PF0100 PMIC drivers

[sriramchadalava]

Dear community,

  Is anybody aware of existing LINUX I2C based driver/application for the PF0100 Power Management Integrated circuit(datasheet attached) preferably ported to imx6?

Thanks,

Sriram

[AnsonHuang]

Hi, Sriram

     Our linux BSP already have PF0100 driver ready using I2C interface, you can get the BSP release code from freescale web and port it to your platform. See below main files for this drivers, I2C driver, init and regulator driver for pfuse100

     drivers/mfd/pfuze-core.c

     arch/arm/mach-mx6/mx6q_sabresd_pmic_pfuze100.c

     drivers/regulator/pfuze100-regulator.c

[sriramchadalava]

Hi Yongcai,

  Does the Android BSP (application framework, libraries, HAL layer) have anything to access these drivers?

  Or would you know of any example application in the Android BSP which drives I2C to talk to some peripheral?

Thanks,

Sriram

[AnsonHuang]

Hi, Sriram

     As far as I know, Android is not accessing PFuse directly.

     The Pfuze is only accessed by CPUFreq driver, so if there is any CPU freq change, Pfuze will be accessed.

[sriramchadalava]

Hi Yongcai,

  Thanks for the quick reply.

  Can you, your Freescale colleagues or anyone in the community cite examples of similar such Android applications in the BSP directly accessing any other (pref. on I2C bus) Freescale devices?

  Something like:http://processors.wiki.ti.com/index.php/Android_Sensor_PortingGuide

[AnsonHuang]

Hi,

     Sorry that I am not members of Android team. What I know is that we only exposed those interface of accessing PFuze via I2C to sys fs interface. It should be easy to create a HAL to access these sys fs interface, but I don't know how to do that, you may need to ask someone in Android team. I believe that we didn't have the HAL for accessing PFuze so far.

[sriramchadalava]

Hi Yongcai,

   Thanks for the quick response again.

    How can I reach someone in the Freescale Android team? All I'm looking for is some reference or examples for HAL and JNI.

[AlanZhang]

Hi, Sriram,

Yongcai is right that for android, it does only power state change between suspend to resume. Android does not access PMIC directly, what it can see is the /sys/power interface.

Regards,

Alan Zhang