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>
34  * Keypad Interface Register offsets
85 	struct ep93xx_keypad *keypad = dev_id;  in ep93xx_keypad_irq_handler()  local
86 	struct input_dev *input_dev = keypad->input_dev;  in ep93xx_keypad_irq_handler()
90 	status = __raw_readl(keypad->mmio_base + KEY_REG);  in ep93xx_keypad_irq_handler()
93 	key1 = keypad->keycodes[keycode];  in ep93xx_keypad_irq_handler()
96 	key2 = keypad->keycodes[keycode];  in ep93xx_keypad_irq_handler()
99 		if (keypad->key1 && key1 != keypad->key1 && key2 != keypad->key1)  in ep93xx_keypad_irq_handler()
100 			input_report_key(input_dev, keypad->key1, 0);  in ep93xx_keypad_irq_handler()
102 		if (keypad->key2 && key1 != keypad->key2 && key2 != keypad->key2)  in ep93xx_keypad_irq_handler()
103 			input_report_key(input_dev, keypad->key2, 0);  in ep93xx_keypad_irq_handler()
108 		keypad->key1 = key1;  in ep93xx_keypad_irq_handler()
109 		keypad->key2 = key2;  in ep93xx_keypad_irq_handler()
112 		if (keypad->key1 && key1 != keypad->key1)  in ep93xx_keypad_irq_handler()
113 			input_report_key(input_dev, keypad->key1, 0);  in ep93xx_keypad_irq_handler()
115 		if (keypad->key2 && key1 != keypad->key2)  in ep93xx_keypad_irq_handler()
116 			input_report_key(input_dev, keypad->key2, 0);  in ep93xx_keypad_irq_handler()
120 		keypad->key1 = key1;  in ep93xx_keypad_irq_handler()
121 		keypad->key2 = 0;  in ep93xx_keypad_irq_handler()
124 		input_report_key(input_dev, keypad->key1, 0);  in ep93xx_keypad_irq_handler()
125 		input_report_key(input_dev, keypad->key2, 0);  in ep93xx_keypad_irq_handler()
127 		keypad->key1 = keypad->key2 = 0;  in ep93xx_keypad_irq_handler()
134 static void ep93xx_keypad_config(struct ep93xx_keypad *keypad)  in ep93xx_keypad_config()  argument
136 	struct ep93xx_keypad_platform_data *pdata = keypad->pdata;  in ep93xx_keypad_config()
139 	clk_set_rate(keypad->clk, pdata->clk_rate);  in ep93xx_keypad_config()
154 	__raw_writel(val, keypad->mmio_base + KEY_INIT);  in ep93xx_keypad_config()
159 	struct ep93xx_keypad *keypad = input_get_drvdata(pdev);  in ep93xx_keypad_open()  local
161 	if (!keypad->enabled) {  in ep93xx_keypad_open()
162 		ep93xx_keypad_config(keypad);  in ep93xx_keypad_open()
163 		clk_prepare_enable(keypad->clk);  in ep93xx_keypad_open()
164 		keypad->enabled = true;  in ep93xx_keypad_open()
172 	struct ep93xx_keypad *keypad = input_get_drvdata(pdev);  in ep93xx_keypad_close()  local
174 	if (keypad->enabled) {  in ep93xx_keypad_close()
175 		clk_disable_unprepare(keypad->clk);  in ep93xx_keypad_close()
176 		keypad->enabled = false;  in ep93xx_keypad_close()
184 	struct ep93xx_keypad *keypad = platform_get_drvdata(pdev);  in ep93xx_keypad_suspend()  local
185 	struct input_dev *input_dev = keypad->input_dev;  in ep93xx_keypad_suspend()
189 	if (keypad->enabled) {  in ep93xx_keypad_suspend()
190 		clk_disable(keypad->clk);  in ep93xx_keypad_suspend()
191 		keypad->enabled = false;  in ep93xx_keypad_suspend()
202 	struct ep93xx_keypad *keypad = platform_get_drvdata(pdev);  in ep93xx_keypad_resume()  local
203 	struct input_dev *input_dev = keypad->input_dev;  in ep93xx_keypad_resume()
208 		if (!keypad->enabled) {  in ep93xx_keypad_resume()
209 			ep93xx_keypad_config(keypad);  in ep93xx_keypad_resume()
210 			clk_enable(keypad->clk);  in ep93xx_keypad_resume()
211 			keypad->enabled = true;  in ep93xx_keypad_resume()
232 	struct ep93xx_keypad *keypad;  in ep93xx_keypad_probe()  local
237 	keypad = devm_kzalloc(&pdev->dev, sizeof(*keypad), GFP_KERNEL);  in ep93xx_keypad_probe()
238 	if (!keypad)  in ep93xx_keypad_probe()
241 	keypad->pdata = dev_get_platdata(&pdev->dev);  in ep93xx_keypad_probe()
242 	if (!keypad->pdata)  in ep93xx_keypad_probe()
245 	keymap_data = keypad->pdata->keymap_data;  in ep93xx_keypad_probe()
249 	keypad->irq = platform_get_irq(pdev, 0);  in ep93xx_keypad_probe()
250 	if (keypad->irq < 0)  in ep93xx_keypad_probe()
251 		return keypad->irq;  in ep93xx_keypad_probe()
253 	keypad->mmio_base = devm_platform_ioremap_resource(pdev, 0);  in ep93xx_keypad_probe()
254 	if (IS_ERR(keypad->mmio_base))  in ep93xx_keypad_probe()
255 		return PTR_ERR(keypad->mmio_base);  in ep93xx_keypad_probe()
266 	keypad->clk = devm_clk_get(&pdev->dev, NULL);  in ep93xx_keypad_probe()
267 	if (IS_ERR(keypad->clk))  in ep93xx_keypad_probe()
268 		return PTR_ERR(keypad->clk);  in ep93xx_keypad_probe()
274 	keypad->input_dev = input_dev;  in ep93xx_keypad_probe()
283 					 keypad->keycodes, input_dev);  in ep93xx_keypad_probe()
287 	if (keypad->pdata->flags & EP93XX_KEYPAD_AUTOREPEAT)  in ep93xx_keypad_probe()
289 	input_set_drvdata(input_dev, keypad);  in ep93xx_keypad_probe()
291 	err = devm_request_irq(&pdev->dev, keypad->irq,  in ep93xx_keypad_probe()
293 			       0, pdev->name, keypad);  in ep93xx_keypad_probe()
301 	platform_set_drvdata(pdev, keypad);  in ep93xx_keypad_probe()
304 	err = dev_pm_set_wake_irq(&pdev->dev, keypad->irq);  in ep93xx_keypad_probe()
320 		.name	= "ep93xx-keypad",
330 MODULE_DESCRIPTION("EP93xx Matrix Keypad Controller");
331 MODULE_ALIAS("platform:ep93xx-keypad");