3  * Driver for the Cirrus EP93xx matrix keypad controller.
7  * Based on the pxa27x matrix keypad controller by Rodolfo Giometti.
28 #include <linux/platform_data/keypad-ep93xx.h>
31  * Keypad Interface Register offsets
82 	struct ep93xx_keypad *keypad = dev_id;  in ep93xx_keypad_irq_handler()  local
83 	struct input_dev *input_dev = keypad->input_dev;  in ep93xx_keypad_irq_handler()
87 	status = __raw_readl(keypad->mmio_base + KEY_REG);  in ep93xx_keypad_irq_handler()
90 	key1 = keypad->keycodes[keycode];  in ep93xx_keypad_irq_handler()
93 	key2 = keypad->keycodes[keycode];  in ep93xx_keypad_irq_handler()
96 		if (keypad->key1 && key1 != keypad->key1 && key2 != keypad->key1)  in ep93xx_keypad_irq_handler()
97 			input_report_key(input_dev, keypad->key1, 0);  in ep93xx_keypad_irq_handler()
99 		if (keypad->key2 && key1 != keypad->key2 && key2 != keypad->key2)  in ep93xx_keypad_irq_handler()
100 			input_report_key(input_dev, keypad->key2, 0);  in ep93xx_keypad_irq_handler()
105 		keypad->key1 = key1;  in ep93xx_keypad_irq_handler()
106 		keypad->key2 = key2;  in ep93xx_keypad_irq_handler()
109 		if (keypad->key1 && key1 != keypad->key1)  in ep93xx_keypad_irq_handler()
110 			input_report_key(input_dev, keypad->key1, 0);  in ep93xx_keypad_irq_handler()
112 		if (keypad->key2 && key1 != keypad->key2)  in ep93xx_keypad_irq_handler()
113 			input_report_key(input_dev, keypad->key2, 0);  in ep93xx_keypad_irq_handler()
117 		keypad->key1 = key1;  in ep93xx_keypad_irq_handler()
118 		keypad->key2 = 0;  in ep93xx_keypad_irq_handler()
121 		input_report_key(input_dev, keypad->key1, 0);  in ep93xx_keypad_irq_handler()
122 		input_report_key(input_dev, keypad->key2, 0);  in ep93xx_keypad_irq_handler()
124 		keypad->key1 = keypad->key2 = 0;  in ep93xx_keypad_irq_handler()
131 static void ep93xx_keypad_config(struct ep93xx_keypad *keypad)  in ep93xx_keypad_config()  argument
133 	struct ep93xx_keypad_platform_data *pdata = keypad->pdata;  in ep93xx_keypad_config()
136 	clk_set_rate(keypad->clk, pdata->clk_rate);  in ep93xx_keypad_config()
151 	__raw_writel(val, keypad->mmio_base + KEY_INIT);  in ep93xx_keypad_config()
156 	struct ep93xx_keypad *keypad = input_get_drvdata(pdev);  in ep93xx_keypad_open()  local
158 	if (!keypad->enabled) {  in ep93xx_keypad_open()
159 		ep93xx_keypad_config(keypad);  in ep93xx_keypad_open()
160 		clk_enable(keypad->clk);  in ep93xx_keypad_open()
161 		keypad->enabled = true;  in ep93xx_keypad_open()
169 	struct ep93xx_keypad *keypad = input_get_drvdata(pdev);  in ep93xx_keypad_close()  local
171 	if (keypad->enabled) {  in ep93xx_keypad_close()
172 		clk_disable(keypad->clk);  in ep93xx_keypad_close()
173 		keypad->enabled = false;  in ep93xx_keypad_close()
182 	struct ep93xx_keypad *keypad = platform_get_drvdata(pdev);  in ep93xx_keypad_suspend()  local
183 	struct input_dev *input_dev = keypad->input_dev;  in ep93xx_keypad_suspend()
187 	if (keypad->enabled) {  in ep93xx_keypad_suspend()
188 		clk_disable(keypad->clk);  in ep93xx_keypad_suspend()
189 		keypad->enabled = false;  in ep93xx_keypad_suspend()
195 		enable_irq_wake(keypad->irq);  in ep93xx_keypad_suspend()
203 	struct ep93xx_keypad *keypad = platform_get_drvdata(pdev);  in ep93xx_keypad_resume()  local
204 	struct input_dev *input_dev = keypad->input_dev;  in ep93xx_keypad_resume()
207 		disable_irq_wake(keypad->irq);  in ep93xx_keypad_resume()
212 		if (!keypad->enabled) {  in ep93xx_keypad_resume()
213 			ep93xx_keypad_config(keypad);  in ep93xx_keypad_resume()
214 			clk_enable(keypad->clk);  in ep93xx_keypad_resume()
215 			keypad->enabled = true;  in ep93xx_keypad_resume()
230 	struct ep93xx_keypad *keypad;  in ep93xx_keypad_probe()  local
236 	keypad = kzalloc(sizeof(struct ep93xx_keypad), GFP_KERNEL);  in ep93xx_keypad_probe()
237 	if (!keypad)  in ep93xx_keypad_probe()
240 	keypad->pdata = dev_get_platdata(&pdev->dev);  in ep93xx_keypad_probe()
241 	if (!keypad->pdata) {  in ep93xx_keypad_probe()
246 	keymap_data = keypad->pdata->keymap_data;  in ep93xx_keypad_probe()
252 	keypad->irq = platform_get_irq(pdev, 0);  in ep93xx_keypad_probe()
253 	if (keypad->irq < 0) {  in ep93xx_keypad_probe()
254 		err = keypad->irq;  in ep93xx_keypad_probe()
270 	keypad->mmio_base = ioremap(res->start, resource_size(res));  in ep93xx_keypad_probe()
271 	if (keypad->mmio_base == NULL) {  in ep93xx_keypad_probe()
280 	keypad->clk = clk_get(&pdev->dev, NULL);  in ep93xx_keypad_probe()
281 	if (IS_ERR(keypad->clk)) {  in ep93xx_keypad_probe()
282 		err = PTR_ERR(keypad->clk);  in ep93xx_keypad_probe()
292 	keypad->input_dev = input_dev;  in ep93xx_keypad_probe()
302 					 keypad->keycodes, input_dev);  in ep93xx_keypad_probe()
306 	if (keypad->pdata->flags & EP93XX_KEYPAD_AUTOREPEAT)  in ep93xx_keypad_probe()
308 	input_set_drvdata(input_dev, keypad);  in ep93xx_keypad_probe()
310 	err = request_irq(keypad->irq, ep93xx_keypad_irq_handler,  in ep93xx_keypad_probe()
311 			  0, pdev->name, keypad);  in ep93xx_keypad_probe()
319 	platform_set_drvdata(pdev, keypad);  in ep93xx_keypad_probe()
325 	free_irq(keypad->irq, keypad);  in ep93xx_keypad_probe()
329 	clk_put(keypad->clk);  in ep93xx_keypad_probe()
333 	iounmap(keypad->mmio_base);  in ep93xx_keypad_probe()
337 	kfree(keypad);  in ep93xx_keypad_probe()
343 	struct ep93xx_keypad *keypad = platform_get_drvdata(pdev);  in ep93xx_keypad_remove()  local
346 	free_irq(keypad->irq, keypad);  in ep93xx_keypad_remove()
348 	if (keypad->enabled)  in ep93xx_keypad_remove()
349 		clk_disable(keypad->clk);  in ep93xx_keypad_remove()
350 	clk_put(keypad->clk);  in ep93xx_keypad_remove()
352 	input_unregister_device(keypad->input_dev);  in ep93xx_keypad_remove()
356 	iounmap(keypad->mmio_base);  in ep93xx_keypad_remove()
361 	kfree(keypad);  in ep93xx_keypad_remove()
368 		.name	= "ep93xx-keypad",
378 MODULE_DESCRIPTION("EP93xx Matrix Keypad Controller");
379 MODULE_ALIAS("platform:ep93xx-keypad");