![Afzal Mohammed](/assets/img/avatar_default.png)
TPS65910 can be used without interrupts. Hence let probe succeed in case interrupt can't be configured and let Kernel only to complain about it Signed-off-by: Afzal Mohammed <afzal@ti.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
232 lines
5 KiB
C
232 lines
5 KiB
C
/*
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* tps65910.c -- TI TPS6591x
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*
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* Copyright 2010 Texas Instruments Inc.
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*
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* Author: Graeme Gregory <gg@slimlogic.co.uk>
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* Author: Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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*/
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/i2c.h>
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#include <linux/gpio.h>
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#include <linux/mfd/core.h>
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#include <linux/mfd/tps65910.h>
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static struct mfd_cell tps65910s[] = {
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{
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.name = "tps65910-pmic",
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},
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{
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.name = "tps65910-rtc",
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},
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{
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.name = "tps65910-power",
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},
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};
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static int tps65910_i2c_read(struct tps65910 *tps65910, u8 reg,
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int bytes, void *dest)
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{
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struct i2c_client *i2c = tps65910->i2c_client;
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struct i2c_msg xfer[2];
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int ret;
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/* Write register */
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xfer[0].addr = i2c->addr;
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xfer[0].flags = 0;
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xfer[0].len = 1;
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xfer[0].buf = ®
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/* Read data */
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xfer[1].addr = i2c->addr;
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xfer[1].flags = I2C_M_RD;
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xfer[1].len = bytes;
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xfer[1].buf = dest;
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ret = i2c_transfer(i2c->adapter, xfer, 2);
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if (ret == 2)
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ret = 0;
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else if (ret >= 0)
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ret = -EIO;
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return ret;
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}
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static int tps65910_i2c_write(struct tps65910 *tps65910, u8 reg,
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int bytes, void *src)
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{
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struct i2c_client *i2c = tps65910->i2c_client;
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/* we add 1 byte for device register */
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u8 msg[TPS65910_MAX_REGISTER + 1];
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int ret;
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if (bytes > TPS65910_MAX_REGISTER)
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return -EINVAL;
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msg[0] = reg;
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memcpy(&msg[1], src, bytes);
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ret = i2c_master_send(i2c, msg, bytes + 1);
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if (ret < 0)
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return ret;
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if (ret != bytes + 1)
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return -EIO;
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return 0;
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}
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int tps65910_set_bits(struct tps65910 *tps65910, u8 reg, u8 mask)
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{
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u8 data;
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int err;
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mutex_lock(&tps65910->io_mutex);
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err = tps65910_i2c_read(tps65910, reg, 1, &data);
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if (err) {
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dev_err(tps65910->dev, "read from reg %x failed\n", reg);
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goto out;
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}
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data |= mask;
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err = tps65910_i2c_write(tps65910, reg, 1, &data);
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if (err)
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dev_err(tps65910->dev, "write to reg %x failed\n", reg);
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out:
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mutex_unlock(&tps65910->io_mutex);
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return err;
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}
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EXPORT_SYMBOL_GPL(tps65910_set_bits);
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int tps65910_clear_bits(struct tps65910 *tps65910, u8 reg, u8 mask)
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{
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u8 data;
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int err;
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mutex_lock(&tps65910->io_mutex);
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err = tps65910_i2c_read(tps65910, reg, 1, &data);
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if (err) {
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dev_err(tps65910->dev, "read from reg %x failed\n", reg);
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goto out;
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}
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data &= ~mask;
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err = tps65910_i2c_write(tps65910, reg, 1, &data);
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if (err)
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dev_err(tps65910->dev, "write to reg %x failed\n", reg);
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out:
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mutex_unlock(&tps65910->io_mutex);
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return err;
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}
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EXPORT_SYMBOL_GPL(tps65910_clear_bits);
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static int tps65910_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 tps65910 *tps65910;
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struct tps65910_board *pmic_plat_data;
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struct tps65910_platform_data *init_data;
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int ret = 0;
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pmic_plat_data = dev_get_platdata(&i2c->dev);
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if (!pmic_plat_data)
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return -EINVAL;
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init_data = kzalloc(sizeof(struct tps65910_platform_data), GFP_KERNEL);
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if (init_data == NULL)
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return -ENOMEM;
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tps65910 = kzalloc(sizeof(struct tps65910), GFP_KERNEL);
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if (tps65910 == NULL) {
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kfree(init_data);
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return -ENOMEM;
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}
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i2c_set_clientdata(i2c, tps65910);
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tps65910->dev = &i2c->dev;
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tps65910->i2c_client = i2c;
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tps65910->id = id->driver_data;
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tps65910->read = tps65910_i2c_read;
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tps65910->write = tps65910_i2c_write;
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mutex_init(&tps65910->io_mutex);
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ret = mfd_add_devices(tps65910->dev, -1,
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tps65910s, ARRAY_SIZE(tps65910s),
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NULL, 0);
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if (ret < 0)
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goto err;
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init_data->irq = pmic_plat_data->irq;
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init_data->irq_base = pmic_plat_data->irq;
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tps65910_gpio_init(tps65910, pmic_plat_data->gpio_base);
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tps65910_irq_init(tps65910, init_data->irq, init_data);
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kfree(init_data);
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return ret;
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err:
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kfree(tps65910);
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kfree(init_data);
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return ret;
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}
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static int tps65910_i2c_remove(struct i2c_client *i2c)
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{
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struct tps65910 *tps65910 = i2c_get_clientdata(i2c);
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tps65910_irq_exit(tps65910);
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mfd_remove_devices(tps65910->dev);
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kfree(tps65910);
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return 0;
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}
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static const struct i2c_device_id tps65910_i2c_id[] = {
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{ "tps65910", TPS65910 },
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{ "tps65911", TPS65911 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, tps65910_i2c_id);
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static struct i2c_driver tps65910_i2c_driver = {
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.driver = {
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.name = "tps65910",
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.owner = THIS_MODULE,
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},
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.probe = tps65910_i2c_probe,
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.remove = tps65910_i2c_remove,
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.id_table = tps65910_i2c_id,
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};
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static int __init tps65910_i2c_init(void)
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{
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return i2c_add_driver(&tps65910_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(tps65910_i2c_init);
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static void __exit tps65910_i2c_exit(void)
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{
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i2c_del_driver(&tps65910_i2c_driver);
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}
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module_exit(tps65910_i2c_exit);
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MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>");
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MODULE_AUTHOR("Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>");
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MODULE_DESCRIPTION("TPS6591x chip family multi-function driver");
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MODULE_LICENSE("GPL");
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