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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) ST-Ericsson SA 2010
4 *
5 * Author: Naveen Kumar G <naveen.gaddipati@stericsson.com> for ST-Ericsson
6 * Author: Sundar Iyer <sundar.iyer@stericsson.com> for ST-Ericsson
7 *
8 * Keypad controller driver for the SKE (Scroll Key Encoder) module used in
9 * the Nomadik 8815 and Ux500 platforms.
10 */
11
12#include <linux/platform_device.h>
13#include <linux/interrupt.h>
14#include <linux/spinlock.h>
15#include <linux/io.h>
16#include <linux/delay.h>
17#include <linux/input.h>
18#include <linux/slab.h>
19#include <linux/clk.h>
20#include <linux/module.h>
21
22#include <linux/platform_data/keypad-nomadik-ske.h>
23
24/* SKE_CR bits */
25#define SKE_KPMLT (0x1 << 6)
26#define SKE_KPCN (0x7 << 3)
27#define SKE_KPASEN (0x1 << 2)
28#define SKE_KPASON (0x1 << 7)
29
30/* SKE_IMSC bits */
31#define SKE_KPIMA (0x1 << 2)
32
33/* SKE_ICR bits */
34#define SKE_KPICS (0x1 << 3)
35#define SKE_KPICA (0x1 << 2)
36
37/* SKE_RIS bits */
38#define SKE_KPRISA (0x1 << 2)
39
40#define SKE_KEYPAD_ROW_SHIFT 3
41#define SKE_KPD_NUM_ROWS 8
42#define SKE_KPD_NUM_COLS 8
43
44/* keypad auto scan registers */
45#define SKE_ASR0 0x20
46#define SKE_ASR1 0x24
47#define SKE_ASR2 0x28
48#define SKE_ASR3 0x2C
49
50#define SKE_NUM_ASRX_REGISTERS (4)
51#define KEY_PRESSED_DELAY 10
52
53/**
54 * struct ske_keypad - data structure used by keypad driver
55 * @irq: irq no
56 * @reg_base: ske registers base address
57 * @input: pointer to input device object
58 * @board: keypad platform device
59 * @keymap: matrix scan code table for keycodes
60 * @clk: clock structure pointer
61 */
62struct ske_keypad {
63 int irq;
64 void __iomem *reg_base;
65 struct input_dev *input;
66 const struct ske_keypad_platform_data *board;
67 unsigned short keymap[SKE_KPD_NUM_ROWS * SKE_KPD_NUM_COLS];
68 struct clk *clk;
69 struct clk *pclk;
70 spinlock_t ske_keypad_lock;
71};
72
73static void ske_keypad_set_bits(struct ske_keypad *keypad, u16 addr,
74 u8 mask, u8 data)
75{
76 u32 ret;
77
78 spin_lock(&keypad->ske_keypad_lock);
79
80 ret = readl(keypad->reg_base + addr);
81 ret &= ~mask;
82 ret |= data;
83 writel(ret, keypad->reg_base + addr);
84
85 spin_unlock(&keypad->ske_keypad_lock);
86}
87
88/*
89 * ske_keypad_chip_init: init keypad controller configuration
90 *
91 * Enable Multi key press detection, auto scan mode
92 */
93static int __init ske_keypad_chip_init(struct ske_keypad *keypad)
94{
95 u32 value;
96 int timeout = keypad->board->debounce_ms;
97
98 /* check SKE_RIS to be 0 */
99 while ((readl(keypad->reg_base + SKE_RIS) != 0x00000000) && timeout--)
100 cpu_relax();
101
102 if (timeout == -1)
103 return -EINVAL;
104
105 /*
106 * set debounce value
107 * keypad dbounce is configured in DBCR[15:8]
108 * dbounce value in steps of 32/32.768 ms
109 */
110 spin_lock(&keypad->ske_keypad_lock);
111 value = readl(keypad->reg_base + SKE_DBCR);
112 value = value & 0xff;
113 value |= ((keypad->board->debounce_ms * 32000)/32768) << 8;
114 writel(value, keypad->reg_base + SKE_DBCR);
115 spin_unlock(&keypad->ske_keypad_lock);
116
117 /* enable multi key detection */
118 ske_keypad_set_bits(keypad, SKE_CR, 0x0, SKE_KPMLT);
119
120 /*
121 * set up the number of columns
122 * KPCN[5:3] defines no. of keypad columns to be auto scanned
123 */
124 value = (keypad->board->kcol - 1) << 3;
125 ske_keypad_set_bits(keypad, SKE_CR, SKE_KPCN, value);
126
127 /* clear keypad interrupt for auto(and pending SW) scans */
128 ske_keypad_set_bits(keypad, SKE_ICR, 0x0, SKE_KPICA | SKE_KPICS);
129
130 /* un-mask keypad interrupts */
131 ske_keypad_set_bits(keypad, SKE_IMSC, 0x0, SKE_KPIMA);
132
133 /* enable automatic scan */
134 ske_keypad_set_bits(keypad, SKE_CR, 0x0, SKE_KPASEN);
135
136 return 0;
137}
138
139static void ske_keypad_report(struct ske_keypad *keypad, u8 status, int col)
140{
141 int row = 0, code, pos;
142 struct input_dev *input = keypad->input;
143 u32 ske_ris;
144 int key_pressed;
145 int num_of_rows;
146
147 /* find out the row */
148 num_of_rows = hweight8(status);
149 do {
150 pos = __ffs(status);
151 row = pos;
152 status &= ~(1 << pos);
153
154 code = MATRIX_SCAN_CODE(row, col, SKE_KEYPAD_ROW_SHIFT);
155 ske_ris = readl(keypad->reg_base + SKE_RIS);
156 key_pressed = ske_ris & SKE_KPRISA;
157
158 input_event(input, EV_MSC, MSC_SCAN, code);
159 input_report_key(input, keypad->keymap[code], key_pressed);
160 input_sync(input);
161 num_of_rows--;
162 } while (num_of_rows);
163}
164
165static void ske_keypad_read_data(struct ske_keypad *keypad)
166{
167 u8 status;
168 int col = 0;
169 int ske_asr, i;
170
171 /*
172 * Read the auto scan registers
173 *
174 * Each SKE_ASRx (x=0 to x=3) contains two row values.
175 * lower byte contains row value for column 2*x,
176 * upper byte contains row value for column 2*x + 1
177 */
178 for (i = 0; i < SKE_NUM_ASRX_REGISTERS; i++) {
179 ske_asr = readl(keypad->reg_base + SKE_ASR0 + (4 * i));
180 if (!ske_asr)
181 continue;
182
183 /* now that ASRx is zero, find out the coloumn x and row y */
184 status = ske_asr & 0xff;
185 if (status) {
186 col = i * 2;
187 ske_keypad_report(keypad, status, col);
188 }
189 status = (ske_asr & 0xff00) >> 8;
190 if (status) {
191 col = (i * 2) + 1;
192 ske_keypad_report(keypad, status, col);
193 }
194 }
195}
196
197static irqreturn_t ske_keypad_irq(int irq, void *dev_id)
198{
199 struct ske_keypad *keypad = dev_id;
200 int timeout = keypad->board->debounce_ms;
201
202 /* disable auto scan interrupt; mask the interrupt generated */
203 ske_keypad_set_bits(keypad, SKE_IMSC, ~SKE_KPIMA, 0x0);
204 ske_keypad_set_bits(keypad, SKE_ICR, 0x0, SKE_KPICA);
205
206 while ((readl(keypad->reg_base + SKE_CR) & SKE_KPASON) && --timeout)
207 cpu_relax();
208
209 /* SKEx registers are stable and can be read */
210 ske_keypad_read_data(keypad);
211
212 /* wait until raw interrupt is clear */
213 while ((readl(keypad->reg_base + SKE_RIS)) && --timeout)
214 msleep(KEY_PRESSED_DELAY);
215
216 /* enable auto scan interrupts */
217 ske_keypad_set_bits(keypad, SKE_IMSC, 0x0, SKE_KPIMA);
218
219 return IRQ_HANDLED;
220}
221
222static int __init ske_keypad_probe(struct platform_device *pdev)
223{
224 const struct ske_keypad_platform_data *plat =
225 dev_get_platdata(&pdev->dev);
226 struct ske_keypad *keypad;
227 struct input_dev *input;
228 struct resource *res;
229 int irq;
230 int error;
231
232 if (!plat) {
233 dev_err(&pdev->dev, "invalid keypad platform data\n");
234 return -EINVAL;
235 }
236
237 irq = platform_get_irq(pdev, 0);
238 if (irq < 0)
239 return -EINVAL;
240
241 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
242 if (!res) {
243 dev_err(&pdev->dev, "missing platform resources\n");
244 return -EINVAL;
245 }
246
247 keypad = kzalloc(sizeof(struct ske_keypad), GFP_KERNEL);
248 input = input_allocate_device();
249 if (!keypad || !input) {
250 dev_err(&pdev->dev, "failed to allocate keypad memory\n");
251 error = -ENOMEM;
252 goto err_free_mem;
253 }
254
255 keypad->irq = irq;
256 keypad->board = plat;
257 keypad->input = input;
258 spin_lock_init(&keypad->ske_keypad_lock);
259
260 if (!request_mem_region(res->start, resource_size(res), pdev->name)) {
261 dev_err(&pdev->dev, "failed to request I/O memory\n");
262 error = -EBUSY;
263 goto err_free_mem;
264 }
265
266 keypad->reg_base = ioremap(res->start, resource_size(res));
267 if (!keypad->reg_base) {
268 dev_err(&pdev->dev, "failed to remap I/O memory\n");
269 error = -ENXIO;
270 goto err_free_mem_region;
271 }
272
273 keypad->pclk = clk_get(&pdev->dev, "apb_pclk");
274 if (IS_ERR(keypad->pclk)) {
275 dev_err(&pdev->dev, "failed to get pclk\n");
276 error = PTR_ERR(keypad->pclk);
277 goto err_iounmap;
278 }
279
280 keypad->clk = clk_get(&pdev->dev, NULL);
281 if (IS_ERR(keypad->clk)) {
282 dev_err(&pdev->dev, "failed to get clk\n");
283 error = PTR_ERR(keypad->clk);
284 goto err_pclk;
285 }
286
287 input->id.bustype = BUS_HOST;
288 input->name = "ux500-ske-keypad";
289 input->dev.parent = &pdev->dev;
290
291 error = matrix_keypad_build_keymap(plat->keymap_data, NULL,
292 SKE_KPD_NUM_ROWS, SKE_KPD_NUM_COLS,
293 keypad->keymap, input);
294 if (error) {
295 dev_err(&pdev->dev, "Failed to build keymap\n");
296 goto err_clk;
297 }
298
299 input_set_capability(input, EV_MSC, MSC_SCAN);
300 if (!plat->no_autorepeat)
301 __set_bit(EV_REP, input->evbit);
302
303 error = clk_prepare_enable(keypad->pclk);
304 if (error) {
305 dev_err(&pdev->dev, "Failed to prepare/enable pclk\n");
306 goto err_clk;
307 }
308
309 error = clk_prepare_enable(keypad->clk);
310 if (error) {
311 dev_err(&pdev->dev, "Failed to prepare/enable clk\n");
312 goto err_pclk_disable;
313 }
314
315
316 /* go through board initialization helpers */
317 if (keypad->board->init)
318 keypad->board->init();
319
320 error = ske_keypad_chip_init(keypad);
321 if (error) {
322 dev_err(&pdev->dev, "unable to init keypad hardware\n");
323 goto err_clk_disable;
324 }
325
326 error = request_threaded_irq(keypad->irq, NULL, ske_keypad_irq,
327 IRQF_ONESHOT, "ske-keypad", keypad);
328 if (error) {
329 dev_err(&pdev->dev, "allocate irq %d failed\n", keypad->irq);
330 goto err_clk_disable;
331 }
332
333 error = input_register_device(input);
334 if (error) {
335 dev_err(&pdev->dev,
336 "unable to register input device: %d\n", error);
337 goto err_free_irq;
338 }
339
340 if (plat->wakeup_enable)
341 device_init_wakeup(&pdev->dev, true);
342
343 platform_set_drvdata(pdev, keypad);
344
345 return 0;
346
347err_free_irq:
348 free_irq(keypad->irq, keypad);
349err_clk_disable:
350 clk_disable_unprepare(keypad->clk);
351err_pclk_disable:
352 clk_disable_unprepare(keypad->pclk);
353err_clk:
354 clk_put(keypad->clk);
355err_pclk:
356 clk_put(keypad->pclk);
357err_iounmap:
358 iounmap(keypad->reg_base);
359err_free_mem_region:
360 release_mem_region(res->start, resource_size(res));
361err_free_mem:
362 input_free_device(input);
363 kfree(keypad);
364 return error;
365}
366
367static int ske_keypad_remove(struct platform_device *pdev)
368{
369 struct ske_keypad *keypad = platform_get_drvdata(pdev);
370 struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
371
372 free_irq(keypad->irq, keypad);
373
374 input_unregister_device(keypad->input);
375
376 clk_disable_unprepare(keypad->clk);
377 clk_put(keypad->clk);
378
379 if (keypad->board->exit)
380 keypad->board->exit();
381
382 iounmap(keypad->reg_base);
383 release_mem_region(res->start, resource_size(res));
384 kfree(keypad);
385
386 return 0;
387}
388
389#ifdef CONFIG_PM_SLEEP
390static int ske_keypad_suspend(struct device *dev)
391{
392 struct platform_device *pdev = to_platform_device(dev);
393 struct ske_keypad *keypad = platform_get_drvdata(pdev);
394 int irq = platform_get_irq(pdev, 0);
395
396 if (device_may_wakeup(dev))
397 enable_irq_wake(irq);
398 else
399 ske_keypad_set_bits(keypad, SKE_IMSC, ~SKE_KPIMA, 0x0);
400
401 return 0;
402}
403
404static int ske_keypad_resume(struct device *dev)
405{
406 struct platform_device *pdev = to_platform_device(dev);
407 struct ske_keypad *keypad = platform_get_drvdata(pdev);
408 int irq = platform_get_irq(pdev, 0);
409
410 if (device_may_wakeup(dev))
411 disable_irq_wake(irq);
412 else
413 ske_keypad_set_bits(keypad, SKE_IMSC, 0x0, SKE_KPIMA);
414
415 return 0;
416}
417#endif
418
419static SIMPLE_DEV_PM_OPS(ske_keypad_dev_pm_ops,
420 ske_keypad_suspend, ske_keypad_resume);
421
422static struct platform_driver ske_keypad_driver = {
423 .driver = {
424 .name = "nmk-ske-keypad",
425 .pm = &ske_keypad_dev_pm_ops,
426 },
427 .remove = ske_keypad_remove,
428};
429
430module_platform_driver_probe(ske_keypad_driver, ske_keypad_probe);
431
432MODULE_LICENSE("GPL v2");
433MODULE_AUTHOR("Naveen Kumar <naveen.gaddipati@stericsson.com> / Sundar Iyer <sundar.iyer@stericsson.com>");
434MODULE_DESCRIPTION("Nomadik Scroll-Key-Encoder Keypad Driver");
435MODULE_ALIAS("platform:nomadik-ske-keypad");
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) ST-Ericsson SA 2010
4 *
5 * Author: Naveen Kumar G <naveen.gaddipati@stericsson.com> for ST-Ericsson
6 * Author: Sundar Iyer <sundar.iyer@stericsson.com> for ST-Ericsson
7 *
8 * Keypad controller driver for the SKE (Scroll Key Encoder) module used in
9 * the Nomadik 8815 and Ux500 platforms.
10 */
11
12#include <linux/platform_device.h>
13#include <linux/interrupt.h>
14#include <linux/spinlock.h>
15#include <linux/io.h>
16#include <linux/delay.h>
17#include <linux/input.h>
18#include <linux/slab.h>
19#include <linux/clk.h>
20#include <linux/module.h>
21
22#include <linux/platform_data/keypad-nomadik-ske.h>
23
24/* SKE_CR bits */
25#define SKE_KPMLT (0x1 << 6)
26#define SKE_KPCN (0x7 << 3)
27#define SKE_KPASEN (0x1 << 2)
28#define SKE_KPASON (0x1 << 7)
29
30/* SKE_IMSC bits */
31#define SKE_KPIMA (0x1 << 2)
32
33/* SKE_ICR bits */
34#define SKE_KPICS (0x1 << 3)
35#define SKE_KPICA (0x1 << 2)
36
37/* SKE_RIS bits */
38#define SKE_KPRISA (0x1 << 2)
39
40#define SKE_KEYPAD_ROW_SHIFT 3
41#define SKE_KPD_NUM_ROWS 8
42#define SKE_KPD_NUM_COLS 8
43
44/* keypad auto scan registers */
45#define SKE_ASR0 0x20
46#define SKE_ASR1 0x24
47#define SKE_ASR2 0x28
48#define SKE_ASR3 0x2C
49
50#define SKE_NUM_ASRX_REGISTERS (4)
51#define KEY_PRESSED_DELAY 10
52
53/**
54 * struct ske_keypad - data structure used by keypad driver
55 * @irq: irq no
56 * @reg_base: ske registers base address
57 * @input: pointer to input device object
58 * @board: keypad platform device
59 * @keymap: matrix scan code table for keycodes
60 * @clk: clock structure pointer
61 * @pclk: clock structure pointer
62 * @ske_keypad_lock: spinlock protecting the keypad read/writes
63 */
64struct ske_keypad {
65 int irq;
66 void __iomem *reg_base;
67 struct input_dev *input;
68 const struct ske_keypad_platform_data *board;
69 unsigned short keymap[SKE_KPD_NUM_ROWS * SKE_KPD_NUM_COLS];
70 struct clk *clk;
71 struct clk *pclk;
72 spinlock_t ske_keypad_lock;
73};
74
75static void ske_keypad_set_bits(struct ske_keypad *keypad, u16 addr,
76 u8 mask, u8 data)
77{
78 u32 ret;
79
80 spin_lock(&keypad->ske_keypad_lock);
81
82 ret = readl(keypad->reg_base + addr);
83 ret &= ~mask;
84 ret |= data;
85 writel(ret, keypad->reg_base + addr);
86
87 spin_unlock(&keypad->ske_keypad_lock);
88}
89
90/*
91 * ske_keypad_chip_init: init keypad controller configuration
92 *
93 * Enable Multi key press detection, auto scan mode
94 */
95static int __init ske_keypad_chip_init(struct ske_keypad *keypad)
96{
97 u32 value;
98 int timeout = keypad->board->debounce_ms;
99
100 /* check SKE_RIS to be 0 */
101 while ((readl(keypad->reg_base + SKE_RIS) != 0x00000000) && timeout--)
102 cpu_relax();
103
104 if (timeout == -1)
105 return -EINVAL;
106
107 /*
108 * set debounce value
109 * keypad dbounce is configured in DBCR[15:8]
110 * dbounce value in steps of 32/32.768 ms
111 */
112 spin_lock(&keypad->ske_keypad_lock);
113 value = readl(keypad->reg_base + SKE_DBCR);
114 value = value & 0xff;
115 value |= ((keypad->board->debounce_ms * 32000)/32768) << 8;
116 writel(value, keypad->reg_base + SKE_DBCR);
117 spin_unlock(&keypad->ske_keypad_lock);
118
119 /* enable multi key detection */
120 ske_keypad_set_bits(keypad, SKE_CR, 0x0, SKE_KPMLT);
121
122 /*
123 * set up the number of columns
124 * KPCN[5:3] defines no. of keypad columns to be auto scanned
125 */
126 value = (keypad->board->kcol - 1) << 3;
127 ske_keypad_set_bits(keypad, SKE_CR, SKE_KPCN, value);
128
129 /* clear keypad interrupt for auto(and pending SW) scans */
130 ske_keypad_set_bits(keypad, SKE_ICR, 0x0, SKE_KPICA | SKE_KPICS);
131
132 /* un-mask keypad interrupts */
133 ske_keypad_set_bits(keypad, SKE_IMSC, 0x0, SKE_KPIMA);
134
135 /* enable automatic scan */
136 ske_keypad_set_bits(keypad, SKE_CR, 0x0, SKE_KPASEN);
137
138 return 0;
139}
140
141static void ske_keypad_report(struct ske_keypad *keypad, u8 status, int col)
142{
143 int row = 0, code, pos;
144 struct input_dev *input = keypad->input;
145 u32 ske_ris;
146 int key_pressed;
147 int num_of_rows;
148
149 /* find out the row */
150 num_of_rows = hweight8(status);
151 do {
152 pos = __ffs(status);
153 row = pos;
154 status &= ~(1 << pos);
155
156 code = MATRIX_SCAN_CODE(row, col, SKE_KEYPAD_ROW_SHIFT);
157 ske_ris = readl(keypad->reg_base + SKE_RIS);
158 key_pressed = ske_ris & SKE_KPRISA;
159
160 input_event(input, EV_MSC, MSC_SCAN, code);
161 input_report_key(input, keypad->keymap[code], key_pressed);
162 input_sync(input);
163 num_of_rows--;
164 } while (num_of_rows);
165}
166
167static void ske_keypad_read_data(struct ske_keypad *keypad)
168{
169 u8 status;
170 int col = 0;
171 int ske_asr, i;
172
173 /*
174 * Read the auto scan registers
175 *
176 * Each SKE_ASRx (x=0 to x=3) contains two row values.
177 * lower byte contains row value for column 2*x,
178 * upper byte contains row value for column 2*x + 1
179 */
180 for (i = 0; i < SKE_NUM_ASRX_REGISTERS; i++) {
181 ske_asr = readl(keypad->reg_base + SKE_ASR0 + (4 * i));
182 if (!ske_asr)
183 continue;
184
185 /* now that ASRx is zero, find out the coloumn x and row y */
186 status = ske_asr & 0xff;
187 if (status) {
188 col = i * 2;
189 ske_keypad_report(keypad, status, col);
190 }
191 status = (ske_asr & 0xff00) >> 8;
192 if (status) {
193 col = (i * 2) + 1;
194 ske_keypad_report(keypad, status, col);
195 }
196 }
197}
198
199static irqreturn_t ske_keypad_irq(int irq, void *dev_id)
200{
201 struct ske_keypad *keypad = dev_id;
202 int timeout = keypad->board->debounce_ms;
203
204 /* disable auto scan interrupt; mask the interrupt generated */
205 ske_keypad_set_bits(keypad, SKE_IMSC, ~SKE_KPIMA, 0x0);
206 ske_keypad_set_bits(keypad, SKE_ICR, 0x0, SKE_KPICA);
207
208 while ((readl(keypad->reg_base + SKE_CR) & SKE_KPASON) && --timeout)
209 cpu_relax();
210
211 /* SKEx registers are stable and can be read */
212 ske_keypad_read_data(keypad);
213
214 /* wait until raw interrupt is clear */
215 while ((readl(keypad->reg_base + SKE_RIS)) && --timeout)
216 msleep(KEY_PRESSED_DELAY);
217
218 /* enable auto scan interrupts */
219 ske_keypad_set_bits(keypad, SKE_IMSC, 0x0, SKE_KPIMA);
220
221 return IRQ_HANDLED;
222}
223
224static void ske_keypad_board_exit(void *data)
225{
226 struct ske_keypad *keypad = data;
227
228 keypad->board->exit();
229}
230
231static int __init ske_keypad_probe(struct platform_device *pdev)
232{
233 const struct ske_keypad_platform_data *plat =
234 dev_get_platdata(&pdev->dev);
235 struct device *dev = &pdev->dev;
236 struct ske_keypad *keypad;
237 struct input_dev *input;
238 int irq;
239 int error;
240
241 if (!plat) {
242 dev_err(&pdev->dev, "invalid keypad platform data\n");
243 return -EINVAL;
244 }
245
246 irq = platform_get_irq(pdev, 0);
247 if (irq < 0)
248 return irq;
249
250 keypad = devm_kzalloc(dev, sizeof(struct ske_keypad),
251 GFP_KERNEL);
252 input = devm_input_allocate_device(dev);
253 if (!keypad || !input) {
254 dev_err(&pdev->dev, "failed to allocate keypad memory\n");
255 return -ENOMEM;
256 }
257
258 keypad->irq = irq;
259 keypad->board = plat;
260 keypad->input = input;
261 spin_lock_init(&keypad->ske_keypad_lock);
262
263 keypad->reg_base = devm_platform_ioremap_resource(pdev, 0);
264 if (IS_ERR(keypad->reg_base))
265 return PTR_ERR(keypad->reg_base);
266
267 keypad->pclk = devm_clk_get_enabled(dev, "apb_pclk");
268 if (IS_ERR(keypad->pclk)) {
269 dev_err(&pdev->dev, "failed to get pclk\n");
270 return PTR_ERR(keypad->pclk);
271 }
272
273 keypad->clk = devm_clk_get_enabled(dev, NULL);
274 if (IS_ERR(keypad->clk)) {
275 dev_err(&pdev->dev, "failed to get clk\n");
276 return PTR_ERR(keypad->clk);
277 }
278
279 input->id.bustype = BUS_HOST;
280 input->name = "ux500-ske-keypad";
281 input->dev.parent = &pdev->dev;
282
283 error = matrix_keypad_build_keymap(plat->keymap_data, NULL,
284 SKE_KPD_NUM_ROWS, SKE_KPD_NUM_COLS,
285 keypad->keymap, input);
286 if (error) {
287 dev_err(&pdev->dev, "Failed to build keymap\n");
288 return error;
289 }
290
291 input_set_capability(input, EV_MSC, MSC_SCAN);
292 if (!plat->no_autorepeat)
293 __set_bit(EV_REP, input->evbit);
294
295 /* go through board initialization helpers */
296 if (keypad->board->init)
297 keypad->board->init();
298
299 if (keypad->board->exit) {
300 error = devm_add_action_or_reset(dev, ske_keypad_board_exit,
301 keypad);
302 if (error)
303 return error;
304 }
305
306 error = ske_keypad_chip_init(keypad);
307 if (error) {
308 dev_err(&pdev->dev, "unable to init keypad hardware\n");
309 return error;
310 }
311
312 error = devm_request_threaded_irq(dev, keypad->irq,
313 NULL, ske_keypad_irq,
314 IRQF_ONESHOT, "ske-keypad", keypad);
315 if (error) {
316 dev_err(&pdev->dev, "allocate irq %d failed\n", keypad->irq);
317 return error;
318 }
319
320 error = input_register_device(input);
321 if (error) {
322 dev_err(&pdev->dev,
323 "unable to register input device: %d\n", error);
324 return error;
325 }
326
327 if (plat->wakeup_enable)
328 device_init_wakeup(&pdev->dev, true);
329
330 platform_set_drvdata(pdev, keypad);
331
332 return 0;
333}
334
335static int ske_keypad_suspend(struct device *dev)
336{
337 struct platform_device *pdev = to_platform_device(dev);
338 struct ske_keypad *keypad = platform_get_drvdata(pdev);
339 int irq = platform_get_irq(pdev, 0);
340
341 if (device_may_wakeup(dev))
342 enable_irq_wake(irq);
343 else
344 ske_keypad_set_bits(keypad, SKE_IMSC, ~SKE_KPIMA, 0x0);
345
346 return 0;
347}
348
349static int ske_keypad_resume(struct device *dev)
350{
351 struct platform_device *pdev = to_platform_device(dev);
352 struct ske_keypad *keypad = platform_get_drvdata(pdev);
353 int irq = platform_get_irq(pdev, 0);
354
355 if (device_may_wakeup(dev))
356 disable_irq_wake(irq);
357 else
358 ske_keypad_set_bits(keypad, SKE_IMSC, 0x0, SKE_KPIMA);
359
360 return 0;
361}
362
363static DEFINE_SIMPLE_DEV_PM_OPS(ske_keypad_dev_pm_ops,
364 ske_keypad_suspend, ske_keypad_resume);
365
366static struct platform_driver ske_keypad_driver = {
367 .driver = {
368 .name = "nmk-ske-keypad",
369 .pm = pm_sleep_ptr(&ske_keypad_dev_pm_ops),
370 },
371};
372
373module_platform_driver_probe(ske_keypad_driver, ske_keypad_probe);
374
375MODULE_LICENSE("GPL v2");
376MODULE_AUTHOR("Naveen Kumar <naveen.gaddipati@stericsson.com> / Sundar Iyer <sundar.iyer@stericsson.com>");
377MODULE_DESCRIPTION("Nomadik Scroll-Key-Encoder Keypad Driver");
378MODULE_ALIAS("platform:nomadik-ske-keypad");