--- /dev/null
+/*
+ * max8997.c - mfd core driver for the Maxim 8966 and 8997
+ *
+ * Copyright (C) 2011 Samsung Electronics
+ * MyungJoo Ham <myungjoo.ham@smasung.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 max8998.c
+ */
+
+#include <linux/err.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/of.h>
+#include <linux/of_irq.h>
+#include <linux/interrupt.h>
+#include <linux/pm_runtime.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/max8997.h>
+#include <linux/mfd/max8997-private.h>
+
+#define I2C_ADDR_PMIC (0xCC >> 1)
+#define I2C_ADDR_MUIC (0x4A >> 1)
+#define I2C_ADDR_BATTERY (0x6C >> 1)
+#define I2C_ADDR_RTC (0x0C >> 1)
+#define I2C_ADDR_HAPTIC (0x90 >> 1)
+
+static const struct mfd_cell max8997_devs[] = {
+ { .name = "max8997-pmic", },
+ { .name = "max8997-rtc", },
+ { .name = "max8997-battery", },
+ { .name = "max8997-haptic", },
+ { .name = "max8997-muic", },
+ { .name = "max8997-led", .id = 1 },
+ { .name = "max8997-led", .id = 2 },
+};
+
+#ifdef CONFIG_OF
+static const struct of_device_id max8997_pmic_dt_match[] = {
+ { .compatible = "maxim,max8997-pmic", .data = (void *)TYPE_MAX8997 },
+ {},
+};
+#endif
+
+int max8997_read_reg(struct i2c_client *i2c, u8 reg, u8 *dest)
+{
+ struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
+ int ret;
+
+ mutex_lock(&max8997->iolock);
+ ret = i2c_smbus_read_byte_data(i2c, reg);
+ mutex_unlock(&max8997->iolock);
+ if (ret < 0)
+ return ret;
+
+ ret &= 0xff;
+ *dest = ret;
+ return 0;
+}
+EXPORT_SYMBOL_GPL(max8997_read_reg);
+
+int max8997_bulk_read(struct i2c_client *i2c, u8 reg, int count, u8 *buf)
+{
+ struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
+ int ret;
+
+ mutex_lock(&max8997->iolock);
+ ret = i2c_smbus_read_i2c_block_data(i2c, reg, count, buf);
+ mutex_unlock(&max8997->iolock);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(max8997_bulk_read);
+
+int max8997_write_reg(struct i2c_client *i2c, u8 reg, u8 value)
+{
+ struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
+ int ret;
+
+ mutex_lock(&max8997->iolock);
+ ret = i2c_smbus_write_byte_data(i2c, reg, value);
+ mutex_unlock(&max8997->iolock);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(max8997_write_reg);
+
+int max8997_bulk_write(struct i2c_client *i2c, u8 reg, int count, u8 *buf)
+{
+ struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
+ int ret;
+
+ mutex_lock(&max8997->iolock);
+ ret = i2c_smbus_write_i2c_block_data(i2c, reg, count, buf);
+ mutex_unlock(&max8997->iolock);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(max8997_bulk_write);
+
+int max8997_update_reg(struct i2c_client *i2c, u8 reg, u8 val, u8 mask)
+{
+ struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
+ int ret;
+
+ mutex_lock(&max8997->iolock);
+ ret = i2c_smbus_read_byte_data(i2c, reg);
+ if (ret >= 0) {
+ u8 old_val = ret & 0xff;
+ u8 new_val = (val & mask) | (old_val & (~mask));
+ ret = i2c_smbus_write_byte_data(i2c, reg, new_val);
+ }
+ mutex_unlock(&max8997->iolock);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(max8997_update_reg);
+
+/*
+ * Only the common platform data elements for max8997 are parsed here from the
+ * device tree. Other sub-modules of max8997 such as pmic, rtc and others have
+ * to parse their own platform data elements from device tree.
+ *
+ * The max8997 platform data structure is instantiated here and the drivers for
+ * the sub-modules need not instantiate another instance while parsing their
+ * platform data.
+ */
+static struct max8997_platform_data *max8997_i2c_parse_dt_pdata(
+ struct device *dev)
+{
+ struct max8997_platform_data *pd;
+
+ pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL);
+ if (!pd) {
+ dev_err(dev, "could not allocate memory for pdata\n");
+ return ERR_PTR(-ENOMEM);
+ }
+
+ pd->ono = irq_of_parse_and_map(dev->of_node, 1);
+
+ /*
+ * ToDo: the 'wakeup' member in the platform data is more of a linux
+ * specfic information. Hence, there is no binding for that yet and
+ * not parsed here.
+ */
+
+ return pd;
+}
+
+static inline unsigned long max8997_i2c_get_driver_data(struct i2c_client *i2c,
+ const struct i2c_device_id *id)
+{
+ if (IS_ENABLED(CONFIG_OF) && i2c->dev.of_node) {
+ const struct of_device_id *match;
+ match = of_match_node(max8997_pmic_dt_match, i2c->dev.of_node);
+ return (unsigned long)match->data;
+ }
+ return id->driver_data;
+}
+
+static int max8997_i2c_probe(struct i2c_client *i2c,
+ const struct i2c_device_id *id)
+{
+ struct max8997_dev *max8997;
+ struct max8997_platform_data *pdata = dev_get_platdata(&i2c->dev);
+ int ret = 0;
+
+ max8997 = devm_kzalloc(&i2c->dev, sizeof(struct max8997_dev),
+ GFP_KERNEL);
+ if (max8997 == NULL)
+ return -ENOMEM;
+
+ i2c_set_clientdata(i2c, max8997);
+ max8997->dev = &i2c->dev;
+ max8997->i2c = i2c;
+ max8997->type = max8997_i2c_get_driver_data(i2c, id);
+ max8997->irq = i2c->irq;
+
+ if (IS_ENABLED(CONFIG_OF) && max8997->dev->of_node) {
+ pdata = max8997_i2c_parse_dt_pdata(max8997->dev);
+ if (IS_ERR(pdata))
+ return PTR_ERR(pdata);
+ }
+
+ if (!pdata)
+ return ret;
+
+ max8997->pdata = pdata;
+ max8997->ono = pdata->ono;
+
+ mutex_init(&max8997->iolock);
+
+ max8997->rtc = i2c_new_dummy(i2c->adapter, I2C_ADDR_RTC);
+ if (!max8997->rtc) {
+ dev_err(max8997->dev, "Failed to allocate I2C device for RTC\n");
+ return -ENODEV;
+ }
+ i2c_set_clientdata(max8997->rtc, max8997);
+
+ max8997->haptic = i2c_new_dummy(i2c->adapter, I2C_ADDR_HAPTIC);
+ if (!max8997->haptic) {
+ dev_err(max8997->dev, "Failed to allocate I2C device for Haptic\n");
+ ret = -ENODEV;
+ goto err_i2c_haptic;
+ }
+ i2c_set_clientdata(max8997->haptic, max8997);
+
+ max8997->muic = i2c_new_dummy(i2c->adapter, I2C_ADDR_MUIC);
+ if (!max8997->muic) {
+ dev_err(max8997->dev, "Failed to allocate I2C device for MUIC\n");
+ ret = -ENODEV;
+ goto err_i2c_muic;
+ }
+ i2c_set_clientdata(max8997->muic, max8997);
+
+ pm_runtime_set_active(max8997->dev);
+
+ max8997_irq_init(max8997);
+
+ ret = mfd_add_devices(max8997->dev, -1, max8997_devs,
+ ARRAY_SIZE(max8997_devs),
+ NULL, 0, NULL);
+ if (ret < 0) {
+ dev_err(max8997->dev, "failed to add MFD devices %d\n", ret);
+ goto err_mfd;
+ }
+
+ /*
+ * TODO: enable others (flash, muic, rtc, battery, ...) and
+ * check the return value
+ */
+
+ /* MAX8997 has a power button input. */
+ device_init_wakeup(max8997->dev, pdata->wakeup);
+
+ return ret;
+
+err_mfd:
+ mfd_remove_devices(max8997->dev);
+ i2c_unregister_device(max8997->muic);
+err_i2c_muic:
+ i2c_unregister_device(max8997->haptic);
+err_i2c_haptic:
+ i2c_unregister_device(max8997->rtc);
+ return ret;
+}
+
+static int max8997_i2c_remove(struct i2c_client *i2c)
+{
+ struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
+
+ mfd_remove_devices(max8997->dev);
+ i2c_unregister_device(max8997->muic);
+ i2c_unregister_device(max8997->haptic);
+ i2c_unregister_device(max8997->rtc);
+
+ return 0;
+}
+
+static const struct i2c_device_id max8997_i2c_id[] = {
+ { "max8997", TYPE_MAX8997 },
+ { "max8966", TYPE_MAX8966 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, max8998_i2c_id);
+
+static u8 max8997_dumpaddr_pmic[] = {
+ MAX8997_REG_INT1MSK,
+ MAX8997_REG_INT2MSK,
+ MAX8997_REG_INT3MSK,
+ MAX8997_REG_INT4MSK,
+ MAX8997_REG_MAINCON1,
+ MAX8997_REG_MAINCON2,
+ MAX8997_REG_BUCKRAMP,
+ MAX8997_REG_BUCK1CTRL,
+ MAX8997_REG_BUCK1DVS1,
+ MAX8997_REG_BUCK1DVS2,
+ MAX8997_REG_BUCK1DVS3,
+ MAX8997_REG_BUCK1DVS4,
+ MAX8997_REG_BUCK1DVS5,
+ MAX8997_REG_BUCK1DVS6,
+ MAX8997_REG_BUCK1DVS7,
+ MAX8997_REG_BUCK1DVS8,
+ MAX8997_REG_BUCK2CTRL,
+ MAX8997_REG_BUCK2DVS1,
+ MAX8997_REG_BUCK2DVS2,
+ MAX8997_REG_BUCK2DVS3,
+ MAX8997_REG_BUCK2DVS4,
+ MAX8997_REG_BUCK2DVS5,
+ MAX8997_REG_BUCK2DVS6,
+ MAX8997_REG_BUCK2DVS7,
+ MAX8997_REG_BUCK2DVS8,
+ MAX8997_REG_BUCK3CTRL,
+ MAX8997_REG_BUCK3DVS,
+ MAX8997_REG_BUCK4CTRL,
+ MAX8997_REG_BUCK4DVS,
+ MAX8997_REG_BUCK5CTRL,
+ MAX8997_REG_BUCK5DVS1,
+ MAX8997_REG_BUCK5DVS2,
+ MAX8997_REG_BUCK5DVS3,
+ MAX8997_REG_BUCK5DVS4,
+ MAX8997_REG_BUCK5DVS5,
+ MAX8997_REG_BUCK5DVS6,
+ MAX8997_REG_BUCK5DVS7,
+ MAX8997_REG_BUCK5DVS8,
+ MAX8997_REG_BUCK6CTRL,
+ MAX8997_REG_BUCK6BPSKIPCTRL,
+ MAX8997_REG_BUCK7CTRL,
+ MAX8997_REG_BUCK7DVS,
+ MAX8997_REG_LDO1CTRL,
+ MAX8997_REG_LDO2CTRL,
+ MAX8997_REG_LDO3CTRL,
+ MAX8997_REG_LDO4CTRL,
+ MAX8997_REG_LDO5CTRL,
+ MAX8997_REG_LDO6CTRL,
+ MAX8997_REG_LDO7CTRL,
+ MAX8997_REG_LDO8CTRL,
+ MAX8997_REG_LDO9CTRL,
+ MAX8997_REG_LDO10CTRL,
+ MAX8997_REG_LDO11CTRL,
+ MAX8997_REG_LDO12CTRL,
+ MAX8997_REG_LDO13CTRL,
+ MAX8997_REG_LDO14CTRL,
+ MAX8997_REG_LDO15CTRL,
+ MAX8997_REG_LDO16CTRL,
+ MAX8997_REG_LDO17CTRL,
+ MAX8997_REG_LDO18CTRL,
+ MAX8997_REG_LDO21CTRL,
+ MAX8997_REG_MBCCTRL1,
+ MAX8997_REG_MBCCTRL2,
+ MAX8997_REG_MBCCTRL3,
+ MAX8997_REG_MBCCTRL4,
+ MAX8997_REG_MBCCTRL5,
+ MAX8997_REG_MBCCTRL6,
+ MAX8997_REG_OTPCGHCVS,
+ MAX8997_REG_SAFEOUTCTRL,
+ MAX8997_REG_LBCNFG1,
+ MAX8997_REG_LBCNFG2,
+ MAX8997_REG_BBCCTRL,
+
+ MAX8997_REG_FLASH1_CUR,
+ MAX8997_REG_FLASH2_CUR,
+ MAX8997_REG_MOVIE_CUR,
+ MAX8997_REG_GSMB_CUR,
+ MAX8997_REG_BOOST_CNTL,
+ MAX8997_REG_LEN_CNTL,
+ MAX8997_REG_FLASH_CNTL,
+ MAX8997_REG_WDT_CNTL,
+ MAX8997_REG_MAXFLASH1,
+ MAX8997_REG_MAXFLASH2,
+ MAX8997_REG_FLASHSTATUSMASK,
+
+ MAX8997_REG_GPIOCNTL1,
+ MAX8997_REG_GPIOCNTL2,
+ MAX8997_REG_GPIOCNTL3,
+ MAX8997_REG_GPIOCNTL4,
+ MAX8997_REG_GPIOCNTL5,
+ MAX8997_REG_GPIOCNTL6,
+ MAX8997_REG_GPIOCNTL7,
+ MAX8997_REG_GPIOCNTL8,
+ MAX8997_REG_GPIOCNTL9,
+ MAX8997_REG_GPIOCNTL10,
+ MAX8997_REG_GPIOCNTL11,
+ MAX8997_REG_GPIOCNTL12,
+
+ MAX8997_REG_LDO1CONFIG,
+ MAX8997_REG_LDO2CONFIG,
+ MAX8997_REG_LDO3CONFIG,
+ MAX8997_REG_LDO4CONFIG,
+ MAX8997_REG_LDO5CONFIG,
+ MAX8997_REG_LDO6CONFIG,
+ MAX8997_REG_LDO7CONFIG,
+ MAX8997_REG_LDO8CONFIG,
+ MAX8997_REG_LDO9CONFIG,
+ MAX8997_REG_LDO10CONFIG,
+ MAX8997_REG_LDO11CONFIG,
+ MAX8997_REG_LDO12CONFIG,
+ MAX8997_REG_LDO13CONFIG,
+ MAX8997_REG_LDO14CONFIG,
+ MAX8997_REG_LDO15CONFIG,
+ MAX8997_REG_LDO16CONFIG,
+ MAX8997_REG_LDO17CONFIG,
+ MAX8997_REG_LDO18CONFIG,
+ MAX8997_REG_LDO21CONFIG,
+
+ MAX8997_REG_DVSOKTIMER1,
+ MAX8997_REG_DVSOKTIMER2,
+ MAX8997_REG_DVSOKTIMER4,
+ MAX8997_REG_DVSOKTIMER5,
+};
+
+static u8 max8997_dumpaddr_muic[] = {
+ MAX8997_MUIC_REG_INTMASK1,
+ MAX8997_MUIC_REG_INTMASK2,
+ MAX8997_MUIC_REG_INTMASK3,
+ MAX8997_MUIC_REG_CDETCTRL,
+ MAX8997_MUIC_REG_CONTROL1,
+ MAX8997_MUIC_REG_CONTROL2,
+ MAX8997_MUIC_REG_CONTROL3,
+};
+
+static u8 max8997_dumpaddr_haptic[] = {
+ MAX8997_HAPTIC_REG_CONF1,
+ MAX8997_HAPTIC_REG_CONF2,
+ MAX8997_HAPTIC_REG_DRVCONF,
+ MAX8997_HAPTIC_REG_CYCLECONF1,
+ MAX8997_HAPTIC_REG_CYCLECONF2,
+ MAX8997_HAPTIC_REG_SIGCONF1,
+ MAX8997_HAPTIC_REG_SIGCONF2,
+ MAX8997_HAPTIC_REG_SIGCONF3,
+ MAX8997_HAPTIC_REG_SIGCONF4,
+ MAX8997_HAPTIC_REG_SIGDC1,
+ MAX8997_HAPTIC_REG_SIGDC2,
+ MAX8997_HAPTIC_REG_SIGPWMDC1,
+ MAX8997_HAPTIC_REG_SIGPWMDC2,
+ MAX8997_HAPTIC_REG_SIGPWMDC3,
+ MAX8997_HAPTIC_REG_SIGPWMDC4,
+};
+
+static int max8997_freeze(struct device *dev)
+{
+ struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
+ struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_pmic); i++)
+ max8997_read_reg(i2c, max8997_dumpaddr_pmic[i],
+ &max8997->reg_dump[i]);
+
+ for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_muic); i++)
+ max8997_read_reg(i2c, max8997_dumpaddr_muic[i],
+ &max8997->reg_dump[i + MAX8997_REG_PMIC_END]);
+
+ for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_haptic); i++)
+ max8997_read_reg(i2c, max8997_dumpaddr_haptic[i],
+ &max8997->reg_dump[i + MAX8997_REG_PMIC_END +
+ MAX8997_MUIC_REG_END]);
+
+ return 0;
+}
+
+static int max8997_restore(struct device *dev)
+{
+ struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
+ struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_pmic); i++)
+ max8997_write_reg(i2c, max8997_dumpaddr_pmic[i],
+ max8997->reg_dump[i]);
+
+ for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_muic); i++)
+ max8997_write_reg(i2c, max8997_dumpaddr_muic[i],
+ max8997->reg_dump[i + MAX8997_REG_PMIC_END]);
+
+ for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_haptic); i++)
+ max8997_write_reg(i2c, max8997_dumpaddr_haptic[i],
+ max8997->reg_dump[i + MAX8997_REG_PMIC_END +
+ MAX8997_MUIC_REG_END]);
+
+ return 0;
+}
+
+static int max8997_suspend(struct device *dev)
+{
+ struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
+ struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
+
+ if (device_may_wakeup(dev))
+ irq_set_irq_wake(max8997->irq, 1);
+ return 0;
+}
+
+static int max8997_resume(struct device *dev)
+{
+ struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
+ struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
+
+ if (device_may_wakeup(dev))
+ irq_set_irq_wake(max8997->irq, 0);
+ return max8997_irq_resume(max8997);
+}
+
+static const struct dev_pm_ops max8997_pm = {
+ .suspend = max8997_suspend,
+ .resume = max8997_resume,
+ .freeze = max8997_freeze,
+ .restore = max8997_restore,
+};
+
+static struct i2c_driver max8997_i2c_driver = {
+ .driver = {
+ .name = "max8997",
+ .owner = THIS_MODULE,
+ .pm = &max8997_pm,
+ .of_match_table = of_match_ptr(max8997_pmic_dt_match),
+ },
+ .probe = max8997_i2c_probe,
+ .remove = max8997_i2c_remove,
+ .id_table = max8997_i2c_id,
+};
+
+static int __init max8997_i2c_init(void)
+{
+ return i2c_add_driver(&max8997_i2c_driver);
+}
+/* init early so consumer devices can complete system boot */
+subsys_initcall(max8997_i2c_init);
+
+static void __exit max8997_i2c_exit(void)
+{
+ i2c_del_driver(&max8997_i2c_driver);
+}
+module_exit(max8997_i2c_exit);
+
+MODULE_DESCRIPTION("MAXIM 8997 multi-function core driver");
+MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>");
+MODULE_LICENSE("GPL");
Code Review / kvmfornfv.git / blobdiff