246 lines
5.3 KiB
C
Executable File
246 lines
5.3 KiB
C
Executable File
/*
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* TI LP8788 MFD - core interface
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*
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* Copyright 2012 Texas Instruments
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*
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* Author: Milo(Woogyom) Kim <milo.kim@ti.com>
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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 version 2 as
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* published by the Free Software Foundation.
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*
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*/
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#include <linux/err.h>
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#include <linux/i2c.h>
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#include <linux/mfd/core.h>
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#include <linux/mfd/lp8788.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#define MAX_LP8788_REGISTERS 0xA2
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#define MFD_DEV_SIMPLE(_name) \
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{ \
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.name = LP8788_DEV_##_name, \
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}
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#define MFD_DEV_WITH_ID(_name, _id) \
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{ \
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.name = LP8788_DEV_##_name, \
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.id = _id, \
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}
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#define MFD_DEV_WITH_RESOURCE(_name, _resource, num_resource) \
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{ \
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.name = LP8788_DEV_##_name, \
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.resources = _resource, \
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.num_resources = num_resource, \
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}
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static struct resource chg_irqs[] = {
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/* Charger Interrupts */
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{
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.start = LP8788_INT_CHG_INPUT_STATE,
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.end = LP8788_INT_PRECHG_TIMEOUT,
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.name = LP8788_CHG_IRQ,
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.flags = IORESOURCE_IRQ,
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},
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/* Power Routing Switch Interrupts */
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{
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.start = LP8788_INT_ENTER_SYS_SUPPORT,
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.end = LP8788_INT_EXIT_SYS_SUPPORT,
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.name = LP8788_PRSW_IRQ,
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.flags = IORESOURCE_IRQ,
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},
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/* Battery Interrupts */
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{
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.start = LP8788_INT_BATT_LOW,
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.end = LP8788_INT_NO_BATT,
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.name = LP8788_BATT_IRQ,
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.flags = IORESOURCE_IRQ,
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},
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};
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static struct resource rtc_irqs[] = {
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{
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.start = LP8788_INT_RTC_ALARM1,
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.end = LP8788_INT_RTC_ALARM2,
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.name = LP8788_ALM_IRQ,
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.flags = IORESOURCE_IRQ,
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},
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};
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static const struct mfd_cell lp8788_devs[] = {
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/* 4 bucks */
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MFD_DEV_WITH_ID(BUCK, 1),
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MFD_DEV_WITH_ID(BUCK, 2),
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MFD_DEV_WITH_ID(BUCK, 3),
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MFD_DEV_WITH_ID(BUCK, 4),
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/* 12 digital ldos */
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MFD_DEV_WITH_ID(DLDO, 1),
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MFD_DEV_WITH_ID(DLDO, 2),
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MFD_DEV_WITH_ID(DLDO, 3),
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MFD_DEV_WITH_ID(DLDO, 4),
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MFD_DEV_WITH_ID(DLDO, 5),
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MFD_DEV_WITH_ID(DLDO, 6),
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MFD_DEV_WITH_ID(DLDO, 7),
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MFD_DEV_WITH_ID(DLDO, 8),
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MFD_DEV_WITH_ID(DLDO, 9),
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MFD_DEV_WITH_ID(DLDO, 10),
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MFD_DEV_WITH_ID(DLDO, 11),
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MFD_DEV_WITH_ID(DLDO, 12),
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/* 10 analog ldos */
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MFD_DEV_WITH_ID(ALDO, 1),
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MFD_DEV_WITH_ID(ALDO, 2),
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MFD_DEV_WITH_ID(ALDO, 3),
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MFD_DEV_WITH_ID(ALDO, 4),
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MFD_DEV_WITH_ID(ALDO, 5),
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MFD_DEV_WITH_ID(ALDO, 6),
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MFD_DEV_WITH_ID(ALDO, 7),
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MFD_DEV_WITH_ID(ALDO, 8),
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MFD_DEV_WITH_ID(ALDO, 9),
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MFD_DEV_WITH_ID(ALDO, 10),
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/* ADC */
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MFD_DEV_SIMPLE(ADC),
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/* battery charger */
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MFD_DEV_WITH_RESOURCE(CHARGER, chg_irqs, ARRAY_SIZE(chg_irqs)),
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/* rtc */
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MFD_DEV_WITH_RESOURCE(RTC, rtc_irqs, ARRAY_SIZE(rtc_irqs)),
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/* backlight */
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MFD_DEV_SIMPLE(BACKLIGHT),
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/* current sink for vibrator */
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MFD_DEV_SIMPLE(VIBRATOR),
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/* current sink for keypad LED */
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MFD_DEV_SIMPLE(KEYLED),
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};
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int lp8788_read_byte(struct lp8788 *lp, u8 reg, u8 *data)
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{
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int ret;
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unsigned int val;
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ret = regmap_read(lp->regmap, reg, &val);
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if (ret < 0) {
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dev_err(lp->dev, "failed to read 0x%.2x\n", reg);
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return ret;
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}
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*data = (u8)val;
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return 0;
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}
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EXPORT_SYMBOL_GPL(lp8788_read_byte);
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int lp8788_read_multi_bytes(struct lp8788 *lp, u8 reg, u8 *data, size_t count)
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{
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return regmap_bulk_read(lp->regmap, reg, data, count);
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}
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EXPORT_SYMBOL_GPL(lp8788_read_multi_bytes);
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int lp8788_write_byte(struct lp8788 *lp, u8 reg, u8 data)
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{
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return regmap_write(lp->regmap, reg, data);
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}
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EXPORT_SYMBOL_GPL(lp8788_write_byte);
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int lp8788_update_bits(struct lp8788 *lp, u8 reg, u8 mask, u8 data)
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{
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return regmap_update_bits(lp->regmap, reg, mask, data);
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}
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EXPORT_SYMBOL_GPL(lp8788_update_bits);
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static int lp8788_platform_init(struct lp8788 *lp)
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{
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struct lp8788_platform_data *pdata = lp->pdata;
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return (pdata && pdata->init_func) ? pdata->init_func(lp) : 0;
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}
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static const struct regmap_config lp8788_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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.max_register = MAX_LP8788_REGISTERS,
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};
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static int lp8788_probe(struct i2c_client *cl, const struct i2c_device_id *id)
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{
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struct lp8788 *lp;
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struct lp8788_platform_data *pdata = dev_get_platdata(&cl->dev);
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int ret;
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lp = devm_kzalloc(&cl->dev, sizeof(struct lp8788), GFP_KERNEL);
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if (!lp)
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return -ENOMEM;
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lp->regmap = devm_regmap_init_i2c(cl, &lp8788_regmap_config);
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if (IS_ERR(lp->regmap)) {
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ret = PTR_ERR(lp->regmap);
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dev_err(&cl->dev, "regmap init i2c err: %d\n", ret);
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return ret;
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}
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lp->pdata = pdata;
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lp->dev = &cl->dev;
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i2c_set_clientdata(cl, lp);
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ret = lp8788_platform_init(lp);
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if (ret)
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return ret;
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ret = lp8788_irq_init(lp, cl->irq);
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if (ret)
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return ret;
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return mfd_add_devices(lp->dev, -1, lp8788_devs,
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ARRAY_SIZE(lp8788_devs), NULL, 0, NULL);
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}
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static int lp8788_remove(struct i2c_client *cl)
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{
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struct lp8788 *lp = i2c_get_clientdata(cl);
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mfd_remove_devices(lp->dev);
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lp8788_irq_exit(lp);
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return 0;
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}
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static const struct i2c_device_id lp8788_ids[] = {
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{"lp8788", 0},
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, lp8788_ids);
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static struct i2c_driver lp8788_driver = {
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.driver = {
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.name = "lp8788",
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.owner = THIS_MODULE,
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},
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.probe = lp8788_probe,
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.remove = lp8788_remove,
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.id_table = lp8788_ids,
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};
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static int __init lp8788_init(void)
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{
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return i2c_add_driver(&lp8788_driver);
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}
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subsys_initcall(lp8788_init);
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static void __exit lp8788_exit(void)
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{
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i2c_del_driver(&lp8788_driver);
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}
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module_exit(lp8788_exit);
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MODULE_DESCRIPTION("TI LP8788 MFD Driver");
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MODULE_AUTHOR("Milo Kim");
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MODULE_LICENSE("GPL");
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