Hi Andi, On Tue, 25 Apr 2017 20:00:56 +0900, Andi Shyti wrote: > > > On Mon, Apr 24, 2017 at 09:42:31AM +0200, Jean Delvare wrote: > > So it really boils down to this question: is that chip a generic part > > from Cypress, and if so, what is the real part number? Or was is > > designed privately by Cypress specifically for Samsung for this one > > board (and possibly others to come)? > > I knew that the naming was bringing confusion and we had a > previous discussion about it with Chanwoo [1]. > > This is indeed a generic device from Cypress. The driver has been > ported from Android's Kernel [2]; it says that the device > part is cy8cmbr3xxx, but the datasheet [3] doesn't have any > connection with what the TM2 board has (i.e. the registers don't > match). That's why we suspected that (as you said) this might be > a touch key sensor specifically designed for the TM2 board. Thanks for the pointers, it helps. > Cypress was not that helpful. I've been there before with other manufacturers. Chipsets designed specifically for one hardware vendor are the hardest to support for this reason. > The alternative was to not provide support, but it didn't look > right. I agree, you did the right thing by getting the driver upstream. But it doesn't mean this driver must be enabled in all distribution kernels. -- Jean Delvare SUSE L3 Support -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
