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1/*
2 * Driver for the Cirrus EP93xx matrix keypad controller.
3 *
4 * Copyright (c) 2008 H Hartley Sweeten <hsweeten@visionengravers.com>
5 *
6 * Based on the pxa27x matrix keypad controller by Rodolfo Giometti.
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 *
12 * NOTE:
13 *
14 * The 3-key reset is triggered by pressing the 3 keys in
15 * Row 0, Columns 2, 4, and 7 at the same time. This action can
16 * be disabled by setting the EP93XX_KEYPAD_DISABLE_3_KEY flag.
17 *
18 * Normal operation for the matrix does not autorepeat the key press.
19 * This action can be enabled by setting the EP93XX_KEYPAD_AUTOREPEAT
20 * flag.
21 */
22
23#include <linux/module.h>
24#include <linux/platform_device.h>
25#include <linux/interrupt.h>
26#include <linux/clk.h>
27#include <linux/io.h>
28#include <linux/input/matrix_keypad.h>
29#include <linux/slab.h>
30
31#include <mach/hardware.h>
32#include <mach/ep93xx_keypad.h>
33
34/*
35 * Keypad Interface Register offsets
36 */
37#define KEY_INIT 0x00 /* Key Scan Initialization register */
38#define KEY_DIAG 0x04 /* Key Scan Diagnostic register */
39#define KEY_REG 0x08 /* Key Value Capture register */
40
41/* Key Scan Initialization Register bit defines */
42#define KEY_INIT_DBNC_MASK (0x00ff0000)
43#define KEY_INIT_DBNC_SHIFT (16)
44#define KEY_INIT_DIS3KY (1<<15)
45#define KEY_INIT_DIAG (1<<14)
46#define KEY_INIT_BACK (1<<13)
47#define KEY_INIT_T2 (1<<12)
48#define KEY_INIT_PRSCL_MASK (0x000003ff)
49#define KEY_INIT_PRSCL_SHIFT (0)
50
51/* Key Scan Diagnostic Register bit defines */
52#define KEY_DIAG_MASK (0x0000003f)
53#define KEY_DIAG_SHIFT (0)
54
55/* Key Value Capture Register bit defines */
56#define KEY_REG_K (1<<15)
57#define KEY_REG_INT (1<<14)
58#define KEY_REG_2KEYS (1<<13)
59#define KEY_REG_1KEY (1<<12)
60#define KEY_REG_KEY2_MASK (0x00000fc0)
61#define KEY_REG_KEY2_SHIFT (6)
62#define KEY_REG_KEY1_MASK (0x0000003f)
63#define KEY_REG_KEY1_SHIFT (0)
64
65#define EP93XX_MATRIX_SIZE (EP93XX_MATRIX_ROWS * EP93XX_MATRIX_COLS)
66
67struct ep93xx_keypad {
68 struct ep93xx_keypad_platform_data *pdata;
69 struct input_dev *input_dev;
70 struct clk *clk;
71
72 void __iomem *mmio_base;
73
74 unsigned short keycodes[EP93XX_MATRIX_SIZE];
75
76 int key1;
77 int key2;
78
79 int irq;
80
81 bool enabled;
82};
83
84static irqreturn_t ep93xx_keypad_irq_handler(int irq, void *dev_id)
85{
86 struct ep93xx_keypad *keypad = dev_id;
87 struct input_dev *input_dev = keypad->input_dev;
88 unsigned int status;
89 int keycode, key1, key2;
90
91 status = __raw_readl(keypad->mmio_base + KEY_REG);
92
93 keycode = (status & KEY_REG_KEY1_MASK) >> KEY_REG_KEY1_SHIFT;
94 key1 = keypad->keycodes[keycode];
95
96 keycode = (status & KEY_REG_KEY2_MASK) >> KEY_REG_KEY2_SHIFT;
97 key2 = keypad->keycodes[keycode];
98
99 if (status & KEY_REG_2KEYS) {
100 if (keypad->key1 && key1 != keypad->key1 && key2 != keypad->key1)
101 input_report_key(input_dev, keypad->key1, 0);
102
103 if (keypad->key2 && key1 != keypad->key2 && key2 != keypad->key2)
104 input_report_key(input_dev, keypad->key2, 0);
105
106 input_report_key(input_dev, key1, 1);
107 input_report_key(input_dev, key2, 1);
108
109 keypad->key1 = key1;
110 keypad->key2 = key2;
111
112 } else if (status & KEY_REG_1KEY) {
113 if (keypad->key1 && key1 != keypad->key1)
114 input_report_key(input_dev, keypad->key1, 0);
115
116 if (keypad->key2 && key1 != keypad->key2)
117 input_report_key(input_dev, keypad->key2, 0);
118
119 input_report_key(input_dev, key1, 1);
120
121 keypad->key1 = key1;
122 keypad->key2 = 0;
123
124 } else {
125 input_report_key(input_dev, keypad->key1, 0);
126 input_report_key(input_dev, keypad->key2, 0);
127
128 keypad->key1 = keypad->key2 = 0;
129 }
130 input_sync(input_dev);
131
132 return IRQ_HANDLED;
133}
134
135static void ep93xx_keypad_config(struct ep93xx_keypad *keypad)
136{
137 struct ep93xx_keypad_platform_data *pdata = keypad->pdata;
138 unsigned int val = 0;
139
140 if (pdata->flags & EP93XX_KEYPAD_KDIV)
141 clk_set_rate(keypad->clk, EP93XX_KEYTCHCLK_DIV4);
142 else
143 clk_set_rate(keypad->clk, EP93XX_KEYTCHCLK_DIV16);
144
145 if (pdata->flags & EP93XX_KEYPAD_DISABLE_3_KEY)
146 val |= KEY_INIT_DIS3KY;
147 if (pdata->flags & EP93XX_KEYPAD_DIAG_MODE)
148 val |= KEY_INIT_DIAG;
149 if (pdata->flags & EP93XX_KEYPAD_BACK_DRIVE)
150 val |= KEY_INIT_BACK;
151 if (pdata->flags & EP93XX_KEYPAD_TEST_MODE)
152 val |= KEY_INIT_T2;
153
154 val |= ((pdata->debounce << KEY_INIT_DBNC_SHIFT) & KEY_INIT_DBNC_MASK);
155
156 val |= ((pdata->prescale << KEY_INIT_PRSCL_SHIFT) & KEY_INIT_PRSCL_MASK);
157
158 __raw_writel(val, keypad->mmio_base + KEY_INIT);
159}
160
161static int ep93xx_keypad_open(struct input_dev *pdev)
162{
163 struct ep93xx_keypad *keypad = input_get_drvdata(pdev);
164
165 if (!keypad->enabled) {
166 ep93xx_keypad_config(keypad);
167 clk_enable(keypad->clk);
168 keypad->enabled = true;
169 }
170
171 return 0;
172}
173
174static void ep93xx_keypad_close(struct input_dev *pdev)
175{
176 struct ep93xx_keypad *keypad = input_get_drvdata(pdev);
177
178 if (keypad->enabled) {
179 clk_disable(keypad->clk);
180 keypad->enabled = false;
181 }
182}
183
184
185#ifdef CONFIG_PM
186/*
187 * NOTE: I don't know if this is correct, or will work on the ep93xx.
188 *
189 * None of the existing ep93xx drivers have power management support.
190 * But, this is basically what the pxa27x_keypad driver does.
191 */
192static int ep93xx_keypad_suspend(struct platform_device *pdev,
193 pm_message_t state)
194{
195 struct ep93xx_keypad *keypad = platform_get_drvdata(pdev);
196 struct input_dev *input_dev = keypad->input_dev;
197
198 mutex_lock(&input_dev->mutex);
199
200 if (keypad->enabled) {
201 clk_disable(keypad->clk);
202 keypad->enabled = false;
203 }
204
205 mutex_unlock(&input_dev->mutex);
206
207 if (device_may_wakeup(&pdev->dev))
208 enable_irq_wake(keypad->irq);
209
210 return 0;
211}
212
213static int ep93xx_keypad_resume(struct platform_device *pdev)
214{
215 struct ep93xx_keypad *keypad = platform_get_drvdata(pdev);
216 struct input_dev *input_dev = keypad->input_dev;
217
218 if (device_may_wakeup(&pdev->dev))
219 disable_irq_wake(keypad->irq);
220
221 mutex_lock(&input_dev->mutex);
222
223 if (input_dev->users) {
224 if (!keypad->enabled) {
225 ep93xx_keypad_config(keypad);
226 clk_enable(keypad->clk);
227 keypad->enabled = true;
228 }
229 }
230
231 mutex_unlock(&input_dev->mutex);
232
233 return 0;
234}
235#else /* !CONFIG_PM */
236#define ep93xx_keypad_suspend NULL
237#define ep93xx_keypad_resume NULL
238#endif /* !CONFIG_PM */
239
240static int __devinit ep93xx_keypad_probe(struct platform_device *pdev)
241{
242 struct ep93xx_keypad *keypad;
243 const struct matrix_keymap_data *keymap_data;
244 struct input_dev *input_dev;
245 struct resource *res;
246 int err;
247
248 keypad = kzalloc(sizeof(struct ep93xx_keypad), GFP_KERNEL);
249 if (!keypad)
250 return -ENOMEM;
251
252 keypad->pdata = pdev->dev.platform_data;
253 if (!keypad->pdata) {
254 err = -EINVAL;
255 goto failed_free;
256 }
257
258 keymap_data = keypad->pdata->keymap_data;
259 if (!keymap_data) {
260 err = -EINVAL;
261 goto failed_free;
262 }
263
264 keypad->irq = platform_get_irq(pdev, 0);
265 if (!keypad->irq) {
266 err = -ENXIO;
267 goto failed_free;
268 }
269
270 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
271 if (!res) {
272 err = -ENXIO;
273 goto failed_free;
274 }
275
276 res = request_mem_region(res->start, resource_size(res), pdev->name);
277 if (!res) {
278 err = -EBUSY;
279 goto failed_free;
280 }
281
282 keypad->mmio_base = ioremap(res->start, resource_size(res));
283 if (keypad->mmio_base == NULL) {
284 err = -ENXIO;
285 goto failed_free_mem;
286 }
287
288 err = ep93xx_keypad_acquire_gpio(pdev);
289 if (err)
290 goto failed_free_io;
291
292 keypad->clk = clk_get(&pdev->dev, NULL);
293 if (IS_ERR(keypad->clk)) {
294 err = PTR_ERR(keypad->clk);
295 goto failed_free_gpio;
296 }
297
298 input_dev = input_allocate_device();
299 if (!input_dev) {
300 err = -ENOMEM;
301 goto failed_put_clk;
302 }
303
304 keypad->input_dev = input_dev;
305
306 input_dev->name = pdev->name;
307 input_dev->id.bustype = BUS_HOST;
308 input_dev->open = ep93xx_keypad_open;
309 input_dev->close = ep93xx_keypad_close;
310 input_dev->dev.parent = &pdev->dev;
311 input_dev->keycode = keypad->keycodes;
312 input_dev->keycodesize = sizeof(keypad->keycodes[0]);
313 input_dev->keycodemax = ARRAY_SIZE(keypad->keycodes);
314
315 input_set_drvdata(input_dev, keypad);
316
317 input_dev->evbit[0] = BIT_MASK(EV_KEY);
318 if (keypad->pdata->flags & EP93XX_KEYPAD_AUTOREPEAT)
319 input_dev->evbit[0] |= BIT_MASK(EV_REP);
320
321 matrix_keypad_build_keymap(keymap_data, 3,
322 input_dev->keycode, input_dev->keybit);
323 platform_set_drvdata(pdev, keypad);
324
325 err = request_irq(keypad->irq, ep93xx_keypad_irq_handler,
326 IRQF_DISABLED, pdev->name, keypad);
327 if (err)
328 goto failed_free_dev;
329
330 err = input_register_device(input_dev);
331 if (err)
332 goto failed_free_irq;
333
334 device_init_wakeup(&pdev->dev, 1);
335
336 return 0;
337
338failed_free_irq:
339 free_irq(keypad->irq, pdev);
340 platform_set_drvdata(pdev, NULL);
341failed_free_dev:
342 input_free_device(input_dev);
343failed_put_clk:
344 clk_put(keypad->clk);
345failed_free_gpio:
346 ep93xx_keypad_release_gpio(pdev);
347failed_free_io:
348 iounmap(keypad->mmio_base);
349failed_free_mem:
350 release_mem_region(res->start, resource_size(res));
351failed_free:
352 kfree(keypad);
353 return err;
354}
355
356static int __devexit ep93xx_keypad_remove(struct platform_device *pdev)
357{
358 struct ep93xx_keypad *keypad = platform_get_drvdata(pdev);
359 struct resource *res;
360
361 free_irq(keypad->irq, pdev);
362
363 platform_set_drvdata(pdev, NULL);
364
365 if (keypad->enabled)
366 clk_disable(keypad->clk);
367 clk_put(keypad->clk);
368
369 input_unregister_device(keypad->input_dev);
370
371 ep93xx_keypad_release_gpio(pdev);
372
373 iounmap(keypad->mmio_base);
374
375 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
376 release_mem_region(res->start, resource_size(res));
377
378 kfree(keypad);
379
380 return 0;
381}
382
383static struct platform_driver ep93xx_keypad_driver = {
384 .driver = {
385 .name = "ep93xx-keypad",
386 .owner = THIS_MODULE,
387 },
388 .probe = ep93xx_keypad_probe,
389 .remove = __devexit_p(ep93xx_keypad_remove),
390 .suspend = ep93xx_keypad_suspend,
391 .resume = ep93xx_keypad_resume,
392};
393
394static int __init ep93xx_keypad_init(void)
395{
396 return platform_driver_register(&ep93xx_keypad_driver);
397}
398
399static void __exit ep93xx_keypad_exit(void)
400{
401 platform_driver_unregister(&ep93xx_keypad_driver);
402}
403
404module_init(ep93xx_keypad_init);
405module_exit(ep93xx_keypad_exit);
406
407MODULE_LICENSE("GPL");
408MODULE_AUTHOR("H Hartley Sweeten <hsweeten@visionengravers.com>");
409MODULE_DESCRIPTION("EP93xx Matrix Keypad Controller");
410MODULE_ALIAS("platform:ep93xx-keypad");
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Driver for the Cirrus EP93xx matrix keypad controller.
4 *
5 * Copyright (c) 2008 H Hartley Sweeten <hsweeten@visionengravers.com>
6 *
7 * Based on the pxa27x matrix keypad controller by Rodolfo Giometti.
8 *
9 */
10
11#include <linux/bits.h>
12#include <linux/mod_devicetable.h>
13#include <linux/module.h>
14#include <linux/platform_device.h>
15#include <linux/property.h>
16#include <linux/interrupt.h>
17#include <linux/clk.h>
18#include <linux/io.h>
19#include <linux/input.h>
20#include <linux/input/matrix_keypad.h>
21#include <linux/slab.h>
22#include <linux/soc/cirrus/ep93xx.h>
23#include <linux/pm_wakeirq.h>
24
25/*
26 * Keypad Interface Register offsets
27 */
28#define KEY_INIT 0x00 /* Key Scan Initialization register */
29#define KEY_DIAG 0x04 /* Key Scan Diagnostic register */
30#define KEY_REG 0x08 /* Key Value Capture register */
31
32/* Key Scan Initialization Register bit defines */
33#define KEY_INIT_DBNC_MASK GENMASK(23, 16)
34#define KEY_INIT_DBNC_SHIFT 16
35#define KEY_INIT_DIS3KY BIT(15)
36#define KEY_INIT_DIAG BIT(14)
37#define KEY_INIT_BACK BIT(13)
38#define KEY_INIT_T2 BIT(12)
39#define KEY_INIT_PRSCL_MASK GENMASK(9, 0)
40#define KEY_INIT_PRSCL_SHIFT 0
41
42/* Key Scan Diagnostic Register bit defines */
43#define KEY_DIAG_MASK GENMASK(5, 0)
44#define KEY_DIAG_SHIFT 0
45
46/* Key Value Capture Register bit defines */
47#define KEY_REG_K BIT(15)
48#define KEY_REG_INT BIT(14)
49#define KEY_REG_2KEYS BIT(13)
50#define KEY_REG_1KEY BIT(12)
51#define KEY_REG_KEY2_MASK GENMASK(11, 6)
52#define KEY_REG_KEY2_SHIFT 6
53#define KEY_REG_KEY1_MASK GENMASK(5, 0)
54#define KEY_REG_KEY1_SHIFT 0
55
56#define EP93XX_MATRIX_ROWS (8)
57#define EP93XX_MATRIX_COLS (8)
58
59#define EP93XX_MATRIX_SIZE (EP93XX_MATRIX_ROWS * EP93XX_MATRIX_COLS)
60
61struct ep93xx_keypad {
62 struct input_dev *input_dev;
63 struct clk *clk;
64 unsigned int debounce;
65 u16 prescale;
66
67 void __iomem *mmio_base;
68
69 unsigned short keycodes[EP93XX_MATRIX_SIZE];
70
71 int key1;
72 int key2;
73
74 int irq;
75
76 bool enabled;
77};
78
79static irqreturn_t ep93xx_keypad_irq_handler(int irq, void *dev_id)
80{
81 struct ep93xx_keypad *keypad = dev_id;
82 struct input_dev *input_dev = keypad->input_dev;
83 unsigned int status;
84 int keycode, key1, key2;
85
86 status = __raw_readl(keypad->mmio_base + KEY_REG);
87
88 keycode = (status & KEY_REG_KEY1_MASK) >> KEY_REG_KEY1_SHIFT;
89 key1 = keypad->keycodes[keycode];
90
91 keycode = (status & KEY_REG_KEY2_MASK) >> KEY_REG_KEY2_SHIFT;
92 key2 = keypad->keycodes[keycode];
93
94 if (status & KEY_REG_2KEYS) {
95 if (keypad->key1 && key1 != keypad->key1 && key2 != keypad->key1)
96 input_report_key(input_dev, keypad->key1, 0);
97
98 if (keypad->key2 && key1 != keypad->key2 && key2 != keypad->key2)
99 input_report_key(input_dev, keypad->key2, 0);
100
101 input_report_key(input_dev, key1, 1);
102 input_report_key(input_dev, key2, 1);
103
104 keypad->key1 = key1;
105 keypad->key2 = key2;
106
107 } else if (status & KEY_REG_1KEY) {
108 if (keypad->key1 && key1 != keypad->key1)
109 input_report_key(input_dev, keypad->key1, 0);
110
111 if (keypad->key2 && key1 != keypad->key2)
112 input_report_key(input_dev, keypad->key2, 0);
113
114 input_report_key(input_dev, key1, 1);
115
116 keypad->key1 = key1;
117 keypad->key2 = 0;
118
119 } else {
120 input_report_key(input_dev, keypad->key1, 0);
121 input_report_key(input_dev, keypad->key2, 0);
122
123 keypad->key1 = keypad->key2 = 0;
124 }
125 input_sync(input_dev);
126
127 return IRQ_HANDLED;
128}
129
130static void ep93xx_keypad_config(struct ep93xx_keypad *keypad)
131{
132 unsigned int val = 0;
133
134 val |= (keypad->debounce << KEY_INIT_DBNC_SHIFT) & KEY_INIT_DBNC_MASK;
135
136 val |= (keypad->prescale << KEY_INIT_PRSCL_SHIFT) & KEY_INIT_PRSCL_MASK;
137
138 __raw_writel(val, keypad->mmio_base + KEY_INIT);
139}
140
141static int ep93xx_keypad_open(struct input_dev *pdev)
142{
143 struct ep93xx_keypad *keypad = input_get_drvdata(pdev);
144
145 if (!keypad->enabled) {
146 ep93xx_keypad_config(keypad);
147 clk_prepare_enable(keypad->clk);
148 keypad->enabled = true;
149 }
150
151 return 0;
152}
153
154static void ep93xx_keypad_close(struct input_dev *pdev)
155{
156 struct ep93xx_keypad *keypad = input_get_drvdata(pdev);
157
158 if (keypad->enabled) {
159 clk_disable_unprepare(keypad->clk);
160 keypad->enabled = false;
161 }
162}
163
164
165static int ep93xx_keypad_suspend(struct device *dev)
166{
167 struct platform_device *pdev = to_platform_device(dev);
168 struct ep93xx_keypad *keypad = platform_get_drvdata(pdev);
169 struct input_dev *input_dev = keypad->input_dev;
170
171 guard(mutex)(&input_dev->mutex);
172
173 if (keypad->enabled) {
174 clk_disable(keypad->clk);
175 keypad->enabled = false;
176 }
177
178 return 0;
179}
180
181static int ep93xx_keypad_resume(struct device *dev)
182{
183 struct platform_device *pdev = to_platform_device(dev);
184 struct ep93xx_keypad *keypad = platform_get_drvdata(pdev);
185 struct input_dev *input_dev = keypad->input_dev;
186
187 guard(mutex)(&input_dev->mutex);
188
189 if (input_device_enabled(input_dev)) {
190 if (!keypad->enabled) {
191 ep93xx_keypad_config(keypad);
192 clk_enable(keypad->clk);
193 keypad->enabled = true;
194 }
195 }
196
197 return 0;
198}
199
200static DEFINE_SIMPLE_DEV_PM_OPS(ep93xx_keypad_pm_ops,
201 ep93xx_keypad_suspend, ep93xx_keypad_resume);
202
203static int ep93xx_keypad_probe(struct platform_device *pdev)
204{
205 struct device *dev = &pdev->dev;
206 struct ep93xx_keypad *keypad;
207 struct input_dev *input_dev;
208 int err;
209
210 keypad = devm_kzalloc(&pdev->dev, sizeof(*keypad), GFP_KERNEL);
211 if (!keypad)
212 return -ENOMEM;
213
214 keypad->irq = platform_get_irq(pdev, 0);
215 if (keypad->irq < 0)
216 return keypad->irq;
217
218 keypad->mmio_base = devm_platform_ioremap_resource(pdev, 0);
219 if (IS_ERR(keypad->mmio_base))
220 return PTR_ERR(keypad->mmio_base);
221
222 keypad->clk = devm_clk_get(&pdev->dev, NULL);
223 if (IS_ERR(keypad->clk))
224 return PTR_ERR(keypad->clk);
225
226 device_property_read_u32(dev, "debounce-delay-ms", &keypad->debounce);
227 device_property_read_u16(dev, "cirrus,prescale", &keypad->prescale);
228
229 input_dev = devm_input_allocate_device(&pdev->dev);
230 if (!input_dev)
231 return -ENOMEM;
232
233 keypad->input_dev = input_dev;
234
235 input_dev->name = pdev->name;
236 input_dev->id.bustype = BUS_HOST;
237 input_dev->open = ep93xx_keypad_open;
238 input_dev->close = ep93xx_keypad_close;
239
240 err = matrix_keypad_build_keymap(NULL, NULL,
241 EP93XX_MATRIX_ROWS, EP93XX_MATRIX_COLS,
242 keypad->keycodes, input_dev);
243 if (err)
244 return err;
245
246 if (device_property_read_bool(&pdev->dev, "autorepeat"))
247 __set_bit(EV_REP, input_dev->evbit);
248 input_set_drvdata(input_dev, keypad);
249
250 err = devm_request_irq(&pdev->dev, keypad->irq,
251 ep93xx_keypad_irq_handler,
252 0, pdev->name, keypad);
253 if (err)
254 return err;
255
256 err = input_register_device(input_dev);
257 if (err)
258 return err;
259
260 platform_set_drvdata(pdev, keypad);
261
262 device_init_wakeup(&pdev->dev, 1);
263 err = dev_pm_set_wake_irq(&pdev->dev, keypad->irq);
264 if (err)
265 dev_warn(&pdev->dev, "failed to set up wakeup irq: %d\n", err);
266
267 return 0;
268}
269
270static void ep93xx_keypad_remove(struct platform_device *pdev)
271{
272 dev_pm_clear_wake_irq(&pdev->dev);
273}
274
275static const struct of_device_id ep93xx_keypad_of_ids[] = {
276 { .compatible = "cirrus,ep9307-keypad" },
277 { /* sentinel */ }
278};
279MODULE_DEVICE_TABLE(of, ep93xx_keypad_of_ids);
280
281static struct platform_driver ep93xx_keypad_driver = {
282 .driver = {
283 .name = "ep93xx-keypad",
284 .pm = pm_sleep_ptr(&ep93xx_keypad_pm_ops),
285 .of_match_table = ep93xx_keypad_of_ids,
286 },
287 .probe = ep93xx_keypad_probe,
288 .remove = ep93xx_keypad_remove,
289};
290module_platform_driver(ep93xx_keypad_driver);
291
292MODULE_LICENSE("GPL");
293MODULE_AUTHOR("H Hartley Sweeten <hsweeten@visionengravers.com>");
294MODULE_DESCRIPTION("EP93xx Matrix Keypad Controller");
295MODULE_ALIAS("platform:ep93xx-keypad");