sound/soc/fsl/p1022_rdk.c:191: warning: cannot understand function prototype: 'const struct snd_soc_ops p1022_rdk_ops = '

From: kernel test robot
Date: Tue Dec 12 2023 - 19:17:12 EST

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tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: cf52eed70e555e864120cfaf280e979e2a035c66
commit: 5ace37bd7947e28dec5559a57ddc6e1d997dbec5 ASoC: fsl: constify snd_soc_ops structures
date: 7 years ago
config: powerpc-randconfig-r002-20230712 (https://download.01.org/0day-ci/archive/20231213/202312130848.68KoHzAZ-lkp@xxxxxxxxx/config)
compiler: powerpc-linux-gcc (GCC) 11.3.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231213/202312130848.68KoHzAZ-lkp@xxxxxxxxx/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202312130848.68KoHzAZ-lkp@xxxxxxxxx/

All warnings (new ones prefixed by >>):

| ^~~~
sound/soc/fsl/p1022_rdk.c:62:9: note: in expansion of macro 'clrsetbits_be32'
62 | clrsetbits_be32(&guts->dmuxcr, 3 << shift, device << shift);
| ^~~~~~~~~~~~~~~
sound/soc/fsl/p1022_rdk.c:62:25: warning: taking address of packed member of 'struct ccsr_guts' may result in an unaligned pointer value [-Waddress-of-packed-member]
62 | clrsetbits_be32(&guts->dmuxcr, 3 << shift, device << shift);
arch/powerpc/include/asm/io.h:879:21: note: in definition of macro 'clrsetbits'
879 | out_##type((addr), (in_##type(addr) & ~(clear)) | (set))
| ^~~~
sound/soc/fsl/p1022_rdk.c:62:9: note: in expansion of macro 'clrsetbits_be32'
62 | clrsetbits_be32(&guts->dmuxcr, 3 << shift, device << shift);
| ^~~~~~~~~~~~~~~
sound/soc/fsl/p1022_rdk.c: In function 'p1022_rdk_machine_probe':
sound/soc/fsl/p1022_rdk.c:106:25: warning: taking address of packed member of 'struct ccsr_guts' may result in an unaligned pointer value [-Waddress-of-packed-member]
106 | clrsetbits_be32(&guts->pmuxcr, CCSR_GUTS_PMUXCR_UART0_I2C1_MASK,
| ^~~~~~~~~~~~~
arch/powerpc/include/asm/io.h:879:39: note: in definition of macro 'clrsetbits'
879 | out_##type((addr), (in_##type(addr) & ~(clear)) | (set))
| ^~~~
sound/soc/fsl/p1022_rdk.c:106:9: note: in expansion of macro 'clrsetbits_be32'
106 | clrsetbits_be32(&guts->pmuxcr, CCSR_GUTS_PMUXCR_UART0_I2C1_MASK,
| ^~~~~~~~~~~~~~~
sound/soc/fsl/p1022_rdk.c:106:25: warning: taking address of packed member of 'struct ccsr_guts' may result in an unaligned pointer value [-Waddress-of-packed-member]
106 | clrsetbits_be32(&guts->pmuxcr, CCSR_GUTS_PMUXCR_UART0_I2C1_MASK,
arch/powerpc/include/asm/io.h:879:21: note: in definition of macro 'clrsetbits'
879 | out_##type((addr), (in_##type(addr) & ~(clear)) | (set))
| ^~~~
sound/soc/fsl/p1022_rdk.c:106:9: note: in expansion of macro 'clrsetbits_be32'
106 | clrsetbits_be32(&guts->pmuxcr, CCSR_GUTS_PMUXCR_UART0_I2C1_MASK,
| ^~~~~~~~~~~~~~~
sound/soc/fsl/p1022_rdk.c:110:25: warning: taking address of packed member of 'struct ccsr_guts' may result in an unaligned pointer value [-Waddress-of-packed-member]
110 | clrsetbits_be32(&guts->pmuxcr, CCSR_GUTS_PMUXCR_SSI_DMA_TDM_MASK,
| ^~~~~~~~~~~~~
arch/powerpc/include/asm/io.h:879:39: note: in definition of macro 'clrsetbits'
879 | out_##type((addr), (in_##type(addr) & ~(clear)) | (set))
| ^~~~
sound/soc/fsl/p1022_rdk.c:110:9: note: in expansion of macro 'clrsetbits_be32'
110 | clrsetbits_be32(&guts->pmuxcr, CCSR_GUTS_PMUXCR_SSI_DMA_TDM_MASK,
| ^~~~~~~~~~~~~~~
sound/soc/fsl/p1022_rdk.c:110:25: warning: taking address of packed member of 'struct ccsr_guts' may result in an unaligned pointer value [-Waddress-of-packed-member]
110 | clrsetbits_be32(&guts->pmuxcr, CCSR_GUTS_PMUXCR_SSI_DMA_TDM_MASK,
arch/powerpc/include/asm/io.h:879:21: note: in definition of macro 'clrsetbits'
879 | out_##type((addr), (in_##type(addr) & ~(clear)) | (set))
| ^~~~
sound/soc/fsl/p1022_rdk.c:110:9: note: in expansion of macro 'clrsetbits_be32'
110 | clrsetbits_be32(&guts->pmuxcr, CCSR_GUTS_PMUXCR_SSI_DMA_TDM_MASK,
| ^~~~~~~~~~~~~~~
sound/soc/fsl/p1022_rdk.c: In function 'p1022_rdk_machine_remove':
sound/soc/fsl/p1022_rdk.c:178:19: warning: taking address of packed member of 'struct ccsr_guts' may result in an unaligned pointer value [-Waddress-of-packed-member]
178 | clrbits32(&guts->pmuxcr, CCSR_GUTS_PMUXCR_UART0_I2C1_MASK);
| ^~~~~~~~~~~~~
arch/powerpc/include/asm/io.h:863:56: note: in definition of macro 'clrbits32'
863 | #define clrbits32(_addr, _v) out_be32((_addr), in_be32(_addr) & ~(_v))
| ^~~~~
sound/soc/fsl/p1022_rdk.c:178:19: warning: taking address of packed member of 'struct ccsr_guts' may result in an unaligned pointer value [-Waddress-of-packed-member]
178 | clrbits32(&guts->pmuxcr, CCSR_GUTS_PMUXCR_UART0_I2C1_MASK);
arch/powerpc/include/asm/io.h:863:40: note: in definition of macro 'clrbits32'
863 | #define clrbits32(_addr, _v) out_be32((_addr), in_be32(_addr) & ~(_v))
| ^~~~~
sound/soc/fsl/p1022_rdk.c:179:19: warning: taking address of packed member of 'struct ccsr_guts' may result in an unaligned pointer value [-Waddress-of-packed-member]
179 | clrbits32(&guts->pmuxcr, CCSR_GUTS_PMUXCR_SSI_DMA_TDM_MASK);
| ^~~~~~~~~~~~~
arch/powerpc/include/asm/io.h:863:56: note: in definition of macro 'clrbits32'
863 | #define clrbits32(_addr, _v) out_be32((_addr), in_be32(_addr) & ~(_v))
| ^~~~~
sound/soc/fsl/p1022_rdk.c:179:19: warning: taking address of packed member of 'struct ccsr_guts' may result in an unaligned pointer value [-Waddress-of-packed-member]
179 | clrbits32(&guts->pmuxcr, CCSR_GUTS_PMUXCR_SSI_DMA_TDM_MASK);
arch/powerpc/include/asm/io.h:863:40: note: in definition of macro 'clrbits32'
863 | #define clrbits32(_addr, _v) out_be32((_addr), in_be32(_addr) & ~(_v))
| ^~~~~
In file included from sound/soc/fsl/p1022_rdk.c:20:
sound/soc/fsl/p1022_rdk.c: At top level:
include/linux/module.h:131:13: warning: 'init_module' specifies less restrictive attribute than its target 'p1022_rdk_init': 'cold' [-Wmissing-attributes]
131 | int init_module(void) __attribute__((alias(#initfn)));
| ^~~~~~~~~~~
include/linux/module.h:121:41: note: in expansion of macro 'module_init'
121 | #define late_initcall(fn) module_init(fn)
| ^~~~~~~~~~~
sound/soc/fsl/p1022_rdk.c:386:1: note: in expansion of macro 'late_initcall'
386 | late_initcall(p1022_rdk_init);
| ^~~~~~~~~~~~~
sound/soc/fsl/p1022_rdk.c:358:19: note: 'init_module' target declared here
358 | static int __init p1022_rdk_init(void)
| ^~~~~~~~~~~~~~
In file included from sound/soc/fsl/p1022_rdk.c:20:
include/linux/module.h:137:14: warning: 'cleanup_module' specifies less restrictive attribute than its target 'p1022_rdk_exit': 'cold' [-Wmissing-attributes]
137 | void cleanup_module(void) __attribute__((alias(#exitfn)));
| ^~~~~~~~~~~~~~
sound/soc/fsl/p1022_rdk.c:387:1: note: in expansion of macro 'module_exit'
387 | module_exit(p1022_rdk_exit);
| ^~~~~~~~~~~
sound/soc/fsl/p1022_rdk.c:381:20: note: 'cleanup_module' target declared here
381 | static void __exit p1022_rdk_exit(void)
| ^~~~~~~~~~~~~~
sound/soc/fsl/p1022_rdk.c:2: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
* Freescale P1022RDK ALSA SoC Machine driver
sound/soc/fsl/p1022_rdk.c:74: warning: cannot understand function prototype: 'struct machine_data '
sound/soc/fsl/p1022_rdk.c:94: warning: Function parameter or member 'card' not described in 'p1022_rdk_machine_probe'
sound/soc/fsl/p1022_rdk.c:133: warning: Function parameter or member 'substream' not described in 'p1022_rdk_startup'
sound/soc/fsl/p1022_rdk.c:166: warning: Function parameter or member 'card' not described in 'p1022_rdk_machine_remove'
>> sound/soc/fsl/p1022_rdk.c:191: warning: cannot understand function prototype: 'const struct snd_soc_ops p1022_rdk_ops = '
sound/soc/fsl/p1022_rdk.c:203: warning: Function parameter or member 'pdev' not described in 'p1022_rdk_probe'
sound/soc/fsl/p1022_rdk.c:330: warning: Function parameter or member 'pdev' not described in 'p1022_rdk_remove'

vim +191 sound/soc/fsl/p1022_rdk.c

187
188 /**
189 * p1022_rdk_ops: ASoC machine driver operations
190 */
> 191 static const struct snd_soc_ops p1022_rdk_ops = {
192 .startup = p1022_rdk_startup,
193 };
194
195 /**
196 * p1022_rdk_probe: platform probe function for the machine driver
197 *
198 * Although this is a machine driver, the SSI node is the "master" node with
199 * respect to audio hardware connections. Therefore, we create a new ASoC
200 * device for each new SSI node that has a codec attached.
201 */
202 static int p1022_rdk_probe(struct platform_device *pdev)
203 {
204 struct device *dev = pdev->dev.parent;
205 /* ssi_pdev is the platform device for the SSI node that probed us */
206 struct platform_device *ssi_pdev = to_platform_device(dev);
207 struct device_node *np = ssi_pdev->dev.of_node;
208 struct device_node *codec_np = NULL;
209 struct machine_data *mdata;
210 const u32 *iprop;
211 int ret;
212
213 /* Find the codec node for this SSI. */
214 codec_np = of_parse_phandle(np, "codec-handle", 0);
215 if (!codec_np) {
216 dev_err(dev, "could not find codec node\n");
217 return -EINVAL;
218 }
219
220 mdata = kzalloc(sizeof(struct machine_data), GFP_KERNEL);
221 if (!mdata) {
222 ret = -ENOMEM;
223 goto error_put;
224 }
225
226 mdata->dai[0].cpu_dai_name = dev_name(&ssi_pdev->dev);
227 mdata->dai[0].ops = &p1022_rdk_ops;
228
229 /* ASoC core can match codec with device node */
230 mdata->dai[0].codec_of_node = codec_np;
231
232 /*
233 * We register two DAIs per SSI, one for playback and the other for
234 * capture. We support codecs that have separate DAIs for both playback
235 * and capture.
236 */
237 memcpy(&mdata->dai[1], &mdata->dai[0], sizeof(struct snd_soc_dai_link));
238
239 /* The DAI names from the codec (snd_soc_dai_driver.name) */
240 mdata->dai[0].codec_dai_name = "wm8960-hifi";
241 mdata->dai[1].codec_dai_name = mdata->dai[0].codec_dai_name;
242
243 /*
244 * Configure the SSI for I2S slave mode. Older device trees have
245 * an fsl,mode property, but we ignore that since there's really
246 * only one way to configure the SSI.
247 */
248 mdata->dai_format = SND_SOC_DAIFMT_NB_NF |
249 SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBM_CFM;
250 mdata->codec_clk_direction = SND_SOC_CLOCK_OUT;
251 mdata->cpu_clk_direction = SND_SOC_CLOCK_IN;
252
253 /*
254 * In i2s-slave mode, the codec has its own clock source, so we
255 * need to get the frequency from the device tree and pass it to
256 * the codec driver.
257 */
258 iprop = of_get_property(codec_np, "clock-frequency", NULL);
259 if (!iprop || !*iprop) {
260 dev_err(&pdev->dev, "codec bus-frequency property is missing or invalid\n");
261 ret = -EINVAL;
262 goto error;
263 }
264 mdata->clk_frequency = be32_to_cpup(iprop);
265
266 if (!mdata->clk_frequency) {
267 dev_err(&pdev->dev, "unknown clock frequency\n");
268 ret = -EINVAL;
269 goto error;
270 }
271
272 /* Find the playback DMA channel to use. */
273 mdata->dai[0].platform_name = mdata->platform_name[0];
274 ret = fsl_asoc_get_dma_channel(np, "fsl,playback-dma", &mdata->dai[0],
275 &mdata->dma_channel_id[0],
276 &mdata->dma_id[0]);
277 if (ret) {
278 dev_err(&pdev->dev, "missing/invalid playback DMA phandle (ret=%i)\n",
279 ret);
280 goto error;
281 }
282
283 /* Find the capture DMA channel to use. */
284 mdata->dai[1].platform_name = mdata->platform_name[1];
285 ret = fsl_asoc_get_dma_channel(np, "fsl,capture-dma", &mdata->dai[1],
286 &mdata->dma_channel_id[1],
287 &mdata->dma_id[1]);
288 if (ret) {
289 dev_err(&pdev->dev, "missing/invalid capture DMA phandle (ret=%i)\n",
290 ret);
291 goto error;
292 }
293
294 /* Initialize our DAI data structure. */
295 mdata->dai[0].stream_name = "playback";
296 mdata->dai[1].stream_name = "capture";
297 mdata->dai[0].name = mdata->dai[0].stream_name;
298 mdata->dai[1].name = mdata->dai[1].stream_name;
299
300 mdata->card.probe = p1022_rdk_machine_probe;
301 mdata->card.remove = p1022_rdk_machine_remove;
302 mdata->card.name = pdev->name; /* The platform driver name */
303 mdata->card.owner = THIS_MODULE;
304 mdata->card.dev = &pdev->dev;
305 mdata->card.num_links = 2;
306 mdata->card.dai_link = mdata->dai;
307
308 /* Register with ASoC */
309 ret = snd_soc_register_card(&mdata->card);
310 if (ret) {
311 dev_err(&pdev->dev, "could not register card (ret=%i)\n", ret);
312 goto error;
313 }
314
315 return 0;
316
317 error:
318 kfree(mdata);
319 error_put:
320 of_node_put(codec_np);
321 return ret;
322 }
323
324 /**
325 * p1022_rdk_remove: remove the platform device
326 *
327 * This function is called when the platform device is removed.
328 */
329 static int p1022_rdk_remove(struct platform_device *pdev)
330 {
331 struct snd_soc_card *card = platform_get_drvdata(pdev);
332 struct machine_data *mdata =
333 container_of(card, struct machine_data, card);
334
335 snd_soc_unregister_card(card);
336 kfree(mdata);
337
338 return 0;
339 }
340
341 static struct platform_driver p1022_rdk_driver = {
342 .probe = p1022_rdk_probe,
343 .remove = p1022_rdk_remove,
344 .driver = {
345 /*
346 * The name must match 'compatible' property in the device tree,
347 * in lowercase letters.
348 */
349 .name = "snd-soc-p1022rdk",
350 },
351 };
352
353 /**
354 * p1022_rdk_init: machine driver initialization.
355 *
356 * This function is called when this module is loaded.
357 */
358 static int __init p1022_rdk_init(void)
359 {
360 struct device_node *guts_np;
361 struct resource res;
362
363 /* Get the physical address of the global utilities registers */
364 guts_np = of_find_compatible_node(NULL, NULL, "fsl,p1022-guts");
365 if (of_address_to_resource(guts_np, 0, &res)) {
366 pr_err("snd-soc-p1022rdk: missing/invalid global utils node\n");
367 of_node_put(guts_np);
368 return -EINVAL;
369 }
370 guts_phys = res.start;
371 of_node_put(guts_np);
372
373 return platform_driver_register(&p1022_rdk_driver);
374 }
375
376 /**
377 * p1022_rdk_exit: machine driver exit
378 *
379 * This function is called when this driver is unloaded.
380 */
> 381 static void __exit p1022_rdk_exit(void)
382 {
383 platform_driver_unregister(&p1022_rdk_driver);
384 }
385

--
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