On Monday 23 of February 2009 09:50:52 Oleg Kravchenko wrote: > Hello, everyone. > We are porting the Linux kernel to our PDA, Asus P525/P535. This device > has a pca9535 gpio extender. The keyboard is connected to it. The > extender has only one irq. At the moment, the pca9535 is handled by > pca953x gpio driver. We need to have the access to its registers from > our keyboard driver (so as not to read 13 gpios, but decode the register > containing gpio states). If i try to read each of these 13 gpios after > the interrupt from the extender comes, the kernel crashes. Is there a > solution to read i2c client addresses when there is a client registered > already? > There was some discussion about implementing batch GPIO reads in linux-arm-kernel mailing list, that's probably what you want. > > http://www.kaa.org.ua/asus-p535/hardware.html > -- > 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 -- 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
