Re: [PATCH 5/5] cadence-xspi: Add xfer capabilities

[kernel test robot <lkp@intel.com>]

Hi Witold,

kernel test robot noticed the following build warnings:

[auto build test WARNING on broonie-spi/for-next]
[also build test WARNING on linus/master v6.9-rc1 next-20240328]
[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/Witold-Sadowski/spi-cadence-Add-new-bindings-documentation-for-Cadence-XSPI/20240330-035124
base:   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git for-next
patch link:    https://lore.kernel.org/r/20240329194849.25554-6-wsadowski%40marvell.com
patch subject: [PATCH 5/5] cadence-xspi: Add xfer capabilities
config: x86_64-randconfig-123-20240331 (https://download.01.org/0day-ci/archive/20240331/202403311133.jOI5kbg4-lkp@intel.com/config)
compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240331/202403311133.jOI5kbg4-lkp@intel.com/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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202403311133.jOI5kbg4-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/spi/spi-cadence-xspi.c: In function 'cdns_xspi_setup':
   drivers/spi/spi-cadence-xspi.c:892:36: error: implicit declaration of function 'spi_master_get_devdata'; did you mean 'spi_mem_get_drvdata'? [-Werror=implicit-function-declaration]
     struct cdns_xspi_dev *cdns_xspi = spi_master_get_devdata(spi_dev->master);
                                       ^~~~~~~~~~~~~~~~~~~~~~
                                       spi_mem_get_drvdata
   drivers/spi/spi-cadence-xspi.c:892:66: error: 'struct spi_device' has no member named 'master'
     struct cdns_xspi_dev *cdns_xspi = spi_master_get_devdata(spi_dev->master);
                                                                     ^~
   drivers/spi/spi-cadence-xspi.c: In function 'cdns_xspi_transfer_one_message_b0':
>> drivers/spi/spi-cadence-xspi.c:1029:36: warning: initialization makes pointer from integer without a cast [-Wint-conversion]
     struct cdns_xspi_dev *cdns_xspi = spi_master_get_devdata(master);
                                       ^~~~~~~~~~~~~~~~~~~~~~
>> drivers/spi/spi-cadence-xspi.c:1035:11: warning: initialization makes integer from pointer without a cast [-Wint-conversion]
     int cs = spi->chip_select;
              ^~~
   drivers/spi/spi-cadence-xspi.c: At top level:
   drivers/spi/spi-cadence-xspi.c:1242:0: error: unterminated #ifdef
    #ifdef CONFIG_OF
    
   cc1: some warnings being treated as errors


vim +1029 drivers/spi/spi-cadence-xspi.c

  1025	
  1026	int cdns_xspi_transfer_one_message_b0(struct spi_controller *master,
  1027						   struct spi_message *m)
  1028	{
> 1029		struct cdns_xspi_dev *cdns_xspi = spi_master_get_devdata(master);
  1030		struct spi_device *spi = m->spi;
  1031		struct spi_transfer *t = NULL;
  1032	
  1033		const int max_len = XFER_QWORD_BYTECOUNT * XFER_QWORD_COUNT;
  1034		int current_cycle_count;
> 1035		int cs = spi->chip_select;
  1036		int cs_change = 0;
  1037	
  1038		/* Enable xfer state machine */
  1039		if (!cdns_xspi->xfer_in_progress) {
  1040			u32 xfer_control = readl(cdns_xspi->xferbase + SPIX_XFER_FUNC_CTRL);
  1041	
  1042			cdns_xspi->current_xfer_qword = 0;
  1043			cdns_xspi->xfer_in_progress = true;
  1044			xfer_control |= (XFER_RECEIVE_ENABLE |
  1045					 XFER_CLK_CAPTURE_POL |
  1046					 XFER_FUNC_START |
  1047					 XFER_SOFT_RESET |
  1048					 FIELD_PREP(XFER_CS_N_HOLD, (1 << cs)));
  1049			xfer_control &= ~(XFER_FUNC_ENABLE | XFER_CLK_DRIVE_POL);
  1050			writel(xfer_control, cdns_xspi->xferbase + SPIX_XFER_FUNC_CTRL);
  1051		}
  1052	
  1053		list_for_each_entry(t, &m->transfers, transfer_list) {
  1054			u8 *txd = (u8 *) t->tx_buf;
  1055			u8 *rxd = (u8 *) t->rx_buf;
  1056			u8 data[10];
  1057			u32 cmd_regs[6];
  1058	
  1059			if (!txd)
  1060				txd = data;
  1061	
  1062			cdns_xspi->in_buffer = txd + 1;
  1063			cdns_xspi->out_buffer = txd + 1;
  1064	
  1065			while (t->len) {
  1066	
  1067				current_cycle_count = t->len > max_len ? max_len : t->len;
  1068	
  1069				if (current_cycle_count < 10) {
  1070					cdns_xspi_prepare_generic(cs, txd, current_cycle_count,
  1071								  false, cmd_regs);
  1072					cdns_xspi_trigger_command(cdns_xspi, cmd_regs);
  1073					if (cdns_xspi_stig_ready(cdns_xspi, true))
  1074						return -EIO;
  1075				} else {
  1076					cdns_xspi_prepare_generic(cs, txd, 1, true, cmd_regs);
  1077					cdns_xspi_trigger_command(cdns_xspi, cmd_regs);
  1078					cdns_xspi_prepare_transfer(cs, 1, current_cycle_count - 1,
  1079								   cmd_regs);
  1080					cdns_xspi_trigger_command(cdns_xspi, cmd_regs);
  1081					if (cdns_xspi_sdma_ready(cdns_xspi, true))
  1082						return -EIO;
  1083					cdns_xspi_sdma_handle(cdns_xspi);
  1084					if (cdns_xspi_stig_ready(cdns_xspi, true))
  1085						return -EIO;
  1086	
  1087					cdns_xspi->in_buffer += current_cycle_count;
  1088					cdns_xspi->out_buffer += current_cycle_count;
  1089				}
  1090	
  1091				if (rxd) {
  1092					int j;
  1093	
  1094					for (j = 0; j < current_cycle_count / 8; j++)
  1095						cdns_xspi_read_single_qword(cdns_xspi, &rxd);
  1096					cdns_xspi_finish_read(cdns_xspi, &rxd, current_cycle_count);
  1097				} else {
  1098					cdns_xspi->current_xfer_qword += current_cycle_count /
  1099									 XFER_QWORD_BYTECOUNT;
  1100					if (current_cycle_count % XFER_QWORD_BYTECOUNT)
  1101						cdns_xspi->current_xfer_qword++;
  1102	
  1103					cdns_xspi->current_xfer_qword %= XFER_QWORD_COUNT;
  1104				}
  1105				cs_change = t->cs_change;
  1106				t->len -= current_cycle_count;
  1107			}
  1108		}
  1109	
  1110		if (!cs_change) {
  1111			u32 xfer_control = readl(cdns_xspi->xferbase + SPIX_XFER_FUNC_CTRL);
  1112	
  1113			xfer_control &= ~(XFER_RECEIVE_ENABLE |
  1114					  XFER_SOFT_RESET);
  1115			writel(xfer_control, cdns_xspi->xferbase + SPIX_XFER_FUNC_CTRL);
  1116			cdns_xspi->xfer_in_progress = false;
  1117		}
  1118	
  1119		m->status = 0;
  1120		spi_finalize_current_message(master);
  1121	
  1122		return 0;
  1123	}
  1124	

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