diff options
Diffstat (limited to 'drivers/mfd/pf1550.c')
| -rw-r--r-- | drivers/mfd/pf1550.c | 311 |
1 files changed, 311 insertions, 0 deletions
diff --git a/drivers/mfd/pf1550.c b/drivers/mfd/pf1550.c new file mode 100644 index 000000000000..44c92f466a99 --- /dev/null +++ b/drivers/mfd/pf1550.c @@ -0,0 +1,311 @@ +/* + * pf1550.c - mfd core driver for the PF1550 + * + * Copyright (C) 2016 Freescale Semiconductor, Inc. + * Robin Gong <yibin.gong@freescale.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. + * + * This driver is based on max77693.c + */ + +#include <linux/err.h> +#include <linux/i2c.h> +#include <linux/interrupt.h> +#include <linux/module.h> +#include <linux/mfd/core.h> +#include <linux/mfd/pf1550.h> +#include <linux/of.h> +#include <linux/regmap.h> + +static const struct mfd_cell pf1550_devs[] = { + { + .name = "pf1550-regulator", + .of_compatible = "fsl,pf1550-regulator", + }, + { + .name = "pf1550-onkey", + .of_compatible = "fsl,pf1550-onkey", + }, + { + .name = "pf1550-charger", + .of_compatible = "fsl,pf1550-charger", + }, +}; + +static const struct regmap_config pf1550_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .max_register = PF1550_PMIC_REG_END, +}; + +static const struct regmap_irq pf1550_regulator_irqs[] = { + { .reg_offset = 0, .mask = PMIC_IRQ_SW1_LS, }, + { .reg_offset = 0, .mask = PMIC_IRQ_SW2_LS, }, + { .reg_offset = 0, .mask = PMIC_IRQ_SW3_LS, }, + + { .reg_offset = 3, .mask = PMIC_IRQ_SW1_HS, }, + { .reg_offset = 3, .mask = PMIC_IRQ_SW2_HS, }, + { .reg_offset = 3, .mask = PMIC_IRQ_SW3_HS, }, + + { .reg_offset = 16, .mask = PMIC_IRQ_LDO1_FAULT, }, + { .reg_offset = 16, .mask = PMIC_IRQ_LDO2_FAULT, }, + { .reg_offset = 16, .mask = PMIC_IRQ_LDO3_FAULT, }, + + { .reg_offset = 22, .mask = PMIC_IRQ_TEMP_110, }, + { .reg_offset = 22, .mask = PMIC_IRQ_TEMP_125, }, +}; + +static const struct regmap_irq_chip pf1550_regulator_irq_chip = { + .name = "pf1550-regulator", + .status_base = PF1550_PMIC_REG_SW_INT_STAT0, + .mask_base = PF1550_PMIC_REG_SW_INT_MASK0, + .mask_invert = false, + .num_regs = 23, + .irqs = pf1550_regulator_irqs, + .num_irqs = ARRAY_SIZE(pf1550_regulator_irqs), +}; + +static const struct regmap_irq pf1550_onkey_irqs[] = { + { .reg_offset = 0, .mask = ONKEY_IRQ_PUSHI, }, + { .reg_offset = 0, .mask = ONKEY_IRQ_1SI, }, + { .reg_offset = 0, .mask = ONKEY_IRQ_2SI, }, + { .reg_offset = 0, .mask = ONKEY_IRQ_3SI, }, + { .reg_offset = 0, .mask = ONKEY_IRQ_4SI, }, + { .reg_offset = 0, .mask = ONKEY_IRQ_8SI, }, +}; + +static const struct regmap_irq_chip pf1550_onkey_irq_chip = { + .name = "pf1550-onkey", + .status_base = PF1550_PMIC_REG_ONKEY_INT_STAT0, + .ack_base = PF1550_PMIC_REG_ONKEY_INT_STAT0, + .mask_base = PF1550_PMIC_REG_ONKEY_INT_MASK0, + .mask_invert = false, + .use_ack = 1, + .init_ack_masked = 1, + .num_regs = 1, + .irqs = pf1550_onkey_irqs, + .num_irqs = ARRAY_SIZE(pf1550_onkey_irqs), +}; + +static const struct regmap_irq pf1550_charger_irqs[] = { + { .reg_offset = 0, .mask = CHARG_IRQ_BAT2SOCI, }, + { .reg_offset = 0, .mask = CHARG_IRQ_BATI, }, + { .reg_offset = 0, .mask = CHARG_IRQ_CHGI, }, + { .reg_offset = 0, .mask = CHARG_IRQ_VBUSI, }, + { .reg_offset = 0, .mask = CHARG_IRQ_THMI, }, +}; + +static const struct regmap_irq_chip pf1550_charger_irq_chip = { + .name = "pf1550-charger", + .status_base = PF1550_CHARG_REG_CHG_INT, + .mask_base = PF1550_CHARG_REG_CHG_INT_MASK, + .mask_invert = false, + .num_regs = 1, + .irqs = pf1550_charger_irqs, + .num_irqs = ARRAY_SIZE(pf1550_charger_irqs), +}; + +int pf1550_read_otp(struct pf1550_dev *pf1550, unsigned int index, + unsigned int *val) +{ + int ret = 0; + + ret = regmap_write(pf1550->regmap, PF1550_PMIC_REG_KEY, 0x15); + if (ret) + goto read_err; + ret = regmap_write(pf1550->regmap, PF1550_CHARG_REG_CHGR_KEY2, 0x50); + if (ret) + goto read_err; + ret = regmap_write(pf1550->regmap, PF1550_TEST_REG_KEY3, 0xAB); + if (ret) + goto read_err; + ret = regmap_write(pf1550->regmap, PF1550_TEST_REG_FMRADDR, index); + if (ret) + goto read_err; + ret = regmap_read(pf1550->regmap, PF1550_TEST_REG_FMRDATA, val); + if (ret) + goto read_err; + + return 0; + +read_err: + dev_err(pf1550->dev, "read otp reg %x found!\n", index); + return ret; +} + +static int pf1550_i2c_probe(struct i2c_client *i2c, + const struct i2c_device_id *id) +{ + struct pf1550_dev *pf1550; + unsigned int reg_data = 0; + int ret = 0; + + pf1550 = devm_kzalloc(&i2c->dev, + sizeof(struct pf1550_dev), GFP_KERNEL); + if (!pf1550) + return -ENOMEM; + + i2c_set_clientdata(i2c, pf1550); + pf1550->dev = &i2c->dev; + pf1550->i2c = i2c; + pf1550->irq = i2c->irq; + + pf1550->regmap = devm_regmap_init_i2c(i2c, &pf1550_regmap_config); + if (IS_ERR(pf1550->regmap)) { + ret = PTR_ERR(pf1550->regmap); + dev_err(pf1550->dev, "failed to allocate register map: %d\n", + ret); + return ret; + } + + ret = regmap_read(pf1550->regmap, PF1550_PMIC_REG_DEVICE_ID, ®_data); + if (ret < 0 || reg_data != 0x7c) { + dev_err(pf1550->dev, "device not found!\n"); + return ret; + } + + pf1550->type = PF1550; + dev_info(pf1550->dev, "pf1550 found.\n"); + + ret = regmap_add_irq_chip(pf1550->regmap, pf1550->irq, + IRQF_ONESHOT | IRQF_SHARED | + IRQF_TRIGGER_FALLING, 0, + &pf1550_regulator_irq_chip, + &pf1550->irq_data_regulator); + if (ret) { + dev_err(pf1550->dev, "failed to add irq1 chip: %d\n", ret); + goto err_regulator_irq; + } + + ret = regmap_add_irq_chip(pf1550->regmap, pf1550->irq, + IRQF_ONESHOT | IRQF_SHARED | + IRQF_TRIGGER_FALLING, 0, + &pf1550_onkey_irq_chip, + &pf1550->irq_data_onkey); + if (ret) { + dev_err(pf1550->dev, "failed to add irq3 chip: %d\n", ret); + goto err_onkey_irq; + } + + ret = regmap_add_irq_chip(pf1550->regmap, pf1550->irq, + IRQF_ONESHOT | IRQF_SHARED | + IRQF_TRIGGER_FALLING, 0, + &pf1550_charger_irq_chip, + &pf1550->irq_data_charger); + if (ret) { + dev_err(pf1550->dev, "failed to add irq4 chip: %d\n", ret); + goto err_charger_irq; + } + + ret = mfd_add_devices(pf1550->dev, -1, pf1550_devs, + ARRAY_SIZE(pf1550_devs), NULL, 0, NULL); + if (ret < 0) + goto err_mfd; + + return ret; + +err_mfd: + mfd_remove_devices(pf1550->dev); +err_charger_irq: + regmap_del_irq_chip(pf1550->irq, pf1550->irq_data_charger); +err_onkey_irq: + regmap_del_irq_chip(pf1550->irq, pf1550->irq_data_regulator); +err_regulator_irq: + return ret; +} + +static int pf1550_i2c_remove(struct i2c_client *i2c) +{ + struct pf1550_dev *pf1550 = i2c_get_clientdata(i2c); + + mfd_remove_devices(pf1550->dev); + + regmap_del_irq_chip(pf1550->irq, pf1550->irq_data_regulator); + regmap_del_irq_chip(pf1550->irq, pf1550->irq_data_onkey); + regmap_del_irq_chip(pf1550->irq, pf1550->irq_data_charger); + + return 0; +} + +static const struct i2c_device_id pf1550_i2c_id[] = { + { "pf1550", PF1550 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, pf1550_i2c_id); + +static int pf1550_suspend(struct device *dev) +{ + struct i2c_client *i2c = container_of(dev, struct i2c_client, dev); + struct pf1550_dev *pf1550 = i2c_get_clientdata(i2c); + + if (device_may_wakeup(dev)) { + enable_irq_wake(pf1550->irq); + disable_irq(pf1550->irq); + } + + return 0; +} + +static int pf1550_resume(struct device *dev) +{ + struct i2c_client *i2c = container_of(dev, struct i2c_client, dev); + struct pf1550_dev *pf1550 = i2c_get_clientdata(i2c); + + if (device_may_wakeup(dev)) { + disable_irq_wake(pf1550->irq); + enable_irq(pf1550->irq); + } + + return 0; +} + +static const struct dev_pm_ops pf1550_pm = { + .suspend = pf1550_suspend, + .resume = pf1550_resume, +}; + +#ifdef CONFIG_OF +static const struct of_device_id pf1550_dt_match[] = { + { .compatible = "fsl,pf1550" }, + {}, +}; +#endif + +static struct i2c_driver pf1550_i2c_driver = { + .driver = { + .name = "pf1550", + .owner = THIS_MODULE, + .pm = &pf1550_pm, + .of_match_table = of_match_ptr(pf1550_dt_match), + }, + .probe = pf1550_i2c_probe, + .remove = pf1550_i2c_remove, + .id_table = pf1550_i2c_id, +}; + +static int __init pf1550_i2c_init(void) +{ + return i2c_add_driver(&pf1550_i2c_driver); +} +/* init early so consumer devices can complete system boot */ +subsys_initcall(pf1550_i2c_init); + +static void __exit pf1550_i2c_exit(void) +{ + i2c_del_driver(&pf1550_i2c_driver); +} +module_exit(pf1550_i2c_exit); + +MODULE_DESCRIPTION("Freescale PF1550 multi-function core driver"); +MODULE_AUTHOR("Robin Gong <yibin.gong@freescale.com>"); +MODULE_LICENSE("GPL"); + |