179 lines
4.0 KiB
C
179 lines
4.0 KiB
C
/*
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* tps65912-core.c -- TI TPS65912x
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*
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* Copyright 2011 Texas Instruments Inc.
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*
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* Author: Margarita Olaya Cabrera <magi@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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* This driver is based on wm8350 implementation.
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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/gpio.h>
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#include <linux/mfd/core.h>
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#include <linux/mfd/tps65912.h>
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static struct mfd_cell tps65912s[] = {
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{
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.name = "tps65912-pmic",
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},
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};
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int tps65912_set_bits(struct tps65912 *tps65912, 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(&tps65912->io_mutex);
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err = tps65912->read(tps65912, reg, 1, &data);
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if (err) {
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dev_err(tps65912->dev, "Read from reg 0x%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 = tps65912->write(tps65912, reg, 1, &data);
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if (err)
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dev_err(tps65912->dev, "Write to reg 0x%x failed\n", reg);
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out:
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mutex_unlock(&tps65912->io_mutex);
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return err;
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}
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EXPORT_SYMBOL_GPL(tps65912_set_bits);
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int tps65912_clear_bits(struct tps65912 *tps65912, 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(&tps65912->io_mutex);
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err = tps65912->read(tps65912, reg, 1, &data);
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if (err) {
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dev_err(tps65912->dev, "Read from reg 0x%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 = tps65912->write(tps65912, reg, 1, &data);
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if (err)
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dev_err(tps65912->dev, "Write to reg 0x%x failed\n", reg);
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out:
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mutex_unlock(&tps65912->io_mutex);
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return err;
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}
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EXPORT_SYMBOL_GPL(tps65912_clear_bits);
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static inline int tps65912_read(struct tps65912 *tps65912, u8 reg)
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{
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u8 val;
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int err;
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err = tps65912->read(tps65912, reg, 1, &val);
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if (err < 0)
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return err;
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return val;
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}
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static inline int tps65912_write(struct tps65912 *tps65912, u8 reg, u8 val)
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{
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return tps65912->write(tps65912, reg, 1, &val);
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}
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int tps65912_reg_read(struct tps65912 *tps65912, u8 reg)
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{
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int data;
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mutex_lock(&tps65912->io_mutex);
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data = tps65912_read(tps65912, reg);
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if (data < 0)
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dev_err(tps65912->dev, "Read from reg 0x%x failed\n", reg);
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mutex_unlock(&tps65912->io_mutex);
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return data;
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}
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EXPORT_SYMBOL_GPL(tps65912_reg_read);
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int tps65912_reg_write(struct tps65912 *tps65912, u8 reg, u8 val)
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{
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int err;
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mutex_lock(&tps65912->io_mutex);
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err = tps65912_write(tps65912, reg, val);
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if (err < 0)
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dev_err(tps65912->dev, "Write for reg 0x%x failed\n", reg);
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mutex_unlock(&tps65912->io_mutex);
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return err;
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}
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EXPORT_SYMBOL_GPL(tps65912_reg_write);
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int tps65912_device_init(struct tps65912 *tps65912)
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{
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struct tps65912_board *pmic_plat_data = tps65912->dev->platform_data;
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struct tps65912_platform_data *init_data;
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int ret, dcdc_avs, value;
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init_data = kzalloc(sizeof(struct tps65912_platform_data), GFP_KERNEL);
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if (init_data == NULL)
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return -ENOMEM;
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mutex_init(&tps65912->io_mutex);
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dev_set_drvdata(tps65912->dev, tps65912);
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dcdc_avs = (pmic_plat_data->is_dcdc1_avs << 0 |
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pmic_plat_data->is_dcdc2_avs << 1 |
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pmic_plat_data->is_dcdc3_avs << 2 |
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pmic_plat_data->is_dcdc4_avs << 3);
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if (dcdc_avs) {
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tps65912->read(tps65912, TPS65912_I2C_SPI_CFG, 1, &value);
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dcdc_avs |= value;
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tps65912->write(tps65912, TPS65912_I2C_SPI_CFG, 1, &dcdc_avs);
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}
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ret = mfd_add_devices(tps65912->dev, -1,
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tps65912s, ARRAY_SIZE(tps65912s),
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NULL, 0, NULL);
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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_base;
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ret = tps65912_irq_init(tps65912, init_data->irq, init_data);
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if (ret < 0)
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goto err;
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kfree(init_data);
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return ret;
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err:
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kfree(init_data);
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mfd_remove_devices(tps65912->dev);
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kfree(tps65912);
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return ret;
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}
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void tps65912_device_exit(struct tps65912 *tps65912)
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{
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mfd_remove_devices(tps65912->dev);
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tps65912_irq_exit(tps65912);
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kfree(tps65912);
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}
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MODULE_AUTHOR("Margarita Olaya <magi@slimlogic.co.uk>");
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MODULE_DESCRIPTION("TPS65912x chip family multi-function driver");
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MODULE_LICENSE("GPL");
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