mfd: add act8846 driver
Signed-off-by: Beniamino Galvani <b.galvani@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
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@ -1,5 +1,9 @@
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menu MFD
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menu MFD
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config MFD_ACT8846
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depends on I2C
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bool "ACT8846 driver"
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config MFD_LP3972
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config MFD_LP3972
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depends on I2C
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depends on I2C
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bool "LP3972 driver"
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bool "LP3972 driver"
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@ -1,3 +1,4 @@
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obj-$(CONFIG_MFD_ACT8846) += act8846.o
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obj-$(CONFIG_MFD_LP3972) += lp3972.o
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obj-$(CONFIG_MFD_LP3972) += lp3972.o
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obj-$(CONFIG_MFD_MC13XXX) += mc13xxx.o
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obj-$(CONFIG_MFD_MC13XXX) += mc13xxx.o
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obj-$(CONFIG_MFD_MC34704) += mc34704.o
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obj-$(CONFIG_MFD_MC34704) += mc34704.o
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@ -0,0 +1,154 @@
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/*
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* Copyright (C) 2007 Sascha Hauer, Pengutronix
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* 2009 Marc Kleine-Budde <mkl@pengutronix.de>
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*
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* Copied from drivers/mfd/mc9sdz60.c
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*
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*/
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#include <common.h>
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#include <init.h>
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#include <driver.h>
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#include <xfuncs.h>
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#include <errno.h>
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#include <i2c/i2c.h>
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#include <mfd/act8846.h>
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#define DRIVERNAME "act8846"
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#define to_act8846(a) container_of(a, struct act8846, cdev)
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static struct act8846 *act8846_dev;
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struct act8846 *act8846_get(void)
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{
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if (!act8846_dev)
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return NULL;
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return act8846_dev;
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}
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EXPORT_SYMBOL(act8846_get);
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int act8846_reg_read(struct act8846 *act8846, enum act8846_reg reg, u8 *val)
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{
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int ret;
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ret = i2c_read_reg(act8846->client, reg, val, 1);
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return ret == 1 ? 0 : ret;
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}
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EXPORT_SYMBOL(act8846_reg_read);
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int act8846_reg_write(struct act8846 *act8846, enum act8846_reg reg, u8 val)
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{
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int ret;
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ret = i2c_write_reg(act8846->client, reg, &val, 1);
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return ret == 1 ? 0 : ret;
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}
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EXPORT_SYMBOL(act8846_reg_write);
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int act8846_set_bits(struct act8846 *act8846, enum act8846_reg reg,
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u8 mask, u8 val)
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{
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u8 tmp;
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int err;
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err = act8846_reg_read(act8846, reg, &tmp);
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tmp = (tmp & ~mask) | val;
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if (!err)
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err = act8846_reg_write(act8846, reg, tmp);
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return err;
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}
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EXPORT_SYMBOL(act8846_set_bits);
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static ssize_t act8846_read(struct cdev *cdev, void *_buf, size_t count,
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loff_t offset, ulong flags)
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{
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struct act8846 *act8846 = to_act8846(cdev);
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u8 *buf = _buf;
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size_t i = count;
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int err;
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while (i) {
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err = act8846_reg_read(act8846, offset, buf);
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if (err)
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return (ssize_t)err;
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buf++;
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i--;
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offset++;
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}
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return count;
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}
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static ssize_t act8846_write(struct cdev *cdev, const void *_buf, size_t count,
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loff_t offset, ulong flags)
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{
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struct act8846 *act8846 = to_act8846(cdev);
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const u8 *buf = _buf;
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size_t i = count;
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int err;
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while (i) {
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err = act8846_reg_write(act8846, offset, *buf);
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if (err)
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return (ssize_t)err;
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buf++;
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i--;
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offset++;
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}
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return count;
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}
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static struct file_operations act8846_fops = {
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.lseek = dev_lseek_default,
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.read = act8846_read,
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.write = act8846_write,
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};
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static int act8846_probe(struct device_d *dev)
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{
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if (act8846_dev)
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return -EBUSY;
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act8846_dev = xzalloc(sizeof(struct act8846));
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act8846_dev->cdev.name = DRIVERNAME;
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act8846_dev->client = to_i2c_client(dev);
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act8846_dev->cdev.size = 64;
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act8846_dev->cdev.dev = dev;
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act8846_dev->cdev.ops = &act8846_fops;
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devfs_create(&act8846_dev->cdev);
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return 0;
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}
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static struct driver_d act8846_driver = {
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.name = DRIVERNAME,
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.probe = act8846_probe,
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};
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static int act8846_init(void)
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{
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i2c_driver_register(&act8846_driver);
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return 0;
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}
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device_initcall(act8846_init);
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@ -0,0 +1,56 @@
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/*
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* Copyright (C) 2009 Marc Kleine-Budde <mkl@pengutronix.de>
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*
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* This file is released under the GPLv2
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*
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* Derived from mc9sdz60.h
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*/
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#ifndef _ACT8846_H
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#define _ACT8846_H
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enum act8846_reg {
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ACT8846_SYS_MODE = 0x00,
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ACT8846_SYS_CTRL = 0x01,
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ACT8846_DCDC1_VSET1 = 0x10,
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ACT8846_DCDC1_CTRL = 0x12,
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ACT8846_DCDC2_VSET1 = 0x20,
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ACT8846_DCDC2_VSET2 = 0x21,
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ACT8846_DCDC2_CTRL = 0x22,
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ACT8846_DCDC3_VSET1 = 0x30,
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ACT8846_DCDC3_VSET2 = 0x31,
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ACT8846_DCDC3_CTRL = 0x32,
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ACT8846_DCDC4_VSET1 = 0x40,
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ACT8846_DCDC4_VSET2 = 0x41,
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ACT8846_DCDC4_CTRL = 0x42,
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ACT8846_LDO5_VSET = 0x50,
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ACT8846_LDO5_CTRL = 0x51,
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ACT8846_LDO6_VSET = 0x58,
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ACT8846_LDO6_CTRL = 0x59,
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ACT8846_LDO7_VSET = 0x60,
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ACT8846_LDO7_CTRL = 0x61,
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ACT8846_LDO8_VSET = 0x68,
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ACT8846_LDO8_CTRL = 0x69,
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ACT8846_LDO9_VSET = 0x70,
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ACT8846_LDO9_CTRL = 0x71,
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ACT8846_LDO10_VSET = 0x80,
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ACT8846_LDO10_CTRL = 0x81,
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ACT8846_LDO11_VSET = 0x90,
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ACT8846_LDO11_CTRL = 0x91,
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ACT8846_LDO12_VSET = 0xA0,
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ACT8846_LDO12_CTRL = 0xA1,
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};
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struct act8846 {
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struct cdev cdev;
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struct i2c_client *client;
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};
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struct act8846 *act8846_get(void);
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int act8846_reg_read(struct act8846 *priv, enum act8846_reg reg, u8 *val);
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int act8846_reg_write(struct act8846 *priv, enum act8846_reg reg, u8 val);
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int act8846_set_bits(struct act8846 *priv, enum act8846_reg reg,
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u8 mask, u8 val);
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#endif /* _ACT8846_H */
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