all, On Tue, Dec 16, 2014 at 12:24:37PM -0800, Benson Leung wrote: > On Tue, Dec 16, 2014 at 5:56 AM, Jeremiah Mahler <jmmah...@gmail.com> wrote: > > On Mon, Dec 15, 2014 at 02:23:20PM +0800, Dudley Du wrote: > >> Add firmware image update function supported for gen5 trackpad device, > >> it can be used through sysfs update_fw interface. > >> TEST=test on Chromebooks. > >> > >> Signed-off-by: Dudley Du <dudley.duli...@gmail.com> > >> --- > >> drivers/input/mouse/Kconfig | 1 + > >> drivers/input/mouse/cyapa_gen5.c | 292 > >> ++++++++++++++++++++++++++++++++++++++- > >> 2 files changed, 292 insertions(+), 1 deletion(-) > >> > >> diff --git a/drivers/input/mouse/Kconfig b/drivers/input/mouse/Kconfig > >> index d8b46b0..728490e 100644 > >> --- a/drivers/input/mouse/Kconfig > >> +++ b/drivers/input/mouse/Kconfig > >> @@ -206,6 +206,7 @@ config MOUSE_BCM5974 > >> config MOUSE_CYAPA > >> tristate "Cypress APA I2C Trackpad support" > >> depends on I2C > >> + select CRC_ITU_T > >> help > > > > Just found out that if I2C_DESIGNWARE_PCI isn't enabled the touchpad > > won't work. Verify this on your machines. Then perhaps add a depends > > for I2C_DESIGNWARE_PCI instead of I2C since it would include the former. > > This isn't strictly true on all devices, though. This is true on > DESIGNWARE_PCI based devices like the Acer C720 and the HP Chromebook > 14, but on other platforms that use Cypress trackpads, such as ARM > platforms like the Samsung Chromebook Series 3 DESIGNWARE_PCI is not > required, and will just result in a driver that's never used being > built. > > The specific I2C bus that's being used here shouldn't matter here... > that's more of a platform issue. In the case with Chromebooks, it > might make sense to change drivers/platform/chrome/Kconfig so that > CHROMEOS_LAPTOP depends on I2C_DESIGNWARE_PCI, maybe. >
So DESIGNWARE_PCI isn't required for all devices. But if MOUSE_CYAPA is enabled some devices won't work unless I2C_DESIGNWARE_PCI is enabled. I wonder if MOUSE_CYAPA should be broken up in to separate working configurations? MOUSE_CYAPA_GEN5, MOUSE_CYAPA_GEN3, ? > -- > Benson Leung > Software Engineer, Chrome OS > Google Inc. > ble...@google.com -- - Jeremiah Mahler -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
