drivers/rtc/rtc-mxc.c:315:19: warning: cast to smaller integer type 'enum imx_rtc_type' from 'const void *'

From: kernel test robot
Date: Sun Nov 07 2021 - 04:00:30 EST

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Hi Alexandre,

First bad commit (maybe != root cause):

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: b5013d084e03e82ceeab4db8ae8ceeaebe76b0eb
commit: 0020868f2a7037e87d6b3b196526de2fb885830d rtc: mxc{,_v2}: enable COMPILE_TEST
date: 11 months ago
config: arm64-randconfig-r005-20210928 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project dc6e8dfdfe7efecfda318d43a06fae18b40eb498)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# install arm64 cross compiling tool for clang build
# apt-get install binutils-aarch64-linux-gnu
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0020868f2a7037e87d6b3b196526de2fb885830d
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 0020868f2a7037e87d6b3b196526de2fb885830d
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=arm64

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>

All warnings (new ones prefixed by >>):

>> drivers/rtc/rtc-mxc.c:315:19: warning: cast to smaller integer type 'enum imx_rtc_type' from 'const void *' [-Wvoid-pointer-to-enum-cast]
pdata->devtype = (enum imx_rtc_type)of_device_get_match_data(&pdev->dev);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 warning generated.

vim +315 drivers/rtc/rtc-mxc.c

fdc9f0eace99b2 Anson Huang 2020-03-16 302
5a167f4543e45d Greg Kroah-Hartman 2012-12-21 303 static int mxc_rtc_probe(struct platform_device *pdev)
d00ed3cf6e5431 Daniel Mack 2009-09-22 304 {
d00ed3cf6e5431 Daniel Mack 2009-09-22 305 struct rtc_device *rtc;
d00ed3cf6e5431 Daniel Mack 2009-09-22 306 struct rtc_plat_data *pdata = NULL;
d00ed3cf6e5431 Daniel Mack 2009-09-22 307 u32 reg;
c783a29efcbc90 Vladimir Zapolskiy 2010-04-06 308 unsigned long rate;
c783a29efcbc90 Vladimir Zapolskiy 2010-04-06 309 int ret;
d00ed3cf6e5431 Daniel Mack 2009-09-22 310
c783a29efcbc90 Vladimir Zapolskiy 2010-04-06 311 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
d00ed3cf6e5431 Daniel Mack 2009-09-22 312 if (!pdata)
d00ed3cf6e5431 Daniel Mack 2009-09-22 313 return -ENOMEM;
d00ed3cf6e5431 Daniel Mack 2009-09-22 314
ba7aa63000f26c Alexandre Belloni 2020-11-17 @315 pdata->devtype = (enum imx_rtc_type)of_device_get_match_data(&pdev->dev);
bb1d34a20d537e Shawn Guo 2012-09-15 316
cf37fa79a76170 Anson Huang 2019-04-01 317 pdata->ioaddr = devm_platform_ioremap_resource(pdev, 0);
7c1d69ee11b898 Julia Lawall 2013-09-11 318 if (IS_ERR(pdata->ioaddr))
7c1d69ee11b898 Julia Lawall 2013-09-11 319 return PTR_ERR(pdata->ioaddr);
d00ed3cf6e5431 Daniel Mack 2009-09-22 320
ebc2ec4ecf1893 Alexandre Belloni 2019-04-16 321 rtc = devm_rtc_allocate_device(&pdev->dev);
ebc2ec4ecf1893 Alexandre Belloni 2019-04-16 322 if (IS_ERR(rtc))
ebc2ec4ecf1893 Alexandre Belloni 2019-04-16 323 return PTR_ERR(rtc);
ebc2ec4ecf1893 Alexandre Belloni 2019-04-16 324
ebc2ec4ecf1893 Alexandre Belloni 2019-04-16 325 pdata->rtc = rtc;
ebc2ec4ecf1893 Alexandre Belloni 2019-04-16 326 rtc->ops = &mxc_rtc_ops;
83888df4b882d1 Alexandre Belloni 2019-04-16 327 if (is_imx1_rtc(pdata)) {
83888df4b882d1 Alexandre Belloni 2019-04-16 328 struct rtc_time tm;
83888df4b882d1 Alexandre Belloni 2019-04-16 329
83888df4b882d1 Alexandre Belloni 2019-04-16 330 /* 9bit days + hours minutes seconds */
83888df4b882d1 Alexandre Belloni 2019-04-16 331 rtc->range_max = (1 << 9) * 86400 - 1;
83888df4b882d1 Alexandre Belloni 2019-04-16 332
83888df4b882d1 Alexandre Belloni 2019-04-16 333 /*
83888df4b882d1 Alexandre Belloni 2019-04-16 334 * Set the start date as beginning of the current year. This can
83888df4b882d1 Alexandre Belloni 2019-04-16 335 * be overridden using device tree.
83888df4b882d1 Alexandre Belloni 2019-04-16 336 */
83888df4b882d1 Alexandre Belloni 2019-04-16 337 rtc_time64_to_tm(ktime_get_real_seconds(), &tm);
83888df4b882d1 Alexandre Belloni 2019-04-16 338 rtc->start_secs = mktime64(tm.tm_year, 1, 1, 0, 0, 0);
83888df4b882d1 Alexandre Belloni 2019-04-16 339 rtc->set_start_time = true;
83888df4b882d1 Alexandre Belloni 2019-04-16 340 } else {
83888df4b882d1 Alexandre Belloni 2019-04-16 341 /* 16bit days + hours minutes seconds */
83888df4b882d1 Alexandre Belloni 2019-04-16 342 rtc->range_max = (1 << 16) * 86400ULL - 1;
83888df4b882d1 Alexandre Belloni 2019-04-16 343 }
ebc2ec4ecf1893 Alexandre Belloni 2019-04-16 344
8f5fe77828e16e Philippe Reynes 2015-07-26 345 pdata->clk_ipg = devm_clk_get(&pdev->dev, "ipg");
8f5fe77828e16e Philippe Reynes 2015-07-26 346 if (IS_ERR(pdata->clk_ipg)) {
8f5fe77828e16e Philippe Reynes 2015-07-26 347 dev_err(&pdev->dev, "unable to get ipg clock!\n");
8f5fe77828e16e Philippe Reynes 2015-07-26 348 return PTR_ERR(pdata->clk_ipg);
49908e739e23e2 Alexander Beregalov 2010-03-05 349 }
d00ed3cf6e5431 Daniel Mack 2009-09-22 350
8f5fe77828e16e Philippe Reynes 2015-07-26 351 ret = clk_prepare_enable(pdata->clk_ipg);
1b3d2243d049e0 Fabio Estevam 2014-01-23 352 if (ret)
1b3d2243d049e0 Fabio Estevam 2014-01-23 353 return ret;
1b3d2243d049e0 Fabio Estevam 2014-01-23 354
8f5fe77828e16e Philippe Reynes 2015-07-26 355 pdata->clk_ref = devm_clk_get(&pdev->dev, "ref");
8f5fe77828e16e Philippe Reynes 2015-07-26 356 if (IS_ERR(pdata->clk_ref)) {
fdc9f0eace99b2 Anson Huang 2020-03-16 357 clk_disable_unprepare(pdata->clk_ipg);
8f5fe77828e16e Philippe Reynes 2015-07-26 358 dev_err(&pdev->dev, "unable to get ref clock!\n");
fdc9f0eace99b2 Anson Huang 2020-03-16 359 return PTR_ERR(pdata->clk_ref);
8f5fe77828e16e Philippe Reynes 2015-07-26 360 }
8f5fe77828e16e Philippe Reynes 2015-07-26 361
8f5fe77828e16e Philippe Reynes 2015-07-26 362 ret = clk_prepare_enable(pdata->clk_ref);
fdc9f0eace99b2 Anson Huang 2020-03-16 363 if (ret) {
fdc9f0eace99b2 Anson Huang 2020-03-16 364 clk_disable_unprepare(pdata->clk_ipg);
fdc9f0eace99b2 Anson Huang 2020-03-16 365 return ret;
fdc9f0eace99b2 Anson Huang 2020-03-16 366 }
fdc9f0eace99b2 Anson Huang 2020-03-16 367
fdc9f0eace99b2 Anson Huang 2020-03-16 368 ret = devm_add_action_or_reset(&pdev->dev, mxc_rtc_action, pdata);
8f5fe77828e16e Philippe Reynes 2015-07-26 369 if (ret)
fdc9f0eace99b2 Anson Huang 2020-03-16 370 return ret;
8f5fe77828e16e Philippe Reynes 2015-07-26 371
8f5fe77828e16e Philippe Reynes 2015-07-26 372 rate = clk_get_rate(pdata->clk_ref);
d00ed3cf6e5431 Daniel Mack 2009-09-22 373
d00ed3cf6e5431 Daniel Mack 2009-09-22 374 if (rate == 32768)
d00ed3cf6e5431 Daniel Mack 2009-09-22 375 reg = RTC_INPUT_CLK_32768HZ;
d00ed3cf6e5431 Daniel Mack 2009-09-22 376 else if (rate == 32000)
d00ed3cf6e5431 Daniel Mack 2009-09-22 377 reg = RTC_INPUT_CLK_32000HZ;
d00ed3cf6e5431 Daniel Mack 2009-09-22 378 else if (rate == 38400)
d00ed3cf6e5431 Daniel Mack 2009-09-22 379 reg = RTC_INPUT_CLK_38400HZ;
d00ed3cf6e5431 Daniel Mack 2009-09-22 380 else {
c783a29efcbc90 Vladimir Zapolskiy 2010-04-06 381 dev_err(&pdev->dev, "rtc clock is not valid (%lu)\n", rate);
fdc9f0eace99b2 Anson Huang 2020-03-16 382 return -EINVAL;
d00ed3cf6e5431 Daniel Mack 2009-09-22 383 }
d00ed3cf6e5431 Daniel Mack 2009-09-22 384
d00ed3cf6e5431 Daniel Mack 2009-09-22 385 reg |= RTC_ENABLE_BIT;
d00ed3cf6e5431 Daniel Mack 2009-09-22 386 writew(reg, (pdata->ioaddr + RTC_RTCCTL));
d00ed3cf6e5431 Daniel Mack 2009-09-22 387 if (((readw(pdata->ioaddr + RTC_RTCCTL)) & RTC_ENABLE_BIT) == 0) {
d00ed3cf6e5431 Daniel Mack 2009-09-22 388 dev_err(&pdev->dev, "hardware module can't be enabled!\n");
fdc9f0eace99b2 Anson Huang 2020-03-16 389 return -EIO;
d00ed3cf6e5431 Daniel Mack 2009-09-22 390 }
d00ed3cf6e5431 Daniel Mack 2009-09-22 391
d00ed3cf6e5431 Daniel Mack 2009-09-22 392 platform_set_drvdata(pdev, pdata);
d00ed3cf6e5431 Daniel Mack 2009-09-22 393
d00ed3cf6e5431 Daniel Mack 2009-09-22 394 /* Configure and enable the RTC */
d00ed3cf6e5431 Daniel Mack 2009-09-22 395 pdata->irq = platform_get_irq(pdev, 0);
d00ed3cf6e5431 Daniel Mack 2009-09-22 396
d00ed3cf6e5431 Daniel Mack 2009-09-22 397 if (pdata->irq >= 0 &&
c783a29efcbc90 Vladimir Zapolskiy 2010-04-06 398 devm_request_irq(&pdev->dev, pdata->irq, mxc_rtc_interrupt,
c783a29efcbc90 Vladimir Zapolskiy 2010-04-06 399 IRQF_SHARED, pdev->name, pdev) < 0) {
d00ed3cf6e5431 Daniel Mack 2009-09-22 400 dev_warn(&pdev->dev, "interrupt not available.\n");
d00ed3cf6e5431 Daniel Mack 2009-09-22 401 pdata->irq = -1;
d00ed3cf6e5431 Daniel Mack 2009-09-22 402 }
d00ed3cf6e5431 Daniel Mack 2009-09-22 403
bc0e731fc2893f Anson Huang 2019-04-11 404 if (pdata->irq >= 0) {
c92182ee0b5a33 Yauhen Kharuzhy 2012-01-10 405 device_init_wakeup(&pdev->dev, 1);
bc0e731fc2893f Anson Huang 2019-04-11 406 ret = dev_pm_set_wake_irq(&pdev->dev, pdata->irq);
bc0e731fc2893f Anson Huang 2019-04-11 407 if (ret)
bc0e731fc2893f Anson Huang 2019-04-11 408 dev_err(&pdev->dev, "failed to enable irq wake\n");
bc0e731fc2893f Anson Huang 2019-04-11 409 }
c92182ee0b5a33 Yauhen Kharuzhy 2012-01-10 410
fdcfd854333be5 Bartosz Golaszewski 2020-11-09 411 ret = devm_rtc_register_device(rtc);
d00ed3cf6e5431 Daniel Mack 2009-09-22 412
d00ed3cf6e5431 Daniel Mack 2009-09-22 413 return ret;
d00ed3cf6e5431 Daniel Mack 2009-09-22 414 }
d00ed3cf6e5431 Daniel Mack 2009-09-22 415

:::::: The code at line 315 was first introduced by commit
:::::: ba7aa63000f26c5a2c87d5a716601499a02a3156 rtc: mxc: use of_device_get_match_data

:::::: TO: Alexandre Belloni <alexandre.belloni@xxxxxxxxxxx>
:::::: CC: Alexandre Belloni <alexandre.belloni@xxxxxxxxxxx>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx

Attachment: .config.gz
Description: application/gzip

Next message: Baolin Wang: "[PATCH 2/3] mm: migrate: Correct the hugetlb migration stats"
Previous message: Baolin Wang: "[PATCH 1/3] mm: migrate: Fix the return value of migrate_pages()"
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