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|
/*
* linux/drivers/mfd/aat2870-core.c
*
* Copyright (c) 2011, NVIDIA Corporation.
* Author: Jin Park <jinyoungp@nvidia.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.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/debugfs.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
#include <linux/i2c.h>
#include <linux/delay.h>
#include <linux/gpio.h>
#include <linux/mfd/core.h>
#include <linux/mfd/aat2870.h>
#include <linux/regulator/machine.h>
static struct aat2870_register aat2870_regs[AAT2870_REG_NUM] = {
/* readable, writeable, value */
{ 0, 1, 0x00 }, /* 0x00 AAT2870_BL_CH_EN */
{ 0, 1, 0x16 }, /* 0x01 AAT2870_BLM */
{ 0, 1, 0x16 }, /* 0x02 AAT2870_BLS */
{ 0, 1, 0x56 }, /* 0x03 AAT2870_BL1 */
{ 0, 1, 0x56 }, /* 0x04 AAT2870_BL2 */
{ 0, 1, 0x56 }, /* 0x05 AAT2870_BL3 */
{ 0, 1, 0x56 }, /* 0x06 AAT2870_BL4 */
{ 0, 1, 0x56 }, /* 0x07 AAT2870_BL5 */
{ 0, 1, 0x56 }, /* 0x08 AAT2870_BL6 */
{ 0, 1, 0x56 }, /* 0x09 AAT2870_BL7 */
{ 0, 1, 0x56 }, /* 0x0A AAT2870_BL8 */
{ 0, 1, 0x00 }, /* 0x0B AAT2870_FLR */
{ 0, 1, 0x03 }, /* 0x0C AAT2870_FM */
{ 0, 1, 0x03 }, /* 0x0D AAT2870_FS */
{ 0, 1, 0x10 }, /* 0x0E AAT2870_ALS_CFG0 */
{ 0, 1, 0x06 }, /* 0x0F AAT2870_ALS_CFG1 */
{ 0, 1, 0x00 }, /* 0x10 AAT2870_ALS_CFG2 */
{ 1, 0, 0x00 }, /* 0x11 AAT2870_AMB */
{ 0, 1, 0x00 }, /* 0x12 AAT2870_ALS0 */
{ 0, 1, 0x00 }, /* 0x13 AAT2870_ALS1 */
{ 0, 1, 0x00 }, /* 0x14 AAT2870_ALS2 */
{ 0, 1, 0x00 }, /* 0x15 AAT2870_ALS3 */
{ 0, 1, 0x00 }, /* 0x16 AAT2870_ALS4 */
{ 0, 1, 0x00 }, /* 0x17 AAT2870_ALS5 */
{ 0, 1, 0x00 }, /* 0x18 AAT2870_ALS6 */
{ 0, 1, 0x00 }, /* 0x19 AAT2870_ALS7 */
{ 0, 1, 0x00 }, /* 0x1A AAT2870_ALS8 */
{ 0, 1, 0x00 }, /* 0x1B AAT2870_ALS9 */
{ 0, 1, 0x00 }, /* 0x1C AAT2870_ALSA */
{ 0, 1, 0x00 }, /* 0x1D AAT2870_ALSB */
{ 0, 1, 0x00 }, /* 0x1E AAT2870_ALSC */
{ 0, 1, 0x00 }, /* 0x1F AAT2870_ALSD */
{ 0, 1, 0x00 }, /* 0x20 AAT2870_ALSE */
{ 0, 1, 0x00 }, /* 0x21 AAT2870_ALSF */
{ 0, 1, 0x00 }, /* 0x22 AAT2870_SUB_SET */
{ 0, 1, 0x00 }, /* 0x23 AAT2870_SUB_CTRL */
{ 0, 1, 0x00 }, /* 0x24 AAT2870_LDO_AB */
{ 0, 1, 0x00 }, /* 0x25 AAT2870_LDO_CD */
{ 0, 1, 0x00 }, /* 0x26 AAT2870_LDO_EN */
};
static struct mfd_cell aat2870_devs[] = {
{
.name = "aat2870-backlight",
.id = AAT2870_ID_BL,
.pdata_size = sizeof(struct aat2870_bl_platform_data),
},
{
.name = "aat2870-regulator",
.id = AAT2870_ID_LDOA,
.pdata_size = sizeof(struct regulator_init_data),
},
{
.name = "aat2870-regulator",
.id = AAT2870_ID_LDOB,
.pdata_size = sizeof(struct regulator_init_data),
},
{
.name = "aat2870-regulator",
.id = AAT2870_ID_LDOC,
.pdata_size = sizeof(struct regulator_init_data),
},
{
.name = "aat2870-regulator",
.id = AAT2870_ID_LDOD,
.pdata_size = sizeof(struct regulator_init_data),
},
};
static int __aat2870_read(struct aat2870_data *aat2870, u8 addr, u8 *val)
{
int ret;
if (addr >= AAT2870_REG_NUM) {
dev_err(aat2870->dev, "Invalid address, 0x%02x\n", addr);
return -EINVAL;
}
if (!aat2870->reg_cache[addr].readable) {
*val = aat2870->reg_cache[addr].value;
goto out;
}
ret = i2c_master_send(aat2870->client, &addr, 1);
if (ret < 0)
return ret;
if (ret != 1)
return -EIO;
ret = i2c_master_recv(aat2870->client, val, 1);
if (ret < 0)
return ret;
if (ret != 1)
return -EIO;
out:
dev_dbg(aat2870->dev, "read: addr=0x%02x, val=0x%02x\n", addr, *val);
return 0;
}
static int __aat2870_write(struct aat2870_data *aat2870, u8 addr, u8 val)
{
u8 msg[2];
int ret;
if (addr >= AAT2870_REG_NUM) {
dev_err(aat2870->dev, "Invalid address, 0x%02x\n", addr);
return -EINVAL;
}
if (!aat2870->reg_cache[addr].writeable) {
dev_err(aat2870->dev, "Address 0x%02x is not writeable\n",
addr);
return -EINVAL;
}
msg[0] = addr;
msg[1] = val;
ret = i2c_master_send(aat2870->client, msg, 2);
if (ret < 0)
return ret;
if (ret != 2)
return -EIO;
aat2870->reg_cache[addr].value = val;
dev_dbg(aat2870->dev, "write: addr=0x%02x, val=0x%02x\n", addr, val);
return 0;
}
static int aat2870_read(struct aat2870_data *aat2870, u8 addr, u8 *val)
{
int ret;
mutex_lock(&aat2870->io_lock);
ret = __aat2870_read(aat2870, addr, val);
mutex_unlock(&aat2870->io_lock);
return ret;
}
static int aat2870_write(struct aat2870_data *aat2870, u8 addr, u8 val)
{
int ret;
mutex_lock(&aat2870->io_lock);
ret = __aat2870_write(aat2870, addr, val);
mutex_unlock(&aat2870->io_lock);
return ret;
}
static int aat2870_update(struct aat2870_data *aat2870, u8 addr, u8 mask,
u8 val)
{
int change;
u8 old_val, new_val;
int ret;
mutex_lock(&aat2870->io_lock);
ret = __aat2870_read(aat2870, addr, &old_val);
|