Loading...
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * MPC52xx gpio driver
4 *
5 * Copyright (c) 2008 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
6 */
7
8#include <linux/of.h>
9#include <linux/kernel.h>
10#include <linux/slab.h>
11#include <linux/gpio/legacy-of-mm-gpiochip.h>
12#include <linux/io.h>
13#include <linux/platform_device.h>
14#include <linux/module.h>
15
16#include <asm/mpc52xx.h>
17#include <sysdev/fsl_soc.h>
18
19static DEFINE_SPINLOCK(gpio_lock);
20
21struct mpc52xx_gpiochip {
22 struct of_mm_gpio_chip mmchip;
23 unsigned int shadow_dvo;
24 unsigned int shadow_gpioe;
25 unsigned int shadow_ddr;
26};
27
28/*
29 * GPIO LIB API implementation for wakeup GPIOs.
30 *
31 * There's a maximum of 8 wakeup GPIOs. Which of these are available
32 * for use depends on your board setup.
33 *
34 * 0 -> GPIO_WKUP_7
35 * 1 -> GPIO_WKUP_6
36 * 2 -> PSC6_1
37 * 3 -> PSC6_0
38 * 4 -> ETH_17
39 * 5 -> PSC3_9
40 * 6 -> PSC2_4
41 * 7 -> PSC1_4
42 *
43 */
44static int mpc52xx_wkup_gpio_get(struct gpio_chip *gc, unsigned int gpio)
45{
46 struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
47 struct mpc52xx_gpio_wkup __iomem *regs = mm_gc->regs;
48 unsigned int ret;
49
50 ret = (in_8(®s->wkup_ival) >> (7 - gpio)) & 1;
51
52 pr_debug("%s: gpio: %d ret: %d\n", __func__, gpio, ret);
53
54 return ret;
55}
56
57static inline void
58__mpc52xx_wkup_gpio_set(struct gpio_chip *gc, unsigned int gpio, int val)
59{
60 struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
61 struct mpc52xx_gpiochip *chip = gpiochip_get_data(gc);
62 struct mpc52xx_gpio_wkup __iomem *regs = mm_gc->regs;
63
64 if (val)
65 chip->shadow_dvo |= 1 << (7 - gpio);
66 else
67 chip->shadow_dvo &= ~(1 << (7 - gpio));
68
69 out_8(®s->wkup_dvo, chip->shadow_dvo);
70}
71
72static void
73mpc52xx_wkup_gpio_set(struct gpio_chip *gc, unsigned int gpio, int val)
74{
75 unsigned long flags;
76
77 spin_lock_irqsave(&gpio_lock, flags);
78
79 __mpc52xx_wkup_gpio_set(gc, gpio, val);
80
81 spin_unlock_irqrestore(&gpio_lock, flags);
82
83 pr_debug("%s: gpio: %d val: %d\n", __func__, gpio, val);
84}
85
86static int mpc52xx_wkup_gpio_dir_in(struct gpio_chip *gc, unsigned int gpio)
87{
88 struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
89 struct mpc52xx_gpiochip *chip = gpiochip_get_data(gc);
90 struct mpc52xx_gpio_wkup __iomem *regs = mm_gc->regs;
91 unsigned long flags;
92
93 spin_lock_irqsave(&gpio_lock, flags);
94
95 /* set the direction */
96 chip->shadow_ddr &= ~(1 << (7 - gpio));
97 out_8(®s->wkup_ddr, chip->shadow_ddr);
98
99 /* and enable the pin */
100 chip->shadow_gpioe |= 1 << (7 - gpio);
101 out_8(®s->wkup_gpioe, chip->shadow_gpioe);
102
103 spin_unlock_irqrestore(&gpio_lock, flags);
104
105 return 0;
106}
107
108static int
109mpc52xx_wkup_gpio_dir_out(struct gpio_chip *gc, unsigned int gpio, int val)
110{
111 struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
112 struct mpc52xx_gpio_wkup __iomem *regs = mm_gc->regs;
113 struct mpc52xx_gpiochip *chip = gpiochip_get_data(gc);
114 unsigned long flags;
115
116 spin_lock_irqsave(&gpio_lock, flags);
117
118 __mpc52xx_wkup_gpio_set(gc, gpio, val);
119
120 /* Then set direction */
121 chip->shadow_ddr |= 1 << (7 - gpio);
122 out_8(®s->wkup_ddr, chip->shadow_ddr);
123
124 /* Finally enable the pin */
125 chip->shadow_gpioe |= 1 << (7 - gpio);
126 out_8(®s->wkup_gpioe, chip->shadow_gpioe);
127
128 spin_unlock_irqrestore(&gpio_lock, flags);
129
130 pr_debug("%s: gpio: %d val: %d\n", __func__, gpio, val);
131
132 return 0;
133}
134
135static int mpc52xx_wkup_gpiochip_probe(struct platform_device *ofdev)
136{
137 struct mpc52xx_gpiochip *chip;
138 struct mpc52xx_gpio_wkup __iomem *regs;
139 struct gpio_chip *gc;
140 int ret;
141
142 chip = devm_kzalloc(&ofdev->dev, sizeof(*chip), GFP_KERNEL);
143 if (!chip)
144 return -ENOMEM;
145
146 platform_set_drvdata(ofdev, chip);
147
148 gc = &chip->mmchip.gc;
149
150 gc->ngpio = 8;
151 gc->direction_input = mpc52xx_wkup_gpio_dir_in;
152 gc->direction_output = mpc52xx_wkup_gpio_dir_out;
153 gc->get = mpc52xx_wkup_gpio_get;
154 gc->set = mpc52xx_wkup_gpio_set;
155
156 ret = of_mm_gpiochip_add_data(ofdev->dev.of_node, &chip->mmchip, chip);
157 if (ret)
158 return ret;
159
160 regs = chip->mmchip.regs;
161 chip->shadow_gpioe = in_8(®s->wkup_gpioe);
162 chip->shadow_ddr = in_8(®s->wkup_ddr);
163 chip->shadow_dvo = in_8(®s->wkup_dvo);
164
165 return 0;
166}
167
168static void mpc52xx_gpiochip_remove(struct platform_device *ofdev)
169{
170 struct mpc52xx_gpiochip *chip = platform_get_drvdata(ofdev);
171
172 of_mm_gpiochip_remove(&chip->mmchip);
173}
174
175static const struct of_device_id mpc52xx_wkup_gpiochip_match[] = {
176 { .compatible = "fsl,mpc5200-gpio-wkup", },
177 {}
178};
179
180static struct platform_driver mpc52xx_wkup_gpiochip_driver = {
181 .driver = {
182 .name = "mpc5200-gpio-wkup",
183 .of_match_table = mpc52xx_wkup_gpiochip_match,
184 },
185 .probe = mpc52xx_wkup_gpiochip_probe,
186 .remove_new = mpc52xx_gpiochip_remove,
187};
188
189/*
190 * GPIO LIB API implementation for simple GPIOs
191 *
192 * There's a maximum of 32 simple GPIOs. Which of these are available
193 * for use depends on your board setup.
194 * The numbering reflects the bit numbering in the port registers:
195 *
196 * 0..1 > reserved
197 * 2..3 > IRDA
198 * 4..7 > ETHR
199 * 8..11 > reserved
200 * 12..15 > USB
201 * 16..17 > reserved
202 * 18..23 > PSC3
203 * 24..27 > PSC2
204 * 28..31 > PSC1
205 */
206static int mpc52xx_simple_gpio_get(struct gpio_chip *gc, unsigned int gpio)
207{
208 struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
209 struct mpc52xx_gpio __iomem *regs = mm_gc->regs;
210 unsigned int ret;
211
212 ret = (in_be32(®s->simple_ival) >> (31 - gpio)) & 1;
213
214 return ret;
215}
216
217static inline void
218__mpc52xx_simple_gpio_set(struct gpio_chip *gc, unsigned int gpio, int val)
219{
220 struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
221 struct mpc52xx_gpiochip *chip = gpiochip_get_data(gc);
222 struct mpc52xx_gpio __iomem *regs = mm_gc->regs;
223
224 if (val)
225 chip->shadow_dvo |= 1 << (31 - gpio);
226 else
227 chip->shadow_dvo &= ~(1 << (31 - gpio));
228 out_be32(®s->simple_dvo, chip->shadow_dvo);
229}
230
231static void
232mpc52xx_simple_gpio_set(struct gpio_chip *gc, unsigned int gpio, int val)
233{
234 unsigned long flags;
235
236 spin_lock_irqsave(&gpio_lock, flags);
237
238 __mpc52xx_simple_gpio_set(gc, gpio, val);
239
240 spin_unlock_irqrestore(&gpio_lock, flags);
241
242 pr_debug("%s: gpio: %d val: %d\n", __func__, gpio, val);
243}
244
245static int mpc52xx_simple_gpio_dir_in(struct gpio_chip *gc, unsigned int gpio)
246{
247 struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
248 struct mpc52xx_gpiochip *chip = gpiochip_get_data(gc);
249 struct mpc52xx_gpio __iomem *regs = mm_gc->regs;
250 unsigned long flags;
251
252 spin_lock_irqsave(&gpio_lock, flags);
253
254 /* set the direction */
255 chip->shadow_ddr &= ~(1 << (31 - gpio));
256 out_be32(®s->simple_ddr, chip->shadow_ddr);
257
258 /* and enable the pin */
259 chip->shadow_gpioe |= 1 << (31 - gpio);
260 out_be32(®s->simple_gpioe, chip->shadow_gpioe);
261
262 spin_unlock_irqrestore(&gpio_lock, flags);
263
264 return 0;
265}
266
267static int
268mpc52xx_simple_gpio_dir_out(struct gpio_chip *gc, unsigned int gpio, int val)
269{
270 struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
271 struct mpc52xx_gpiochip *chip = gpiochip_get_data(gc);
272 struct mpc52xx_gpio __iomem *regs = mm_gc->regs;
273 unsigned long flags;
274
275 spin_lock_irqsave(&gpio_lock, flags);
276
277 /* First set initial value */
278 __mpc52xx_simple_gpio_set(gc, gpio, val);
279
280 /* Then set direction */
281 chip->shadow_ddr |= 1 << (31 - gpio);
282 out_be32(®s->simple_ddr, chip->shadow_ddr);
283
284 /* Finally enable the pin */
285 chip->shadow_gpioe |= 1 << (31 - gpio);
286 out_be32(®s->simple_gpioe, chip->shadow_gpioe);
287
288 spin_unlock_irqrestore(&gpio_lock, flags);
289
290 pr_debug("%s: gpio: %d val: %d\n", __func__, gpio, val);
291
292 return 0;
293}
294
295static int mpc52xx_simple_gpiochip_probe(struct platform_device *ofdev)
296{
297 struct mpc52xx_gpiochip *chip;
298 struct gpio_chip *gc;
299 struct mpc52xx_gpio __iomem *regs;
300 int ret;
301
302 chip = devm_kzalloc(&ofdev->dev, sizeof(*chip), GFP_KERNEL);
303 if (!chip)
304 return -ENOMEM;
305
306 platform_set_drvdata(ofdev, chip);
307
308 gc = &chip->mmchip.gc;
309
310 gc->ngpio = 32;
311 gc->direction_input = mpc52xx_simple_gpio_dir_in;
312 gc->direction_output = mpc52xx_simple_gpio_dir_out;
313 gc->get = mpc52xx_simple_gpio_get;
314 gc->set = mpc52xx_simple_gpio_set;
315
316 ret = of_mm_gpiochip_add_data(ofdev->dev.of_node, &chip->mmchip, chip);
317 if (ret)
318 return ret;
319
320 regs = chip->mmchip.regs;
321 chip->shadow_gpioe = in_be32(®s->simple_gpioe);
322 chip->shadow_ddr = in_be32(®s->simple_ddr);
323 chip->shadow_dvo = in_be32(®s->simple_dvo);
324
325 return 0;
326}
327
328static const struct of_device_id mpc52xx_simple_gpiochip_match[] = {
329 { .compatible = "fsl,mpc5200-gpio", },
330 {}
331};
332
333static struct platform_driver mpc52xx_simple_gpiochip_driver = {
334 .driver = {
335 .name = "mpc5200-gpio",
336 .of_match_table = mpc52xx_simple_gpiochip_match,
337 },
338 .probe = mpc52xx_simple_gpiochip_probe,
339 .remove_new = mpc52xx_gpiochip_remove,
340};
341
342static struct platform_driver * const drivers[] = {
343 &mpc52xx_wkup_gpiochip_driver,
344 &mpc52xx_simple_gpiochip_driver,
345};
346
347static int __init mpc52xx_gpio_init(void)
348{
349 return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
350}
351
352/* Make sure we get initialised before anyone else tries to use us */
353subsys_initcall(mpc52xx_gpio_init);
354
355static void __exit mpc52xx_gpio_exit(void)
356{
357 platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
358}
359module_exit(mpc52xx_gpio_exit);
360
361MODULE_DESCRIPTION("Freescale MPC52xx gpio driver");
362MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de");
363MODULE_LICENSE("GPL v2");
364
1/*
2 * MPC52xx gpio driver
3 *
4 * Copyright (c) 2008 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2
8 * as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 */
19
20#include <linux/of.h>
21#include <linux/kernel.h>
22#include <linux/slab.h>
23#include <linux/of_gpio.h>
24#include <linux/io.h>
25#include <linux/of_platform.h>
26#include <linux/module.h>
27
28#include <asm/gpio.h>
29#include <asm/mpc52xx.h>
30#include <sysdev/fsl_soc.h>
31
32static DEFINE_SPINLOCK(gpio_lock);
33
34struct mpc52xx_gpiochip {
35 struct of_mm_gpio_chip mmchip;
36 unsigned int shadow_dvo;
37 unsigned int shadow_gpioe;
38 unsigned int shadow_ddr;
39};
40
41/*
42 * GPIO LIB API implementation for wakeup GPIOs.
43 *
44 * There's a maximum of 8 wakeup GPIOs. Which of these are available
45 * for use depends on your board setup.
46 *
47 * 0 -> GPIO_WKUP_7
48 * 1 -> GPIO_WKUP_6
49 * 2 -> PSC6_1
50 * 3 -> PSC6_0
51 * 4 -> ETH_17
52 * 5 -> PSC3_9
53 * 6 -> PSC2_4
54 * 7 -> PSC1_4
55 *
56 */
57static int mpc52xx_wkup_gpio_get(struct gpio_chip *gc, unsigned int gpio)
58{
59 struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
60 struct mpc52xx_gpio_wkup __iomem *regs = mm_gc->regs;
61 unsigned int ret;
62
63 ret = (in_8(®s->wkup_ival) >> (7 - gpio)) & 1;
64
65 pr_debug("%s: gpio: %d ret: %d\n", __func__, gpio, ret);
66
67 return ret;
68}
69
70static inline void
71__mpc52xx_wkup_gpio_set(struct gpio_chip *gc, unsigned int gpio, int val)
72{
73 struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
74 struct mpc52xx_gpiochip *chip = container_of(mm_gc,
75 struct mpc52xx_gpiochip, mmchip);
76 struct mpc52xx_gpio_wkup __iomem *regs = mm_gc->regs;
77
78 if (val)
79 chip->shadow_dvo |= 1 << (7 - gpio);
80 else
81 chip->shadow_dvo &= ~(1 << (7 - gpio));
82
83 out_8(®s->wkup_dvo, chip->shadow_dvo);
84}
85
86static void
87mpc52xx_wkup_gpio_set(struct gpio_chip *gc, unsigned int gpio, int val)
88{
89 unsigned long flags;
90
91 spin_lock_irqsave(&gpio_lock, flags);
92
93 __mpc52xx_wkup_gpio_set(gc, gpio, val);
94
95 spin_unlock_irqrestore(&gpio_lock, flags);
96
97 pr_debug("%s: gpio: %d val: %d\n", __func__, gpio, val);
98}
99
100static int mpc52xx_wkup_gpio_dir_in(struct gpio_chip *gc, unsigned int gpio)
101{
102 struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
103 struct mpc52xx_gpiochip *chip = container_of(mm_gc,
104 struct mpc52xx_gpiochip, mmchip);
105 struct mpc52xx_gpio_wkup __iomem *regs = mm_gc->regs;
106 unsigned long flags;
107
108 spin_lock_irqsave(&gpio_lock, flags);
109
110 /* set the direction */
111 chip->shadow_ddr &= ~(1 << (7 - gpio));
112 out_8(®s->wkup_ddr, chip->shadow_ddr);
113
114 /* and enable the pin */
115 chip->shadow_gpioe |= 1 << (7 - gpio);
116 out_8(®s->wkup_gpioe, chip->shadow_gpioe);
117
118 spin_unlock_irqrestore(&gpio_lock, flags);
119
120 return 0;
121}
122
123static int
124mpc52xx_wkup_gpio_dir_out(struct gpio_chip *gc, unsigned int gpio, int val)
125{
126 struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
127 struct mpc52xx_gpio_wkup __iomem *regs = mm_gc->regs;
128 struct mpc52xx_gpiochip *chip = container_of(mm_gc,
129 struct mpc52xx_gpiochip, mmchip);
130 unsigned long flags;
131
132 spin_lock_irqsave(&gpio_lock, flags);
133
134 __mpc52xx_wkup_gpio_set(gc, gpio, val);
135
136 /* Then set direction */
137 chip->shadow_ddr |= 1 << (7 - gpio);
138 out_8(®s->wkup_ddr, chip->shadow_ddr);
139
140 /* Finally enable the pin */
141 chip->shadow_gpioe |= 1 << (7 - gpio);
142 out_8(®s->wkup_gpioe, chip->shadow_gpioe);
143
144 spin_unlock_irqrestore(&gpio_lock, flags);
145
146 pr_debug("%s: gpio: %d val: %d\n", __func__, gpio, val);
147
148 return 0;
149}
150
151static int mpc52xx_wkup_gpiochip_probe(struct platform_device *ofdev)
152{
153 struct mpc52xx_gpiochip *chip;
154 struct mpc52xx_gpio_wkup __iomem *regs;
155 struct gpio_chip *gc;
156 int ret;
157
158 chip = kzalloc(sizeof(*chip), GFP_KERNEL);
159 if (!chip)
160 return -ENOMEM;
161
162 gc = &chip->mmchip.gc;
163
164 gc->ngpio = 8;
165 gc->direction_input = mpc52xx_wkup_gpio_dir_in;
166 gc->direction_output = mpc52xx_wkup_gpio_dir_out;
167 gc->get = mpc52xx_wkup_gpio_get;
168 gc->set = mpc52xx_wkup_gpio_set;
169
170 ret = of_mm_gpiochip_add(ofdev->dev.of_node, &chip->mmchip);
171 if (ret)
172 return ret;
173
174 regs = chip->mmchip.regs;
175 chip->shadow_gpioe = in_8(®s->wkup_gpioe);
176 chip->shadow_ddr = in_8(®s->wkup_ddr);
177 chip->shadow_dvo = in_8(®s->wkup_dvo);
178
179 return 0;
180}
181
182static int mpc52xx_gpiochip_remove(struct platform_device *ofdev)
183{
184 return -EBUSY;
185}
186
187static const struct of_device_id mpc52xx_wkup_gpiochip_match[] = {
188 { .compatible = "fsl,mpc5200-gpio-wkup", },
189 {}
190};
191
192static struct platform_driver mpc52xx_wkup_gpiochip_driver = {
193 .driver = {
194 .name = "mpc5200-gpio-wkup",
195 .owner = THIS_MODULE,
196 .of_match_table = mpc52xx_wkup_gpiochip_match,
197 },
198 .probe = mpc52xx_wkup_gpiochip_probe,
199 .remove = mpc52xx_gpiochip_remove,
200};
201
202/*
203 * GPIO LIB API implementation for simple GPIOs
204 *
205 * There's a maximum of 32 simple GPIOs. Which of these are available
206 * for use depends on your board setup.
207 * The numbering reflects the bit numbering in the port registers:
208 *
209 * 0..1 > reserved
210 * 2..3 > IRDA
211 * 4..7 > ETHR
212 * 8..11 > reserved
213 * 12..15 > USB
214 * 16..17 > reserved
215 * 18..23 > PSC3
216 * 24..27 > PSC2
217 * 28..31 > PSC1
218 */
219static int mpc52xx_simple_gpio_get(struct gpio_chip *gc, unsigned int gpio)
220{
221 struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
222 struct mpc52xx_gpio __iomem *regs = mm_gc->regs;
223 unsigned int ret;
224
225 ret = (in_be32(®s->simple_ival) >> (31 - gpio)) & 1;
226
227 return ret;
228}
229
230static inline void
231__mpc52xx_simple_gpio_set(struct gpio_chip *gc, unsigned int gpio, int val)
232{
233 struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
234 struct mpc52xx_gpiochip *chip = container_of(mm_gc,
235 struct mpc52xx_gpiochip, mmchip);
236 struct mpc52xx_gpio __iomem *regs = mm_gc->regs;
237
238 if (val)
239 chip->shadow_dvo |= 1 << (31 - gpio);
240 else
241 chip->shadow_dvo &= ~(1 << (31 - gpio));
242 out_be32(®s->simple_dvo, chip->shadow_dvo);
243}
244
245static void
246mpc52xx_simple_gpio_set(struct gpio_chip *gc, unsigned int gpio, int val)
247{
248 unsigned long flags;
249
250 spin_lock_irqsave(&gpio_lock, flags);
251
252 __mpc52xx_simple_gpio_set(gc, gpio, val);
253
254 spin_unlock_irqrestore(&gpio_lock, flags);
255
256 pr_debug("%s: gpio: %d val: %d\n", __func__, gpio, val);
257}
258
259static int mpc52xx_simple_gpio_dir_in(struct gpio_chip *gc, unsigned int gpio)
260{
261 struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
262 struct mpc52xx_gpiochip *chip = container_of(mm_gc,
263 struct mpc52xx_gpiochip, mmchip);
264 struct mpc52xx_gpio __iomem *regs = mm_gc->regs;
265 unsigned long flags;
266
267 spin_lock_irqsave(&gpio_lock, flags);
268
269 /* set the direction */
270 chip->shadow_ddr &= ~(1 << (31 - gpio));
271 out_be32(®s->simple_ddr, chip->shadow_ddr);
272
273 /* and enable the pin */
274 chip->shadow_gpioe |= 1 << (31 - gpio);
275 out_be32(®s->simple_gpioe, chip->shadow_gpioe);
276
277 spin_unlock_irqrestore(&gpio_lock, flags);
278
279 return 0;
280}
281
282static int
283mpc52xx_simple_gpio_dir_out(struct gpio_chip *gc, unsigned int gpio, int val)
284{
285 struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
286 struct mpc52xx_gpiochip *chip = container_of(mm_gc,
287 struct mpc52xx_gpiochip, mmchip);
288 struct mpc52xx_gpio __iomem *regs = mm_gc->regs;
289 unsigned long flags;
290
291 spin_lock_irqsave(&gpio_lock, flags);
292
293 /* First set initial value */
294 __mpc52xx_simple_gpio_set(gc, gpio, val);
295
296 /* Then set direction */
297 chip->shadow_ddr |= 1 << (31 - gpio);
298 out_be32(®s->simple_ddr, chip->shadow_ddr);
299
300 /* Finally enable the pin */
301 chip->shadow_gpioe |= 1 << (31 - gpio);
302 out_be32(®s->simple_gpioe, chip->shadow_gpioe);
303
304 spin_unlock_irqrestore(&gpio_lock, flags);
305
306 pr_debug("%s: gpio: %d val: %d\n", __func__, gpio, val);
307
308 return 0;
309}
310
311static int mpc52xx_simple_gpiochip_probe(struct platform_device *ofdev)
312{
313 struct mpc52xx_gpiochip *chip;
314 struct gpio_chip *gc;
315 struct mpc52xx_gpio __iomem *regs;
316 int ret;
317
318 chip = kzalloc(sizeof(*chip), GFP_KERNEL);
319 if (!chip)
320 return -ENOMEM;
321
322 gc = &chip->mmchip.gc;
323
324 gc->ngpio = 32;
325 gc->direction_input = mpc52xx_simple_gpio_dir_in;
326 gc->direction_output = mpc52xx_simple_gpio_dir_out;
327 gc->get = mpc52xx_simple_gpio_get;
328 gc->set = mpc52xx_simple_gpio_set;
329
330 ret = of_mm_gpiochip_add(ofdev->dev.of_node, &chip->mmchip);
331 if (ret)
332 return ret;
333
334 regs = chip->mmchip.regs;
335 chip->shadow_gpioe = in_be32(®s->simple_gpioe);
336 chip->shadow_ddr = in_be32(®s->simple_ddr);
337 chip->shadow_dvo = in_be32(®s->simple_dvo);
338
339 return 0;
340}
341
342static const struct of_device_id mpc52xx_simple_gpiochip_match[] = {
343 { .compatible = "fsl,mpc5200-gpio", },
344 {}
345};
346
347static struct platform_driver mpc52xx_simple_gpiochip_driver = {
348 .driver = {
349 .name = "mpc5200-gpio",
350 .owner = THIS_MODULE,
351 .of_match_table = mpc52xx_simple_gpiochip_match,
352 },
353 .probe = mpc52xx_simple_gpiochip_probe,
354 .remove = mpc52xx_gpiochip_remove,
355};
356
357static int __init mpc52xx_gpio_init(void)
358{
359 if (platform_driver_register(&mpc52xx_wkup_gpiochip_driver))
360 printk(KERN_ERR "Unable to register wakeup GPIO driver\n");
361
362 if (platform_driver_register(&mpc52xx_simple_gpiochip_driver))
363 printk(KERN_ERR "Unable to register simple GPIO driver\n");
364
365 return 0;
366}
367
368
369/* Make sure we get initialised before anyone else tries to use us */
370subsys_initcall(mpc52xx_gpio_init);
371
372/* No exit call at the moment as we cannot unregister of gpio chips */
373
374MODULE_DESCRIPTION("Freescale MPC52xx gpio driver");
375MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de");
376MODULE_LICENSE("GPL v2");
377