[PATCH] rtc: at91sma9: Simplify using devm_clk_get_enabled()
kernel test robot
lkp at intel.com
Thu Mar 25 01:11:49 GMT 2021
Hi "Uwe,
I love your patch! Perhaps something to improve:
[auto build test WARNING on abelloni/rtc-next]
[also build test WARNING on v5.12-rc4 next-20210324]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]
url: https://github.com/0day-ci/linux/commits/Uwe-Kleine-K-nig/rtc-at91sma9-Simplify-using-devm_clk_get_enabled/20210325-042956
base: https://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux.git rtc-next
config: arc-allyesconfig (attached as .config)
compiler: arceb-elf-gcc (GCC) 9.3.0
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
# https://github.com/0day-ci/linux/commit/782e62ed210e25e760c5607b2ac2dbf16f56ea0f
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Uwe-Kleine-K-nig/rtc-at91sma9-Simplify-using-devm_clk_get_enabled/20210325-042956
git checkout 782e62ed210e25e760c5607b2ac2dbf16f56ea0f
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arc
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp at intel.com>
All warnings (new ones prefixed by >>):
drivers/rtc/rtc-at91sam9.c: In function 'at91_rtc_probe':
drivers/rtc/rtc-at91sam9.c:377:14: error: implicit declaration of function 'devm_clk_get_enabled'; did you mean 'memcg_kmem_enabled'? [-Werror=implicit-function-declaration]
377 | rtc->sclk = devm_clk_get_enabled(&pdev->dev, NULL);
| ^~~~~~~~~~~~~~~~~~~~
| memcg_kmem_enabled
>> drivers/rtc/rtc-at91sam9.c:377:12: warning: assignment to 'struct clk *' from 'int' makes pointer from integer without a cast [-Wint-conversion]
377 | rtc->sclk = devm_clk_get_enabled(&pdev->dev, NULL);
| ^
cc1: some warnings being treated as errors
vim +377 drivers/rtc/rtc-at91sam9.c
331
332 /*
333 * Initialize and install RTC driver
334 */
335 static int at91_rtc_probe(struct platform_device *pdev)
336 {
337 struct sam9_rtc *rtc;
338 int ret, irq;
339 u32 mr;
340 unsigned int sclk_rate;
341 struct of_phandle_args args;
342
343 irq = platform_get_irq(pdev, 0);
344 if (irq < 0)
345 return irq;
346
347 rtc = devm_kzalloc(&pdev->dev, sizeof(*rtc), GFP_KERNEL);
348 if (!rtc)
349 return -ENOMEM;
350
351 spin_lock_init(&rtc->lock);
352 rtc->irq = irq;
353
354 /* platform setup code should have handled this; sigh */
355 if (!device_can_wakeup(&pdev->dev))
356 device_init_wakeup(&pdev->dev, 1);
357
358 platform_set_drvdata(pdev, rtc);
359
360 rtc->rtt = devm_platform_ioremap_resource(pdev, 0);
361 if (IS_ERR(rtc->rtt))
362 return PTR_ERR(rtc->rtt);
363
364 ret = of_parse_phandle_with_fixed_args(pdev->dev.of_node,
365 "atmel,rtt-rtc-time-reg", 1, 0,
366 &args);
367 if (ret)
368 return ret;
369
370 rtc->gpbr = syscon_node_to_regmap(args.np);
371 rtc->gpbr_offset = args.args[0];
372 if (IS_ERR(rtc->gpbr)) {
373 dev_err(&pdev->dev, "failed to retrieve gpbr regmap, aborting.\n");
374 return -ENOMEM;
375 }
376
> 377 rtc->sclk = devm_clk_get_enabled(&pdev->dev, NULL);
378 if (IS_ERR(rtc->sclk))
379 return PTR_ERR(rtc->sclk);
380
381 sclk_rate = clk_get_rate(rtc->sclk);
382 if (!sclk_rate || sclk_rate > AT91_RTT_RTPRES) {
383 dev_err(&pdev->dev, "Invalid slow clock rate\n");
384 return -EINVAL;
385 }
386
387 mr = rtt_readl(rtc, MR);
388
389 /* unless RTT is counting at 1 Hz, re-initialize it */
390 if ((mr & AT91_RTT_RTPRES) != sclk_rate) {
391 mr = AT91_RTT_RTTRST | (sclk_rate & AT91_RTT_RTPRES);
392 gpbr_writel(rtc, 0);
393 }
394
395 /* disable all interrupts (same as on shutdown path) */
396 mr &= ~(AT91_RTT_ALMIEN | AT91_RTT_RTTINCIEN);
397 rtt_writel(rtc, MR, mr);
398
399 rtc->rtcdev = devm_rtc_allocate_device(&pdev->dev);
400 if (IS_ERR(rtc->rtcdev)) {
401 ret = PTR_ERR(rtc->rtcdev);
402 return ret;
403 }
404
405 rtc->rtcdev->ops = &at91_rtc_ops;
406 rtc->rtcdev->range_max = U32_MAX;
407
408 /* register irq handler after we know what name we'll use */
409 ret = devm_request_irq(&pdev->dev, rtc->irq, at91_rtc_interrupt,
410 IRQF_SHARED | IRQF_COND_SUSPEND,
411 dev_name(&rtc->rtcdev->dev), rtc);
412 if (ret) {
413 dev_dbg(&pdev->dev, "can't share IRQ %d?\n", rtc->irq);
414 return ret;
415 }
416
417 /* NOTE: sam9260 rev A silicon has a ROM bug which resets the
418 * RTT on at least some reboots. If you have that chip, you must
419 * initialize the time from some external source like a GPS, wall
420 * clock, discrete RTC, etc
421 */
422
423 if (gpbr_readl(rtc) == 0)
424 dev_warn(&pdev->dev, "%s: SET TIME!\n",
425 dev_name(&rtc->rtcdev->dev));
426
427 return devm_rtc_register_device(rtc->rtcdev);
428 }
429
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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