我需要一些帮助来找出我的rtc-ds1306驱动程序没有绑定到spi2.1设备的原因
我正在开发嵌入式Linux(3.2.0)平台,我想使用spi与RTC DS1306和其他spi设备进行通信。该平台默认使用spi1.0与一个flash进行通信,我可以添加spidev驱动程序并与/dev/spi1.1和/dev/spi2.0进行通信。 rtc-ds1305驱动程序在/ sys / bus / spi / drivers /(rtc-ds1306)下可用,但它不绑定到任何spi(例如:spi2.1)。 Spi1.1和spi2.0自动绑定。我没有在启动时看到任何错误消息...
你能告诉我缺少什么吗?
// --- board-xxxx.c files ----
static const struct flash_platform_data am335x_spi_flash = {
.type = "w25q64",
.name = "spi_flash",
};
/*
* SPI Flash works at 80Mhz however SPI Controller works at 48MHz.
* So setup Max speed to be less than that of Controller speed
*/
static struct spi_board_info am335x_spi0_slave_info[] = {
{
.modalias = "m25p80",
.platform_data = &am335x_spi_flash,
.irq = -1,
.max_speed_hz = 24000000,
.bus_num = 1,
.chip_select = 0,
},
//PH140107 add spidev driver for the spi0_cs1
{
.modalias = "spidev",
.max_speed_hz = 12000000,
.bus_num = 1,
.chip_select = 1,
.mode = SPI_MODE_0,
},
};
//PH140110 add this platform_data
static const struct ds1305_platform_data am335x_spi_rtc = {
.is_ds1306 = true,
.en_1hz = false,
};
/* PH140109
* SPI RTC DS1306 (use RTC-ds1305 driver) and add SPI1_CS0 incase need it for spi1_dsp
* So setup Max speed to be less than that of Controller speed
*/
static struct spi_board_info am335x_spi1_slave_info[] = {
{
.modalias = "rtc-ds1305",
.platform_data = &am335x_spi_rtc,
.max_speed_hz = 1000000,
.bus_num = 2,
.chip_select = 1,
.mode = SPI_CS_HIGH | SPI_CPOL | SPI_CPHA,
},
{
.modalias = "spidev",
.max_speed_hz = 48000000,
.bus_num = 2,
.chip_select = 0,
.mode = SPI_MODE_0,
},
};
编辑:我在/ dev / rtcX中找不到rtc,但在/ sys / bus / spi / devices中我可以看到spi1.0,spi1.1,spi2.0和spi2.1。另外在/ sys / bus / spi / drivers中我可以找到m25p80,rtc-ds1305和spidev。如果我进入/ sys / bus / spi / drivers / spidev我可以看到spi1.1和spi2.0(+ bind,uevent和unbind)但是如果我去/ sys / bus / spi / drivers / rtc-ds1305那里只是绑定,uevent和unbind。
我想我应该看/ dev / rtc0和/ sys / bus / spi / drivers / rtc-ds1305我应该看到spi2.1
答案 0 :(得分:0)
我正在使用开发板,因此ds1306没有填充,因此无法回答rtc-ds1305驱动程序的健全性检查。当连接到真实板时,它出现在/ dev / rtc0。
下问题解决!