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October 23-26, 2017 - Prague, Czech Republic
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Monday, October 23 • 09:50 - 10:30
SD/eMMC: New Speed Modes and Their Support in Linux - Gregory Clement, Free Electrons

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Since the introduction of the original "default"(DS) and "high speed"(HS) modes, the SD card standard has evolved by introducing new speed modes, such as SDR12, SDR25, SDR50, SDR104, etc. The same happened to the eMMC standard, with the introduction of new high speed modes named DDR52, HS200, HS400, etc. The Linux kernel has obviously evolved to support these new speed modes, both in the MMC core and through the addition of new drivers.

This talk will start by introducing the SD and eMMC standards and how they work at the hardware level, with a specific focus on the new speed modes. With this hardware background in place, we will then detail how these standards are supported by Linux, see what is still missing, and what we can expect to see in the future.

Speakers
avatar for Gregory Clement

Gregory Clement

Embedded Linux Software Engineer, Free Electrons
Gregory Clement is an embedded Linux engineer and trainer at Free Electrons since 2010. He has 17 years of on the field experience in porting and operating embedded Linux on many hardware architectures. He is currently involved in the integration of Marvell Armada SoCs (both ARM... Read More →


Monday October 23, 2017 09:50 - 10:30
Karlin II

Attendees (212)