Hi Mason,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on spi/for-next]
[also build test ERROR on v4.20-rc3 next-20181120]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Mason-Yang/spi-Add-Renesas-R-Car-RPC-SPI-controller-driver/20181120-020310
base:   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git for-next
config: x86_64-allmodconfig (attached as .config)
compiler: gcc-7 (Debian 7.3.0-1) 7.3.0
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

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

>> drivers/spi/spi-renesas-rpc.c:283:54: warning: incorrect type in argument 2 (different address spaces)
   drivers/spi/spi-renesas-rpc.c:283:54:    expected void const volatile [noderef] <asn:2>*addr
   drivers/spi/spi-renesas-rpc.c:283:54:    got void *<noident>
>> drivers/spi/spi-renesas-rpc.c:369:31: error: using member 'mem' in incomplete struct spi_mem_dirmap_desc
>> drivers/spi/spi-renesas-rpc.c:372:13: error: using member 'info' in incomplete struct spi_mem_dirmap_desc
   drivers/spi/spi-renesas-rpc.c:375:41: error: using member 'mem' in incomplete struct spi_mem_dirmap_desc
   drivers/spi/spi-renesas-rpc.c:379:41: error: using member 'mem' in incomplete struct spi_mem_dirmap_desc
   drivers/spi/spi-renesas-rpc.c:392:50: error: using member 'info' in incomplete struct spi_mem_dirmap_desc
   drivers/spi/spi-renesas-rpc.c:400:31: error: using member 'mem' in incomplete struct spi_mem_dirmap_desc
   drivers/spi/spi-renesas-rpc.c:403:13: error: using member 'info' in incomplete struct spi_mem_dirmap_desc
   drivers/spi/spi-renesas-rpc.c:409:41: error: using member 'mem' in incomplete struct spi_mem_dirmap_desc
   drivers/spi/spi-renesas-rpc.c:413:41: error: using member 'mem' in incomplete struct spi_mem_dirmap_desc
   drivers/spi/spi-renesas-rpc.c:445:31: error: using member 'mem' in incomplete struct spi_mem_dirmap_desc
   drivers/spi/spi-renesas-rpc.c:447:17: error: using member 'info' in incomplete struct spi_mem_dirmap_desc
   drivers/spi/spi-renesas-rpc.c:447:37: error: using member 'info' in incomplete struct spi_mem_dirmap_desc
   drivers/spi/spi-renesas-rpc.c:450:42: error: using member 'mem' in incomplete struct spi_mem_dirmap_desc
   drivers/spi/spi-renesas-rpc.c:454:17: error: using member 'info' in incomplete struct spi_mem_dirmap_desc
>> drivers/spi/spi-renesas-rpc.c:484:10: error: unknown field name in initializer
   drivers/spi/spi-renesas-rpc.c:485:10: error: unknown field name in initializer
   drivers/spi/spi-renesas-rpc.c:486:10: error: unknown field name in initializer
>> drivers/spi/spi-renesas-rpc.c:372:13: warning: unknown expression (8 46)
   drivers/spi/spi-renesas-rpc.c:403:13: warning: unknown expression (8 46)
   drivers/spi/spi-renesas-rpc.c:447:23: warning: unknown expression (8 46)
   drivers/spi/spi-renesas-rpc.c:447:43: warning: unknown expression (8 46)
   drivers/spi/spi-renesas-rpc.c:454:36: warning: unknown expression (8 46)
   drivers/spi/spi-renesas-rpc.c:366:47: warning: 'struct spi_mem_dirmap_desc' declared inside parameter list will not be visible outside of this definition or declaration
    static ssize_t rpc_spi_mem_dirmap_read(struct spi_mem_dirmap_desc *desc,
                                                  ^~~~~~~~~~~~~~~~~~~
   In file included from drivers/spi/spi-renesas-rpc.c:18:0:
   drivers/spi/spi-renesas-rpc.c: In function 'rpc_spi_mem_dirmap_read':
   drivers/spi/spi-renesas-rpc.c:369:51: error: dereferencing pointer to incomplete type 'struct spi_mem_dirmap_desc'
     struct rpc_spi *rpc = spi_master_get_devdata(desc->mem->spi->master);
                                                      ^
   include/linux/spi/spi.h:1333:66: note: in definition of macro 'spi_master_get_devdata'
    #define spi_master_get_devdata(_ctlr) spi_controller_get_devdata(_ctlr)
                                                                     ^~~~~
   drivers/spi/spi-renesas-rpc.c: At top level:
   drivers/spi/spi-renesas-rpc.c:397:48: warning: 'struct spi_mem_dirmap_desc' declared inside parameter list will not be visible outside of this definition or declaration
    static ssize_t rpc_spi_mem_dirmap_write(struct spi_mem_dirmap_desc *desc,
                                                   ^~~~~~~~~~~~~~~~~~~
   In file included from drivers/spi/spi-renesas-rpc.c:18:0:
   drivers/spi/spi-renesas-rpc.c: In function 'rpc_spi_mem_dirmap_write':
   drivers/spi/spi-renesas-rpc.c:400:51: error: dereferencing pointer to incomplete type 'struct spi_mem_dirmap_desc'
     struct rpc_spi *rpc = spi_master_get_devdata(desc->mem->spi->master);
                                                      ^
   include/linux/spi/spi.h:1333:66: note: in definition of macro 'spi_master_get_devdata'
    #define spi_master_get_devdata(_ctlr) spi_controller_get_devdata(_ctlr)
                                                                     ^~~~~
   drivers/spi/spi-renesas-rpc.c: At top level:
   drivers/spi/spi-renesas-rpc.c:443:45: warning: 'struct spi_mem_dirmap_desc' declared inside parameter list will not be visible outside of this definition or declaration
    static int rpc_spi_mem_dirmap_create(struct spi_mem_dirmap_desc *desc)
                                                ^~~~~~~~~~~~~~~~~~~
   In file included from drivers/spi/spi-renesas-rpc.c:18:0:
   drivers/spi/spi-renesas-rpc.c: In function 'rpc_spi_mem_dirmap_create':
   drivers/spi/spi-renesas-rpc.c:445:51: error: dereferencing pointer to incomplete type 'struct spi_mem_dirmap_desc'
     struct rpc_spi *rpc = spi_master_get_devdata(desc->mem->spi->master);
                                                      ^
   include/linux/spi/spi.h:1333:66: note: in definition of macro 'spi_master_get_devdata'
    #define spi_master_get_devdata(_ctlr) spi_controller_get_devdata(_ctlr)
                                                                     ^~~~~
   drivers/spi/spi-renesas-rpc.c: At top level:
   drivers/spi/spi-renesas-rpc.c:484:3: error: 'const struct spi_controller_mem_ops' has no member named 'dirmap_create'
     .dirmap_create = rpc_spi_mem_dirmap_create,
      ^~~~~~~~~~~~~
   drivers/spi/spi-renesas-rpc.c:484:19: error: positional initialization of field in 'struct' declared with 'designated_init' attribute [-Werror=designated-init]
     .dirmap_create = rpc_spi_mem_dirmap_create,
                      ^~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/spi/spi-renesas-rpc.c:484:19: note: (near initialization for 'rpc_spi_mem_ops')
   drivers/spi/spi-renesas-rpc.c:484:19: error: initialization from incompatible pointer type [-Werror=incompatible-pointer-types]
   drivers/spi/spi-renesas-rpc.c:484:19: note: (near initialization for 'rpc_spi_mem_ops.supports_op')
   drivers/spi/spi-renesas-rpc.c:485:3: error: 'const struct spi_controller_mem_ops' has no member named 'dirmap_read'
     .dirmap_read = rpc_spi_mem_dirmap_read,
      ^~~~~~~~~~~
   drivers/spi/spi-renesas-rpc.c:485:17: error: positional initialization of field in 'struct' declared with 'designated_init' attribute [-Werror=designated-init]
     .dirmap_read = rpc_spi_mem_dirmap_read,
                    ^~~~~~~~~~~~~~~~~~~~~~~
   drivers/spi/spi-renesas-rpc.c:485:17: note: (near initialization for 'rpc_spi_mem_ops')
   drivers/spi/spi-renesas-rpc.c:485:17: warning: excess elements in struct initializer
   drivers/spi/spi-renesas-rpc.c:485:17: note: (near initialization for 'rpc_spi_mem_ops')
   drivers/spi/spi-renesas-rpc.c:486:3: error: 'const struct spi_controller_mem_ops' has no member named 'dirmap_write'
     .dirmap_write = rpc_spi_mem_dirmap_write,
      ^~~~~~~~~~~~
   drivers/spi/spi-renesas-rpc.c:486:18: error: positional initialization of field in 'struct' declared with 'designated_init' attribute [-Werror=designated-init]
     .dirmap_write = rpc_spi_mem_dirmap_write,
                     ^~~~~~~~~~~~~~~~~~~~~~~~
   drivers/spi/spi-renesas-rpc.c:486:18: note: (near initialization for 'rpc_spi_mem_ops')
   drivers/spi/spi-renesas-rpc.c:486:18: warning: excess elements in struct initializer
   drivers/spi/spi-renesas-rpc.c:486:18: note: (near initialization for 'rpc_spi_mem_ops')
   cc1: some warnings being treated as errors

vim +/mem +369 drivers/spi/spi-renesas-rpc.c

c4789a83 Mason Yang 2018-11-19  226  
c4789a83 Mason Yang 2018-11-19  227  static int rpc_spi_io_xfer(struct rpc_spi *rpc,
c4789a83 Mason Yang 2018-11-19  228  			   const void *tx_buf, void *rx_buf)
c4789a83 Mason Yang 2018-11-19  229  {
c4789a83 Mason Yang 2018-11-19  230  	u32 smenr, smcr, data, pos = 0;
c4789a83 Mason Yang 2018-11-19  231  	int ret = 0;
c4789a83 Mason Yang 2018-11-19  232  
c4789a83 Mason Yang 2018-11-19  233  	writel(RPC_CMNCR_MD | RPC_CMNCR_SFDE | RPC_CMNCR_MOIIO_HIZ |
c4789a83 Mason Yang 2018-11-19  234  	       RPC_CMNCR_IOFV_HIZ | RPC_CMNCR_BSZ(0), rpc->regs + RPC_CMNCR);
c4789a83 Mason Yang 2018-11-19  235  	writel(0x0, rpc->regs + RPC_SMDRENR);
c4789a83 Mason Yang 2018-11-19  236  
c4789a83 Mason Yang 2018-11-19  237  	if (tx_buf) {
c4789a83 Mason Yang 2018-11-19  238  		writel(rpc->cmd, rpc->regs + RPC_SMCMR);
c4789a83 Mason Yang 2018-11-19  239  		writel(rpc->dummy, rpc->regs + RPC_SMDMCR);
c4789a83 Mason Yang 2018-11-19  240  		writel(rpc->addr, rpc->regs + RPC_SMADR);
c4789a83 Mason Yang 2018-11-19  241  		smenr = rpc->smenr;
c4789a83 Mason Yang 2018-11-19  242  
c4789a83 Mason Yang 2018-11-19  243  		while (pos < rpc->xferlen) {
c4789a83 Mason Yang 2018-11-19  244  			u32 nbytes = rpc->xferlen  - pos;
c4789a83 Mason Yang 2018-11-19  245  
c4789a83 Mason Yang 2018-11-19  246  			writel(*(u32 *)(tx_buf + pos), rpc->regs + RPC_SMWDR0);
c4789a83 Mason Yang 2018-11-19  247  
c4789a83 Mason Yang 2018-11-19  248  			if (nbytes > 4) {
c4789a83 Mason Yang 2018-11-19  249  				nbytes = 4;
c4789a83 Mason Yang 2018-11-19  250  				smcr = rpc->smcr |
c4789a83 Mason Yang 2018-11-19  251  				       RPC_SMCR_SPIE | RPC_SMCR_SSLKP;
c4789a83 Mason Yang 2018-11-19  252  			} else {
c4789a83 Mason Yang 2018-11-19  253  				smcr = rpc->smcr | RPC_SMCR_SPIE;
c4789a83 Mason Yang 2018-11-19  254  			}
c4789a83 Mason Yang 2018-11-19  255  
c4789a83 Mason Yang 2018-11-19  256  			writel(smenr, rpc->regs + RPC_SMENR);
c4789a83 Mason Yang 2018-11-19  257  			writel(smcr, rpc->regs + RPC_SMCR);
c4789a83 Mason Yang 2018-11-19  258  			ret = wait_msg_xfer_end(rpc);
c4789a83 Mason Yang 2018-11-19  259  			if (ret)
c4789a83 Mason Yang 2018-11-19  260  				goto out;
c4789a83 Mason Yang 2018-11-19  261  
c4789a83 Mason Yang 2018-11-19  262  			pos += nbytes;
c4789a83 Mason Yang 2018-11-19  263  			smenr = rpc->smenr & ~RPC_SMENR_CDE &
c4789a83 Mason Yang 2018-11-19  264  					     ~RPC_SMENR_ADE(0xf);
c4789a83 Mason Yang 2018-11-19  265  		}
c4789a83 Mason Yang 2018-11-19  266  	} else if (rx_buf) {
c4789a83 Mason Yang 2018-11-19  267  		while (pos < rpc->xferlen) {
c4789a83 Mason Yang 2018-11-19  268  			u32 nbytes = rpc->xferlen  - pos;
c4789a83 Mason Yang 2018-11-19  269  
c4789a83 Mason Yang 2018-11-19  270  			if (nbytes > 4)
c4789a83 Mason Yang 2018-11-19  271  				nbytes = 4;
c4789a83 Mason Yang 2018-11-19  272  
c4789a83 Mason Yang 2018-11-19  273  			writel(rpc->cmd, rpc->regs + RPC_SMCMR);
c4789a83 Mason Yang 2018-11-19  274  			writel(rpc->dummy, rpc->regs + RPC_SMDMCR);
c4789a83 Mason Yang 2018-11-19  275  			writel(rpc->addr + pos, rpc->regs + RPC_SMADR);
c4789a83 Mason Yang 2018-11-19  276  			writel(rpc->smenr, rpc->regs + RPC_SMENR);
c4789a83 Mason Yang 2018-11-19  277  			writel(rpc->smcr | RPC_SMCR_SPIE, rpc->regs + RPC_SMCR);
c4789a83 Mason Yang 2018-11-19  278  			ret = wait_msg_xfer_end(rpc);
c4789a83 Mason Yang 2018-11-19  279  			if (ret)
c4789a83 Mason Yang 2018-11-19  280  				goto out;
c4789a83 Mason Yang 2018-11-19  281  
c4789a83 Mason Yang 2018-11-19  282  			data = readl(rpc->regs + RPC_SMRDR0);
c4789a83 Mason Yang 2018-11-19 @283  			memcpy_fromio(rx_buf + pos, (void *)&data, nbytes);
c4789a83 Mason Yang 2018-11-19  284  			pos += nbytes;
c4789a83 Mason Yang 2018-11-19  285  		}
c4789a83 Mason Yang 2018-11-19  286  	} else {
c4789a83 Mason Yang 2018-11-19  287  		writel(rpc->cmd, rpc->regs + RPC_SMCMR);
c4789a83 Mason Yang 2018-11-19  288  		writel(rpc->dummy, rpc->regs + RPC_SMDMCR);
c4789a83 Mason Yang 2018-11-19  289  		writel(rpc->addr + pos, rpc->regs + RPC_SMADR);
c4789a83 Mason Yang 2018-11-19  290  		writel(rpc->smenr, rpc->regs + RPC_SMENR);
c4789a83 Mason Yang 2018-11-19  291  		writel(rpc->smcr | RPC_SMCR_SPIE, rpc->regs + RPC_SMCR);
c4789a83 Mason Yang 2018-11-19  292  		ret = wait_msg_xfer_end(rpc);
c4789a83 Mason Yang 2018-11-19  293  	}
c4789a83 Mason Yang 2018-11-19  294  out:
c4789a83 Mason Yang 2018-11-19  295  	return ret;
c4789a83 Mason Yang 2018-11-19  296  }
c4789a83 Mason Yang 2018-11-19  297  
c4789a83 Mason Yang 2018-11-19  298  static void rpc_spi_mem_set_prep_op_cfg(struct spi_device *spi,
c4789a83 Mason Yang 2018-11-19  299  					const struct spi_mem_op *op,
c4789a83 Mason Yang 2018-11-19  300  					u64 *offs, size_t *len)
c4789a83 Mason Yang 2018-11-19  301  {
c4789a83 Mason Yang 2018-11-19  302  	struct rpc_spi *rpc = spi_master_get_devdata(spi->master);
c4789a83 Mason Yang 2018-11-19  303  
c4789a83 Mason Yang 2018-11-19  304  	rpc->cmd = RPC_SMCMR_CMD(op->cmd.opcode);
c4789a83 Mason Yang 2018-11-19  305  	rpc->smenr = RPC_SMENR_CDE |
c4789a83 Mason Yang 2018-11-19  306  		     RPC_SMENR_CDB(fls(op->cmd.buswidth >> 1));
c4789a83 Mason Yang 2018-11-19  307  	rpc->totalxferlen = 1;
c4789a83 Mason Yang 2018-11-19  308  	rpc->xferlen = 0;
c4789a83 Mason Yang 2018-11-19  309  	rpc->addr = 0;
c4789a83 Mason Yang 2018-11-19  310  
c4789a83 Mason Yang 2018-11-19  311  	if (op->addr.nbytes) {
c4789a83 Mason Yang 2018-11-19  312  		rpc->smenr |= RPC_SMENR_ADB(fls(op->addr.buswidth >> 1));
c4789a83 Mason Yang 2018-11-19  313  		if (op->addr.nbytes == 4)
c4789a83 Mason Yang 2018-11-19  314  			rpc->smenr |= RPC_SMENR_ADE(0xf);
c4789a83 Mason Yang 2018-11-19  315  		else
c4789a83 Mason Yang 2018-11-19  316  			rpc->smenr |= RPC_SMENR_ADE(0x7);
c4789a83 Mason Yang 2018-11-19  317  
c4789a83 Mason Yang 2018-11-19  318  		if (!offs && !len)
c4789a83 Mason Yang 2018-11-19  319  			rpc->addr = *(u32 *)offs;
c4789a83 Mason Yang 2018-11-19  320  		else
c4789a83 Mason Yang 2018-11-19  321  			rpc->addr = op->addr.val;
c4789a83 Mason Yang 2018-11-19  322  		rpc->totalxferlen += op->addr.nbytes;
c4789a83 Mason Yang 2018-11-19  323  	}
c4789a83 Mason Yang 2018-11-19  324  
c4789a83 Mason Yang 2018-11-19  325  	if (op->dummy.nbytes) {
c4789a83 Mason Yang 2018-11-19  326  		rpc->smenr |= RPC_SMENR_DME;
c4789a83 Mason Yang 2018-11-19  327  		rpc->dummy = RPC_SMDMCR_DMCYC(op->dummy.nbytes);
c4789a83 Mason Yang 2018-11-19  328  		rpc->totalxferlen += op->dummy.nbytes;
c4789a83 Mason Yang 2018-11-19  329  	}
c4789a83 Mason Yang 2018-11-19  330  
c4789a83 Mason Yang 2018-11-19  331  	if (op->data.nbytes || (offs && len)) {
c4789a83 Mason Yang 2018-11-19  332  		rpc->smenr |= RPC_SMENR_SPIDE(rpc_bits_xfer(op->data.nbytes)) |
c4789a83 Mason Yang 2018-11-19  333  			      RPC_SMENR_SPIDB(fls(op->data.buswidth >> 1));
c4789a83 Mason Yang 2018-11-19  334  
c4789a83 Mason Yang 2018-11-19  335  		if (op->data.dir == SPI_MEM_DATA_IN) {
c4789a83 Mason Yang 2018-11-19  336  			rpc->smcr = RPC_SMCR_SPIRE;
c4789a83 Mason Yang 2018-11-19  337  			rpc->xfer_dir = SPI_MEM_DATA_IN;
c4789a83 Mason Yang 2018-11-19  338  		} else if (op->data.dir == SPI_MEM_DATA_OUT) {
c4789a83 Mason Yang 2018-11-19  339  			rpc->smcr = RPC_SMCR_SPIWE;
c4789a83 Mason Yang 2018-11-19  340  			rpc->xfer_dir = SPI_MEM_DATA_OUT;
c4789a83 Mason Yang 2018-11-19  341  		}
c4789a83 Mason Yang 2018-11-19  342  
c4789a83 Mason Yang 2018-11-19  343  		if (offs && len) {
c4789a83 Mason Yang 2018-11-19  344  			rpc->xferlen = *(u32 *)len;
c4789a83 Mason Yang 2018-11-19  345  			rpc->totalxferlen += *(u32 *)len;
c4789a83 Mason Yang 2018-11-19  346  		} else {
c4789a83 Mason Yang 2018-11-19  347  			rpc->xferlen = op->data.nbytes;
c4789a83 Mason Yang 2018-11-19  348  			rpc->totalxferlen += op->data.nbytes;
c4789a83 Mason Yang 2018-11-19  349  		}
c4789a83 Mason Yang 2018-11-19  350  	}
c4789a83 Mason Yang 2018-11-19  351  }
c4789a83 Mason Yang 2018-11-19  352  
c4789a83 Mason Yang 2018-11-19  353  static bool rpc_spi_mem_supports_op(struct spi_mem *mem,
c4789a83 Mason Yang 2018-11-19  354  				    const struct spi_mem_op *op)
c4789a83 Mason Yang 2018-11-19  355  {
c4789a83 Mason Yang 2018-11-19  356  	if (op->data.buswidth > 4 || op->addr.buswidth > 4 ||
c4789a83 Mason Yang 2018-11-19  357  	    op->dummy.buswidth > 4 || op->cmd.buswidth > 4)
c4789a83 Mason Yang 2018-11-19  358  		return false;
c4789a83 Mason Yang 2018-11-19  359  
c4789a83 Mason Yang 2018-11-19  360  	if (op->addr.nbytes > 4)
c4789a83 Mason Yang 2018-11-19  361  		return false;
c4789a83 Mason Yang 2018-11-19  362  
c4789a83 Mason Yang 2018-11-19  363  	return true;
c4789a83 Mason Yang 2018-11-19  364  }
c4789a83 Mason Yang 2018-11-19  365  
c4789a83 Mason Yang 2018-11-19  366  static ssize_t rpc_spi_mem_dirmap_read(struct spi_mem_dirmap_desc *desc,
c4789a83 Mason Yang 2018-11-19  367  				       u64 offs, size_t len, void *buf)
c4789a83 Mason Yang 2018-11-19  368  {
c4789a83 Mason Yang 2018-11-19 @369  	struct rpc_spi *rpc = spi_master_get_devdata(desc->mem->spi->master);
c4789a83 Mason Yang 2018-11-19  370  	int ret;
c4789a83 Mason Yang 2018-11-19  371  
c4789a83 Mason Yang 2018-11-19 @372  	if (WARN_ON(offs + desc->info.offset + len > U32_MAX))
c4789a83 Mason Yang 2018-11-19  373  		return -EINVAL;
c4789a83 Mason Yang 2018-11-19  374  
c4789a83 Mason Yang 2018-11-19  375  	ret = rpc_spi_set_freq(rpc, desc->mem->spi->max_speed_hz);
c4789a83 Mason Yang 2018-11-19  376  	if (ret)
c4789a83 Mason Yang 2018-11-19  377  		return ret;
c4789a83 Mason Yang 2018-11-19  378  
c4789a83 Mason Yang 2018-11-19  379  	rpc_spi_mem_set_prep_op_cfg(desc->mem->spi,
c4789a83 Mason Yang 2018-11-19  380  				    &desc->info.op_tmpl, &offs, &len);
c4789a83 Mason Yang 2018-11-19  381  
c4789a83 Mason Yang 2018-11-19  382  	writel(RPC_CMNCR_SFDE | RPC_CMNCR_MOIIO_HIZ |
c4789a83 Mason Yang 2018-11-19  383  	       RPC_CMNCR_IOFV_HIZ | RPC_CMNCR_BSZ(0), rpc->regs + RPC_CMNCR);
c4789a83 Mason Yang 2018-11-19  384  
c4789a83 Mason Yang 2018-11-19  385  	writel(RPC_DRCR_RBURST(0x1f) | RPC_DRCR_RBE, rpc->regs + RPC_DRCR);
c4789a83 Mason Yang 2018-11-19  386  	writel(rpc->cmd, rpc->regs + RPC_DRCMR);
c4789a83 Mason Yang 2018-11-19  387  	writel(RPC_DREAR_EAC, rpc->regs + RPC_DREAR);
c4789a83 Mason Yang 2018-11-19  388  	writel(0, rpc->regs + RPC_DROPR);
c4789a83 Mason Yang 2018-11-19  389  	writel(rpc->smenr, rpc->regs + RPC_DRENR);
c4789a83 Mason Yang 2018-11-19  390  	writel(rpc->dummy, rpc->regs + RPC_DRDMCR);
c4789a83 Mason Yang 2018-11-19  391  	writel(0x0, rpc->regs + RPC_DRDRENR);
c4789a83 Mason Yang 2018-11-19  392  	memcpy_fromio(buf, rpc->linear.map + desc->info.offset + offs, len);
c4789a83 Mason Yang 2018-11-19  393  
c4789a83 Mason Yang 2018-11-19  394  	return len;
c4789a83 Mason Yang 2018-11-19  395  }
c4789a83 Mason Yang 2018-11-19  396  
c4789a83 Mason Yang 2018-11-19  397  static ssize_t rpc_spi_mem_dirmap_write(struct spi_mem_dirmap_desc *desc,
c4789a83 Mason Yang 2018-11-19  398  					u64 offs, size_t len, const void *buf)
c4789a83 Mason Yang 2018-11-19  399  {
c4789a83 Mason Yang 2018-11-19 @400  	struct rpc_spi *rpc = spi_master_get_devdata(desc->mem->spi->master);
c4789a83 Mason Yang 2018-11-19  401  	int tx_offs, ret;
c4789a83 Mason Yang 2018-11-19  402  
c4789a83 Mason Yang 2018-11-19  403  	if (WARN_ON(offs + desc->info.offset + len > U32_MAX))
c4789a83 Mason Yang 2018-11-19  404  		return -EINVAL;
c4789a83 Mason Yang 2018-11-19  405  
c4789a83 Mason Yang 2018-11-19  406  	if (WARN_ON(len > RPC_WBUF_SIZE))
c4789a83 Mason Yang 2018-11-19  407  		return -EIO;
c4789a83 Mason Yang 2018-11-19  408  
c4789a83 Mason Yang 2018-11-19  409  	ret = rpc_spi_set_freq(rpc, desc->mem->spi->max_speed_hz);
c4789a83 Mason Yang 2018-11-19  410  	if (ret)
c4789a83 Mason Yang 2018-11-19  411  		return ret;
c4789a83 Mason Yang 2018-11-19  412  
c4789a83 Mason Yang 2018-11-19 @413  	rpc_spi_mem_set_prep_op_cfg(desc->mem->spi,
c4789a83 Mason Yang 2018-11-19  414  				    &desc->info.op_tmpl, &offs, &len);
c4789a83 Mason Yang 2018-11-19  415  
c4789a83 Mason Yang 2018-11-19  416  	writel(RPC_CMNCR_MD | RPC_CMNCR_SFDE | RPC_CMNCR_MOIIO_HIZ |
c4789a83 Mason Yang 2018-11-19  417  	       RPC_CMNCR_IOFV_HIZ | RPC_CMNCR_BSZ(0), rpc->regs + RPC_CMNCR);
c4789a83 Mason Yang 2018-11-19  418  	writel(0x0, rpc->regs + RPC_SMDRENR);
c4789a83 Mason Yang 2018-11-19  419  
c4789a83 Mason Yang 2018-11-19  420  	writel(RPC_PHYCNT_CAL | 0x260 | RPC_PHYCNT_WBUF2 | RPC_PHYCNT_WBUF,
c4789a83 Mason Yang 2018-11-19  421  	       rpc->regs + RPC_PHYCNT);
c4789a83 Mason Yang 2018-11-19  422  
c4789a83 Mason Yang 2018-11-19  423  	for (tx_offs = 0; tx_offs < RPC_WBUF_SIZE; tx_offs += 4)
c4789a83 Mason Yang 2018-11-19  424  		writel(*(u32 *)(buf + tx_offs), rpc->regs + RPC_WBUF + tx_offs);
c4789a83 Mason Yang 2018-11-19  425  
c4789a83 Mason Yang 2018-11-19  426  	writel(rpc->cmd, rpc->regs + RPC_SMCMR);
c4789a83 Mason Yang 2018-11-19  427  	writel(offs, rpc->regs + RPC_SMADR);
c4789a83 Mason Yang 2018-11-19  428  	writel(rpc->smenr, rpc->regs + RPC_SMENR);
c4789a83 Mason Yang 2018-11-19  429  	writel(rpc->smcr | RPC_SMCR_SPIE, rpc->regs + RPC_SMCR);
c4789a83 Mason Yang 2018-11-19  430  	ret = wait_msg_xfer_end(rpc);
c4789a83 Mason Yang 2018-11-19  431  	if (ret)
c4789a83 Mason Yang 2018-11-19  432  		goto out;
c4789a83 Mason Yang 2018-11-19  433  
c4789a83 Mason Yang 2018-11-19  434  	writel(RPC_DRCR_RCF, rpc->regs + RPC_DRCR);
c4789a83 Mason Yang 2018-11-19  435  	writel(RPC_PHYCNT_CAL | RPC_PHYCNT_STRTIM(0) | 0x260,
c4789a83 Mason Yang 2018-11-19  436  	       rpc->regs + RPC_PHYCNT);
c4789a83 Mason Yang 2018-11-19  437  
c4789a83 Mason Yang 2018-11-19  438  	return len;
c4789a83 Mason Yang 2018-11-19  439  out:
c4789a83 Mason Yang 2018-11-19  440  	return ret;
c4789a83 Mason Yang 2018-11-19  441  }
c4789a83 Mason Yang 2018-11-19  442  
c4789a83 Mason Yang 2018-11-19  443  static int rpc_spi_mem_dirmap_create(struct spi_mem_dirmap_desc *desc)
c4789a83 Mason Yang 2018-11-19  444  {
c4789a83 Mason Yang 2018-11-19  445  	struct rpc_spi *rpc = spi_master_get_devdata(desc->mem->spi->master);
c4789a83 Mason Yang 2018-11-19  446  
c4789a83 Mason Yang 2018-11-19  447  	if (desc->info.offset + desc->info.length > U32_MAX)
c4789a83 Mason Yang 2018-11-19  448  		return -ENOTSUPP;
c4789a83 Mason Yang 2018-11-19  449  
c4789a83 Mason Yang 2018-11-19  450  	if (!rpc_spi_mem_supports_op(desc->mem, &desc->info.op_tmpl))
c4789a83 Mason Yang 2018-11-19  451  		return -ENOTSUPP;
c4789a83 Mason Yang 2018-11-19  452  
c4789a83 Mason Yang 2018-11-19  453  	if (!rpc->linear.map &&
c4789a83 Mason Yang 2018-11-19  454  	    desc->info.op_tmpl.data.dir == SPI_MEM_DATA_IN)
c4789a83 Mason Yang 2018-11-19  455  		return -ENOTSUPP;
c4789a83 Mason Yang 2018-11-19  456  
c4789a83 Mason Yang 2018-11-19  457  	return 0;
c4789a83 Mason Yang 2018-11-19  458  }
c4789a83 Mason Yang 2018-11-19  459  
c4789a83 Mason Yang 2018-11-19  460  static int rpc_spi_mem_exec_op(struct spi_mem *mem,
c4789a83 Mason Yang 2018-11-19  461  			       const struct spi_mem_op *op)
c4789a83 Mason Yang 2018-11-19  462  {
c4789a83 Mason Yang 2018-11-19  463  	struct rpc_spi *rpc = spi_master_get_devdata(mem->spi->master);
c4789a83 Mason Yang 2018-11-19  464  	int ret;
c4789a83 Mason Yang 2018-11-19  465  
c4789a83 Mason Yang 2018-11-19  466  	ret = rpc_spi_set_freq(rpc, mem->spi->max_speed_hz);
c4789a83 Mason Yang 2018-11-19  467  	if (ret)
c4789a83 Mason Yang 2018-11-19  468  		return ret;
c4789a83 Mason Yang 2018-11-19  469  
c4789a83 Mason Yang 2018-11-19  470  	rpc_spi_mem_set_prep_op_cfg(mem->spi, op, NULL, NULL);
c4789a83 Mason Yang 2018-11-19  471  
c4789a83 Mason Yang 2018-11-19  472  	ret = rpc_spi_io_xfer(rpc,
c4789a83 Mason Yang 2018-11-19  473  			      op->data.dir == SPI_MEM_DATA_OUT ?
c4789a83 Mason Yang 2018-11-19  474  			      op->data.buf.out : NULL,
c4789a83 Mason Yang 2018-11-19  475  			      op->data.dir == SPI_MEM_DATA_IN ?
c4789a83 Mason Yang 2018-11-19  476  			      op->data.buf.in : NULL);
c4789a83 Mason Yang 2018-11-19  477  
c4789a83 Mason Yang 2018-11-19  478  	return ret;
c4789a83 Mason Yang 2018-11-19  479  }
c4789a83 Mason Yang 2018-11-19  480  
c4789a83 Mason Yang 2018-11-19  481  static const struct spi_controller_mem_ops rpc_spi_mem_ops = {
c4789a83 Mason Yang 2018-11-19  482  	.supports_op = rpc_spi_mem_supports_op,
c4789a83 Mason Yang 2018-11-19  483  	.exec_op = rpc_spi_mem_exec_op,
c4789a83 Mason Yang 2018-11-19 @484  	.dirmap_create = rpc_spi_mem_dirmap_create,
c4789a83 Mason Yang 2018-11-19  485  	.dirmap_read = rpc_spi_mem_dirmap_read,
c4789a83 Mason Yang 2018-11-19  486  	.dirmap_write = rpc_spi_mem_dirmap_write,
c4789a83 Mason Yang 2018-11-19  487  };
c4789a83 Mason Yang 2018-11-19  488  

:::::: The code at line 369 was first introduced by commit
:::::: c4789a83a8be18f144419fba933a3f5ca1b78837 spi: Add Renesas R-Car RPC SPI controller driver

:::::: TO: Mason Yang <masonccyang@mxic.com.tw>
:::::: CC: 0day robot <lkp@intel.com>

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0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation