I2C chip Drivers

最新推荐文章于 2024-04-23 22:29:40 发布

原创最新推荐文章于 2024-04-23 22:29:40 发布 · 1k 阅读

2 ·

CC 4.0 BY-SA版权

文章标签：

#c #struct #数据结构 #up

Kernel Device Driver 专栏收录该内容

31 篇文章

订阅专栏

本文介绍了stargate2平台上的I2C设备配置详情，包括使用特定的数据结构定义多个I2C设备及其地址、中断等参数，并展示了如何通过i2c_register_board_info函数将这些设备注册到I2C总线上。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

1 i2c_board_info数据结构的定义

static struct i2c_board_info __initdata stargate2_i2c_board_info[] = { /* Techically this a pca9500 - but it's compatible with the 8574 * for gpio expansion and the 24c02 for eeprom access. */ { .type = "pcf8574", .addr = 0x27, .platform_data = &platform_data_pcf857x, }, { .type = "24c02", .addr = 0x57, .platform_data = &pca9500_eeprom_pdata, }, { .type = "max1238", .addr = 0x35, }, { /* ITS400 Sensor board only */ .type = "max1363", .addr = 0x34, /* Through a nand gate - Also beware, on V2 sensor board the * pull up resistors are missing. */ .irq = IRQ_GPIO(99), }, { /* ITS400 Sensor board only */ .type = "tsl2561", .addr = 0x49, /* Through a nand gate - Also beware, on V2 sensor board the * pull up resistors are missing. */ .irq = IRQ_GPIO(99), }, { /* ITS400 Sensor board only */ .type = "tmp175", .addr = 0x4A, .irq = IRQ_GPIO(96), }, }; static struct i2c_board_info __initdata stargate2_pwr_i2c_board_info[] = { { .type = "da9030", .addr = 0x49, .platform_data = &stargate2_da9030_pdata, .irq = gpio_to_irq(1), }, };

Note:Pay attetion on the value of the addr member.(addr=chip_address>>1)