--- /dev/null
+/*
+ * max77693.c - mfd core driver for the MAX 77693
+ *
+ * Copyright (C) 2012 Samsung Electronics
+ * SangYoung Son <hello.son@smasung.com>
+ *
+ * This program is not provided / owned by Maxim Integrated Products.
+ *
+ * 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.c
+ */
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/err.h>
+#include <linux/interrupt.h>
+#include <linux/of.h>
+#include <linux/pm_runtime.h>
+#include <linux/mutex.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/max77693.h>
+#include <linux/mfd/max77693-private.h>
+#include <linux/regulator/machine.h>
+#include <linux/regmap.h>
+
+#define I2C_ADDR_PMIC (0xCC >> 1) /* Charger, Flash LED */
+#define I2C_ADDR_MUIC (0x4A >> 1)
+#define I2C_ADDR_HAPTIC (0x90 >> 1)
+
+static const struct mfd_cell max77693_devs[] = {
+ { .name = "max77693-pmic", },
+ {
+ .name = "max77693-charger",
+ .of_compatible = "maxim,max77693-charger",
+ },
+ { .name = "max77693-muic", },
+ {
+ .name = "max77693-haptic",
+ .of_compatible = "maxim,max77693-haptic",
+ },
+ {
+ .name = "max77693-led",
+ .of_compatible = "maxim,max77693-led",
+ },
+};
+
+static const struct regmap_config max77693_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = MAX77693_PMIC_REG_END,
+};
+
+static const struct regmap_irq max77693_led_irqs[] = {
+ { .mask = LED_IRQ_FLED2_OPEN, },
+ { .mask = LED_IRQ_FLED2_SHORT, },
+ { .mask = LED_IRQ_FLED1_OPEN, },
+ { .mask = LED_IRQ_FLED1_SHORT, },
+ { .mask = LED_IRQ_MAX_FLASH, },
+};
+
+static const struct regmap_irq_chip max77693_led_irq_chip = {
+ .name = "max77693-led",
+ .status_base = MAX77693_LED_REG_FLASH_INT,
+ .mask_base = MAX77693_LED_REG_FLASH_INT_MASK,
+ .mask_invert = false,
+ .num_regs = 1,
+ .irqs = max77693_led_irqs,
+ .num_irqs = ARRAY_SIZE(max77693_led_irqs),
+};
+
+static const struct regmap_irq max77693_topsys_irqs[] = {
+ { .mask = TOPSYS_IRQ_T120C_INT, },
+ { .mask = TOPSYS_IRQ_T140C_INT, },
+ { .mask = TOPSYS_IRQ_LOWSYS_INT, },
+};
+
+static const struct regmap_irq_chip max77693_topsys_irq_chip = {
+ .name = "max77693-topsys",
+ .status_base = MAX77693_PMIC_REG_TOPSYS_INT,
+ .mask_base = MAX77693_PMIC_REG_TOPSYS_INT_MASK,
+ .mask_invert = false,
+ .num_regs = 1,
+ .irqs = max77693_topsys_irqs,
+ .num_irqs = ARRAY_SIZE(max77693_topsys_irqs),
+};
+
+static const struct regmap_irq max77693_charger_irqs[] = {
+ { .mask = CHG_IRQ_BYP_I, },
+ { .mask = CHG_IRQ_THM_I, },
+ { .mask = CHG_IRQ_BAT_I, },
+ { .mask = CHG_IRQ_CHG_I, },
+ { .mask = CHG_IRQ_CHGIN_I, },
+};
+
+static const struct regmap_irq_chip max77693_charger_irq_chip = {
+ .name = "max77693-charger",
+ .status_base = MAX77693_CHG_REG_CHG_INT,
+ .mask_base = MAX77693_CHG_REG_CHG_INT_MASK,
+ .mask_invert = false,
+ .num_regs = 1,
+ .irqs = max77693_charger_irqs,
+ .num_irqs = ARRAY_SIZE(max77693_charger_irqs),
+};
+
+static const struct regmap_config max77693_regmap_muic_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = MAX77693_MUIC_REG_END,
+};
+
+static const struct regmap_irq max77693_muic_irqs[] = {
+ { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC, },
+ { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC_LOW, },
+ { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC_ERR, },
+ { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC1K, },
+
+ { .reg_offset = 1, .mask = MUIC_IRQ_INT2_CHGTYP, },
+ { .reg_offset = 1, .mask = MUIC_IRQ_INT2_CHGDETREUN, },
+ { .reg_offset = 1, .mask = MUIC_IRQ_INT2_DCDTMR, },
+ { .reg_offset = 1, .mask = MUIC_IRQ_INT2_DXOVP, },
+ { .reg_offset = 1, .mask = MUIC_IRQ_INT2_VBVOLT, },
+ { .reg_offset = 1, .mask = MUIC_IRQ_INT2_VIDRM, },
+
+ { .reg_offset = 2, .mask = MUIC_IRQ_INT3_EOC, },
+ { .reg_offset = 2, .mask = MUIC_IRQ_INT3_CGMBC, },
+ { .reg_offset = 2, .mask = MUIC_IRQ_INT3_OVP, },
+ { .reg_offset = 2, .mask = MUIC_IRQ_INT3_MBCCHG_ERR, },
+ { .reg_offset = 2, .mask = MUIC_IRQ_INT3_CHG_ENABLED, },
+ { .reg_offset = 2, .mask = MUIC_IRQ_INT3_BAT_DET, },
+};
+
+static const struct regmap_irq_chip max77693_muic_irq_chip = {
+ .name = "max77693-muic",
+ .status_base = MAX77693_MUIC_REG_INT1,
+ .mask_base = MAX77693_MUIC_REG_INTMASK1,
+ .mask_invert = true,
+ .num_regs = 3,
+ .irqs = max77693_muic_irqs,
+ .num_irqs = ARRAY_SIZE(max77693_muic_irqs),
+};
+
+static const struct regmap_config max77693_regmap_haptic_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = MAX77693_HAPTIC_REG_END,
+};
+
+static int max77693_i2c_probe(struct i2c_client *i2c,
+ const struct i2c_device_id *id)
+{
+ struct max77693_dev *max77693;
+ unsigned int reg_data;
+ int ret = 0;
+
+ max77693 = devm_kzalloc(&i2c->dev,
+ sizeof(struct max77693_dev), GFP_KERNEL);
+ if (max77693 == NULL)
+ return -ENOMEM;
+
+ i2c_set_clientdata(i2c, max77693);
+ max77693->dev = &i2c->dev;
+ max77693->i2c = i2c;
+ max77693->irq = i2c->irq;
+ max77693->type = id->driver_data;
+
+ max77693->regmap = devm_regmap_init_i2c(i2c, &max77693_regmap_config);
+ if (IS_ERR(max77693->regmap)) {
+ ret = PTR_ERR(max77693->regmap);
+ dev_err(max77693->dev, "failed to allocate register map: %d\n",
+ ret);
+ return ret;
+ }
+
+ ret = regmap_read(max77693->regmap, MAX77693_PMIC_REG_PMIC_ID2,
+ ®_data);
+ if (ret < 0) {
+ dev_err(max77693->dev, "device not found on this channel\n");
+ return ret;
+ } else
+ dev_info(max77693->dev, "device ID: 0x%x\n", reg_data);
+
+ max77693->muic = i2c_new_dummy(i2c->adapter, I2C_ADDR_MUIC);
+ if (!max77693->muic) {
+ dev_err(max77693->dev, "Failed to allocate I2C device for MUIC\n");
+ return -ENODEV;
+ }
+ i2c_set_clientdata(max77693->muic, max77693);
+
+ max77693->haptic = i2c_new_dummy(i2c->adapter, I2C_ADDR_HAPTIC);
+ if (!max77693->haptic) {
+ dev_err(max77693->dev, "Failed to allocate I2C device for Haptic\n");
+ ret = -ENODEV;
+ goto err_i2c_haptic;
+ }
+ i2c_set_clientdata(max77693->haptic, max77693);
+
+ max77693->regmap_haptic = devm_regmap_init_i2c(max77693->haptic,
+ &max77693_regmap_haptic_config);
+ if (IS_ERR(max77693->regmap_haptic)) {
+ ret = PTR_ERR(max77693->regmap_haptic);
+ dev_err(max77693->dev,
+ "failed to initialize haptic register map: %d\n", ret);
+ goto err_regmap;
+ }
+
+ /*
+ * Initialize register map for MUIC device because use regmap-muic
+ * instance of MUIC device when irq of max77693 is initialized
+ * before call max77693-muic probe() function.
+ */
+ max77693->regmap_muic = devm_regmap_init_i2c(max77693->muic,
+ &max77693_regmap_muic_config);
+ if (IS_ERR(max77693->regmap_muic)) {
+ ret = PTR_ERR(max77693->regmap_muic);
+ dev_err(max77693->dev,
+ "failed to allocate register map: %d\n", ret);
+ goto err_regmap;
+ }
+
+ ret = regmap_add_irq_chip(max77693->regmap, max77693->irq,
+ IRQF_ONESHOT | IRQF_SHARED |
+ IRQF_TRIGGER_FALLING, 0,
+ &max77693_led_irq_chip,
+ &max77693->irq_data_led);
+ if (ret) {
+ dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);
+ goto err_regmap;
+ }
+
+ ret = regmap_add_irq_chip(max77693->regmap, max77693->irq,
+ IRQF_ONESHOT | IRQF_SHARED |
+ IRQF_TRIGGER_FALLING, 0,
+ &max77693_topsys_irq_chip,
+ &max77693->irq_data_topsys);
+ if (ret) {
+ dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);
+ goto err_irq_topsys;
+ }
+
+ ret = regmap_add_irq_chip(max77693->regmap, max77693->irq,
+ IRQF_ONESHOT | IRQF_SHARED |
+ IRQF_TRIGGER_FALLING, 0,
+ &max77693_charger_irq_chip,
+ &max77693->irq_data_charger);
+ if (ret) {
+ dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);
+ goto err_irq_charger;
+ }
+
+ ret = regmap_add_irq_chip(max77693->regmap_muic, max77693->irq,
+ IRQF_ONESHOT | IRQF_SHARED |
+ IRQF_TRIGGER_FALLING, 0,
+ &max77693_muic_irq_chip,
+ &max77693->irq_data_muic);
+ if (ret) {
+ dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);
+ goto err_irq_muic;
+ }
+
+ /* Unmask interrupts from all blocks in interrupt source register */
+ ret = regmap_update_bits(max77693->regmap,
+ MAX77693_PMIC_REG_INTSRC_MASK,
+ SRC_IRQ_ALL, (unsigned int)~SRC_IRQ_ALL);
+ if (ret < 0) {
+ dev_err(max77693->dev,
+ "Could not unmask interrupts in INTSRC: %d\n",
+ ret);
+ goto err_intsrc;
+ }
+
+ pm_runtime_set_active(max77693->dev);
+
+ ret = mfd_add_devices(max77693->dev, -1, max77693_devs,
+ ARRAY_SIZE(max77693_devs), NULL, 0, NULL);
+ if (ret < 0)
+ goto err_mfd;
+
+ return ret;
+
+err_mfd:
+ mfd_remove_devices(max77693->dev);
+err_intsrc:
+ regmap_del_irq_chip(max77693->irq, max77693->irq_data_muic);
+err_irq_muic:
+ regmap_del_irq_chip(max77693->irq, max77693->irq_data_charger);
+err_irq_charger:
+ regmap_del_irq_chip(max77693->irq, max77693->irq_data_topsys);
+err_irq_topsys:
+ regmap_del_irq_chip(max77693->irq, max77693->irq_data_led);
+err_regmap:
+ i2c_unregister_device(max77693->haptic);
+err_i2c_haptic:
+ i2c_unregister_device(max77693->muic);
+ return ret;
+}
+
+static int max77693_i2c_remove(struct i2c_client *i2c)
+{
+ struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
+
+ mfd_remove_devices(max77693->dev);
+
+ regmap_del_irq_chip(max77693->irq, max77693->irq_data_muic);
+ regmap_del_irq_chip(max77693->irq, max77693->irq_data_charger);
+ regmap_del_irq_chip(max77693->irq, max77693->irq_data_topsys);
+ regmap_del_irq_chip(max77693->irq, max77693->irq_data_led);
+
+ i2c_unregister_device(max77693->muic);
+ i2c_unregister_device(max77693->haptic);
+
+ return 0;
+}
+
+static const struct i2c_device_id max77693_i2c_id[] = {
+ { "max77693", TYPE_MAX77693 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, max77693_i2c_id);
+
+static int max77693_suspend(struct device *dev)
+{
+ struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
+ struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
+
+ if (device_may_wakeup(dev)) {
+ enable_irq_wake(max77693->irq);
+ disable_irq(max77693->irq);
+ }
+
+ return 0;
+}
+
+static int max77693_resume(struct device *dev)
+{
+ struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
+ struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
+
+ if (device_may_wakeup(dev)) {
+ disable_irq_wake(max77693->irq);
+ enable_irq(max77693->irq);
+ }
+
+ return 0;
+}
+
+static const struct dev_pm_ops max77693_pm = {
+ .suspend = max77693_suspend,
+ .resume = max77693_resume,
+};
+
+#ifdef CONFIG_OF
+static const struct of_device_id max77693_dt_match[] = {
+ { .compatible = "maxim,max77693" },
+ {},
+};
+#endif
+
+static struct i2c_driver max77693_i2c_driver = {
+ .driver = {
+ .name = "max77693",
+ .owner = THIS_MODULE,
+ .pm = &max77693_pm,
+ .of_match_table = of_match_ptr(max77693_dt_match),
+ },
+ .probe = max77693_i2c_probe,
+ .remove = max77693_i2c_remove,
+ .id_table = max77693_i2c_id,
+};
+
+static int __init max77693_i2c_init(void)
+{
+ return i2c_add_driver(&max77693_i2c_driver);
+}
+/* init early so consumer devices can complete system boot */
+subsys_initcall(max77693_i2c_init);
+
+static void __exit max77693_i2c_exit(void)
+{
+ i2c_del_driver(&max77693_i2c_driver);
+}
+module_exit(max77693_i2c_exit);
+
+MODULE_DESCRIPTION("MAXIM 77693 multi-function core driver");
+MODULE_AUTHOR("SangYoung, Son <hello.son@samsung.com>");
+MODULE_LICENSE("GPL");
Code Review / kvmfornfv.git / blobdiff