GTA series power design

Neng-Yu Tu (Tony Tu) tony at openmoko.com
Sun Mar 30 18:37:41 CEST 2008


I think one of the most important thing in mobile device is power 
management design, but up to this point, we still don't have clear 
picture of power management design abstract layer for application and 
lower level hardware.

I saw Intel moblin (http://www.moblin.org/projects/projects_ppm.php) has 
some power management profile as interface for applications. Do we need 
have smiliar design in hardware power bus and software profile parser 
middleware?

Question including:

*What PMU should we use for 6400/6410 (if we use)

*What the bus will be used for devices, we have following device for GTA 
series for sure

**WLAN (SDIO/SPI?)
**Bluetooth (USB/others?)
**Accelerometer (SPI)
**GPS (UART)
**GSM/EDGE (UART)
**Debug (UART/Others?)
**lots LED
**Some mechanical button, some other types
**Wolfson I2S
**PMU I2C

*Any bus design in hardware we could do for better power management design

*Any power management project existing in open source project that could 
suit for device power management?

Tony Tu







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