
+          devices.
+
+          This driver can also be built as a module.  If so, the module
+          will be called tps65217.
+
 config MFD_TPS6586X
         bool "TPS6586x Power Management chips"
         depends on I2C=y && GPIOLIB && GENERIC_HARDIRQS
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index b953bab934f7..27430d3e839c 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -38,6 +38,7 @@ obj-$(CONFIG_MFD_WM8994)	+= wm8994-core.o wm8994-irq.o wm8994-regmap.o
 obj-$(CONFIG_TPS6105X)          += tps6105x.o
 obj-$(CONFIG_TPS65010)          += tps65010.o
 obj-$(CONFIG_TPS6507X)          += tps6507x.o
+obj-$(CONFIG_MFD_TPS65217)      += tps65217.o
 obj-$(CONFIG_MFD_TPS65910)      += tps65910.o tps65910-irq.o
 tps65912-objs                   := tps65912-core.o tps65912-irq.o
 obj-$(CONFIG_MFD_TPS65912)      += tps65912.o
diff --git a/drivers/mfd/tps65217.c b/drivers/mfd/tps65217.c
new file mode 100644
index 000000000000..f7d854e4cc62
--- /dev/null
+++ b/drivers/mfd/tps65217.c
@@ -0,0 +1,242 @@
+/*
+ * tps65217.c
+ *
+ * TPS65217 chip family multi-function driver
+ *
+ * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.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 version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/init.h>
+#include <linux/i2c.h>
+#include <linux/slab.h>
+#include <linux/regmap.h>
+#include <linux/err.h>
+
+#include <linux/mfd/core.h>
+#include <linux/mfd/tps65217.h>
+
+/**
+ * tps65217_reg_read: Read a single tps65217 register.
+ *
+ * @tps: Device to read from.
+ * @reg: Register to read.
+ * @val: Contians the value
+ */
+int tps65217_reg_read(struct tps65217 *tps, unsigned int reg,
+                        unsigned int *val)
+{
+        return regmap_read(tps->regmap, reg, val);
+}
+EXPORT_SYMBOL_GPL(tps65217_reg_read);
+
+/**
+ * tps65217_reg_write: Write a single tps65217 register.
+ *
+ * @tps65217: Device to write to.
+ * @reg: Register to write to.
+ * @val: Value to write.
+ * @level: Password protected level
+ */
+int tps65217_reg_write(struct tps65217 *tps, unsigned int reg,
+                        unsigned int val, unsigned int level)
+{
+        int ret;
+        unsigned int xor_reg_val;
+
+        switch (level) {
+        case TPS65217_PROTECT_NONE:
+                return regmap_write(tps->regmap, reg, val);
+        case TPS65217_PROTECT_L1:
+                xor_reg_val = reg ^ TPS65217_PASSWORD_REGS_UNLOCK;
+                ret = regmap_write(tps->regmap, TPS65217_REG_PASSWORD,
+                                                        xor_reg_val);
+                if (ret < 0)
+                        return ret;
+
+                return regmap_write(tps->regmap, reg, val);
+        case TPS65217_PROTECT_L2:
+                xor_reg_val = reg ^ TPS65217_PASSWORD_REGS_UNLOCK;
+                ret = regmap_write(tps->regmap, TPS65217_REG_PASSWORD,
+                                                        xor_reg_val);
+                if (ret < 0)
+                        return ret;
+                ret = regmap_write(tps->regmap, reg, val);
+                if (ret < 0)
+                        return ret;
+                ret = regmap_write(tps->regmap, TPS65217_REG_PASSWORD,
+                                                        xor_reg_val);
+                if (ret < 0)
+                        return ret;
+                return regmap_write(tps->regmap, reg, val);
+        default:
+                return -EINVAL;
+        }
+}
+EXPORT_SYMBOL_GPL(tps65217_reg_write);
+
+/**
+ * tps65217_update_bits: Modify bits w.r.t mask, val and level.
+ *
+ * @tps65217: Device to write to.
+ * @reg: Register to read-write to.
+ * @mask: Mask.
+ * @val: Value to write.
+ * @level: Password protected level
+ */
+int tps65217_update_bits(struct tps65217 *tps, unsigned int reg,
+                unsigned int mask, unsigned int val, unsigned int level)
+{
+        int ret;
+        unsigned int data;
+
+        ret = tps65217_reg_read(tps, reg, &data);
+        if (ret) {
+                dev_err(tps->dev, "Read from reg 0x%x failed\n", reg);
+                return ret;
+        }
+
+        data &= ~mask;
+        data |= val & mask;
+
+        ret = tps65217_reg_write(tps, reg, data, level);
+        if (ret)
+                dev_err(tps->dev, "Write for reg 0x%x failed\n", reg);
+
+        return ret;
+}
+
+int tps65217_set_bits(struct tps65217 *tps, unsigned int reg,
+                unsigned int mask, unsigned int val, unsigned int level)
+{
+        return tps65217_update_bits(tps, reg, mask, val, level);
+}
+EXPORT_SYMBOL_GPL(tps65217_set_bits);
+
+int tps65217_clear_bits(struct tps65217 *tps, unsigned int reg,
+                unsigned int mask, unsigned int level)
+{
+        return tps65217_update_bits(tps, reg, mask, 0, level);
+}
+EXPORT_SYMBOL_GPL(tps65217_clear_bits);
+
+static struct regmap_config tps65217_regmap_config = {
+        .reg_bits = 8,
+        .val_bits = 8,
+};
+
+static int __devinit tps65217_probe(struct i2c_client *client,
+                                const struct i2c_device_id *ids)
+{
+        struct tps65217 *tps;
+        struct tps65217_board *pdata = client->dev.platform_data;
+        int i, ret;
+        unsigned int version;
+
+        tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
+        if (!tps)
+                return -ENOMEM;
+
+        tps->pdata = pdata;
+        tps->regmap = regmap_init_i2c(client, &tps65217_regmap_config);
+        if (IS_ERR(tps->regmap)) {
+                ret = PTR_ERR(tps->regmap);
+                dev_err(tps->dev, "Failed to allocate register map: %d\n",
+                        ret);
+                return ret;
+        }
+
+        i2c_set_clientdata(client, tps);
+        tps->dev = &client->dev;
+
+        ret = tps65217_reg_read(tps, TPS65217_REG_CHIPID, &version);
+        if (ret < 0) {
+                dev_err(tps->dev, "Failed to read revision"
+                                        " register: %d\n", ret);
+                goto err_regmap;
+        }
+
+        dev_info(tps->dev, "TPS65217 ID %#x version 1.%d\n",
+                        (version & TPS65217_CHIPID_CHIP_MASK) >> 4,
+                        version & TPS65217_CHIPID_REV_MASK);
+
+        for (i = 0; i < TPS65217_NUM_REGULATOR; i++) {
+                struct platform_device *pdev;
+
+                pdev = platform_device_alloc("tps65217-pmic", i);
+                if (!pdev) {
+                        dev_err(tps->dev, "Cannot create regulator %d\n", i);
+                        continue;
+                }
+
+                pdev->dev.parent = tps->dev;
+                platform_device_add_data(pdev, &pdata->tps65217_init_data[i],
+                                        sizeof(pdata->tps65217_init_data[i]));
+                tps->regulator_pdev[i] = pdev;
+
+                platform_device_add(pdev);
+        }
+
+        return 0;
+
+err_regmap:
+        regmap_exit(tps->regmap);
+
+        return ret;
+}
+
+static int __devexit tps65217_remove(struct i2c_client *client)
+{
+        struct tps65217 *tps = i2c_get_clientdata(client);
+        int i;
+
+        for (i = 0; i < TPS65217_NUM_REGULATOR; i++)
+                platform_device_unregister(tps->regulator_pdev[i]);
+
+        regmap_exit(tps->regmap);
+
+        return 0;
+}
+
+static const struct i2c_device_id tps65217_id_table[] = {
+        {"tps65217", 0xF0},
+        {/* end of list */}
+};
+MODULE_DEVICE_TABLE(i2c, tps65217_id_table);
+
+static struct i2c_driver tps65217_driver = {
+        .driver         = {
+                .name   = "tps65217",
+        },
+        .id_table       = tps65217_id_table,
+        .probe          = tps65217_probe,
+        .remove         = __devexit_p(tps65217_remove),
+};
+
+static int __init tps65217_init(void)
+{
+        return i2c_add_driver(&tps65217_driver);
+}
+subsys_initcall(tps65217_init);
+
+static void __exit tps65217_exit(void)
+{
+        i2c_del_driver(&tps65217_driver);
+}
+module_exit(tps65217_exit);
+
+MODULE_AUTHOR("AnilKumar Ch <anilkumar@ti.com>");
+MODULE_DESCRIPTION("TPS65217 chip family multi-function driver");
+MODULE_LICENSE("GPL v2");
diff --git a/include/linux/mfd/tps65217.h b/include/linux/mfd/tps65217.h
new file mode 100644
index 000000000000..e030ef9a64ee
--- /dev/null
+++ b/include/linux/mfd/tps65217.h
@@ -0,0 +1,283 @@
+/*
+ * linux/mfd/tps65217.h
+ *
+ * Functions to access TPS65217 power management chip.
+ *
+ * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.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 version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __LINUX_MFD_TPS65217_H
+#define __LINUX_MFD_TPS65217_H
+
+#include <linux/i2c.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+
+/* I2C ID for TPS65217 part */
+#define TPS65217_I2C_ID                 0x24
+
+/* All register addresses */
+#define TPS65217_REG_CHIPID             0X00
+#define TPS65217_REG_PPATH              0X01
+#define TPS65217_REG_INT                0X02
+#define TPS65217_REG_CHGCONFIG0         0X03
+#define TPS65217_REG_CHGCONFIG1         0X04
+#define TPS65217_REG_CHGCONFIG2         0X05
+#define TPS65217_REG_CHGCONFIG3         0X06
+#define TPS65217_REG_WLEDCTRL1          0X07
+#define TPS65217_REG_WLEDCTRL2          0X08
+#define TPS65217_REG_MUXCTRL            0X09
+#define TPS65217_REG_STATUS             0X0A
+#define TPS65217_REG_PASSWORD           0X0B
+#define TPS65217_REG_PGOOD              0X0C
+#define TPS65217_REG_DEFPG              0X0D
+#define TPS65217_REG_DEFDCDC1           0X0E
+#define TPS65217_REG_DEFDCDC2           0X0F
+#define TPS65217_REG_DEFDCDC3           0X10
+#define TPS65217_REG_DEFSLEW            0X11
+#define TPS65217_REG_DEFLDO1            0X12
+#define TPS65217_REG_DEFLDO2            0X13
+#define TPS65217_REG_DEFLS1             0X14
+#define TPS65217_REG_DEFLS2             0X15
+#define TPS65217_REG_ENABLE             0X16
+#define TPS65217_REG_DEFUVLO            0X18
+#define TPS65217_REG_SEQ1               0X19
+#define TPS65217_REG_SEQ2               0X1A
+#define TPS65217_REG_SEQ3               0X1B
+#define TPS65217_REG_SEQ4               0X1C
+#define TPS65217_REG_SEQ5               0X1D
+#define TPS65217_REG_SEQ6               0X1E
+
+/* Register field definitions */
+#define TPS65217_CHIPID_CHIP_MASK       0xF0
+#define TPS65217_CHIPID_REV_MASK        0x0F
+
+#define TPS65217_PPATH_ACSINK_ENABLE    BIT(7)
+#define TPS65217_PPATH_USBSINK_ENABLE   BIT(6)
+#define TPS65217_PPATH_AC_PW_ENABLE     BIT(5)
+#define TPS65217_PPATH_USB_PW_ENABLE    BIT(4)
+#define TPS65217_PPATH_AC_CURRENT_MASK  0x0C
+#define TPS65217_PPATH_USB_CURRENT_MASK 0x03
+
+#define TPS65217_INT_PBM                BIT(6)
+#define TPS65217_INT_ACM                BIT(5)
+#define TPS65217_INT_USBM               BIT(4)
+#define TPS65217_INT_PBI                BIT(2)
+#define TPS65217_INT_ACI                BIT(1)
+#define TPS65217_INT_USBI               BIT(0)
+
+#define TPS65217_CHGCONFIG0_TREG        BIT(7)
+#define TPS65217_CHGCONFIG0_DPPM        BIT(6)
+#define TPS65217_CHGCONFIG0_TSUSP       BIT(5)
+#define TPS65217_CHGCONFIG0_TERMI       BIT(4)
+#define TPS65217_CHGCONFIG0_ACTIVE      BIT(3)
+#define TPS65217_CHGCONFIG0_CHGTOUT     BIT(2)
+#define TPS65217_CHGCONFIG0_PCHGTOUT    BIT(1)
+#define TPS65217_CHGCONFIG0_BATTEMP     BIT(0)
+
+#define TPS65217_CHGCONFIG1_TMR_MASK    0xC0
+#define TPS65217_CHGCONFIG1_TMR_ENABLE  BIT(5)
+#define TPS65217_CHGCONFIG1_NTC_TYPE    BIT(4)
+#define TPS65217_CHGCONFIG1_RESET       BIT(3)
+#define TPS65217_CHGCONFIG1_TERM        BIT(2)
+#define TPS65217_CHGCONFIG1_SUSP        BIT(1)
+#define TPS65217_CHGCONFIG1_CHG_EN      BIT(0)
+
+#define TPS65217_CHGCONFIG2_DYNTMR      BIT(7)
+#define TPS65217_CHGCONFIG2_VPREGHG     BIT(6)
+#define TPS65217_CHGCONFIG2_VOREG_MASK  0x30
+
+#define TPS65217_CHGCONFIG3_ICHRG_MASK  0xC0
+#define TPS65217_CHGCONFIG3_DPPMTH_MASK 0x30
+#define TPS65217_CHGCONFIG2_PCHRGT      BIT(3)
+#define TPS65217_CHGCONFIG2_TERMIF      0x06
+#define TPS65217_CHGCONFIG2_TRANGE      BIT(0)
+
+#define TPS65217_WLEDCTRL1_ISINK_ENABLE BIT(3)
+#define TPS65217_WLEDCTRL1_ISEL         BIT(2)
+#define TPS65217_WLEDCTRL1_FDIM_MASK    0x03
+
+#define TPS65217_WLEDCTRL2_DUTY_MASK    0x7F
+
+#define TPS65217_MUXCTRL_MUX_MASK       0x07
+
+#define TPS65217_STATUS_OFF             BIT(7)
+#define TPS65217_STATUS_ACPWR           BIT(3)
+#define TPS65217_STATUS_USBPWR          BIT(2)
+#define TPS65217_STATUS_PB              BIT(0)
+
+#define TPS65217_PASSWORD_REGS_UNLOCK   0x7D
+
+#define TPS65217_PGOOD_LDO3_PG          BIT(6)
+#define TPS65217_PGOOD_LDO4_PG          BIT(5)
+#define TPS65217_PGOOD_DC1_PG           BIT(4)
+#define TPS65217_PGOOD_DC2_PG           BIT(3)
+#define TPS65217_PGOOD_DC3_PG           BIT(2)
+#define TPS65217_PGOOD_LDO1_PG          BIT(1)
+#define TPS65217_PGOOD_LDO2_PG          BIT(0)
+
+#define TPS65217_DEFPG_LDO1PGM          BIT(3)
+#define TPS65217_DEFPG_LDO2PGM          BIT(2)
+#define TPS65217_DEFPG_PGDLY_MASK       0x03
+
+#define TPS65217_DEFDCDCX_XADJX         BIT(7)
+#define TPS65217_DEFDCDCX_DCDC_MASK     0x3F
+
+#define TPS65217_DEFSLEW_GO             BIT(7)
+#define TPS65217_DEFSLEW_GODSBL         BIT(6)
+#define TPS65217_DEFSLEW_PFM_EN1        BIT(5)
+#define TPS65217_DEFSLEW_PFM_EN2        BIT(4)
+#define TPS65217_DEFSLEW_PFM_EN3        BIT(3)
+#define TPS65217_DEFSLEW_SLEW_MASK      0x07
+
+#define TPS65217_DEFLDO1_LDO1_MASK      0x0F
+
+#define TPS65217_DEFLDO2_TRACK          BIT(6)
+#define TPS65217_DEFLDO2_LDO2_MASK      0x3F
+
+#define TPS65217_DEFLDO3_LDO3_EN        BIT(5)
+#define TPS65217_DEFLDO3_LDO3_MASK      0x1F
+
+#define TPS65217_DEFLDO4_LDO4_EN        BIT(5)
+#define TPS65217_DEFLDO4_LDO4_MASK      0x1F
+
+#define TPS65217_ENABLE_LS1_EN          BIT(6)
+#define TPS65217_ENABLE_LS2_EN          BIT(5)
+#define TPS65217_ENABLE_DC1_EN          BIT(4)
+#define TPS65217_ENABLE_DC2_EN          BIT(3)
+#define TPS65217_ENABLE_DC3_EN          BIT(2)
+#define TPS65217_ENABLE_LDO1_EN         BIT(1)
+#define TPS65217_ENABLE_LDO2_EN         BIT(0)
+
+#define TPS65217_DEFUVLO_UVLOHYS        BIT(2)
+#define TPS65217_DEFUVLO_UVLO_MASK      0x03
+
+#define TPS65217_SEQ1_DC1_SEQ_MASK      0xF0
+#define TPS65217_SEQ1_DC2_SEQ_MASK      0x0F
+
+#define TPS65217_SEQ2_DC3_SEQ_MASK      0xF0
+#define TPS65217_SEQ2_LDO1_SEQ_MASK     0x0F
+
+#define TPS65217_SEQ3_LDO2_SEQ_MASK     0xF0
+#define TPS65217_SEQ3_LDO3_SEQ_MASK     0x0F
+
+#define TPS65217_SEQ4_LDO4_SEQ_MASK     0xF0
+
+#define TPS65217_SEQ5_DLY1_MASK         0xC0
+#define TPS65217_SEQ5_DLY2_MASK         0x30
+#define TPS65217_SEQ5_DLY3_MASK         0x0C
+#define TPS65217_SEQ5_DLY4_MASK         0x03
+
+#define TPS65217_SEQ6_DLY5_MASK         0xC0
+#define TPS65217_SEQ6_DLY6_MASK         0x30
+#define TPS65217_SEQ6_SEQUP             BIT(2)
+#define TPS65217_SEQ6_SEQDWN            BIT(1)
+#define TPS65217_SEQ6_INSTDWN           BIT(0)
+
+#define TPS65217_MAX_REGISTER           0x1E
+#define TPS65217_PROTECT_NONE           0
+#define TPS65217_PROTECT_L1             1
+#define TPS65217_PROTECT_L2             2
+
+
+enum tps65217_regulator_id {
+        /* DCDC's */
+        TPS65217_DCDC_1,
+        TPS65217_DCDC_2,
+        TPS65217_DCDC_3,
+        /* LDOs */
+        TPS65217_LDO_1,
+        TPS65217_LDO_2,
+        TPS65217_LDO_3,
+        TPS65217_LDO_4,
+};
+
+#define TPS65217_MAX_REG_ID             TPS65217_LDO_4
+
+/* Number of step-down converters available */
+#define TPS65217_NUM_DCDC               3
+/* Number of LDO voltage regulators available */
+#define TPS65217_NUM_LDO                4
+/* Number of total regulators available */
+#define TPS65217_NUM_REGULATOR          (TPS65217_NUM_DCDC + TPS65217_NUM_LDO)
+
+/**
+ * struct tps65217_board - packages regulator init data
+ * @tps65217_regulator_data: regulator initialization values
+ *
+ * Board data may be used to initialize regulator.
+ */
+struct tps65217_board {
+        struct regulator_init_data *tps65217_init_data;
+};
+
+/**
+ * struct tps_info - packages regulator constraints
+ * @name:               Voltage regulator name
+ * @min_uV:             minimum micro volts
+ * @max_uV:             minimum micro volts
+ * @vsel_to_uv:         Function pointer to get voltage from selector
+ * @uv_to_vsel:         Function pointer to get selector from voltage
+ * @table:              Table for non-uniform voltage step-size
+ * @table_len:          Length of the voltage table
+ * @enable_mask:        Regulator enable mask bits
+ * @set_vout_reg:       Regulator output voltage set register
+ * @set_vout_mask:      Regulator output voltage set mask
+ *
+ * This data is used to check the regualtor voltage limits while setting.
+ */
+struct tps_info {
+        const char *name;
+        int min_uV;
+        int max_uV;
+        int (*vsel_to_uv)(unsigned int vsel);
+        int (*uv_to_vsel)(int uV, unsigned int *vsel);
+        const int *table;
+        unsigned int table_len;
+        unsigned int enable_mask;
+        unsigned int set_vout_reg;
+        unsigned int set_vout_mask;
+};
+
+/**
+ * struct tps65217 - tps65217 sub-driver chip access routines
+ *
+ * Device data may be used to access the TPS65217 chip
+ */
+
+struct tps65217 {
+        struct device *dev;
+        struct tps65217_board *pdata;
+        struct regulator_desc desc[TPS65217_NUM_REGULATOR];
+        struct regulator_dev *rdev[TPS65217_NUM_REGULATOR];
+        struct tps_info *info[TPS65217_NUM_REGULATOR];
+        struct regmap *regmap;
+
+        /* Client devices */
+        struct platform_device *regulator_pdev[TPS65217_NUM_REGULATOR];
+};
+
+static inline struct tps65217 *dev_to_tps65217(struct device *dev)
+{
+        return dev_get_drvdata(dev);
+}
+
+int tps65217_reg_read(struct tps65217 *tps, unsigned int reg,
+                                        unsigned int *val);
+int tps65217_reg_write(struct tps65217 *tps, unsigned int reg,
+                        unsigned int val, unsigned int level);
+int tps65217_set_bits(struct tps65217 *tps, unsigned int reg,
+                unsigned int mask, unsigned int val, unsigned int level);
+int tps65217_clear_bits(struct tps65217 *tps, unsigned int reg,
+                unsigned int mask, unsigned int level);
+
+#endif /*  __LINUX_MFD_TPS65217_H */