On Tue, Jul 08, 2014 at 10:00:23PM +0200, Stephen Boyd wrote: > > I added Tegra folks because I see that on Tegra this hardware is exposed > via an SoC specific API, tegra_fuse_readl(), and an associated driver in > drivers/misc/fuse/tegra/. Unfortunately I don't see any users of the API > outside of the speedo code in the same directory and the sysfs bin > attribute that may or may not be in use by some userspace code. > The SATA driver by Mikko Perttunen uses it. The driver hasn't been merged though. There's some more upcoming work which makes use of it. I don't think we can standardize much of an API for this. The data is SoC specific, so the user will always need to have some SoC specific knowledge on how to use it. In some cases we need it very early (eg. to determine the correct Tegra20 revision). On Tegra20 we can't use the CPU to read the fuses due to a hw bug, we have to use DMA, which means the transaction becomes blocking and could fail due to lack of resources. Cheers, Peter. -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
