topic Re: start kernel information in i.MX Processors

start kernel information

caohaifeng — Thu, 23 May 2013 03:00:20 GMT

Hello,I port the linux kernel to my custom board,the attachment is start kernel information.

I am newbie,how to understand this piece of information?

Regards,

Haifeng

Original Attachment has been moved to: 启动信息.zip

Re: start kernel information

weidong_sun — Thu, 23 May 2013 06:50:12 GMT

Hello,Cao,

你的板子启动算是正常的，输入root ，就可以登录。你现在使用的是Mini Profile文件系统，不带GUI图形界面，因此，显示器或者显示屏，不会有显示。

似乎USB有些不太对，你需要检查CPU端USB供电，2.5V和3.3V是否正常。你把USB_OTG和USB HOST的2.5及3.3V，都检查一下。

Regards,

Weidong

Re: start kernel information

caohaifeng — Thu, 23 May 2013 10:25:32 GMT

伟东你好。

我看imx53START-R板启动信息中，有pmic各电压的设置信息，我这个似乎cpu和pmic中间的i2c通信没有成功。另外，出现freescale login:输入root没反应。是否和我mx53_xx.c改动的较为粗糙有关（只是配置了用到的管脚，没有写一些初始化程序）？

Regards,

海峰

Re: start kernel information

weidong_sun — Thu, 23 May 2013 15:27:21 GMT

海峰，

应该是linux/drivers/mxc/pmic/core/pmic_core_i2c.c中，你稍作一下修改，看你遇到的问题，可能是I2C总线上，没有找到MC34708。这样改一下：

static int __devinit pmic_probe(struct i2c_client client,
const struct i2c_device_id id)
{
int ret = 0;
int pmic_irq;
struct pmic_platform_data *plat_data = client->dev.platform_data;
**const char *name="mc34708";**
int pmic_index;

/* ret = is_chip_onboard(client);
if (ret == -1)
return -ENODEV;

name = get_chipname(client);*/

if (!name)

return PMIC_ERROR;

....

Weidong

Re: start kernel information

weidong_sun — Mon, 27 May 2013 05:47:32 GMT

Hello,Haifeng,

If above reply is OK, please help to press correct answer button.

Thanks,

Weidong

Re: start kernel information

caohaifeng — Tue, 28 May 2013 02:17:38 GMT

Hello,weidong,

You are right,the Supply USB_H1_VDDA33 and USB_H1_VDDA25 are not right. I am checking the board.

Regards,

Haifeng

topic Re: start kernel information in i.MX Processors

start kernel information

Re: start kernel information

Re: start kernel information

Re: start kernel information

static int __devinit pmic_probe(struct i2c_client *client, const struct i2c_device_id *id){int ret = 0;int pmic_irq;struct pmic_platform_data *plat_data = client->dev.platform_data;const char *name="mc34708";int pmic_index;

Re: start kernel information

Re: start kernel information

static int __devinit pmic_probe(struct i2c_client client,
const struct i2c_device_id id)
{
int ret = 0;
int pmic_irq;
struct pmic_platform_data *plat_data = client->dev.platform_data;
**const char *name="mc34708";**
int pmic_index;