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