Maximising the efficiency of chained regulators

Linux v4.4 will include a cool new feature contributed by Sascha Hauer of Pengutronix which propagates voltages set on a regulator to the regulators that supply it (taking into account the minimum headroom that the child regulator needs). The original reason for implementing it was to allow us to set voltages through simple unregulated power […]

Regulator updates in 3.5

There’s been a bit of an increase in the amount of core work in version 3.5, regmap has enabled a lot of code to be factored out of drivers and into the core so drivers only need to provide data. This makes things a lot simpler to implement and review, it’s hoped that it will […]

regulator updates in 3.4

This has been a fairly quiet release from a regulator point of view, the only real framework features added were devm support and a convenience helper for setting up fixed voltage regulators. Much more coming next time, though! The most noticeable thing in the changelog is that Axel Lin continued his relentless and generally awesome […]

ASoC updates in 3.4

Linux version 3.4 has been released. This was a very active release for ASoC in framework terms, in addition to the usual bug fixes and so on there were a large number of framework enhancements though most are fairly small or are laying the groundwork for more user visible features like dynamic PCM. Support for […]

regulator updates in 3.3

Linux 3.3 was released today. This was the biggest release for the regulator API for quite some time thanks to the contribution of device tree bindings for the API by┬áRajendra Nayak, the first substantial framework update for a long time, but otherwise was fairly quiet: OpenFirmware bindings for the core and for the fixed regulator […]

Setting up regulator consumers with dev_name

The Linux kernel regulator API requires that each system sets up the connections between the various voltage and current regulators in the system and the devices they supply, known as consumers within the regulator API. This is done using the struct device for the consumer device as the key for consumer access. This works well […]