On 10/14/2017 02:19 AM, jeffy wrote:
it looks like the suspend sequence depends on the dt node sequence, and we are putting display-subsystem dt node above spi dt node, so it would be earlier in the device list, then got suspended later than spi device. the pwm backlight and cros_ec_spi pwm are very interesting, not only about suspend dependency... if we unbind cros_ec_spi pwm, the pwm backlight would still hold a reference to it, and crash the kernel later.
or maybe we should move device_pm_add() from device_add() to driver_bound()? -- To unsubscribe from this list: send the line "unsubscribe linux-spi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
