0848c94fb4
Currently the MFD core supports remapping MFD cell interrupts using an irqdomain but only if the MFD is being instantiated using device tree and only if the device tree bindings use the pattern of registering IPs in the device tree with compatible properties. This will be actively harmful for drivers which support non-DT platforms and use this pattern for their DT bindings as it will mean that the core will silently change remapping behaviour and it is also limiting for drivers which don't do DT with this particular pattern. There is also a potential fragility if there are interrupts not associated with MFD cells and all the cells are omitted from the device tree for some reason. Instead change the code to take an IRQ domain as an optional argument, allowing drivers to take the decision about the parent domain for their interrupts. The one current user of this feature is ab8500-core, it has the domain lookup pushed out into the driver. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
249 lines
6.1 KiB
C
249 lines
6.1 KiB
C
/*
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* max77693.c - mfd core driver for the MAX 77693
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*
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* Copyright (C) 2012 Samsung Electronics
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* SangYoung Son <hello.son@smasung.com>
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*
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* This program is not provided / owned by Maxim Integrated Products.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* This driver is based on max8997.c
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*/
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/i2c.h>
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#include <linux/err.h>
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#include <linux/interrupt.h>
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#include <linux/pm_runtime.h>
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#include <linux/mutex.h>
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#include <linux/mfd/core.h>
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#include <linux/mfd/max77693.h>
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#include <linux/mfd/max77693-private.h>
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#include <linux/regulator/machine.h>
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#include <linux/regmap.h>
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#define I2C_ADDR_PMIC (0xCC >> 1) /* Charger, Flash LED */
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#define I2C_ADDR_MUIC (0x4A >> 1)
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#define I2C_ADDR_HAPTIC (0x90 >> 1)
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static struct mfd_cell max77693_devs[] = {
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{ .name = "max77693-pmic", },
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{ .name = "max77693-charger", },
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{ .name = "max77693-flash", },
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{ .name = "max77693-muic", },
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{ .name = "max77693-haptic", },
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};
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int max77693_read_reg(struct regmap *map, u8 reg, u8 *dest)
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{
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unsigned int val;
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int ret;
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ret = regmap_read(map, reg, &val);
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*dest = val;
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return ret;
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}
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EXPORT_SYMBOL_GPL(max77693_read_reg);
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int max77693_bulk_read(struct regmap *map, u8 reg, int count, u8 *buf)
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{
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int ret;
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ret = regmap_bulk_read(map, reg, buf, count);
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return ret;
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}
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EXPORT_SYMBOL_GPL(max77693_bulk_read);
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int max77693_write_reg(struct regmap *map, u8 reg, u8 value)
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{
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int ret;
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ret = regmap_write(map, reg, value);
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return ret;
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}
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EXPORT_SYMBOL_GPL(max77693_write_reg);
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int max77693_bulk_write(struct regmap *map, u8 reg, int count, u8 *buf)
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{
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int ret;
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ret = regmap_bulk_write(map, reg, buf, count);
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return ret;
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}
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EXPORT_SYMBOL_GPL(max77693_bulk_write);
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int max77693_update_reg(struct regmap *map, u8 reg, u8 val, u8 mask)
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{
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int ret;
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ret = regmap_update_bits(map, reg, mask, val);
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return ret;
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}
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EXPORT_SYMBOL_GPL(max77693_update_reg);
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static const struct regmap_config max77693_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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.max_register = MAX77693_PMIC_REG_END,
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};
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static int max77693_i2c_probe(struct i2c_client *i2c,
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const struct i2c_device_id *id)
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{
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struct max77693_dev *max77693;
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struct max77693_platform_data *pdata = i2c->dev.platform_data;
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u8 reg_data;
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int ret = 0;
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max77693 = devm_kzalloc(&i2c->dev,
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sizeof(struct max77693_dev), GFP_KERNEL);
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if (max77693 == NULL)
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return -ENOMEM;
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max77693->regmap = devm_regmap_init_i2c(i2c, &max77693_regmap_config);
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if (IS_ERR(max77693->regmap)) {
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ret = PTR_ERR(max77693->regmap);
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dev_err(max77693->dev,"failed to allocate register map: %d\n",
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ret);
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goto err_regmap;
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}
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i2c_set_clientdata(i2c, max77693);
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max77693->dev = &i2c->dev;
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max77693->i2c = i2c;
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max77693->irq = i2c->irq;
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max77693->type = id->driver_data;
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if (!pdata)
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goto err_regmap;
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max77693->wakeup = pdata->wakeup;
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if (max77693_read_reg(max77693->regmap,
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MAX77693_PMIC_REG_PMIC_ID2, ®_data) < 0) {
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dev_err(max77693->dev, "device not found on this channel\n");
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ret = -ENODEV;
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goto err_regmap;
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} else
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dev_info(max77693->dev, "device ID: 0x%x\n", reg_data);
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max77693->muic = i2c_new_dummy(i2c->adapter, I2C_ADDR_MUIC);
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i2c_set_clientdata(max77693->muic, max77693);
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max77693->haptic = i2c_new_dummy(i2c->adapter, I2C_ADDR_HAPTIC);
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i2c_set_clientdata(max77693->haptic, max77693);
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ret = max77693_irq_init(max77693);
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if (ret < 0)
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goto err_irq;
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pm_runtime_set_active(max77693->dev);
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ret = mfd_add_devices(max77693->dev, -1, max77693_devs,
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ARRAY_SIZE(max77693_devs), NULL, 0, NULL);
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if (ret < 0)
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goto err_mfd;
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device_init_wakeup(max77693->dev, pdata->wakeup);
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return ret;
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err_mfd:
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max77693_irq_exit(max77693);
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err_irq:
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i2c_unregister_device(max77693->muic);
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i2c_unregister_device(max77693->haptic);
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err_regmap:
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return ret;
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}
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static int max77693_i2c_remove(struct i2c_client *i2c)
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{
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struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
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mfd_remove_devices(max77693->dev);
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max77693_irq_exit(max77693);
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i2c_unregister_device(max77693->muic);
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i2c_unregister_device(max77693->haptic);
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return 0;
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}
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static const struct i2c_device_id max77693_i2c_id[] = {
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{ "max77693", TYPE_MAX77693 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, max77693_i2c_id);
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static int max77693_suspend(struct device *dev)
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{
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struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
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struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
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if (device_may_wakeup(dev))
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irq_set_irq_wake(max77693->irq, 1);
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return 0;
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}
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static int max77693_resume(struct device *dev)
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{
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struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
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struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
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if (device_may_wakeup(dev))
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irq_set_irq_wake(max77693->irq, 0);
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return max77693_irq_resume(max77693);
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}
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static const struct dev_pm_ops max77693_pm = {
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.suspend = max77693_suspend,
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.resume = max77693_resume,
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};
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static struct i2c_driver max77693_i2c_driver = {
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.driver = {
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.name = "max77693",
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.owner = THIS_MODULE,
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.pm = &max77693_pm,
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},
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.probe = max77693_i2c_probe,
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.remove = max77693_i2c_remove,
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.id_table = max77693_i2c_id,
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};
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static int __init max77693_i2c_init(void)
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{
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return i2c_add_driver(&max77693_i2c_driver);
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}
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/* init early so consumer devices can complete system boot */
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subsys_initcall(max77693_i2c_init);
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static void __exit max77693_i2c_exit(void)
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{
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i2c_del_driver(&max77693_i2c_driver);
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}
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module_exit(max77693_i2c_exit);
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MODULE_DESCRIPTION("MAXIM 77693 multi-function core driver");
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MODULE_AUTHOR("SangYoung, Son <hello.son@samsung.com>");
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MODULE_LICENSE("GPL");
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