input/keyboard/ep93xx_keypad.c

3  * Driver for the Cirrus EP93xx matrix keypad controller.
7  * Based on the pxa27x matrix keypad controller by Rodolfo Giometti.
30 #include <linux/platform_data/keypad-ep93xx.h>
85 	struct ep93xx_keypad *keypad = dev_id;
86 	struct input_dev *input_dev = keypad->input_dev;
90 	status = __raw_readl(keypad->mmio_base + KEY_REG);
93 	key1 = keypad->keycodes[keycode];
96 	key2 = keypad->keycodes[keycode];
99 		if (keypad->key1 && key1 != keypad->key1 && key2 != keypad->key1)
100 			input_report_key(input_dev, keypad->key1, 0);
102 		if (keypad->key2 && key1 != keypad->key2 && key2 != keypad->key2)
103 			input_report_key(input_dev, keypad->key2, 0);
108 		keypad->key1 = key1;
109 		keypad->key2 = key2;
112 		if (keypad->key1 && key1 != keypad->key1)
113 			input_report_key(input_dev, keypad->key1, 0);
115 		if (keypad->key2 && key1 != keypad->key2)
116 			input_report_key(input_dev, keypad->key2, 0);
120 		keypad->key1 = key1;
121 		keypad->key2 = 0;
124 		input_report_key(input_dev, keypad->key1, 0);
125 		input_report_key(input_dev, keypad->key2, 0);
127 		keypad->key1 = keypad->key2 = 0;
134 static void ep93xx_keypad_config(struct ep93xx_keypad *keypad)
136 	struct ep93xx_keypad_platform_data *pdata = keypad->pdata;
139 	clk_set_rate(keypad->clk, pdata->clk_rate);
154 	__raw_writel(val, keypad->mmio_base + KEY_INIT);
159 	struct ep93xx_keypad *keypad = input_get_drvdata(pdev);
161 	if (!keypad->enabled) {
162 		ep93xx_keypad_config(keypad);
163 		clk_prepare_enable(keypad->clk);
164 		keypad->enabled = true;
172 	struct ep93xx_keypad *keypad = input_get_drvdata(pdev);
174 	if (keypad->enabled) {
175 		clk_disable_unprepare(keypad->clk);
176 		keypad->enabled = false;
184 	struct ep93xx_keypad *keypad = platform_get_drvdata(pdev);
185 	struct input_dev *input_dev = keypad->input_dev;
189 	if (keypad->enabled) {
190 		clk_disable(keypad->clk);
191 		keypad->enabled = false;
202 	struct ep93xx_keypad *keypad = platform_get_drvdata(pdev);
203 	struct input_dev *input_dev = keypad->input_dev;
208 		if (!keypad->enabled) {
209 			ep93xx_keypad_config(keypad);
210 			clk_enable(keypad->clk);
211 			keypad->enabled = true;
232 	struct ep93xx_keypad *keypad;
237 	keypad = devm_kzalloc(&pdev->dev, sizeof(*keypad), GFP_KERNEL);
238 	if (!keypad)
241 	keypad->pdata = dev_get_platdata(&pdev->dev);
242 	if (!keypad->pdata)
245 	keymap_data = keypad->pdata->keymap_data;
249 	keypad->irq = platform_get_irq(pdev, 0);
250 	if (keypad->irq < 0)
251 		return keypad->irq;
253 	keypad->mmio_base = devm_platform_ioremap_resource(pdev, 0);
254 	if (IS_ERR(keypad->mmio_base))
255 		return PTR_ERR(keypad->mmio_base);
266 	keypad->clk = devm_clk_get(&pdev->dev, NULL);
267 	if (IS_ERR(keypad->clk))
268 		return PTR_ERR(keypad->clk);
274 	keypad->input_dev = input_dev;
283 					 keypad->keycodes, input_dev);
287 	if (keypad->pdata->flags & EP93XX_KEYPAD_AUTOREPEAT)
289 	input_set_drvdata(input_dev, keypad);
291 	err = devm_request_irq(&pdev->dev, keypad->irq,
293 			       0, pdev->name, keypad);
301 	platform_set_drvdata(pdev, keypad);
304 	err = dev_pm_set_wake_irq(&pdev->dev, keypad->irq);
318 		.name	= "ep93xx-keypad",
329 MODULE_ALIAS("platform:ep93xx-keypad");