Linux/LM63: about Linux Driver for LM63

user1201164

Part Number: LM63

Tool/software: Linux

HI,

Our customers have LM63 on custom board with i.MX6.
They say they have incorporated the Linux driver in the next web, but they do not display the parts related to FAN.
http://www.ti.com/tool/lm63sw-linux

root@imx6qpdlsolox:~# ls /sys/bus/i2c/drivers/lm63/0-004c/hwmon/hwmon0/
alarms			    pwm1_auto_point4_temp	temp1_input
device			    pwm1_auto_point4_temp_hyst	temp1_max
name			    pwm1_auto_point5_pwm	temp1_max_alarm
of_node			    pwm1_auto_point5_temp	temp2_crit
power			    pwm1_auto_point5_temp_hyst	temp2_crit_alarm
pwm1			    pwm1_auto_point6_pwm	temp2_crit_hyst
pwm1_auto_point1_pwm	    pwm1_auto_point6_temp	temp2_fault
pwm1_auto_point1_temp	    pwm1_auto_point6_temp_hyst	temp2_input
pwm1_auto_point1_temp_hyst  pwm1_auto_point7_pwm	temp2_max
pwm1_auto_point2_pwm	    pwm1_auto_point7_temp	temp2_max_alarm
pwm1_auto_point2_temp	    pwm1_auto_point7_temp_hyst	temp2_min
pwm1_auto_point2_temp_hyst  pwm1_auto_point8_pwm	temp2_min_alarm
pwm1_auto_point3_pwm	    pwm1_auto_point8_temp	temp2_offset
pwm1_auto_point3_temp	    pwm1_auto_point8_temp_hyst	uevent
pwm1_auto_point3_temp_hyst  pwm1_enable			update_interval
pwm1_auto_point4_pwm	    subsystem

What kind of points should be checked so that parts related to FAN can be used?
This is the case when the DTS file is as follows.

lm63: lm63@4c {
    compatible = "national,lm63";
    reg = <0x4c>;
};

Best Regards,

Kouji Nishigata

over 7 years ago

0 Kelvin Le THS over 7 years ago

TI__Expert 7645 points

Kouji,

I'll need to examine to source code and get back to you.

-Kelvin

0 user1201164 over 7 years ago in reply to Kelvin Le THS

Expert 1770 points

HI,

Thank you for your response

The situation confirmation has come from the customer.
Please tell me if you have any idea or what to check.

Best Regards,
Kouji Nishigata

0 Megan Anderson over 7 years ago in reply to user1201164

TI__Prodigy 240 points

Hi Kouji,

Can you further clarify the problem for me?

From the code snippet I do not see anything related to FAN. You can go to www.ti.com/.../lm63sw-linux and check the "1.drivers/hwmon/lm63.c" source file. I would start by looking at "fan1_input" and "fan1_min".

-Megan Anderson

0 user1201164 over 7 years ago in reply to Megan Anderson

Expert 1770 points

Hi,

Thank you for checking out

I confirmed with the customer.
They said that they wanted to know the commands and settings for knowing FAN information from the lm63 driver.
Setting by their knowledge, however it is said that it became a state like the first question.

Best Regards,
Kouji Nishigata

0 Megan Anderson over 7 years ago in reply to user1201164

TI__Prodigy 240 points

Hi,

Can you let me know what type of information you want from the FAN? Are you trying to measure the FAN speed, RPM?

Best,
Megan

0 user1201164 over 6 years ago in reply to Megan Anderson

Expert 1770 points

HI,

Thank you for responding.
It seems that customers were able to solve themselves.

They found that FAN is displayed when ALERT / Tach Select (bit 2) of the Configuration Register is set. It seems that how to set this bit was the last problem.
They did not incorporate the LM 63 driver in u-boot, but by setting this, it means that the previous bit is set and FAN is displayed on Linux command line as well .

Best Regards,
Kouji Nishigata

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Linux/LM63: about Linux Driver for LM63