mfd: bq2419x: add mfd driver
Laxman Dewangan [Fri, 30 Nov 2012 00:26:59 +0000 (19:26 -0500)]
BQ24190, BQ24192 supports the battery charging and VBUS path.
Adding mfd driver for this device which register regulator for
vbus and battery charging driver.

Change-Id: If8862ec86cc966a42a66986a609ea22b161bab4c
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Reviewed-on: http://git-master/r/167528
Reviewed-by: Mrutyunjay Sawant <msawant@nvidia.com>
Tested-by: Mrutyunjay Sawant <msawant@nvidia.com>

drivers/mfd/Kconfig
drivers/mfd/Makefile
drivers/mfd/bq2419x.c [new file with mode: 0644]
include/linux/mfd/bq2419x.h [new file with mode: 0644]

index 5e18375..e311773 100644 (file)
@@ -46,6 +46,14 @@ config MFD_ASIC3
          This driver supports the ASIC3 multifunction chip found on many
          PDAs (mainly iPAQ and HTC based ones)
 
+config MFD_BQ2419X
+       bool "Support for bq24190, bq24911, bq24192"
+       depends on I2C=y
+       select MFD_CORE
+       select REGMAP_I2C
+       help
+         This supports the bq24190, bq24911, bq24192 drivers.
+
 config MFD_DAVINCI_VOICECODEC
        tristate
        select MFD_CORE
index 00fc5cc..3a72df4 100644 (file)
@@ -11,6 +11,7 @@ obj-$(CONFIG_HTC_EGPIO)               += htc-egpio.o
 obj-$(CONFIG_HTC_PASIC3)       += htc-pasic3.o
 obj-$(CONFIG_HTC_I2CPLD)       += htc-i2cpld.o
 
+obj-$(CONFIG_MFD_BQ2419X)              += bq2419x.o
 obj-$(CONFIG_MFD_DAVINCI_VOICECODEC)   += davinci_voicecodec.o
 obj-$(CONFIG_MFD_DM355EVM_MSP) += dm355evm_msp.o
 obj-$(CONFIG_MFD_TI_SSP)       += ti-ssp.o
diff --git a/drivers/mfd/bq2419x.c b/drivers/mfd/bq2419x.c
new file mode 100644 (file)
index 0000000..71c510e
--- /dev/null
@@ -0,0 +1,136 @@
+/*
+ * bq2419x.c --  bq2419x
+ *
+ * MFD driver for BQ2419X charger.
+ *
+ * Copyright (c) 2012, NVIDIA Corporation.
+ *
+ * Author: Laxman Dewangan <ldewangan@nvidia.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.
+ *
+ * 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
+ */
+
+#include <linux/err.h>
+#include <linux/gpio.h>
+#include <linux/i2c.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/bq2419x.h>
+#include <linux/slab.h>
+
+static struct mfd_cell bq2419x_children[] = {
+       {.name = "bq2419x-pmic",},
+       {.name = "bq2419x-battery-charger",},
+};
+
+static const struct regmap_config bq2419x_regmap_config = {
+       .reg_bits               = 8,
+       .val_bits               = 8,
+       .max_register           = BQ2419X_MAX_REGS,
+       .cache_type             = REGCACHE_RBTREE,
+};
+
+static int __devinit bq2419x_probe(struct i2c_client *client,
+                       const struct i2c_device_id *id)
+{
+       struct bq2419x_platform_data *pdata;
+       struct bq2419x_chip *bq;
+       int ret;
+
+       pdata = client->dev.platform_data;
+       if (!pdata) {
+               dev_err(&client->dev, "No Platform data");
+               return -EIO;
+       }
+
+       bq = devm_kzalloc(&client->dev, sizeof(*bq), GFP_KERNEL);
+       if (!bq) {
+               dev_err(&client->dev, "Memory allocation failed\n");
+               return -ENOMEM;
+       }
+
+       bq->dev = &client->dev;
+       bq->regmap = devm_regmap_init_i2c(client, &bq2419x_regmap_config);
+       if (IS_ERR(bq->regmap)) {
+               ret = PTR_ERR(bq->regmap);
+               dev_err(&client->dev, "regmap init failed with err %d\n", ret);
+               return ret;
+       }
+       i2c_set_clientdata(client, bq);
+
+       if (pdata->disable_watchdog) {
+               ret = regmap_update_bits(bq->regmap, BQ2419X_WD,
+                                       BQ2419X_WD_MASK, BQ2419X_WD_DISABLE);
+               if (ret < 0) {
+                       dev_err(bq->dev, "register %d update failed with err %d",
+                               BQ2419X_WD, ret);
+                       return ret;
+               }
+       }
+
+       ret = mfd_add_devices(bq->dev, -1, bq2419x_children,
+                       ARRAY_SIZE(bq2419x_children), NULL, 0);
+       if (ret < 0) {
+               dev_err(bq->dev,
+                       "registering mfd sub devices failed, err = %d\n", ret);
+               return ret;
+       }
+       return 0;
+}
+
+static int __devexit bq2419x_remove(struct i2c_client *client)
+{
+       struct bq2419x_chip *bq = i2c_get_clientdata(client);
+
+       mfd_remove_devices(bq->dev);
+       return 0;
+}
+
+static const struct i2c_device_id bq2419x_id[] = {
+       {.name = "bq2419x",},
+       {},
+};
+
+MODULE_DEVICE_TABLE(i2c, bq2419x_id);
+
+static struct i2c_driver bq2419x_i2c_driver = {
+       .driver = {
+               .name = "bq2419x",
+               .owner = THIS_MODULE,
+       },
+       .probe = bq2419x_probe,
+       .remove = __devexit_p(bq2419x_remove),
+       .id_table = bq2419x_id,
+};
+
+static int __init bq2419x_init(void)
+{
+       return i2c_add_driver(&bq2419x_i2c_driver);
+}
+subsys_initcall(bq2419x_init);
+
+static void __exit bq2419x_cleanup(void)
+{
+       i2c_del_driver(&bq2419x_i2c_driver);
+}
+module_exit(bq2419x_cleanup);
+
+MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>");
+MODULE_DESCRIPTION("BQ2419X mfd core driver");
+MODULE_LICENSE("GPL v2");
diff --git a/include/linux/mfd/bq2419x.h b/include/linux/mfd/bq2419x.h
new file mode 100644 (file)
index 0000000..84be60c
--- /dev/null
@@ -0,0 +1,93 @@
+/*
+ * bq2419x.h -- BQ2419X driver
+ *
+ * Interface for mfd/regualtor/battery charging driver for BQ2419X VBUS.
+ *
+ * Copyright (C) 2012 NVIDIA Corporation
+
+ * Author: Laxman Dewangan <ldewangan@nvidia.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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+#ifndef __LINUX_MFD_BQ2419X_H
+#define __LINUX_MFD_BQ2419X_H
+
+struct regmap;
+
+#define BQ2419X_INPUT_SRC_REG   0x00
+#define BQ2419X_PWR_ON_REG      0x01
+#define BQ2419X_CHRG_CTRL_REG   0x02
+#define BQ2419X_CHRG_TERM_REG   0x03
+#define BQ2419X_VOLT_CTRL_REG   0x04
+#define BQ2419X_TIME_CTRL_REG   0x05
+#define BQ2419X_THERM_REG       0x06
+#define BQ2419X_MISC_OPER_REG   0x07
+#define BQ2419X_SYS_STAT_REG    0x08
+#define BQ2419X_FAULT_REG       0x09
+#define BQ2419X_REVISION_REG    0x0a
+
+#define BQ24190_IC_VER          0x40
+#define BQ24192_IC_VER          0x28
+#define BQ24192i_IC_VER         0x18
+#define ENABLE_CHARGE_MASK      0x30
+#define ENABLE_CHARGE           0x10
+
+#define BQ2419X_REG0                   0x0
+#define BQ2419X_EN_HIZ                 BIT(7)
+
+#define BQ2419X_OTG                    0x1
+#define BQ2419X_OTG_ENABLE_MASK                0x30
+#define BQ2419X_OTG_ENABLE             0x20
+
+#define BQ2419X_WD                     0x5
+#define BQ2419X_WD_MASK                        0x30
+#define BQ2419X_WD_DISABLE             0x0
+
+#define BQ2419X_MAX_REGS               (BQ2419X_REVISION_REG + 1)
+
+/* bq2419x chip information */
+struct bq2419x_chip {
+       struct device *dev;
+       struct regmap *regmap;
+};
+
+/*
+ * struct bq2419x_regulator_platform_data - bq2419x regulator platform data.
+ *
+ * @reg_init_data: The regulator init data.
+ * @gpio_otg_iusb: Gpio number for OTG/IUSB
+ */
+struct bq2419x_regulator_platform_data {
+       struct regulator_init_data *reg_init_data;
+       int gpio_otg_iusb;
+};
+
+struct bq2419x_charger_platform_data {
+       int gpio_interrupt;
+       int gpio_status;
+       int usb_in_current_limit;
+       int ac_in_current_limit;
+       unsigned use_mains:1;
+       unsigned use_usb:1;
+};
+struct bq2419x_platform_data {
+       struct bq2419x_regulator_platform_data *reg_pdata;
+       struct bq2419x_charger_platform_data *bcharger_pdata;
+       bool disable_watchdog;
+};
+
+#endif /* __LINUX_MFD_BQ2419X_H */