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