On Wed, 19 May 2021, Michael Walle wrote: > Hi, > > Am 2021-05-19 13:53, schrieb Robert Marko: > > On Thu, May 6, 2021 at 6:34 PM Michael Walle <michael@xxxxxxxx> wrote: > > > Am 2021-04-30 14:35, schrieb Robert Marko: > > > > Delta TN48M switches have a Lattice CPLD that serves > > > > multiple purposes including being a GPIO expander. > > > > So lets add the MFD core driver for it. > > > > > > Did you have a look at mfd/simple-mfd-i2c.c? > > > > Yes, that was my first idea but we have a requirement to expose CPLD > > information via debugfs as there are userspace applications using it. > > And simple-mfd-i2c does not allow us to do so. > > Mh, last time Lee wasn't very fond of having a driver that just populates > sub-drivers while doing almost nothing itself. See > https://lore.kernel.org/lkml/20200605065709.GD3714@dell/ Right. I still feel that way. > That being said, I'd also like to expose our CPLD version, but until now > haven't found a good solution. Why though? Does S/W *need* it? -- Lee Jones [李琼斯] Senior Technical Lead - Developer Services Linaro.org │ Open source software for Arm SoCs Follow Linaro: Facebook | Twitter | Blog
