input/keyboard/tc3589x-keypad.c

21 /* Maximum supported keypad matrix row/columns size */
25 /* keypad related Constants */
73  * struct tc3589x_keypad_platform_data - platform specific keypad data
80  * @enable_wakeup:      specifies if keypad event can wake up system from sleep
95  * struct tc_keypad - data structure used by keypad driver
98  * @board:      keypad platform device
102  * @keypad_stopped: holds keypad status
114 static int tc3589x_keypad_init_key_hardware(struct tc_keypad *keypad)
117 	struct tc3589x *tc3589x = keypad->tc3589x;
118 	const struct tc3589x_keypad_platform_data *board = keypad->board;
151 	/* Start of initialise keypad GPIOs */
191 	struct tc_keypad *keypad = dev;
192 	struct tc3589x *tc3589x = keypad->tc3589x;
211 		input_event(keypad->input, EV_MSC, MSC_SCAN, code);
212 		input_report_key(keypad->input, keypad->keymap[code], !up);
213 		input_sync(keypad->input);
226 static int tc3589x_keypad_enable(struct tc_keypad *keypad)
228 	struct tc3589x *tc3589x = keypad->tc3589x;
231 	/* pull the keypad module out of reset */
241 	/* enable the keypad clock */
257 	keypad->keypad_stopped = false;
262 static int tc3589x_keypad_disable(struct tc_keypad *keypad)
264 	struct tc3589x *tc3589x = keypad->tc3589x;
279 	/* disable the keypad module */
284 	/* put the keypad module into reset */
287 	keypad->keypad_stopped = true;
295 	struct tc_keypad *keypad = input_get_drvdata(input);
297 	/* enable the keypad module */
298 	error = tc3589x_keypad_enable(keypad);
300 		dev_err(&input->dev, "failed to enable keypad module\n");
304 	error = tc3589x_keypad_init_key_hardware(keypad);
306 		dev_err(&input->dev, "failed to configure keypad module\n");
315 	struct tc_keypad *keypad = input_get_drvdata(input);
317 	/* disable the keypad module */
318 	tc3589x_keypad_disable(keypad);
337 	of_property_read_u32(np, "keypad,num-columns", &cols);
338 	of_property_read_u32(np, "keypad,num-rows", &rows);
344 			"keypad columns/rows not properly specified (%ux%u)\n",
377 	struct tc_keypad *keypad;
384 		dev_err(&pdev->dev, "invalid keypad platform data\n");
392 	keypad = devm_kzalloc(&pdev->dev, sizeof(struct tc_keypad),
394 	if (!keypad)
403 	keypad->board = plat;
404 	keypad->input = input;
405 	keypad->tc3589x = tc3589x;
422 	keypad->keymap = input->keycode;
428 	input_set_drvdata(input, keypad);
430 	tc3589x_keypad_disable(keypad);
435 					  "tc3589x-keypad", keypad);
449 	/* let platform decide if keypad is a wakeup source or not */
453 	platform_set_drvdata(pdev, keypad);
461 	struct tc_keypad *keypad = platform_get_drvdata(pdev);
464 	/* keypad is already off; we do nothing */
465 	if (keypad->keypad_stopped)
470 		tc3589x_keypad_disable(keypad);
480 	struct tc_keypad *keypad = platform_get_drvdata(pdev);
483 	if (!keypad->keypad_stopped)
488 		tc3589x_keypad_enable(keypad);
500 		.name	= "tc3589x-keypad",
510 MODULE_ALIAS("platform:tc3589x-keypad");