Lines Matching refs:keypad
56 static void __activate_col(struct matrix_keypad *keypad, int col, bool on) in __activate_col() argument
59 gpiod_direction_output(keypad->col_gpios[col], 1); in __activate_col()
61 gpiod_set_value_cansleep(keypad->col_gpios[col], 0); in __activate_col()
62 if (!keypad->drive_inactive_cols) in __activate_col()
63 gpiod_direction_input(keypad->col_gpios[col]); in __activate_col()
67 static void activate_col(struct matrix_keypad *keypad, int col, bool on) in activate_col() argument
69 __activate_col(keypad, col, on); in activate_col()
71 if (on && keypad->col_scan_delay_us) in activate_col()
72 fsleep(keypad->col_scan_delay_us); in activate_col()
75 static void activate_all_cols(struct matrix_keypad *keypad, bool on) in activate_all_cols() argument
79 for (col = 0; col < keypad->num_col_gpios; col++) in activate_all_cols()
80 __activate_col(keypad, col, on); in activate_all_cols()
82 if (on && keypad->all_cols_on_delay_us) in activate_all_cols()
83 fsleep(keypad->all_cols_on_delay_us); in activate_all_cols()
86 static bool row_asserted(struct matrix_keypad *keypad, int row) in row_asserted() argument
88 return gpiod_get_value_cansleep(keypad->row_gpios[row]); in row_asserted()
91 static void enable_row_irqs(struct matrix_keypad *keypad) in enable_row_irqs() argument
95 for (i = 0; i < keypad->num_row_gpios; i++) in enable_row_irqs()
96 enable_irq(keypad->row_irqs[i]); in enable_row_irqs()
99 static void disable_row_irqs(struct matrix_keypad *keypad) in disable_row_irqs() argument
103 for (i = 0; i < keypad->num_row_gpios; i++) in disable_row_irqs()
104 disable_irq_nosync(keypad->row_irqs[i]); in disable_row_irqs()
107 static uint32_t read_row_state(struct matrix_keypad *keypad) in read_row_state() argument
112 for (row = 0; row < keypad->num_row_gpios; row++) in read_row_state()
113 row_state |= row_asserted(keypad, row) ? BIT(row) : 0; in read_row_state()
122 struct matrix_keypad *keypad = in matrix_keypad_scan() local
124 struct input_dev *input_dev = keypad->input_dev; in matrix_keypad_scan()
131 init_row_state = read_row_state(keypad); in matrix_keypad_scan()
134 activate_all_cols(keypad, false); in matrix_keypad_scan()
138 for (row = 0; row < keypad->num_row_gpios; row++) in matrix_keypad_scan()
139 gpiod_direction_input(keypad->row_gpios[row]); in matrix_keypad_scan()
142 for (col = 0; col < keypad->num_col_gpios; col++) { in matrix_keypad_scan()
144 activate_col(keypad, col, true); in matrix_keypad_scan()
146 new_state[col] = read_row_state(keypad); in matrix_keypad_scan()
148 activate_col(keypad, col, false); in matrix_keypad_scan()
151 for (col = 0; col < keypad->num_col_gpios; col++) { in matrix_keypad_scan()
154 bits_changed = keypad->last_key_state[col] ^ new_state[col]; in matrix_keypad_scan()
158 for (row = 0; row < keypad->num_row_gpios; row++) { in matrix_keypad_scan()
162 code = MATRIX_SCAN_CODE(row, col, keypad->row_shift); in matrix_keypad_scan()
171 memcpy(keypad->last_key_state, new_state, sizeof(new_state)); in matrix_keypad_scan()
173 activate_all_cols(keypad, true); in matrix_keypad_scan()
176 scoped_guard(spinlock_irq, &keypad->lock) { in matrix_keypad_scan()
177 keypad->scan_pending = false; in matrix_keypad_scan()
178 enable_row_irqs(keypad); in matrix_keypad_scan()
182 new_row_state = read_row_state(keypad); in matrix_keypad_scan()
184 guard(spinlock_irq)(&keypad->lock); in matrix_keypad_scan()
185 if (unlikely(keypad->scan_pending || keypad->stopped)) in matrix_keypad_scan()
187 disable_row_irqs(keypad); in matrix_keypad_scan()
188 keypad->scan_pending = true; in matrix_keypad_scan()
189 schedule_delayed_work(&keypad->work, in matrix_keypad_scan()
190 msecs_to_jiffies(keypad->debounce_ms)); in matrix_keypad_scan()
196 struct matrix_keypad *keypad = id; in matrix_keypad_interrupt() local
198 guard(spinlock_irqsave)(&keypad->lock); in matrix_keypad_interrupt()
205 if (unlikely(keypad->scan_pending || keypad->stopped)) in matrix_keypad_interrupt()
208 disable_row_irqs(keypad); in matrix_keypad_interrupt()
209 keypad->scan_pending = true; in matrix_keypad_interrupt()
210 schedule_delayed_work(&keypad->work, in matrix_keypad_interrupt()
211 msecs_to_jiffies(keypad->debounce_ms)); in matrix_keypad_interrupt()
219 struct matrix_keypad *keypad = input_get_drvdata(dev); in matrix_keypad_start() local
221 keypad->stopped = false; in matrix_keypad_start()
228 schedule_delayed_work(&keypad->work, 0); in matrix_keypad_start()
235 struct matrix_keypad *keypad = input_get_drvdata(dev); in matrix_keypad_stop() local
237 scoped_guard(spinlock_irq, &keypad->lock) { in matrix_keypad_stop()
238 keypad->stopped = true; in matrix_keypad_stop()
241 flush_delayed_work(&keypad->work); in matrix_keypad_stop()
246 disable_row_irqs(keypad); in matrix_keypad_stop()
249 static void matrix_keypad_enable_wakeup(struct matrix_keypad *keypad) in matrix_keypad_enable_wakeup() argument
253 for_each_clear_bit(i, keypad->wakeup_enabled_irqs, in matrix_keypad_enable_wakeup()
254 keypad->num_row_gpios) in matrix_keypad_enable_wakeup()
255 if (enable_irq_wake(keypad->row_irqs[i]) == 0) in matrix_keypad_enable_wakeup()
256 __set_bit(i, keypad->wakeup_enabled_irqs); in matrix_keypad_enable_wakeup()
259 static void matrix_keypad_disable_wakeup(struct matrix_keypad *keypad) in matrix_keypad_disable_wakeup() argument
263 for_each_set_bit(i, keypad->wakeup_enabled_irqs, in matrix_keypad_disable_wakeup()
264 keypad->num_row_gpios) { in matrix_keypad_disable_wakeup()
265 disable_irq_wake(keypad->row_irqs[i]); in matrix_keypad_disable_wakeup()
266 __clear_bit(i, keypad->wakeup_enabled_irqs); in matrix_keypad_disable_wakeup()
273 struct matrix_keypad *keypad = platform_get_drvdata(pdev); in matrix_keypad_suspend() local
275 matrix_keypad_stop(keypad->input_dev); in matrix_keypad_suspend()
278 matrix_keypad_enable_wakeup(keypad); in matrix_keypad_suspend()
286 struct matrix_keypad *keypad = platform_get_drvdata(pdev); in matrix_keypad_resume() local
289 matrix_keypad_disable_wakeup(keypad); in matrix_keypad_resume()
291 matrix_keypad_start(keypad->input_dev); in matrix_keypad_resume()
300 struct matrix_keypad *keypad) in matrix_keypad_init_gpio() argument
314 keypad->num_row_gpios = nrow; in matrix_keypad_init_gpio()
315 keypad->num_col_gpios = ncol; in matrix_keypad_init_gpio()
320 for (i = 0; i < keypad->num_col_gpios; i++) { in matrix_keypad_init_gpio()
321 keypad->col_gpios[i] = devm_gpiod_get_index(&pdev->dev, "col", in matrix_keypad_init_gpio()
323 err = PTR_ERR_OR_ZERO(keypad->col_gpios[i]); in matrix_keypad_init_gpio()
331 gpiod_set_consumer_name(keypad->col_gpios[i], "matrix_kbd_col"); in matrix_keypad_init_gpio()
333 if (active_low ^ gpiod_is_active_low(keypad->col_gpios[i])) in matrix_keypad_init_gpio()
334 gpiod_toggle_active_low(keypad->col_gpios[i]); in matrix_keypad_init_gpio()
336 gpiod_direction_output(keypad->col_gpios[i], 1); in matrix_keypad_init_gpio()
339 for (i = 0; i < keypad->num_row_gpios; i++) { in matrix_keypad_init_gpio()
340 keypad->row_gpios[i] = devm_gpiod_get_index(&pdev->dev, "row", in matrix_keypad_init_gpio()
342 err = PTR_ERR_OR_ZERO(keypad->row_gpios[i]); in matrix_keypad_init_gpio()
350 gpiod_set_consumer_name(keypad->row_gpios[i], "matrix_kbd_row"); in matrix_keypad_init_gpio()
352 if (active_low ^ gpiod_is_active_low(keypad->row_gpios[i])) in matrix_keypad_init_gpio()
353 gpiod_toggle_active_low(keypad->row_gpios[i]); in matrix_keypad_init_gpio()
360 struct matrix_keypad *keypad) in matrix_keypad_setup_interrupts() argument
366 for (i = 0; i < keypad->num_row_gpios; i++) { in matrix_keypad_setup_interrupts()
367 irq = gpiod_to_irq(keypad->row_gpios[i]); in matrix_keypad_setup_interrupts()
380 "matrix-keypad", keypad); in matrix_keypad_setup_interrupts()
388 keypad->row_irqs[i] = irq; in matrix_keypad_setup_interrupts()
392 disable_row_irqs(keypad); in matrix_keypad_setup_interrupts()
399 struct matrix_keypad *keypad; in matrix_keypad_probe() local
404 keypad = devm_kzalloc(&pdev->dev, sizeof(*keypad), GFP_KERNEL); in matrix_keypad_probe()
405 if (!keypad) in matrix_keypad_probe()
412 keypad->input_dev = input_dev; in matrix_keypad_probe()
413 keypad->stopped = true; in matrix_keypad_probe()
414 INIT_DELAYED_WORK(&keypad->work, matrix_keypad_scan); in matrix_keypad_probe()
415 spin_lock_init(&keypad->lock); in matrix_keypad_probe()
417 keypad->drive_inactive_cols = in matrix_keypad_probe()
420 &keypad->debounce_ms); in matrix_keypad_probe()
422 &keypad->col_scan_delay_us); in matrix_keypad_probe()
424 &keypad->all_cols_on_delay_us); in matrix_keypad_probe()
426 err = matrix_keypad_init_gpio(pdev, keypad); in matrix_keypad_probe()
430 keypad->row_shift = get_count_order(keypad->num_col_gpios); in matrix_keypad_probe()
432 err = matrix_keypad_setup_interrupts(pdev, keypad); in matrix_keypad_probe()
442 keypad->num_row_gpios, in matrix_keypad_probe()
443 keypad->num_col_gpios, in matrix_keypad_probe()
454 input_set_drvdata(input_dev, keypad); in matrix_keypad_probe()
456 err = input_register_device(keypad->input_dev); in matrix_keypad_probe()
465 platform_set_drvdata(pdev, keypad); in matrix_keypad_probe()