SDIO power on/off time impacts system suspend/resume time! – SFO17-402

Session ID: SFO17-402
Session Name: SDIO power on/off time impacts system suspend/resume time! – SFO17-402
Speaker: Ulf Hansson

Track: Power Management

★ Session Summary ★
Often an embedded WLAN chip is connected via an SDIO bus. During a system suspend/resume the SDIO card (WLAN chip) gets re-initialized unconditionally, even when it’s not needed.

The re-initialization of an SDIO card often consumes several hundreds of milliseconds, as also shown by real measurements. Unfortunate this time adds up to the total suspend/resume time for the system.

In this session the problem is being described and a solution being explored.
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★ Resources ★
Event Page: http://connect.linaro.org/resource/sfo17/sfo17-402/
Presentation: https://www.slideshare.net/linaroorg/sdio-power-onoff-time-impacts-system-suspendresume-time-sfo17213
Video: https://www.youtube.com/watch?v=ikM0iXDyC8k
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★ Event Details ★
Linaro Connect San Francisco 2017 (SFO17)
25-29 September 2017
Hyatt Regency San Francisco Airport

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Keyword:
‘http://www.linaro.org’
‘http://connect.linaro.org’
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Event Date: 28 Sept 2017

Speakers: Ulf Hansson

Position: Senior Kernel Engineer at Linaro