[PATCH] mmc: sdio add regulator vsdio
zhangfei.gao at gmail.com
Fri Jul 22 03:25:08 EDT 2011
On Fri, Jul 22, 2011 at 2:50 PM, Daniel Drake <dsd at laptop.org> wrote:
> On 21 July 2011 03:34, Zhangfei Gao <zhangfei.gao at marvell.com> wrote:
>> sdio client may be required power on/off dynamically.
>> With regulator vsdio, sdio client power on/off could be executed by mmc_power_up/down
> I think you can/should do this with vmmc. When the device gets powered
> down (e.g. in runtime suspend), the voltage should be cut, so it
> should be possible to use the existing regulator.
Have considered re-use vmmc before,
Consider dynamically power control only required for sdio, so use
vsdio to exclude potential issue to sd/mmc.
Anyway, will try re-use vmmc.
> I also looked at doing this before, when it looked like we would have
> to manipulate a GPIO reset line for SD8686. I decided that the current
> vmmc implementation in sdhci wasn't quite complete enough, but it
> wouldn't be much effort to correct this.
> linux-arm-kernel mailing list
> linux-arm-kernel at lists.infradead.org
More information about the linux-arm-kernel