x86/speculation/mds: Fix documentation typo
[linux/fpc-iii.git] / drivers / pci / host / pcie-xilinx.c
blob29f024f0ed7f2c2e8c0ab134a9f7949f09e8a9f8
1 /*
2 * PCIe host controller driver for Xilinx AXI PCIe Bridge
4 * Copyright (c) 2012 - 2014 Xilinx, Inc.
6 * Based on the Tegra PCIe driver
8 * Bits taken from Synopsys DesignWare Host controller driver and
9 * ARM PCI Host generic driver.
11 * This program is free software: you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation, either version 2 of the License, or
14 * (at your option) any later version.
17 #include <linux/interrupt.h>
18 #include <linux/irq.h>
19 #include <linux/irqdomain.h>
20 #include <linux/kernel.h>
21 #include <linux/init.h>
22 #include <linux/msi.h>
23 #include <linux/of_address.h>
24 #include <linux/of_pci.h>
25 #include <linux/of_platform.h>
26 #include <linux/of_irq.h>
27 #include <linux/pci.h>
28 #include <linux/platform_device.h>
30 /* Register definitions */
31 #define XILINX_PCIE_REG_BIR 0x00000130
32 #define XILINX_PCIE_REG_IDR 0x00000138
33 #define XILINX_PCIE_REG_IMR 0x0000013c
34 #define XILINX_PCIE_REG_PSCR 0x00000144
35 #define XILINX_PCIE_REG_RPSC 0x00000148
36 #define XILINX_PCIE_REG_MSIBASE1 0x0000014c
37 #define XILINX_PCIE_REG_MSIBASE2 0x00000150
38 #define XILINX_PCIE_REG_RPEFR 0x00000154
39 #define XILINX_PCIE_REG_RPIFR1 0x00000158
40 #define XILINX_PCIE_REG_RPIFR2 0x0000015c
42 /* Interrupt registers definitions */
43 #define XILINX_PCIE_INTR_LINK_DOWN BIT(0)
44 #define XILINX_PCIE_INTR_ECRC_ERR BIT(1)
45 #define XILINX_PCIE_INTR_STR_ERR BIT(2)
46 #define XILINX_PCIE_INTR_HOT_RESET BIT(3)
47 #define XILINX_PCIE_INTR_CFG_TIMEOUT BIT(8)
48 #define XILINX_PCIE_INTR_CORRECTABLE BIT(9)
49 #define XILINX_PCIE_INTR_NONFATAL BIT(10)
50 #define XILINX_PCIE_INTR_FATAL BIT(11)
51 #define XILINX_PCIE_INTR_INTX BIT(16)
52 #define XILINX_PCIE_INTR_MSI BIT(17)
53 #define XILINX_PCIE_INTR_SLV_UNSUPP BIT(20)
54 #define XILINX_PCIE_INTR_SLV_UNEXP BIT(21)
55 #define XILINX_PCIE_INTR_SLV_COMPL BIT(22)
56 #define XILINX_PCIE_INTR_SLV_ERRP BIT(23)
57 #define XILINX_PCIE_INTR_SLV_CMPABT BIT(24)
58 #define XILINX_PCIE_INTR_SLV_ILLBUR BIT(25)
59 #define XILINX_PCIE_INTR_MST_DECERR BIT(26)
60 #define XILINX_PCIE_INTR_MST_SLVERR BIT(27)
61 #define XILINX_PCIE_INTR_MST_ERRP BIT(28)
62 #define XILINX_PCIE_IMR_ALL_MASK 0x1FF30FED
63 #define XILINX_PCIE_IMR_ENABLE_MASK 0x1FF30F0D
64 #define XILINX_PCIE_IDR_ALL_MASK 0xFFFFFFFF
66 /* Root Port Error FIFO Read Register definitions */
67 #define XILINX_PCIE_RPEFR_ERR_VALID BIT(18)
68 #define XILINX_PCIE_RPEFR_REQ_ID GENMASK(15, 0)
69 #define XILINX_PCIE_RPEFR_ALL_MASK 0xFFFFFFFF
71 /* Root Port Interrupt FIFO Read Register 1 definitions */
72 #define XILINX_PCIE_RPIFR1_INTR_VALID BIT(31)
73 #define XILINX_PCIE_RPIFR1_MSI_INTR BIT(30)
74 #define XILINX_PCIE_RPIFR1_INTR_MASK GENMASK(28, 27)
75 #define XILINX_PCIE_RPIFR1_ALL_MASK 0xFFFFFFFF
76 #define XILINX_PCIE_RPIFR1_INTR_SHIFT 27
78 /* Bridge Info Register definitions */
79 #define XILINX_PCIE_BIR_ECAM_SZ_MASK GENMASK(18, 16)
80 #define XILINX_PCIE_BIR_ECAM_SZ_SHIFT 16
82 /* Root Port Interrupt FIFO Read Register 2 definitions */
83 #define XILINX_PCIE_RPIFR2_MSG_DATA GENMASK(15, 0)
85 /* Root Port Status/control Register definitions */
86 #define XILINX_PCIE_REG_RPSC_BEN BIT(0)
88 /* Phy Status/Control Register definitions */
89 #define XILINX_PCIE_REG_PSCR_LNKUP BIT(11)
91 /* ECAM definitions */
92 #define ECAM_BUS_NUM_SHIFT 20
93 #define ECAM_DEV_NUM_SHIFT 12
95 /* Number of MSI IRQs */
96 #define XILINX_NUM_MSI_IRQS 128
98 /**
99 * struct xilinx_pcie_port - PCIe port information
100 * @reg_base: IO Mapped Register Base
101 * @irq: Interrupt number
102 * @msi_pages: MSI pages
103 * @root_busno: Root Bus number
104 * @dev: Device pointer
105 * @msi_domain: MSI IRQ domain pointer
106 * @leg_domain: Legacy IRQ domain pointer
107 * @resources: Bus Resources
109 struct xilinx_pcie_port {
110 void __iomem *reg_base;
111 u32 irq;
112 unsigned long msi_pages;
113 u8 root_busno;
114 struct device *dev;
115 struct irq_domain *msi_domain;
116 struct irq_domain *leg_domain;
117 struct list_head resources;
120 static DECLARE_BITMAP(msi_irq_in_use, XILINX_NUM_MSI_IRQS);
122 static inline u32 pcie_read(struct xilinx_pcie_port *port, u32 reg)
124 return readl(port->reg_base + reg);
127 static inline void pcie_write(struct xilinx_pcie_port *port, u32 val, u32 reg)
129 writel(val, port->reg_base + reg);
132 static inline bool xilinx_pcie_link_is_up(struct xilinx_pcie_port *port)
134 return (pcie_read(port, XILINX_PCIE_REG_PSCR) &
135 XILINX_PCIE_REG_PSCR_LNKUP) ? 1 : 0;
139 * xilinx_pcie_clear_err_interrupts - Clear Error Interrupts
140 * @port: PCIe port information
142 static void xilinx_pcie_clear_err_interrupts(struct xilinx_pcie_port *port)
144 struct device *dev = port->dev;
145 unsigned long val = pcie_read(port, XILINX_PCIE_REG_RPEFR);
147 if (val & XILINX_PCIE_RPEFR_ERR_VALID) {
148 dev_dbg(dev, "Requester ID %lu\n",
149 val & XILINX_PCIE_RPEFR_REQ_ID);
150 pcie_write(port, XILINX_PCIE_RPEFR_ALL_MASK,
151 XILINX_PCIE_REG_RPEFR);
156 * xilinx_pcie_valid_device - Check if a valid device is present on bus
157 * @bus: PCI Bus structure
158 * @devfn: device/function
160 * Return: 'true' on success and 'false' if invalid device is found
162 static bool xilinx_pcie_valid_device(struct pci_bus *bus, unsigned int devfn)
164 struct xilinx_pcie_port *port = bus->sysdata;
166 /* Check if link is up when trying to access downstream ports */
167 if (bus->number != port->root_busno)
168 if (!xilinx_pcie_link_is_up(port))
169 return false;
171 /* Only one device down on each root port */
172 if (bus->number == port->root_busno && devfn > 0)
173 return false;
175 return true;
179 * xilinx_pcie_map_bus - Get configuration base
180 * @bus: PCI Bus structure
181 * @devfn: Device/function
182 * @where: Offset from base
184 * Return: Base address of the configuration space needed to be
185 * accessed.
187 static void __iomem *xilinx_pcie_map_bus(struct pci_bus *bus,
188 unsigned int devfn, int where)
190 struct xilinx_pcie_port *port = bus->sysdata;
191 int relbus;
193 if (!xilinx_pcie_valid_device(bus, devfn))
194 return NULL;
196 relbus = (bus->number << ECAM_BUS_NUM_SHIFT) |
197 (devfn << ECAM_DEV_NUM_SHIFT);
199 return port->reg_base + relbus + where;
202 /* PCIe operations */
203 static struct pci_ops xilinx_pcie_ops = {
204 .map_bus = xilinx_pcie_map_bus,
205 .read = pci_generic_config_read,
206 .write = pci_generic_config_write,
209 /* MSI functions */
212 * xilinx_pcie_destroy_msi - Free MSI number
213 * @irq: IRQ to be freed
215 static void xilinx_pcie_destroy_msi(unsigned int irq)
217 struct msi_desc *msi;
218 struct xilinx_pcie_port *port;
219 struct irq_data *d = irq_get_irq_data(irq);
220 irq_hw_number_t hwirq = irqd_to_hwirq(d);
222 if (!test_bit(hwirq, msi_irq_in_use)) {
223 msi = irq_get_msi_desc(irq);
224 port = msi_desc_to_pci_sysdata(msi);
225 dev_err(port->dev, "Trying to free unused MSI#%d\n", irq);
226 } else {
227 clear_bit(hwirq, msi_irq_in_use);
232 * xilinx_pcie_assign_msi - Allocate MSI number
234 * Return: A valid IRQ on success and error value on failure.
236 static int xilinx_pcie_assign_msi(void)
238 int pos;
240 pos = find_first_zero_bit(msi_irq_in_use, XILINX_NUM_MSI_IRQS);
241 if (pos < XILINX_NUM_MSI_IRQS)
242 set_bit(pos, msi_irq_in_use);
243 else
244 return -ENOSPC;
246 return pos;
250 * xilinx_msi_teardown_irq - Destroy the MSI
251 * @chip: MSI Chip descriptor
252 * @irq: MSI IRQ to destroy
254 static void xilinx_msi_teardown_irq(struct msi_controller *chip,
255 unsigned int irq)
257 xilinx_pcie_destroy_msi(irq);
258 irq_dispose_mapping(irq);
262 * xilinx_pcie_msi_setup_irq - Setup MSI request
263 * @chip: MSI chip pointer
264 * @pdev: PCIe device pointer
265 * @desc: MSI descriptor pointer
267 * Return: '0' on success and error value on failure
269 static int xilinx_pcie_msi_setup_irq(struct msi_controller *chip,
270 struct pci_dev *pdev,
271 struct msi_desc *desc)
273 struct xilinx_pcie_port *port = pdev->bus->sysdata;
274 unsigned int irq;
275 int hwirq;
276 struct msi_msg msg;
277 phys_addr_t msg_addr;
279 hwirq = xilinx_pcie_assign_msi();
280 if (hwirq < 0)
281 return hwirq;
283 irq = irq_create_mapping(port->msi_domain, hwirq);
284 if (!irq)
285 return -EINVAL;
287 irq_set_msi_desc(irq, desc);
289 msg_addr = virt_to_phys((void *)port->msi_pages);
291 msg.address_hi = 0;
292 msg.address_lo = msg_addr;
293 msg.data = irq;
295 pci_write_msi_msg(irq, &msg);
297 return 0;
300 /* MSI Chip Descriptor */
301 static struct msi_controller xilinx_pcie_msi_chip = {
302 .setup_irq = xilinx_pcie_msi_setup_irq,
303 .teardown_irq = xilinx_msi_teardown_irq,
306 /* HW Interrupt Chip Descriptor */
307 static struct irq_chip xilinx_msi_irq_chip = {
308 .name = "Xilinx PCIe MSI",
309 .irq_enable = pci_msi_unmask_irq,
310 .irq_disable = pci_msi_mask_irq,
311 .irq_mask = pci_msi_mask_irq,
312 .irq_unmask = pci_msi_unmask_irq,
316 * xilinx_pcie_msi_map - Set the handler for the MSI and mark IRQ as valid
317 * @domain: IRQ domain
318 * @irq: Virtual IRQ number
319 * @hwirq: HW interrupt number
321 * Return: Always returns 0.
323 static int xilinx_pcie_msi_map(struct irq_domain *domain, unsigned int irq,
324 irq_hw_number_t hwirq)
326 irq_set_chip_and_handler(irq, &xilinx_msi_irq_chip, handle_simple_irq);
327 irq_set_chip_data(irq, domain->host_data);
329 return 0;
332 /* IRQ Domain operations */
333 static const struct irq_domain_ops msi_domain_ops = {
334 .map = xilinx_pcie_msi_map,
338 * xilinx_pcie_enable_msi - Enable MSI support
339 * @port: PCIe port information
341 static void xilinx_pcie_enable_msi(struct xilinx_pcie_port *port)
343 phys_addr_t msg_addr;
345 port->msi_pages = __get_free_pages(GFP_KERNEL, 0);
346 msg_addr = virt_to_phys((void *)port->msi_pages);
347 pcie_write(port, 0x0, XILINX_PCIE_REG_MSIBASE1);
348 pcie_write(port, msg_addr, XILINX_PCIE_REG_MSIBASE2);
351 /* INTx Functions */
354 * xilinx_pcie_intx_map - Set the handler for the INTx and mark IRQ as valid
355 * @domain: IRQ domain
356 * @irq: Virtual IRQ number
357 * @hwirq: HW interrupt number
359 * Return: Always returns 0.
361 static int xilinx_pcie_intx_map(struct irq_domain *domain, unsigned int irq,
362 irq_hw_number_t hwirq)
364 irq_set_chip_and_handler(irq, &dummy_irq_chip, handle_simple_irq);
365 irq_set_chip_data(irq, domain->host_data);
367 return 0;
370 /* INTx IRQ Domain operations */
371 static const struct irq_domain_ops intx_domain_ops = {
372 .map = xilinx_pcie_intx_map,
373 .xlate = pci_irqd_intx_xlate,
376 /* PCIe HW Functions */
379 * xilinx_pcie_intr_handler - Interrupt Service Handler
380 * @irq: IRQ number
381 * @data: PCIe port information
383 * Return: IRQ_HANDLED on success and IRQ_NONE on failure
385 static irqreturn_t xilinx_pcie_intr_handler(int irq, void *data)
387 struct xilinx_pcie_port *port = (struct xilinx_pcie_port *)data;
388 struct device *dev = port->dev;
389 u32 val, mask, status;
391 /* Read interrupt decode and mask registers */
392 val = pcie_read(port, XILINX_PCIE_REG_IDR);
393 mask = pcie_read(port, XILINX_PCIE_REG_IMR);
395 status = val & mask;
396 if (!status)
397 return IRQ_NONE;
399 if (status & XILINX_PCIE_INTR_LINK_DOWN)
400 dev_warn(dev, "Link Down\n");
402 if (status & XILINX_PCIE_INTR_ECRC_ERR)
403 dev_warn(dev, "ECRC failed\n");
405 if (status & XILINX_PCIE_INTR_STR_ERR)
406 dev_warn(dev, "Streaming error\n");
408 if (status & XILINX_PCIE_INTR_HOT_RESET)
409 dev_info(dev, "Hot reset\n");
411 if (status & XILINX_PCIE_INTR_CFG_TIMEOUT)
412 dev_warn(dev, "ECAM access timeout\n");
414 if (status & XILINX_PCIE_INTR_CORRECTABLE) {
415 dev_warn(dev, "Correctable error message\n");
416 xilinx_pcie_clear_err_interrupts(port);
419 if (status & XILINX_PCIE_INTR_NONFATAL) {
420 dev_warn(dev, "Non fatal error message\n");
421 xilinx_pcie_clear_err_interrupts(port);
424 if (status & XILINX_PCIE_INTR_FATAL) {
425 dev_warn(dev, "Fatal error message\n");
426 xilinx_pcie_clear_err_interrupts(port);
429 if (status & (XILINX_PCIE_INTR_INTX | XILINX_PCIE_INTR_MSI)) {
430 val = pcie_read(port, XILINX_PCIE_REG_RPIFR1);
432 /* Check whether interrupt valid */
433 if (!(val & XILINX_PCIE_RPIFR1_INTR_VALID)) {
434 dev_warn(dev, "RP Intr FIFO1 read error\n");
435 goto error;
438 /* Decode the IRQ number */
439 if (val & XILINX_PCIE_RPIFR1_MSI_INTR) {
440 val = pcie_read(port, XILINX_PCIE_REG_RPIFR2) &
441 XILINX_PCIE_RPIFR2_MSG_DATA;
442 } else {
443 val = (val & XILINX_PCIE_RPIFR1_INTR_MASK) >>
444 XILINX_PCIE_RPIFR1_INTR_SHIFT;
445 val = irq_find_mapping(port->leg_domain, val);
448 /* Clear interrupt FIFO register 1 */
449 pcie_write(port, XILINX_PCIE_RPIFR1_ALL_MASK,
450 XILINX_PCIE_REG_RPIFR1);
452 /* Handle the interrupt */
453 if (IS_ENABLED(CONFIG_PCI_MSI) ||
454 !(val & XILINX_PCIE_RPIFR1_MSI_INTR))
455 generic_handle_irq(val);
458 if (status & XILINX_PCIE_INTR_SLV_UNSUPP)
459 dev_warn(dev, "Slave unsupported request\n");
461 if (status & XILINX_PCIE_INTR_SLV_UNEXP)
462 dev_warn(dev, "Slave unexpected completion\n");
464 if (status & XILINX_PCIE_INTR_SLV_COMPL)
465 dev_warn(dev, "Slave completion timeout\n");
467 if (status & XILINX_PCIE_INTR_SLV_ERRP)
468 dev_warn(dev, "Slave Error Poison\n");
470 if (status & XILINX_PCIE_INTR_SLV_CMPABT)
471 dev_warn(dev, "Slave Completer Abort\n");
473 if (status & XILINX_PCIE_INTR_SLV_ILLBUR)
474 dev_warn(dev, "Slave Illegal Burst\n");
476 if (status & XILINX_PCIE_INTR_MST_DECERR)
477 dev_warn(dev, "Master decode error\n");
479 if (status & XILINX_PCIE_INTR_MST_SLVERR)
480 dev_warn(dev, "Master slave error\n");
482 if (status & XILINX_PCIE_INTR_MST_ERRP)
483 dev_warn(dev, "Master error poison\n");
485 error:
486 /* Clear the Interrupt Decode register */
487 pcie_write(port, status, XILINX_PCIE_REG_IDR);
489 return IRQ_HANDLED;
493 * xilinx_pcie_init_irq_domain - Initialize IRQ domain
494 * @port: PCIe port information
496 * Return: '0' on success and error value on failure
498 static int xilinx_pcie_init_irq_domain(struct xilinx_pcie_port *port)
500 struct device *dev = port->dev;
501 struct device_node *node = dev->of_node;
502 struct device_node *pcie_intc_node;
504 /* Setup INTx */
505 pcie_intc_node = of_get_next_child(node, NULL);
506 if (!pcie_intc_node) {
507 dev_err(dev, "No PCIe Intc node found\n");
508 return -ENODEV;
511 port->leg_domain = irq_domain_add_linear(pcie_intc_node, PCI_NUM_INTX,
512 &intx_domain_ops,
513 port);
514 of_node_put(pcie_intc_node);
515 if (!port->leg_domain) {
516 dev_err(dev, "Failed to get a INTx IRQ domain\n");
517 return -ENODEV;
520 /* Setup MSI */
521 if (IS_ENABLED(CONFIG_PCI_MSI)) {
522 port->msi_domain = irq_domain_add_linear(node,
523 XILINX_NUM_MSI_IRQS,
524 &msi_domain_ops,
525 &xilinx_pcie_msi_chip);
526 if (!port->msi_domain) {
527 dev_err(dev, "Failed to get a MSI IRQ domain\n");
528 return -ENODEV;
531 xilinx_pcie_enable_msi(port);
534 return 0;
538 * xilinx_pcie_init_port - Initialize hardware
539 * @port: PCIe port information
541 static void xilinx_pcie_init_port(struct xilinx_pcie_port *port)
543 struct device *dev = port->dev;
545 if (xilinx_pcie_link_is_up(port))
546 dev_info(dev, "PCIe Link is UP\n");
547 else
548 dev_info(dev, "PCIe Link is DOWN\n");
550 /* Disable all interrupts */
551 pcie_write(port, ~XILINX_PCIE_IDR_ALL_MASK,
552 XILINX_PCIE_REG_IMR);
554 /* Clear pending interrupts */
555 pcie_write(port, pcie_read(port, XILINX_PCIE_REG_IDR) &
556 XILINX_PCIE_IMR_ALL_MASK,
557 XILINX_PCIE_REG_IDR);
559 /* Enable all interrupts we handle */
560 pcie_write(port, XILINX_PCIE_IMR_ENABLE_MASK, XILINX_PCIE_REG_IMR);
562 /* Enable the Bridge enable bit */
563 pcie_write(port, pcie_read(port, XILINX_PCIE_REG_RPSC) |
564 XILINX_PCIE_REG_RPSC_BEN,
565 XILINX_PCIE_REG_RPSC);
569 * xilinx_pcie_parse_dt - Parse Device tree
570 * @port: PCIe port information
572 * Return: '0' on success and error value on failure
574 static int xilinx_pcie_parse_dt(struct xilinx_pcie_port *port)
576 struct device *dev = port->dev;
577 struct device_node *node = dev->of_node;
578 struct resource regs;
579 const char *type;
580 int err;
582 type = of_get_property(node, "device_type", NULL);
583 if (!type || strcmp(type, "pci")) {
584 dev_err(dev, "invalid \"device_type\" %s\n", type);
585 return -EINVAL;
588 err = of_address_to_resource(node, 0, &regs);
589 if (err) {
590 dev_err(dev, "missing \"reg\" property\n");
591 return err;
594 port->reg_base = devm_pci_remap_cfg_resource(dev, &regs);
595 if (IS_ERR(port->reg_base))
596 return PTR_ERR(port->reg_base);
598 port->irq = irq_of_parse_and_map(node, 0);
599 err = devm_request_irq(dev, port->irq, xilinx_pcie_intr_handler,
600 IRQF_SHARED | IRQF_NO_THREAD,
601 "xilinx-pcie", port);
602 if (err) {
603 dev_err(dev, "unable to request irq %d\n", port->irq);
604 return err;
607 return 0;
611 * xilinx_pcie_probe - Probe function
612 * @pdev: Platform device pointer
614 * Return: '0' on success and error value on failure
616 static int xilinx_pcie_probe(struct platform_device *pdev)
618 struct device *dev = &pdev->dev;
619 struct xilinx_pcie_port *port;
620 struct pci_bus *bus, *child;
621 struct pci_host_bridge *bridge;
622 int err;
623 resource_size_t iobase = 0;
624 LIST_HEAD(res);
626 if (!dev->of_node)
627 return -ENODEV;
629 bridge = devm_pci_alloc_host_bridge(dev, sizeof(*port));
630 if (!bridge)
631 return -ENODEV;
633 port = pci_host_bridge_priv(bridge);
635 port->dev = dev;
637 err = xilinx_pcie_parse_dt(port);
638 if (err) {
639 dev_err(dev, "Parsing DT failed\n");
640 return err;
643 xilinx_pcie_init_port(port);
645 err = xilinx_pcie_init_irq_domain(port);
646 if (err) {
647 dev_err(dev, "Failed creating IRQ Domain\n");
648 return err;
651 err = of_pci_get_host_bridge_resources(dev->of_node, 0, 0xff, &res,
652 &iobase);
653 if (err) {
654 dev_err(dev, "Getting bridge resources failed\n");
655 return err;
658 err = devm_request_pci_bus_resources(dev, &res);
659 if (err)
660 goto error;
663 list_splice_init(&res, &bridge->windows);
664 bridge->dev.parent = dev;
665 bridge->sysdata = port;
666 bridge->busnr = 0;
667 bridge->ops = &xilinx_pcie_ops;
668 bridge->map_irq = of_irq_parse_and_map_pci;
669 bridge->swizzle_irq = pci_common_swizzle;
671 #ifdef CONFIG_PCI_MSI
672 xilinx_pcie_msi_chip.dev = dev;
673 bridge->msi = &xilinx_pcie_msi_chip;
674 #endif
675 err = pci_scan_root_bus_bridge(bridge);
676 if (err < 0)
677 goto error;
679 bus = bridge->bus;
681 pci_assign_unassigned_bus_resources(bus);
682 list_for_each_entry(child, &bus->children, node)
683 pcie_bus_configure_settings(child);
684 pci_bus_add_devices(bus);
685 return 0;
687 error:
688 pci_free_resource_list(&res);
689 return err;
692 static const struct of_device_id xilinx_pcie_of_match[] = {
693 { .compatible = "xlnx,axi-pcie-host-1.00.a", },
697 static struct platform_driver xilinx_pcie_driver = {
698 .driver = {
699 .name = "xilinx-pcie",
700 .of_match_table = xilinx_pcie_of_match,
701 .suppress_bind_attrs = true,
703 .probe = xilinx_pcie_probe,
705 builtin_platform_driver(xilinx_pcie_driver);