1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (C) 2017 Hisilicon Limited, All Rights Reserved.
4 * Author: Zhichang Yuan <yuanzhichang@hisilicon.com>
5 * Author: Zou Rongrong <zourongrong@huawei.com>
6 * Author: John Garry <john.garry@huawei.com>
7 */
8
9 #include <linux/acpi.h>
10 #include <linux/console.h>
11 #include <linux/delay.h>
12 #include <linux/io.h>
13 #include <linux/logic_pio.h>
14 #include <linux/module.h>
15 #include <linux/of.h>
16 #include <linux/of_platform.h>
17 #include <linux/pci.h>
18 #include <linux/platform_device.h>
19 #include <linux/serial_8250.h>
20 #include <linux/slab.h>
21
22 #define DRV_NAME "hisi-lpc"
23
24 /*
25 * Setting this bit means each IO operation will target a different port
26 * address; 0 means repeated IO operations will use the same port,
27 * such as BT.
28 */
29 #define FG_INCRADDR_LPC 0x02
30
31 struct lpc_cycle_para {
32 unsigned int opflags;
33 unsigned int csize; /* data length of each operation */
34 };
35
36 struct hisi_lpc_dev {
37 spinlock_t cycle_lock;
38 void __iomem *membase;
39 struct logic_pio_hwaddr *io_host;
40 };
41
42 /* The max IO cycle counts supported is four per operation at maximum */
43 #define LPC_MAX_DWIDTH 4
44
45 #define LPC_REG_STARTUP_SIGNAL 0x00
46 #define LPC_REG_STARTUP_SIGNAL_START BIT(0)
47 #define LPC_REG_OP_STATUS 0x04
48 #define LPC_REG_OP_STATUS_IDLE BIT(0)
49 #define LPC_REG_OP_STATUS_FINISHED BIT(1)
50 #define LPC_REG_OP_LEN 0x10 /* LPC cycles count per start */
51 #define LPC_REG_CMD 0x14
52 #define LPC_REG_CMD_OP BIT(0) /* 0: read, 1: write */
53 #define LPC_REG_CMD_SAMEADDR BIT(3)
54 #define LPC_REG_ADDR 0x20 /* target address */
55 #define LPC_REG_WDATA 0x24 /* write FIFO */
56 #define LPC_REG_RDATA 0x28 /* read FIFO */
57
58 /* The minimal nanosecond interval for each query on LPC cycle status */
59 #define LPC_NSEC_PERWAIT 100
60
61 /*
62 * The maximum waiting time is about 128us. It is specific for stream I/O,
63 * such as ins.
64 *
65 * The fastest IO cycle time is about 390ns, but the worst case will wait
66 * for extra 256 lpc clocks, so (256 + 13) * 30ns = 8 us. The maximum burst
67 * cycles is 16. So, the maximum waiting time is about 128us under worst
68 * case.
69 *
70 * Choose 1300 as the maximum.
71 */
72 #define LPC_MAX_WAITCNT 1300
73
74 /* About 10us. This is specific for single IO operations, such as inb */
75 #define LPC_PEROP_WAITCNT 100
76
wait_lpc_idle(void __iomem * mbase,unsigned int waitcnt)77 static int wait_lpc_idle(void __iomem *mbase, unsigned int waitcnt)
78 {
79 u32 status;
80
81 do {
82 status = readl(mbase + LPC_REG_OP_STATUS);
83 if (status & LPC_REG_OP_STATUS_IDLE)
84 return (status & LPC_REG_OP_STATUS_FINISHED) ? 0 : -EIO;
85 ndelay(LPC_NSEC_PERWAIT);
86 } while (--waitcnt);
87
88 return -ETIMEDOUT;
89 }
90
91 /*
92 * hisi_lpc_target_in - trigger a series of LPC cycles for read operation
93 * @lpcdev: pointer to hisi lpc device
94 * @para: some parameters used to control the lpc I/O operations
95 * @addr: the lpc I/O target port address
96 * @buf: where the read back data is stored
97 * @opcnt: how many I/O operations required, i.e. data width
98 *
99 * Returns 0 on success, non-zero on fail.
100 */
hisi_lpc_target_in(struct hisi_lpc_dev * lpcdev,struct lpc_cycle_para * para,unsigned long addr,unsigned char * buf,unsigned long opcnt)101 static int hisi_lpc_target_in(struct hisi_lpc_dev *lpcdev,
102 struct lpc_cycle_para *para, unsigned long addr,
103 unsigned char *buf, unsigned long opcnt)
104 {
105 unsigned int cmd_word;
106 unsigned int waitcnt;
107 unsigned long flags;
108 int ret;
109
110 if (!buf || !opcnt || !para || !para->csize || !lpcdev)
111 return -EINVAL;
112
113 cmd_word = 0; /* IO mode, Read */
114 waitcnt = LPC_PEROP_WAITCNT;
115 if (!(para->opflags & FG_INCRADDR_LPC)) {
116 cmd_word |= LPC_REG_CMD_SAMEADDR;
117 waitcnt = LPC_MAX_WAITCNT;
118 }
119
120 /* whole operation must be atomic */
121 spin_lock_irqsave(&lpcdev->cycle_lock, flags);
122
123 writel_relaxed(opcnt, lpcdev->membase + LPC_REG_OP_LEN);
124 writel_relaxed(cmd_word, lpcdev->membase + LPC_REG_CMD);
125 writel_relaxed(addr, lpcdev->membase + LPC_REG_ADDR);
126
127 writel(LPC_REG_STARTUP_SIGNAL_START,
128 lpcdev->membase + LPC_REG_STARTUP_SIGNAL);
129
130 /* whether the operation is finished */
131 ret = wait_lpc_idle(lpcdev->membase, waitcnt);
132 if (ret) {
133 spin_unlock_irqrestore(&lpcdev->cycle_lock, flags);
134 return ret;
135 }
136
137 readsb(lpcdev->membase + LPC_REG_RDATA, buf, opcnt);
138
139 spin_unlock_irqrestore(&lpcdev->cycle_lock, flags);
140
141 return 0;
142 }
143
144 /*
145 * hisi_lpc_target_out - trigger a series of LPC cycles for write operation
146 * @lpcdev: pointer to hisi lpc device
147 * @para: some parameters used to control the lpc I/O operations
148 * @addr: the lpc I/O target port address
149 * @buf: where the data to be written is stored
150 * @opcnt: how many I/O operations required, i.e. data width
151 *
152 * Returns 0 on success, non-zero on fail.
153 */
hisi_lpc_target_out(struct hisi_lpc_dev * lpcdev,struct lpc_cycle_para * para,unsigned long addr,const unsigned char * buf,unsigned long opcnt)154 static int hisi_lpc_target_out(struct hisi_lpc_dev *lpcdev,
155 struct lpc_cycle_para *para, unsigned long addr,
156 const unsigned char *buf, unsigned long opcnt)
157 {
158 unsigned int waitcnt;
159 unsigned long flags;
160 u32 cmd_word;
161 int ret;
162
163 if (!buf || !opcnt || !para || !lpcdev)
164 return -EINVAL;
165
166 /* default is increasing address */
167 cmd_word = LPC_REG_CMD_OP; /* IO mode, write */
168 waitcnt = LPC_PEROP_WAITCNT;
169 if (!(para->opflags & FG_INCRADDR_LPC)) {
170 cmd_word |= LPC_REG_CMD_SAMEADDR;
171 waitcnt = LPC_MAX_WAITCNT;
172 }
173
174 spin_lock_irqsave(&lpcdev->cycle_lock, flags);
175
176 writel_relaxed(opcnt, lpcdev->membase + LPC_REG_OP_LEN);
177 writel_relaxed(cmd_word, lpcdev->membase + LPC_REG_CMD);
178 writel_relaxed(addr, lpcdev->membase + LPC_REG_ADDR);
179
180 writesb(lpcdev->membase + LPC_REG_WDATA, buf, opcnt);
181
182 writel(LPC_REG_STARTUP_SIGNAL_START,
183 lpcdev->membase + LPC_REG_STARTUP_SIGNAL);
184
185 /* whether the operation is finished */
186 ret = wait_lpc_idle(lpcdev->membase, waitcnt);
187
188 spin_unlock_irqrestore(&lpcdev->cycle_lock, flags);
189
190 return ret;
191 }
192
hisi_lpc_pio_to_addr(struct hisi_lpc_dev * lpcdev,unsigned long pio)193 static unsigned long hisi_lpc_pio_to_addr(struct hisi_lpc_dev *lpcdev,
194 unsigned long pio)
195 {
196 return pio - lpcdev->io_host->io_start + lpcdev->io_host->hw_start;
197 }
198
199 /*
200 * hisi_lpc_comm_in - input the data in a single operation
201 * @hostdata: pointer to the device information relevant to LPC controller
202 * @pio: the target I/O port address
203 * @dwidth: the data length required to read from the target I/O port
204 *
205 * When success, data is returned. Otherwise, ~0 is returned.
206 */
hisi_lpc_comm_in(void * hostdata,unsigned long pio,size_t dwidth)207 static u32 hisi_lpc_comm_in(void *hostdata, unsigned long pio, size_t dwidth)
208 {
209 struct hisi_lpc_dev *lpcdev = hostdata;
210 struct lpc_cycle_para iopara;
211 unsigned long addr;
212 __le32 rd_data = 0;
213 int ret;
214
215 if (!lpcdev || !dwidth || dwidth > LPC_MAX_DWIDTH)
216 return ~0;
217
218 addr = hisi_lpc_pio_to_addr(lpcdev, pio);
219
220 iopara.opflags = FG_INCRADDR_LPC;
221 iopara.csize = dwidth;
222
223 ret = hisi_lpc_target_in(lpcdev, &iopara, addr,
224 (unsigned char *)&rd_data, dwidth);
225 if (ret)
226 return ~0;
227
228 return le32_to_cpu(rd_data);
229 }
230
231 /*
232 * hisi_lpc_comm_out - output the data in a single operation
233 * @hostdata: pointer to the device information relevant to LPC controller
234 * @pio: the target I/O port address
235 * @val: a value to be output from caller, maximum is four bytes
236 * @dwidth: the data width required writing to the target I/O port
237 *
238 * This function corresponds to out(b,w,l) only.
239 */
hisi_lpc_comm_out(void * hostdata,unsigned long pio,u32 val,size_t dwidth)240 static void hisi_lpc_comm_out(void *hostdata, unsigned long pio,
241 u32 val, size_t dwidth)
242 {
243 struct hisi_lpc_dev *lpcdev = hostdata;
244 struct lpc_cycle_para iopara;
245 const unsigned char *buf;
246 unsigned long addr;
247 __le32 _val = cpu_to_le32(val);
248
249 if (!lpcdev || !dwidth || dwidth > LPC_MAX_DWIDTH)
250 return;
251
252 buf = (const unsigned char *)&_val;
253 addr = hisi_lpc_pio_to_addr(lpcdev, pio);
254
255 iopara.opflags = FG_INCRADDR_LPC;
256 iopara.csize = dwidth;
257
258 hisi_lpc_target_out(lpcdev, &iopara, addr, buf, dwidth);
259 }
260
261 /*
262 * hisi_lpc_comm_ins - input the data in the buffer in multiple operations
263 * @hostdata: pointer to the device information relevant to LPC controller
264 * @pio: the target I/O port address
265 * @buffer: a buffer where read/input data bytes are stored
266 * @dwidth: the data width required writing to the target I/O port
267 * @count: how many data units whose length is dwidth will be read
268 *
269 * When success, the data read back is stored in buffer pointed by buffer.
270 * Returns 0 on success, -errno otherwise.
271 */
hisi_lpc_comm_ins(void * hostdata,unsigned long pio,void * buffer,size_t dwidth,unsigned int count)272 static u32 hisi_lpc_comm_ins(void *hostdata, unsigned long pio, void *buffer,
273 size_t dwidth, unsigned int count)
274 {
275 struct hisi_lpc_dev *lpcdev = hostdata;
276 unsigned char *buf = buffer;
277 struct lpc_cycle_para iopara;
278 unsigned long addr;
279
280 if (!lpcdev || !buf || !count || !dwidth || dwidth > LPC_MAX_DWIDTH)
281 return -EINVAL;
282
283 iopara.opflags = 0;
284 if (dwidth > 1)
285 iopara.opflags |= FG_INCRADDR_LPC;
286 iopara.csize = dwidth;
287
288 addr = hisi_lpc_pio_to_addr(lpcdev, pio);
289
290 do {
291 int ret;
292
293 ret = hisi_lpc_target_in(lpcdev, &iopara, addr, buf, dwidth);
294 if (ret)
295 return ret;
296 buf += dwidth;
297 } while (--count);
298
299 return 0;
300 }
301
302 /*
303 * hisi_lpc_comm_outs - output the data in the buffer in multiple operations
304 * @hostdata: pointer to the device information relevant to LPC controller
305 * @pio: the target I/O port address
306 * @buffer: a buffer where write/output data bytes are stored
307 * @dwidth: the data width required writing to the target I/O port
308 * @count: how many data units whose length is dwidth will be written
309 */
hisi_lpc_comm_outs(void * hostdata,unsigned long pio,const void * buffer,size_t dwidth,unsigned int count)310 static void hisi_lpc_comm_outs(void *hostdata, unsigned long pio,
311 const void *buffer, size_t dwidth,
312 unsigned int count)
313 {
314 struct hisi_lpc_dev *lpcdev = hostdata;
315 struct lpc_cycle_para iopara;
316 const unsigned char *buf = buffer;
317 unsigned long addr;
318
319 if (!lpcdev || !buf || !count || !dwidth || dwidth > LPC_MAX_DWIDTH)
320 return;
321
322 iopara.opflags = 0;
323 if (dwidth > 1)
324 iopara.opflags |= FG_INCRADDR_LPC;
325 iopara.csize = dwidth;
326
327 addr = hisi_lpc_pio_to_addr(lpcdev, pio);
328 do {
329 if (hisi_lpc_target_out(lpcdev, &iopara, addr, buf, dwidth))
330 break;
331 buf += dwidth;
332 } while (--count);
333 }
334
335 static const struct logic_pio_host_ops hisi_lpc_ops = {
336 .in = hisi_lpc_comm_in,
337 .out = hisi_lpc_comm_out,
338 .ins = hisi_lpc_comm_ins,
339 .outs = hisi_lpc_comm_outs,
340 };
341
342 #ifdef CONFIG_ACPI
hisi_lpc_acpi_xlat_io_res(struct acpi_device * adev,struct acpi_device * host,struct resource * res)343 static int hisi_lpc_acpi_xlat_io_res(struct acpi_device *adev,
344 struct acpi_device *host,
345 struct resource *res)
346 {
347 unsigned long sys_port;
348 resource_size_t len = resource_size(res);
349
350 sys_port = logic_pio_trans_hwaddr(acpi_fwnode_handle(host), res->start, len);
351 if (sys_port == ~0UL)
352 return -EFAULT;
353
354 res->start = sys_port;
355 res->end = sys_port + len;
356
357 return 0;
358 }
359
360 /*
361 * Released firmware describes the IO port max address as 0x3fff, which is
362 * the max host bus address. Fixup to a proper range. This will probably
363 * never be fixed in firmware.
364 */
hisi_lpc_acpi_fixup_child_resource(struct device * hostdev,struct resource * r)365 static void hisi_lpc_acpi_fixup_child_resource(struct device *hostdev,
366 struct resource *r)
367 {
368 if (r->end != 0x3fff)
369 return;
370
371 if (r->start == 0xe4)
372 r->end = 0xe4 + 0x04 - 1;
373 else if (r->start == 0x2f8)
374 r->end = 0x2f8 + 0x08 - 1;
375 else
376 dev_warn(hostdev, "unrecognised resource %pR to fixup, ignoring\n",
377 r);
378 }
379
380 /*
381 * hisi_lpc_acpi_set_io_res - set the resources for a child
382 * @adev: ACPI companion of the device node to be updated the I/O resource
383 * @hostdev: the device node associated with host controller
384 * @res: double pointer to be set to the address of translated resources
385 * @num_res: pointer to variable to hold the number of translated resources
386 *
387 * Returns 0 when successful, and a negative value for failure.
388 *
389 * For a given host controller, each child device will have an associated
390 * host-relative address resource. This function will return the translated
391 * logical PIO addresses for each child devices resources.
392 */
hisi_lpc_acpi_set_io_res(struct acpi_device * adev,struct device * hostdev,const struct resource ** res,int * num_res)393 static int hisi_lpc_acpi_set_io_res(struct acpi_device *adev,
394 struct device *hostdev,
395 const struct resource **res, int *num_res)
396 {
397 struct acpi_device *host = to_acpi_device(adev->dev.parent);
398 struct resource_entry *rentry;
399 LIST_HEAD(resource_list);
400 struct resource *resources;
401 int count;
402 int i;
403
404 if (!adev->status.present) {
405 dev_dbg(&adev->dev, "device is not present\n");
406 return -EIO;
407 }
408
409 if (acpi_device_enumerated(adev)) {
410 dev_dbg(&adev->dev, "has been enumerated\n");
411 return -EIO;
412 }
413
414 /*
415 * The following code segment to retrieve the resources is common to
416 * acpi_create_platform_device(), so consider a common helper function
417 * in future.
418 */
419 count = acpi_dev_get_resources(adev, &resource_list, NULL, NULL);
420 if (count <= 0) {
421 dev_dbg(&adev->dev, "failed to get resources\n");
422 return count ? count : -EIO;
423 }
424
425 resources = devm_kcalloc(hostdev, count, sizeof(*resources),
426 GFP_KERNEL);
427 if (!resources) {
428 dev_warn(hostdev, "could not allocate memory for %d resources\n",
429 count);
430 acpi_dev_free_resource_list(&resource_list);
431 return -ENOMEM;
432 }
433 count = 0;
434 list_for_each_entry(rentry, &resource_list, node) {
435 resources[count] = *rentry->res;
436 hisi_lpc_acpi_fixup_child_resource(hostdev, &resources[count]);
437 count++;
438 }
439
440 acpi_dev_free_resource_list(&resource_list);
441
442 /* translate the I/O resources */
443 for (i = 0; i < count; i++) {
444 int ret;
445
446 if (!(resources[i].flags & IORESOURCE_IO))
447 continue;
448 ret = hisi_lpc_acpi_xlat_io_res(adev, host, &resources[i]);
449 if (ret) {
450 dev_err(&adev->dev, "translate IO range %pR failed (%d)\n",
451 &resources[i], ret);
452 return ret;
453 }
454 }
455 *res = resources;
456 *num_res = count;
457
458 return 0;
459 }
460
hisi_lpc_acpi_remove_subdev(struct device * dev,void * unused)461 static int hisi_lpc_acpi_remove_subdev(struct device *dev, void *unused)
462 {
463 platform_device_unregister(to_platform_device(dev));
464 return 0;
465 }
466
hisi_lpc_acpi_clear_enumerated(struct acpi_device * adev,void * not_used)467 static int hisi_lpc_acpi_clear_enumerated(struct acpi_device *adev, void *not_used)
468 {
469 acpi_device_clear_enumerated(adev);
470 return 0;
471 }
472
473 struct hisi_lpc_acpi_cell {
474 const char *hid;
475 const struct platform_device_info *pdevinfo;
476 };
477
hisi_lpc_acpi_remove(struct device * hostdev)478 static void hisi_lpc_acpi_remove(struct device *hostdev)
479 {
480 device_for_each_child(hostdev, NULL, hisi_lpc_acpi_remove_subdev);
481 acpi_dev_for_each_child(ACPI_COMPANION(hostdev),
482 hisi_lpc_acpi_clear_enumerated, NULL);
483 }
484
hisi_lpc_acpi_add_child(struct acpi_device * child,void * data)485 static int hisi_lpc_acpi_add_child(struct acpi_device *child, void *data)
486 {
487 const char *hid = acpi_device_hid(child);
488 struct device *hostdev = data;
489 const struct hisi_lpc_acpi_cell *cell;
490 struct platform_device *pdev;
491 const struct resource *res;
492 bool found = false;
493 int num_res;
494 int ret;
495
496 ret = hisi_lpc_acpi_set_io_res(child, hostdev, &res, &num_res);
497 if (ret) {
498 dev_warn(hostdev, "set resource fail (%d)\n", ret);
499 return ret;
500 }
501
502 cell = (struct hisi_lpc_acpi_cell []){
503 /* ipmi */
504 {
505 .hid = "IPI0001",
506 .pdevinfo = (struct platform_device_info []) {
507 {
508 .parent = hostdev,
509 .fwnode = acpi_fwnode_handle(child),
510 .name = "hisi-lpc-ipmi",
511 .id = PLATFORM_DEVID_AUTO,
512 .res = res,
513 .num_res = num_res,
514 },
515 },
516 },
517 /* 8250-compatible uart */
518 {
519 .hid = "HISI1031",
520 .pdevinfo = (struct platform_device_info []) {
521 {
522 .parent = hostdev,
523 .fwnode = acpi_fwnode_handle(child),
524 .name = "serial8250",
525 .id = PLATFORM_DEVID_AUTO,
526 .res = res,
527 .num_res = num_res,
528 .data = (struct plat_serial8250_port []) {
529 {
530 .iobase = res->start,
531 .uartclk = 1843200,
532 .iotype = UPIO_PORT,
533 .flags = UPF_BOOT_AUTOCONF,
534 },
535 {}
536 },
537 .size_data = 2 * sizeof(struct plat_serial8250_port),
538 },
539 },
540 },
541 {}
542 };
543
544 for (; cell && cell->hid; cell++) {
545 if (!strcmp(cell->hid, hid)) {
546 found = true;
547 break;
548 }
549 }
550
551 if (!found) {
552 dev_warn(hostdev,
553 "could not find cell for child device (%s), discarding\n",
554 hid);
555 return 0;
556 }
557
558 pdev = platform_device_register_full(cell->pdevinfo);
559 if (IS_ERR(pdev))
560 return PTR_ERR(pdev);
561
562 acpi_device_set_enumerated(child);
563 return 0;
564 }
565
566 /*
567 * hisi_lpc_acpi_probe - probe children for ACPI FW
568 * @hostdev: LPC host device pointer
569 *
570 * Returns 0 when successful, and a negative value for failure.
571 *
572 * Create a platform device per child, fixing up the resources
573 * from bus addresses to Logical PIO addresses.
574 *
575 */
hisi_lpc_acpi_probe(struct device * hostdev)576 static int hisi_lpc_acpi_probe(struct device *hostdev)
577 {
578 int ret;
579
580 /* Only consider the children of the host */
581 ret = acpi_dev_for_each_child(ACPI_COMPANION(hostdev),
582 hisi_lpc_acpi_add_child, hostdev);
583 if (ret)
584 hisi_lpc_acpi_remove(hostdev);
585
586 return ret;
587 }
588 #else
hisi_lpc_acpi_probe(struct device * dev)589 static int hisi_lpc_acpi_probe(struct device *dev)
590 {
591 return -ENODEV;
592 }
593
hisi_lpc_acpi_remove(struct device * hostdev)594 static void hisi_lpc_acpi_remove(struct device *hostdev)
595 {
596 }
597 #endif // CONFIG_ACPI
598
599 /*
600 * hisi_lpc_probe - the probe callback function for hisi lpc host,
601 * will finish all the initialization.
602 * @pdev: the platform device corresponding to hisi lpc host
603 *
604 * Returns 0 on success, non-zero on fail.
605 */
hisi_lpc_probe(struct platform_device * pdev)606 static int hisi_lpc_probe(struct platform_device *pdev)
607 {
608 struct device *dev = &pdev->dev;
609 struct logic_pio_hwaddr *range;
610 struct hisi_lpc_dev *lpcdev;
611 resource_size_t io_end;
612 int ret;
613
614 lpcdev = devm_kzalloc(dev, sizeof(*lpcdev), GFP_KERNEL);
615 if (!lpcdev)
616 return -ENOMEM;
617
618 spin_lock_init(&lpcdev->cycle_lock);
619
620 lpcdev->membase = devm_platform_ioremap_resource(pdev, 0);
621 if (IS_ERR(lpcdev->membase))
622 return PTR_ERR(lpcdev->membase);
623
624 range = devm_kzalloc(dev, sizeof(*range), GFP_KERNEL);
625 if (!range)
626 return -ENOMEM;
627
628 range->fwnode = dev_fwnode(dev);
629 range->flags = LOGIC_PIO_INDIRECT;
630 range->size = PIO_INDIRECT_SIZE;
631 range->hostdata = lpcdev;
632 range->ops = &hisi_lpc_ops;
633 lpcdev->io_host = range;
634
635 ret = logic_pio_register_range(range);
636 if (ret) {
637 dev_err(dev, "register IO range failed (%d)!\n", ret);
638 return ret;
639 }
640
641 /* register the LPC host PIO resources */
642 if (is_acpi_device_node(range->fwnode))
643 ret = hisi_lpc_acpi_probe(dev);
644 else
645 ret = of_platform_populate(dev->of_node, NULL, NULL, dev);
646 if (ret) {
647 logic_pio_unregister_range(range);
648 return ret;
649 }
650
651 dev_set_drvdata(dev, lpcdev);
652
653 io_end = lpcdev->io_host->io_start + lpcdev->io_host->size;
654 dev_info(dev, "registered range [%pa - %pa]\n",
655 &lpcdev->io_host->io_start, &io_end);
656
657 return ret;
658 }
659
hisi_lpc_remove(struct platform_device * pdev)660 static int hisi_lpc_remove(struct platform_device *pdev)
661 {
662 struct device *dev = &pdev->dev;
663 struct hisi_lpc_dev *lpcdev = dev_get_drvdata(dev);
664 struct logic_pio_hwaddr *range = lpcdev->io_host;
665
666 if (is_acpi_device_node(range->fwnode))
667 hisi_lpc_acpi_remove(dev);
668 else
669 of_platform_depopulate(dev);
670
671 logic_pio_unregister_range(range);
672
673 return 0;
674 }
675
676 static const struct of_device_id hisi_lpc_of_match[] = {
677 { .compatible = "hisilicon,hip06-lpc", },
678 { .compatible = "hisilicon,hip07-lpc", },
679 {}
680 };
681
682 static const struct acpi_device_id hisi_lpc_acpi_match[] = {
683 {"HISI0191"},
684 {}
685 };
686
687 static struct platform_driver hisi_lpc_driver = {
688 .driver = {
689 .name = DRV_NAME,
690 .of_match_table = hisi_lpc_of_match,
691 .acpi_match_table = hisi_lpc_acpi_match,
692 },
693 .probe = hisi_lpc_probe,
694 .remove = hisi_lpc_remove,
695 };
696 builtin_platform_driver(hisi_lpc_driver);
697
