Hi Dmitry On 2019/08/17 2:24, Dmitry Torokhov wrote:
On Fri, Aug 16, 2019 at 05:34:58PM +0900, Jiada Wang wrote:From: Kautuk Consul <kautuk_consul@xxxxxxxxxx> The upstream Atmel mXT driver implementation seems to handle the T19 GPIO/PWM object as a key pad. Keys can be defined in the device tree ("linux,gpio-keymap") and will be transported as key events to the Linux input device if GPIO state changes. With our hardware, the GPIO pins of the touch controller are connected to a PWM/backlight controller and used as supervision inputs. We like to read the status of the pins by a script or an application in the sysfs. Adding newer sysfs entries which shall be placed in the input class directory eg: /sys/class/input/input<n>/backlight_error1No, if you want to export GPIO lines for external use create a gpiochip instance and register it with GPIO subsystem. No ad-hoc sysfs please.
Agree, I will drop this patch in v2 patch-set Thanks, Jiada
Thanks.
