Unresponsive keys of HHKB JP Bluetooth controller

[tmk]

With Bluetooth controller for HHKB JP some keys are unresponsive during power saving of Bluetooth mode. This problem will occur also with USB mode when USB suspend state.

The unresponsive keys are on the first row of matrix; ESC TAB LFn LShift LCtrl

KEY_POWER_OFF() of hhkb_avr.h is the cause; lines making PC6 and PC7 input with pull-up, to be precise. Not sure why those lines cuase this problem exactly.

tmk_keyboard/keyboard/hhkb/hhkb_avr.h

Lines 58 to 61 in 35203ca

	#ifdef HHKB_JP
	DDRC &= ~(1<<6|1<<7);
	PORTC |= (1<<6|1<<7);
	#endif

static inline void KEY_POWER_OFF(void) {
    /* input with pull-up consumes less than without it when pin is open. */
    DDRB = 0x00; PORTB = 0xFF;          // change pins input with pull-up
#ifdef HHKB_JP
    DDRC  &= ~(1<<6|1<<7);
    PORTC |=  (1<<6|1<<7);
#endif
    DDRD |= (1<<4); PORTD &= ~(1<<4);   // MOS FET switch off
}