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author | 2015-08-04 12:17:53 -0700 | |
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committer | 2015-08-04 15:44:42 -0700 | |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/drivers/mfd/max77686.c | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/drivers/mfd/max77686.c')
-rw-r--r-- | kernel/drivers/mfd/max77686.c | 418 |
1 files changed, 418 insertions, 0 deletions
diff --git a/kernel/drivers/mfd/max77686.c b/kernel/drivers/mfd/max77686.c new file mode 100644 index 000000000..760d08d79 --- /dev/null +++ b/kernel/drivers/mfd/max77686.c @@ -0,0 +1,418 @@ +/* + * max77686.c - mfd core driver for the Maxim 77686/802 + * + * Copyright (C) 2012 Samsung Electronics + * Chiwoong Byun <woong.byun@smasung.com> + * Jonghwa Lee <jonghwa3.lee@samsung.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 max8997.c + */ + +#include <linux/export.h> +#include <linux/slab.h> +#include <linux/i2c.h> +#include <linux/irq.h> +#include <linux/interrupt.h> +#include <linux/pm_runtime.h> +#include <linux/module.h> +#include <linux/mfd/core.h> +#include <linux/mfd/max77686.h> +#include <linux/mfd/max77686-private.h> +#include <linux/err.h> +#include <linux/of.h> + +#define I2C_ADDR_RTC (0x0C >> 1) + +static const struct mfd_cell max77686_devs[] = { + { .name = "max77686-pmic", }, + { .name = "max77686-rtc", }, + { .name = "max77686-clk", }, +}; + +static const struct mfd_cell max77802_devs[] = { + { .name = "max77802-pmic", }, + { .name = "max77802-clk", }, + { .name = "max77802-rtc", }, +}; + +static bool max77802_pmic_is_accessible_reg(struct device *dev, + unsigned int reg) +{ + return reg < MAX77802_REG_PMIC_END; +} + +static bool max77802_rtc_is_accessible_reg(struct device *dev, + unsigned int reg) +{ + return (reg >= MAX77802_RTC_INT && reg < MAX77802_RTC_END); +} + +static bool max77802_is_accessible_reg(struct device *dev, unsigned int reg) +{ + return (max77802_pmic_is_accessible_reg(dev, reg) || + max77802_rtc_is_accessible_reg(dev, reg)); +} + +static bool max77802_pmic_is_precious_reg(struct device *dev, unsigned int reg) +{ + return (reg == MAX77802_REG_INTSRC || reg == MAX77802_REG_INT1 || + reg == MAX77802_REG_INT2); +} + +static bool max77802_rtc_is_precious_reg(struct device *dev, unsigned int reg) +{ + return (reg == MAX77802_RTC_INT || + reg == MAX77802_RTC_UPDATE0 || + reg == MAX77802_RTC_UPDATE1); +} + +static bool max77802_is_precious_reg(struct device *dev, unsigned int reg) +{ + return (max77802_pmic_is_precious_reg(dev, reg) || + max77802_rtc_is_precious_reg(dev, reg)); +} + +static bool max77802_pmic_is_volatile_reg(struct device *dev, unsigned int reg) +{ + return (max77802_is_precious_reg(dev, reg) || + reg == MAX77802_REG_STATUS1 || reg == MAX77802_REG_STATUS2 || + reg == MAX77802_REG_PWRON); +} + +static bool max77802_rtc_is_volatile_reg(struct device *dev, unsigned int reg) +{ + return (max77802_rtc_is_precious_reg(dev, reg) || + reg == MAX77802_RTC_SEC || + reg == MAX77802_RTC_MIN || + reg == MAX77802_RTC_HOUR || + reg == MAX77802_RTC_WEEKDAY || + reg == MAX77802_RTC_MONTH || + reg == MAX77802_RTC_YEAR || + reg == MAX77802_RTC_DATE); +} + +static bool max77802_is_volatile_reg(struct device *dev, unsigned int reg) +{ + return (max77802_pmic_is_volatile_reg(dev, reg) || + max77802_rtc_is_volatile_reg(dev, reg)); +} + +static const struct regmap_config max77686_regmap_config = { + .reg_bits = 8, + .val_bits = 8, +}; + +static const struct regmap_config max77686_rtc_regmap_config = { + .reg_bits = 8, + .val_bits = 8, +}; + +static const struct regmap_config max77802_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .writeable_reg = max77802_is_accessible_reg, + .readable_reg = max77802_is_accessible_reg, + .precious_reg = max77802_is_precious_reg, + .volatile_reg = max77802_is_volatile_reg, + .name = "max77802-pmic", + .cache_type = REGCACHE_RBTREE, +}; + +static const struct regmap_irq max77686_irqs[] = { + /* INT1 interrupts */ + { .reg_offset = 0, .mask = MAX77686_INT1_PWRONF_MSK, }, + { .reg_offset = 0, .mask = MAX77686_INT1_PWRONR_MSK, }, + { .reg_offset = 0, .mask = MAX77686_INT1_JIGONBF_MSK, }, + { .reg_offset = 0, .mask = MAX77686_INT1_JIGONBR_MSK, }, + { .reg_offset = 0, .mask = MAX77686_INT1_ACOKBF_MSK, }, + { .reg_offset = 0, .mask = MAX77686_INT1_ACOKBR_MSK, }, + { .reg_offset = 0, .mask = MAX77686_INT1_ONKEY1S_MSK, }, + { .reg_offset = 0, .mask = MAX77686_INT1_MRSTB_MSK, }, + /* INT2 interrupts */ + { .reg_offset = 1, .mask = MAX77686_INT2_140C_MSK, }, + { .reg_offset = 1, .mask = MAX77686_INT2_120C_MSK, }, +}; + +static const struct regmap_irq_chip max77686_irq_chip = { + .name = "max77686-pmic", + .status_base = MAX77686_REG_INT1, + .mask_base = MAX77686_REG_INT1MSK, + .num_regs = 2, + .irqs = max77686_irqs, + .num_irqs = ARRAY_SIZE(max77686_irqs), +}; + +static const struct regmap_irq max77686_rtc_irqs[] = { + /* RTC interrupts */ + { .reg_offset = 0, .mask = MAX77686_RTCINT_RTC60S_MSK, }, + { .reg_offset = 0, .mask = MAX77686_RTCINT_RTCA1_MSK, }, + { .reg_offset = 0, .mask = MAX77686_RTCINT_RTCA2_MSK, }, + { .reg_offset = 0, .mask = MAX77686_RTCINT_SMPL_MSK, }, + { .reg_offset = 0, .mask = MAX77686_RTCINT_RTC1S_MSK, }, + { .reg_offset = 0, .mask = MAX77686_RTCINT_WTSR_MSK, }, +}; + +static const struct regmap_irq_chip max77686_rtc_irq_chip = { + .name = "max77686-rtc", + .status_base = MAX77686_RTC_INT, + .mask_base = MAX77686_RTC_INTM, + .num_regs = 1, + .irqs = max77686_rtc_irqs, + .num_irqs = ARRAY_SIZE(max77686_rtc_irqs), +}; + +static const struct regmap_irq_chip max77802_irq_chip = { + .name = "max77802-pmic", + .status_base = MAX77802_REG_INT1, + .mask_base = MAX77802_REG_INT1MSK, + .num_regs = 2, + .irqs = max77686_irqs, /* same masks as 77686 */ + .num_irqs = ARRAY_SIZE(max77686_irqs), +}; + +static const struct regmap_irq_chip max77802_rtc_irq_chip = { + .name = "max77802-rtc", + .status_base = MAX77802_RTC_INT, + .mask_base = MAX77802_RTC_INTM, + .num_regs = 1, + .irqs = max77686_rtc_irqs, /* same masks as 77686 */ + .num_irqs = ARRAY_SIZE(max77686_rtc_irqs), +}; + +static const struct of_device_id max77686_pmic_dt_match[] = { + { + .compatible = "maxim,max77686", + .data = (void *)TYPE_MAX77686, + }, + { + .compatible = "maxim,max77802", + .data = (void *)TYPE_MAX77802, + }, + { }, +}; + +static int max77686_i2c_probe(struct i2c_client *i2c, + const struct i2c_device_id *id) +{ + struct max77686_dev *max77686 = NULL; + const struct of_device_id *match; + unsigned int data; + int ret = 0; + const struct regmap_config *config; + const struct regmap_irq_chip *irq_chip; + const struct regmap_irq_chip *rtc_irq_chip; + struct regmap **rtc_regmap; + const struct mfd_cell *cells; + int n_devs; + + max77686 = devm_kzalloc(&i2c->dev, + sizeof(struct max77686_dev), GFP_KERNEL); + if (!max77686) + return -ENOMEM; + + if (i2c->dev.of_node) { + match = of_match_node(max77686_pmic_dt_match, i2c->dev.of_node); + if (!match) + return -EINVAL; + + max77686->type = (unsigned long)match->data; + } else + max77686->type = id->driver_data; + + i2c_set_clientdata(i2c, max77686); + max77686->dev = &i2c->dev; + max77686->i2c = i2c; + + max77686->irq = i2c->irq; + + if (max77686->type == TYPE_MAX77686) { + config = &max77686_regmap_config; + irq_chip = &max77686_irq_chip; + rtc_irq_chip = &max77686_rtc_irq_chip; + rtc_regmap = &max77686->rtc_regmap; + cells = max77686_devs; + n_devs = ARRAY_SIZE(max77686_devs); + } else { + config = &max77802_regmap_config; + irq_chip = &max77802_irq_chip; + rtc_irq_chip = &max77802_rtc_irq_chip; + rtc_regmap = &max77686->regmap; + cells = max77802_devs; + n_devs = ARRAY_SIZE(max77802_devs); + } + + max77686->regmap = devm_regmap_init_i2c(i2c, config); + if (IS_ERR(max77686->regmap)) { + ret = PTR_ERR(max77686->regmap); + dev_err(max77686->dev, "Failed to allocate register map: %d\n", + ret); + return ret; + } + + ret = regmap_read(max77686->regmap, MAX77686_REG_DEVICE_ID, &data); + if (ret < 0) { + dev_err(max77686->dev, + "device not found on this channel (this is not an error)\n"); + return -ENODEV; + } + + if (max77686->type == TYPE_MAX77686) { + max77686->rtc = i2c_new_dummy(i2c->adapter, I2C_ADDR_RTC); + if (!max77686->rtc) { + dev_err(max77686->dev, + "Failed to allocate I2C device for RTC\n"); + return -ENODEV; + } + i2c_set_clientdata(max77686->rtc, max77686); + + max77686->rtc_regmap = + devm_regmap_init_i2c(max77686->rtc, + &max77686_rtc_regmap_config); + if (IS_ERR(max77686->rtc_regmap)) { + ret = PTR_ERR(max77686->rtc_regmap); + dev_err(max77686->dev, + "failed to allocate RTC regmap: %d\n", + ret); + goto err_unregister_i2c; + } + } + + ret = regmap_add_irq_chip(max77686->regmap, max77686->irq, + IRQF_TRIGGER_FALLING | IRQF_ONESHOT | + IRQF_SHARED, 0, irq_chip, + &max77686->irq_data); + if (ret) { + dev_err(&i2c->dev, "failed to add PMIC irq chip: %d\n", ret); + goto err_unregister_i2c; + } + + ret = regmap_add_irq_chip(*rtc_regmap, max77686->irq, + IRQF_TRIGGER_FALLING | IRQF_ONESHOT | + IRQF_SHARED, 0, rtc_irq_chip, + &max77686->rtc_irq_data); + if (ret) { + dev_err(&i2c->dev, "failed to add RTC irq chip: %d\n", ret); + goto err_del_irqc; + } + + ret = mfd_add_devices(max77686->dev, -1, cells, n_devs, NULL, 0, NULL); + if (ret < 0) { + dev_err(&i2c->dev, "failed to add MFD devices: %d\n", ret); + goto err_del_rtc_irqc; + } + + return 0; + +err_del_rtc_irqc: + regmap_del_irq_chip(max77686->irq, max77686->rtc_irq_data); +err_del_irqc: + regmap_del_irq_chip(max77686->irq, max77686->irq_data); +err_unregister_i2c: + if (max77686->type == TYPE_MAX77686) + i2c_unregister_device(max77686->rtc); + + return ret; +} + +static int max77686_i2c_remove(struct i2c_client *i2c) +{ + struct max77686_dev *max77686 = i2c_get_clientdata(i2c); + + mfd_remove_devices(max77686->dev); + + regmap_del_irq_chip(max77686->irq, max77686->rtc_irq_data); + regmap_del_irq_chip(max77686->irq, max77686->irq_data); + + if (max77686->type == TYPE_MAX77686) + i2c_unregister_device(max77686->rtc); + + return 0; +} + +static const struct i2c_device_id max77686_i2c_id[] = { + { "max77686", TYPE_MAX77686 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, max77686_i2c_id); + +#ifdef CONFIG_PM_SLEEP +static int max77686_suspend(struct device *dev) +{ + struct i2c_client *i2c = container_of(dev, struct i2c_client, dev); + struct max77686_dev *max77686 = i2c_get_clientdata(i2c); + + if (device_may_wakeup(dev)) + enable_irq_wake(max77686->irq); + + /* + * IRQ must be disabled during suspend because if it happens + * while suspended it will be handled before resuming I2C. + * + * When device is woken up from suspend (e.g. by RTC wake alarm), + * an interrupt occurs before resuming I2C bus controller. + * Interrupt handler tries to read registers but this read + * will fail because I2C is still suspended. + */ + disable_irq(max77686->irq); + + return 0; +} + +static int max77686_resume(struct device *dev) +{ + struct i2c_client *i2c = container_of(dev, struct i2c_client, dev); + struct max77686_dev *max77686 = i2c_get_clientdata(i2c); + + if (device_may_wakeup(dev)) + disable_irq_wake(max77686->irq); + + enable_irq(max77686->irq); + + return 0; +} +#endif /* CONFIG_PM_SLEEP */ + +static SIMPLE_DEV_PM_OPS(max77686_pm, max77686_suspend, max77686_resume); + +static struct i2c_driver max77686_i2c_driver = { + .driver = { + .name = "max77686", + .owner = THIS_MODULE, + .pm = &max77686_pm, + .of_match_table = of_match_ptr(max77686_pmic_dt_match), + }, + .probe = max77686_i2c_probe, + .remove = max77686_i2c_remove, + .id_table = max77686_i2c_id, +}; + +static int __init max77686_i2c_init(void) +{ + return i2c_add_driver(&max77686_i2c_driver); +} +/* init early so consumer devices can complete system boot */ +subsys_initcall(max77686_i2c_init); + +static void __exit max77686_i2c_exit(void) +{ + i2c_del_driver(&max77686_i2c_driver); +} +module_exit(max77686_i2c_exit); + +MODULE_DESCRIPTION("MAXIM 77686/802 multi-function core driver"); +MODULE_AUTHOR("Chiwoong Byun <woong.byun@samsung.com>"); +MODULE_LICENSE("GPL"); |