CC: kbuild-...@lists.01.org TO: Kishon Vijay Abraham I <kis...@ti.com> CC: Vignesh Raghavendra <vigne...@ti.com>
tree: git://git.ti.com/ti-linux-kernel/ti-linux-kernel.git ti-rt-linux-5.10.y
head: abc20bb2f09a1001ca041b635f1241ddb2c5ea31
commit: d6c94541065433e99c45a5ba4280f2af08bd329a [4403/6600] PCI: j721e: Add
support to provide refclk to PCIe connector
:::::: branch date: 19 hours ago
:::::: commit date: 3 months ago
config: x86_64-randconfig-m001-20210622 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <l...@intel.com>
Reported-by: Dan Carpenter <dan.carpen...@oracle.com>
smatch warnings:
drivers/pci/controller/cadence/pci-j721e.c:417 j721e_pcie_probe() warn: missing
error code 'ret'
vim +/ret +417 drivers/pci/controller/cadence/pci-j721e.c
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 302
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 303 static int
j721e_pcie_probe(struct platform_device *pdev)
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 304 {
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 305 struct device *dev =
&pdev->dev;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 306 struct device_node
*node = dev->of_node;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 307 struct pci_host_bridge
*bridge;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 308 struct j721e_pcie_data
*data;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 309 struct cdns_pcie
*cdns_pcie;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 310 struct j721e_pcie *pcie;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 311 struct cdns_pcie_rc *rc;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 312 struct cdns_pcie_ep *ep;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 313 struct gpio_desc *gpiod;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 314 void __iomem *base;
d6c94541065433 Kishon Vijay Abraham I 2021-03-30 315 struct clk *clk;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 316 u32 num_lanes;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 317 u32 mode;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 318 int ret;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 319 int irq;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 320
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 321 data = (struct
j721e_pcie_data *)of_device_get_match_data(dev);
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 322 if (!data)
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 323 return -EINVAL;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 324
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 325 mode = (u32)data->mode;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 326
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 327 pcie =
devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL);
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 328 if (!pcie)
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 329 return -ENOMEM;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 330
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 331 pcie->dev = dev;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 332 pcie->mode = mode;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 333
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 334 base =
devm_platform_ioremap_resource_byname(pdev, "intd_cfg");
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 335 if (IS_ERR(base))
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 336 return
PTR_ERR(base);
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 337 pcie->intd_cfg_base =
base;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 338
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 339 base =
devm_platform_ioremap_resource_byname(pdev, "user_cfg");
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 340 if (IS_ERR(base))
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 341 return
PTR_ERR(base);
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 342 pcie->user_cfg_base =
base;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 343
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 344 ret =
of_property_read_u32(node, "num-lanes", &num_lanes);
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 345 if (ret || num_lanes >
MAX_LANES)
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 346 num_lanes = 1;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 347 pcie->num_lanes =
num_lanes;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 348
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 349 if
(dma_set_mask_and_coherent(dev, DMA_BIT_MASK(48)))
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 350 return -EINVAL;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 351
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 352 irq =
platform_get_irq_byname(pdev, "link_state");
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 353 if (irq < 0)
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 354 return irq;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 355
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 356 dev_set_drvdata(dev,
pcie);
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 357 pm_runtime_enable(dev);
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 358 ret =
pm_runtime_get_sync(dev);
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 359 if (ret < 0) {
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 360 dev_err(dev,
"pm_runtime_get_sync failed\n");
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 361 goto
err_get_sync;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 362 }
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 363
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 364 ret =
j721e_pcie_ctrl_init(pcie);
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 365 if (ret < 0) {
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 366 dev_err(dev,
"pm_runtime_get_sync failed\n");
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 367 goto
err_get_sync;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 368 }
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 369
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 370 ret =
devm_request_irq(dev, irq, j721e_pcie_link_irq_handler, 0,
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 371
"j721e-pcie-link-down-irq", pcie);
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 372 if (ret < 0) {
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 373 dev_err(dev,
"failed to request link state IRQ %d\n", irq);
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 374 goto
err_get_sync;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 375 }
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 376
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 377
j721e_pcie_config_link_irq(pcie);
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 378
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 379 switch (mode) {
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 380 case PCI_MODE_RC:
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 381 if
(!IS_ENABLED(CONFIG_PCIE_CADENCE_HOST)) {
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 382 ret =
-ENODEV;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 383 goto
err_get_sync;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 384 }
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 385
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 386 bridge =
devm_pci_alloc_host_bridge(dev, sizeof(*rc));
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 387 if (!bridge) {
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 388 ret =
-ENOMEM;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 389 goto
err_get_sync;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 390 }
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 391
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 392 bridge->ops =
&cdns_ti_pcie_host_ops;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 393 rc =
pci_host_bridge_priv(bridge);
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 394
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 395 cdns_pcie =
&rc->pcie;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 396 cdns_pcie->dev
= dev;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 397 cdns_pcie->ops
= &j721e_pcie_ops;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 398 pcie->cdns_pcie
= cdns_pcie;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 399
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 400 gpiod =
devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 401 if
(IS_ERR(gpiod)) {
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 402 ret =
PTR_ERR(gpiod);
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 403 if (ret
!= -EPROBE_DEFER)
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 404
dev_err(dev, "Failed to get reset GPIO\n");
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 405 goto
err_get_sync;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 406 }
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 407
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 408 ret =
cdns_pcie_init_phy(dev, cdns_pcie);
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 409 if (ret) {
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 410
dev_err(dev, "Failed to init phy\n");
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 411 goto
err_get_sync;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 412 }
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 413
d6c94541065433 Kishon Vijay Abraham I 2021-03-30 414 clk =
devm_clk_get_optional(dev, "pcie_refclk");
d6c94541065433 Kishon Vijay Abraham I 2021-03-30 415 if
(IS_ERR(clk)) {
d6c94541065433 Kishon Vijay Abraham I 2021-03-30 416
dev_err(dev, "failed to get pcie_refclk\n");
d6c94541065433 Kishon Vijay Abraham I 2021-03-30 @417 goto
err_pcie_setup;
d6c94541065433 Kishon Vijay Abraham I 2021-03-30 418 }
d6c94541065433 Kishon Vijay Abraham I 2021-03-30 419
d6c94541065433 Kishon Vijay Abraham I 2021-03-30 420 ret =
clk_prepare_enable(clk);
d6c94541065433 Kishon Vijay Abraham I 2021-03-30 421 if (ret) {
d6c94541065433 Kishon Vijay Abraham I 2021-03-30 422
dev_err(dev, "failed to enable pcie_refclk\n");
d6c94541065433 Kishon Vijay Abraham I 2021-03-30 423 goto
err_get_sync;
d6c94541065433 Kishon Vijay Abraham I 2021-03-30 424 }
d6c94541065433 Kishon Vijay Abraham I 2021-03-30 425 pcie->refclk =
clk;
d6c94541065433 Kishon Vijay Abraham I 2021-03-30 426
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 427 /*
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 428 * "Power
Sequencing and Reset Signal Timings" table in
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 429 * PCI EXPRESS
CARD ELECTROMECHANICAL SPECIFICATION, REV. 3.0
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 430 * indicates
PERST# should be deasserted after minimum of 100us
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 431 * once REFCLK
is stable. The REFCLK to the connector in RC
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 432 * mode is
selected while enabling the PHY. So deassert PERST#
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 433 * after 100 us.
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 434 */
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 435 if (gpiod) {
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 436
usleep_range(100, 200);
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 437
gpiod_set_value_cansleep(gpiod, 1);
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 438 }
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 439
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 440 ret =
cdns_pcie_host_setup(rc);
d6c94541065433 Kishon Vijay Abraham I 2021-03-30 441 if (ret < 0) {
d6c94541065433 Kishon Vijay Abraham I 2021-03-30 442
clk_disable_unprepare(pcie->refclk);
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 443 goto
err_pcie_setup;
d6c94541065433 Kishon Vijay Abraham I 2021-03-30 444 }
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 445
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 446 break;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 447 case PCI_MODE_EP:
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 448 if
(!IS_ENABLED(CONFIG_PCIE_CADENCE_EP)) {
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 449 ret =
-ENODEV;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 450 goto
err_get_sync;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 451 }
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 452
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 453 ep =
devm_kzalloc(dev, sizeof(*ep), GFP_KERNEL);
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 454 if (!ep) {
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 455 ret =
-ENOMEM;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 456 goto
err_get_sync;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 457 }
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 458
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 459 cdns_pcie =
&ep->pcie;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 460 cdns_pcie->dev
= dev;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 461 cdns_pcie->ops
= &j721e_pcie_ops;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 462 pcie->cdns_pcie
= cdns_pcie;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 463
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 464 ret =
cdns_pcie_init_phy(dev, cdns_pcie);
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 465 if (ret) {
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 466
dev_err(dev, "Failed to init phy\n");
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 467 goto
err_get_sync;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 468 }
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 469
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 470 ret =
cdns_pcie_ep_setup(ep);
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 471 if (ret < 0)
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 472 goto
err_pcie_setup;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 473
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 474 break;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 475 default:
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 476 dev_err(dev,
"INVALID device type %d\n", mode);
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 477 }
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 478
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 479 return 0;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 480
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 481 err_pcie_setup:
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 482
cdns_pcie_disable_phy(cdns_pcie);
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 483
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 484 err_get_sync:
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 485 pm_runtime_put(dev);
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 486 pm_runtime_disable(dev);
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 487
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 488 return ret;
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 489 }
f3e25911a430ed Kishon Vijay Abraham I 2020-07-22 490
---
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