Re: [PATCH v1 1/2] spi: spi-cadence: Add optional reset control support

[kernel test robot <lkp@xxxxxxxxx>]

Hi Ji,

kernel test robot noticed the following build errors:

[auto build test ERROR on broonie-spi/for-next]
[also build test ERROR on robh/for-next krzk-dt/for-next linus/master v6.9-rc5 next-20240424]
[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#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Ji-Sheng-Teoh/spi-spi-cadence-Add-optional-reset-control-support/20240424-131551
base:   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git for-next
patch link:    https://lore.kernel.org/r/20240424051317.2084059-2-jisheng.teoh%40starfivetech.com
patch subject: [PATCH v1 1/2] spi: spi-cadence: Add optional reset control support
config: nios2-randconfig-r081-20240424 (https://download.01.org/0day-ci/archive/20240425/202404250029.8cjM4mtZ-lkp@xxxxxxxxx/config)
compiler: nios2-linux-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240425/202404250029.8cjM4mtZ-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/202404250029.8cjM4mtZ-lkp@xxxxxxxxx/

All error/warnings (new ones prefixed by >>):

   drivers/spi/spi-cadence.c: In function 'cdns_spi_probe':
>> drivers/spi/spi-cadence.c:593:22: error: implicit declaration of function 'devm_reset_control_get_optional_exclusive' [-Werror=implicit-function-declaration]
     593 |         xspi->rstc = devm_reset_control_get_optional_exclusive(&pdev->dev, NULL);
         |                      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/spi/spi-cadence.c:593:20: warning: assignment to 'struct reset_control *' from 'int' makes pointer from integer without a cast [-Wint-conversion]
     593 |         xspi->rstc = devm_reset_control_get_optional_exclusive(&pdev->dev, NULL);
         |                    ^
>> drivers/spi/spi-cadence.c:600:9: error: implicit declaration of function 'reset_control_assert' [-Werror=implicit-function-declaration]
     600 |         reset_control_assert(xspi->rstc);
         |         ^~~~~~~~~~~~~~~~~~~~
>> drivers/spi/spi-cadence.c:601:9: error: implicit declaration of function 'reset_control_deassert' [-Werror=implicit-function-declaration]
     601 |         reset_control_deassert(xspi->rstc);
         |         ^~~~~~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors


vim +/devm_reset_control_get_optional_exclusive +593 drivers/spi/spi-cadence.c

   550	
   551	/**
   552	 * cdns_spi_probe - Probe method for the SPI driver
   553	 * @pdev:	Pointer to the platform_device structure
   554	 *
   555	 * This function initializes the driver data structures and the hardware.
   556	 *
   557	 * Return:	0 on success and error value on error
   558	 */
   559	static int cdns_spi_probe(struct platform_device *pdev)
   560	{
   561		int ret = 0, irq;
   562		struct spi_controller *ctlr;
   563		struct cdns_spi *xspi;
   564		u32 num_cs;
   565		bool target;
   566	
   567		target = of_property_read_bool(pdev->dev.of_node, "spi-slave");
   568		if (target)
   569			ctlr = spi_alloc_target(&pdev->dev, sizeof(*xspi));
   570		else
   571			ctlr = spi_alloc_host(&pdev->dev, sizeof(*xspi));
   572	
   573		if (!ctlr)
   574			return -ENOMEM;
   575	
   576		xspi = spi_controller_get_devdata(ctlr);
   577		ctlr->dev.of_node = pdev->dev.of_node;
   578		platform_set_drvdata(pdev, ctlr);
   579	
   580		xspi->regs = devm_platform_ioremap_resource(pdev, 0);
   581		if (IS_ERR(xspi->regs)) {
   582			ret = PTR_ERR(xspi->regs);
   583			goto remove_ctlr;
   584		}
   585	
   586		xspi->pclk = devm_clk_get_enabled(&pdev->dev, "pclk");
   587		if (IS_ERR(xspi->pclk)) {
   588			dev_err(&pdev->dev, "pclk clock not found.\n");
   589			ret = PTR_ERR(xspi->pclk);
   590			goto remove_ctlr;
   591		}
   592	
 > 593		xspi->rstc = devm_reset_control_get_optional_exclusive(&pdev->dev, NULL);
   594		if (IS_ERR(xspi->rstc)) {
   595			ret = PTR_ERR(xspi->rstc);
   596			dev_err(&pdev->dev, "Cannot get SPI reset.\n");
   597			goto remove_ctlr;
   598		}
   599	
 > 600		reset_control_assert(xspi->rstc);
 > 601		reset_control_deassert(xspi->rstc);
   602	
   603		if (!spi_controller_is_target(ctlr)) {
   604			xspi->ref_clk = devm_clk_get_enabled(&pdev->dev, "ref_clk");
   605			if (IS_ERR(xspi->ref_clk)) {
   606				dev_err(&pdev->dev, "ref_clk clock not found.\n");
   607				ret = PTR_ERR(xspi->ref_clk);
   608				goto remove_ctlr;
   609			}
   610	
   611			pm_runtime_use_autosuspend(&pdev->dev);
   612			pm_runtime_set_autosuspend_delay(&pdev->dev, SPI_AUTOSUSPEND_TIMEOUT);
   613			pm_runtime_get_noresume(&pdev->dev);
   614			pm_runtime_set_active(&pdev->dev);
   615			pm_runtime_enable(&pdev->dev);
   616	
   617			ret = of_property_read_u32(pdev->dev.of_node, "num-cs", &num_cs);
   618			if (ret < 0)
   619				ctlr->num_chipselect = CDNS_SPI_DEFAULT_NUM_CS;
   620			else
   621				ctlr->num_chipselect = num_cs;
   622	
   623			ret = of_property_read_u32(pdev->dev.of_node, "is-decoded-cs",
   624						   &xspi->is_decoded_cs);
   625			if (ret < 0)
   626				xspi->is_decoded_cs = 0;
   627		}
   628	
   629		cdns_spi_detect_fifo_depth(xspi);
   630	
   631		/* SPI controller initializations */
   632		cdns_spi_init_hw(xspi, spi_controller_is_target(ctlr));
   633	
   634		irq = platform_get_irq(pdev, 0);
   635		if (irq < 0) {
   636			ret = irq;
   637			goto clk_dis_all;
   638		}
   639	
   640		ret = devm_request_irq(&pdev->dev, irq, cdns_spi_irq,
   641				       0, pdev->name, ctlr);
   642		if (ret != 0) {
   643			ret = -ENXIO;
   644			dev_err(&pdev->dev, "request_irq failed\n");
   645			goto clk_dis_all;
   646		}
   647	
   648		ctlr->use_gpio_descriptors = true;
   649		ctlr->prepare_transfer_hardware = cdns_prepare_transfer_hardware;
   650		ctlr->prepare_message = cdns_prepare_message;
   651		ctlr->transfer_one = cdns_transfer_one;
   652		ctlr->unprepare_transfer_hardware = cdns_unprepare_transfer_hardware;
   653		ctlr->mode_bits = SPI_CPOL | SPI_CPHA;
   654		ctlr->bits_per_word_mask = SPI_BPW_MASK(8);
   655	
   656		if (!spi_controller_is_target(ctlr)) {
   657			ctlr->mode_bits |=  SPI_CS_HIGH;
   658			ctlr->set_cs = cdns_spi_chipselect;
   659			ctlr->auto_runtime_pm = true;
   660			xspi->clk_rate = clk_get_rate(xspi->ref_clk);
   661			/* Set to default valid value */
   662			ctlr->max_speed_hz = xspi->clk_rate / 4;
   663			xspi->speed_hz = ctlr->max_speed_hz;
   664			pm_runtime_mark_last_busy(&pdev->dev);
   665			pm_runtime_put_autosuspend(&pdev->dev);
   666		} else {
   667			ctlr->mode_bits |= SPI_NO_CS;
   668			ctlr->target_abort = cdns_target_abort;
   669		}
   670		ret = spi_register_controller(ctlr);
   671		if (ret) {
   672			dev_err(&pdev->dev, "spi_register_controller failed\n");
   673			goto clk_dis_all;
   674		}
   675	
   676		return ret;
   677	
   678	clk_dis_all:
   679		if (!spi_controller_is_target(ctlr)) {
   680			pm_runtime_set_suspended(&pdev->dev);
   681			pm_runtime_disable(&pdev->dev);
   682		}
   683	remove_ctlr:
   684		spi_controller_put(ctlr);
   685		return ret;
   686	}
   687	

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