Lines Matching +full:inactive +full:- +full:delay
1 // SPDX-License-Identifier: GPL-2.0-only
11 #include <linux/delay.h>
30 /* key debounce interval in milli-second */
52 * HiZ when de-activated to cause minmal side effect when scanning other
54 * driven with the inactive value.
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()
71 if (on && keypad->col_scan_delay_us) in activate_col()
72 fsleep(keypad->col_scan_delay_us); in activate_col()
79 for (col = 0; col < keypad->num_col_gpios; col++) 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()
88 return gpiod_get_value_cansleep(keypad->row_gpios[row]); in row_asserted()
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()
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()
114 struct input_dev *input_dev = keypad->input_dev; in matrix_keypad_scan()
115 const unsigned short *keycodes = input_dev->keycode; in matrix_keypad_scan()
119 /* de-activate all columns for scanning */ in matrix_keypad_scan()
124 for (row = 0; row < keypad->num_row_gpios; row++) in matrix_keypad_scan()
125 gpiod_direction_input(keypad->row_gpios[row]); in matrix_keypad_scan()
128 for (col = 0; col < keypad->num_col_gpios; col++) { in matrix_keypad_scan()
132 for (row = 0; row < keypad->num_row_gpios; row++) in matrix_keypad_scan()
139 for (col = 0; col < keypad->num_col_gpios; col++) { in matrix_keypad_scan()
142 bits_changed = keypad->last_key_state[col] ^ new_state[col]; in matrix_keypad_scan()
146 for (row = 0; row < keypad->num_row_gpios; row++) { in matrix_keypad_scan()
150 code = MATRIX_SCAN_CODE(row, col, keypad->row_shift); in matrix_keypad_scan()
159 memcpy(keypad->last_key_state, new_state, sizeof(new_state)); in matrix_keypad_scan()
164 scoped_guard(spinlock_irq, &keypad->lock) { in matrix_keypad_scan()
165 keypad->scan_pending = false; in matrix_keypad_scan()
174 guard(spinlock_irqsave)(&keypad->lock); in matrix_keypad_interrupt()
181 if (unlikely(keypad->scan_pending || keypad->stopped)) in matrix_keypad_interrupt()
185 keypad->scan_pending = true; in matrix_keypad_interrupt()
186 schedule_delayed_work(&keypad->work, in matrix_keypad_interrupt()
187 msecs_to_jiffies(keypad->debounce_ms)); in matrix_keypad_interrupt()
197 keypad->stopped = false; in matrix_keypad_start()
204 schedule_delayed_work(&keypad->work, 0); in matrix_keypad_start()
213 scoped_guard(spinlock_irq, &keypad->lock) { in matrix_keypad_stop()
214 keypad->stopped = true; in matrix_keypad_stop()
217 flush_delayed_work(&keypad->work); in matrix_keypad_stop()
229 for_each_clear_bit(i, keypad->wakeup_enabled_irqs, in matrix_keypad_enable_wakeup()
230 keypad->num_row_gpios) in matrix_keypad_enable_wakeup()
231 if (enable_irq_wake(keypad->row_irqs[i]) == 0) in matrix_keypad_enable_wakeup()
232 __set_bit(i, keypad->wakeup_enabled_irqs); in matrix_keypad_enable_wakeup()
239 for_each_set_bit(i, keypad->wakeup_enabled_irqs, in matrix_keypad_disable_wakeup()
240 keypad->num_row_gpios) { in matrix_keypad_disable_wakeup()
241 disable_irq_wake(keypad->row_irqs[i]); in matrix_keypad_disable_wakeup()
242 __clear_bit(i, keypad->wakeup_enabled_irqs); in matrix_keypad_disable_wakeup()
251 matrix_keypad_stop(keypad->input_dev); in matrix_keypad_suspend()
253 if (device_may_wakeup(&pdev->dev)) in matrix_keypad_suspend()
264 if (device_may_wakeup(&pdev->dev)) in matrix_keypad_resume()
267 matrix_keypad_start(keypad->input_dev); in matrix_keypad_resume()
283 nrow = gpiod_count(&pdev->dev, "row"); in matrix_keypad_init_gpio()
284 ncol = gpiod_count(&pdev->dev, "col"); in matrix_keypad_init_gpio()
286 dev_err(&pdev->dev, "missing row or column GPIOs\n"); in matrix_keypad_init_gpio()
287 return -EINVAL; in matrix_keypad_init_gpio()
290 keypad->num_row_gpios = nrow; in matrix_keypad_init_gpio()
291 keypad->num_col_gpios = ncol; in matrix_keypad_init_gpio()
293 active_low = device_property_read_bool(&pdev->dev, "gpio-activelow"); in matrix_keypad_init_gpio()
296 for (i = 0; i < keypad->num_col_gpios; i++) { in matrix_keypad_init_gpio()
297 keypad->col_gpios[i] = devm_gpiod_get_index(&pdev->dev, "col", in matrix_keypad_init_gpio()
299 err = PTR_ERR_OR_ZERO(keypad->col_gpios[i]); in matrix_keypad_init_gpio()
301 dev_err(&pdev->dev, in matrix_keypad_init_gpio()
307 gpiod_set_consumer_name(keypad->col_gpios[i], "matrix_kbd_col"); in matrix_keypad_init_gpio()
309 if (active_low ^ gpiod_is_active_low(keypad->col_gpios[i])) in matrix_keypad_init_gpio()
310 gpiod_toggle_active_low(keypad->col_gpios[i]); in matrix_keypad_init_gpio()
312 gpiod_direction_output(keypad->col_gpios[i], 1); in matrix_keypad_init_gpio()
315 for (i = 0; i < keypad->num_row_gpios; i++) { in matrix_keypad_init_gpio()
316 keypad->row_gpios[i] = devm_gpiod_get_index(&pdev->dev, "row", in matrix_keypad_init_gpio()
318 err = PTR_ERR_OR_ZERO(keypad->row_gpios[i]); in matrix_keypad_init_gpio()
320 dev_err(&pdev->dev, in matrix_keypad_init_gpio()
326 gpiod_set_consumer_name(keypad->row_gpios[i], "matrix_kbd_row"); in matrix_keypad_init_gpio()
328 if (active_low ^ gpiod_is_active_low(keypad->row_gpios[i])) in matrix_keypad_init_gpio()
329 gpiod_toggle_active_low(keypad->row_gpios[i]); in matrix_keypad_init_gpio()
342 for (i = 0; i < keypad->num_row_gpios; i++) { in matrix_keypad_setup_interrupts()
343 irq = gpiod_to_irq(keypad->row_gpios[i]); in matrix_keypad_setup_interrupts()
346 dev_err(&pdev->dev, in matrix_keypad_setup_interrupts()
352 err = devm_request_any_context_irq(&pdev->dev, irq, in matrix_keypad_setup_interrupts()
356 "matrix-keypad", keypad); in matrix_keypad_setup_interrupts()
358 dev_err(&pdev->dev, in matrix_keypad_setup_interrupts()
364 keypad->row_irqs[i] = irq; in matrix_keypad_setup_interrupts()
367 /* initialized as disabled - enabled by input->open */ in matrix_keypad_setup_interrupts()
380 keypad = devm_kzalloc(&pdev->dev, sizeof(*keypad), GFP_KERNEL); in matrix_keypad_probe()
382 return -ENOMEM; in matrix_keypad_probe()
384 input_dev = devm_input_allocate_device(&pdev->dev); in matrix_keypad_probe()
386 return -ENOMEM; in matrix_keypad_probe()
388 keypad->input_dev = input_dev; in matrix_keypad_probe()
389 keypad->stopped = true; in matrix_keypad_probe()
390 INIT_DELAYED_WORK(&keypad->work, matrix_keypad_scan); in matrix_keypad_probe()
391 spin_lock_init(&keypad->lock); in matrix_keypad_probe()
393 keypad->drive_inactive_cols = in matrix_keypad_probe()
394 device_property_read_bool(&pdev->dev, "drive-inactive-cols"); in matrix_keypad_probe()
395 device_property_read_u32(&pdev->dev, "debounce-delay-ms", in matrix_keypad_probe()
396 &keypad->debounce_ms); in matrix_keypad_probe()
397 device_property_read_u32(&pdev->dev, "col-scan-delay-us", in matrix_keypad_probe()
398 &keypad->col_scan_delay_us); in matrix_keypad_probe()
399 device_property_read_u32(&pdev->dev, "all-cols-on-delay-us", in matrix_keypad_probe()
400 &keypad->all_cols_on_delay_us); in matrix_keypad_probe()
406 keypad->row_shift = get_count_order(keypad->num_col_gpios); in matrix_keypad_probe()
412 input_dev->name = pdev->name; in matrix_keypad_probe()
413 input_dev->id.bustype = BUS_HOST; in matrix_keypad_probe()
414 input_dev->open = matrix_keypad_start; in matrix_keypad_probe()
415 input_dev->close = matrix_keypad_stop; in matrix_keypad_probe()
418 keypad->num_row_gpios, in matrix_keypad_probe()
419 keypad->num_col_gpios, in matrix_keypad_probe()
422 dev_err(&pdev->dev, "failed to build keymap\n"); in matrix_keypad_probe()
423 return -ENOMEM; in matrix_keypad_probe()
426 if (!device_property_read_bool(&pdev->dev, "linux,no-autorepeat")) in matrix_keypad_probe()
427 __set_bit(EV_REP, input_dev->evbit); in matrix_keypad_probe()
432 err = input_register_device(keypad->input_dev); in matrix_keypad_probe()
436 wakeup = device_property_read_bool(&pdev->dev, "wakeup-source") || in matrix_keypad_probe()
438 device_property_read_bool(&pdev->dev, "linux,wakeup"); in matrix_keypad_probe()
439 device_init_wakeup(&pdev->dev, wakeup); in matrix_keypad_probe()
448 { .compatible = "gpio-matrix-keypad" },
457 .name = "matrix-keypad",
467 MODULE_ALIAS("platform:matrix-keypad");