cregit-Linux how code gets into the kernel

Release 4.14 drivers/mfd/88pm860x-i2c.c

Directory: drivers/mfd
/*
 * I2C driver for Marvell 88PM860x
 *
 * Copyright (C) 2009 Marvell International Ltd.
 *
 * Author: Haojian Zhuang <haojian.zhuang@marvell.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/kernel.h>
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/regmap.h>
#include <linux/mfd/88pm860x.h>


int pm860x_reg_read(struct i2c_client *i2c, int reg) { struct pm860x_chip *chip = i2c_get_clientdata(i2c); struct regmap *map = (i2c == chip->client) ? chip->regmap : chip->regmap_companion; unsigned int data; int ret; ret = regmap_read(map, reg, &data); if (ret < 0) return ret; else return (int)data; }

Contributors

PersonTokensPropCommitsCommitProp
Haojian Zhuang5569.62%266.67%
Jett.Zhou2430.38%133.33%
Total79100.00%3100.00%

EXPORT_SYMBOL(pm860x_reg_read);
int pm860x_reg_write(struct i2c_client *i2c, int reg, unsigned char data) { struct pm860x_chip *chip = i2c_get_clientdata(i2c); struct regmap *map = (i2c == chip->client) ? chip->regmap : chip->regmap_companion; int ret; ret = regmap_write(map, reg, data); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Haojian Zhuang4264.62%266.67%
Jett.Zhou2335.38%133.33%
Total65100.00%3100.00%

EXPORT_SYMBOL(pm860x_reg_write);
int pm860x_bulk_read(struct i2c_client *i2c, int reg, int count, unsigned char *buf) { struct pm860x_chip *chip = i2c_get_clientdata(i2c); struct regmap *map = (i2c == chip->client) ? chip->regmap : chip->regmap_companion; int ret; ret = regmap_raw_read(map, reg, buf, count); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Haojian Zhuang4664.79%266.67%
Jett.Zhou2535.21%133.33%
Total71100.00%3100.00%

EXPORT_SYMBOL(pm860x_bulk_read);
int pm860x_bulk_write(struct i2c_client *i2c, int reg, int count, unsigned char *buf) { struct pm860x_chip *chip = i2c_get_clientdata(i2c); struct regmap *map = (i2c == chip->client) ? chip->regmap : chip->regmap_companion; int ret; ret = regmap_raw_write(map, reg, buf, count); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Haojian Zhuang4664.79%266.67%
Jett.Zhou2535.21%133.33%
Total71100.00%3100.00%

EXPORT_SYMBOL(pm860x_bulk_write);
int pm860x_set_bits(struct i2c_client *i2c, int reg, unsigned char mask, unsigned char data) { struct pm860x_chip *chip = i2c_get_clientdata(i2c); struct regmap *map = (i2c == chip->client) ? chip->regmap : chip->regmap_companion; int ret; ret = regmap_update_bits(map, reg, mask, data); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Haojian Zhuang4867.61%266.67%
Jett.Zhou2332.39%133.33%
Total71100.00%3100.00%

EXPORT_SYMBOL(pm860x_set_bits);
static int read_device(struct i2c_client *i2c, int reg, int bytes, void *dest) { unsigned char msgbuf0[I2C_SMBUS_BLOCK_MAX + 3]; unsigned char msgbuf1[I2C_SMBUS_BLOCK_MAX + 2]; struct i2c_adapter *adap = i2c->adapter; struct i2c_msg msg[2] = { { .addr = i2c->addr, .flags = 0, .len = 1, .buf = msgbuf0 }, { .addr = i2c->addr, .flags = I2C_M_RD, .len = 0, .buf = msgbuf1 }, }; int num = 1, ret = 0; if (dest == NULL) return -EINVAL; msgbuf0[0] = (unsigned char)reg; /* command */ msg[1].len = bytes; /* if data needs to read back, num should be 2 */ if (bytes > 0) num = 2; ret = adap->algo->master_xfer(adap, msg, num); memcpy(dest, msgbuf1, bytes); if (ret < 0) return ret; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Jett.Zhou15279.17%133.33%
Shubhrajyoti Datta2412.50%133.33%
Haojian Zhuang168.33%133.33%
Total192100.00%3100.00%


static int write_device(struct i2c_client *i2c, int reg, int bytes, void *src) { unsigned char buf[2]; struct i2c_adapter *adap = i2c->adapter; struct i2c_msg msg; int ret; buf[0] = (unsigned char)reg; memcpy(&buf[1], src, bytes); msg.addr = i2c->addr; msg.flags = 0; msg.len = bytes + 1; msg.buf = buf; ret = adap->algo->master_xfer(adap, &msg, 1); if (ret < 0) return ret; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Jett.Zhou12298.39%133.33%
Lee Jones10.81%133.33%
Haojian Zhuang10.81%133.33%
Total124100.00%3100.00%


int pm860x_page_reg_write(struct i2c_client *i2c, int reg, unsigned char data) { unsigned char zero; int ret; i2c_lock_adapter(i2c->adapter); read_device(i2c, 0xFA, 0, &zero); read_device(i2c, 0xFB, 0, &zero); read_device(i2c, 0xFF, 0, &zero); ret = write_device(i2c, reg, 1, &data); read_device(i2c, 0xFE, 0, &zero); read_device(i2c, 0xFC, 0, &zero); i2c_unlock_adapter(i2c->adapter); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Haojian Zhuang10389.57%150.00%
Jett.Zhou1210.43%150.00%
Total115100.00%2100.00%

EXPORT_SYMBOL(pm860x_page_reg_write);
int pm860x_page_bulk_read(struct i2c_client *i2c, int reg, int count, unsigned char *buf) { unsigned char zero = 0; int ret; i2c_lock_adapter(i2c->adapter); read_device(i2c, 0xfa, 0, &zero); read_device(i2c, 0xfb, 0, &zero); read_device(i2c, 0xff, 0, &zero); ret = read_device(i2c, reg, count, buf); read_device(i2c, 0xFE, 0, &zero); read_device(i2c, 0xFC, 0, &zero); i2c_unlock_adapter(i2c->adapter); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Haojian Zhuang10587.50%150.00%
Jett.Zhou1512.50%150.00%
Total120100.00%2100.00%

EXPORT_SYMBOL(pm860x_page_bulk_read);

Overall Contributors

PersonTokensPropCommitsCommitProp
Haojian Zhuang50852.97%337.50%
Jett.Zhou42544.32%225.00%
Shubhrajyoti Datta242.50%112.50%
Lee Jones20.21%225.00%
Total959100.00%8100.00%
Directory: drivers/mfd
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