微波EDA网,见证研发工程师的成长!
首页 > 研发问答 > 手机设计讨论 > MTK手机平台交流 > How to setup I2C to high speed on modules

How to setup I2C to high speed on modules

时间:10-02 整理:3721RD 点击:
Dear All:
Thx you to watch this.
I want to setup I2C speed to high speed, but always no work,
I had write a modules, and I have a function like this:
int setup_i2c(void)
{
    int result = 0;
    adapter = i2c_get_adapter(I2C_BUS_NUM);
    if (!adapter) {
        printk(KERN_ERR "i2c_get_adapter() has failed\n");
        return -1;
    }
    i2c_CLIent = i2c_new_device(adapter, &my_dev_info[0]);
    if (!i2c_client) {
        printk(KERN_ERR "i2c_new_device() has failed\n");
        return -1;
    }
    if ((result = i2c_add_driver(&blocks_i2c_driver)) < 0) {
        printk(KERN_ERR "i2c_add_driver() has failed with error '%d'\n", result);
        return result;
    }
    i2c_client->addr |= I2C_DMA_FLAG;
    i2c_client->addr |= I2C_ENEXT_FLAG;
    return result;
}
Right now, my I2C speed about 100K,
I had try add
    i2c_client->addr |= I2C_HS_FLAG;

but still 100K
I had try
    i2c_client->flags |= I2C_HS_FLAG;
and
    i2c_client->ext_flag |= I2C_HS_FLAG;
but still 100k no change anything....
have any one have some experence about this?

路过看看

Copyright © 2017-2020 微波EDA网 版权所有

网站地图

Top