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Message-ID: <202107200539.s2bYozEJ-lkp@intel.com>
Date: Tue, 20 Jul 2021 05:58:46 +0800
From: kernel test robot <lkp@...el.com>
To: Daniel Palmer <daniel@...f.com>
Cc: kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: [linux-chenxing:mstar_v5_14_rebase 126/352]
drivers/spi/spi-msc313-isp.c:303:13: warning: assignment discards 'const'
qualifier from pointer target type
tree: git://github.com/linux-chenxing/linux.git mstar_v5_14_rebase
head: 651efd0e52f225e60faa8b30f9768021e2104d3c
commit: 6d6f48bcd3ec1e7fdc903a8a093da960b7b328b8 [126/352] ARM: mstar: msc313 bdma driver
config: arm-allyesconfig (attached as .config)
compiler: arm-linux-gnueabi-gcc (GCC) 10.3.0
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/linux-chenxing/linux/commit/6d6f48bcd3ec1e7fdc903a8a093da960b7b328b8
git remote add linux-chenxing git://github.com/linux-chenxing/linux.git
git fetch --no-tags linux-chenxing mstar_v5_14_rebase
git checkout 6d6f48bcd3ec1e7fdc903a8a093da960b7b328b8
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-10.3.0 make.cross ARCH=arm
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>
All warnings (new ones prefixed by >>):
drivers/spi/spi-msc313-isp.c: In function 'msc313_isp_setup':
drivers/spi/spi-msc313-isp.c:173:21: warning: unused variable 'isp' [-Wunused-variable]
173 | struct msc313_isp *isp = spi_controller_get_devdata(spi->controller);
| ^~~
drivers/spi/spi-msc313-isp.c: In function 'msc313_isp_spi_mem_dirmap_create':
>> drivers/spi/spi-msc313-isp.c:303:13: warning: assignment discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers]
303 | desc->priv = readmode;
| ^
vim +/const +303 drivers/spi/spi-msc313-isp.c
bbf791fd03997b Daniel Palmer 2020-06-13 170
bbf791fd03997b Daniel Palmer 2020-06-13 171 static int msc313_isp_setup(struct spi_device *spi)
bbf791fd03997b Daniel Palmer 2020-06-13 172 {
bbf791fd03997b Daniel Palmer 2020-06-13 @173 struct msc313_isp *isp = spi_controller_get_devdata(spi->controller);
bbf791fd03997b Daniel Palmer 2020-06-13 174
bbf791fd03997b Daniel Palmer 2020-06-13 175 //clk_set_rate(isp->spi_div_clk, spi->max_speed_hz);
bbf791fd03997b Daniel Palmer 2020-06-13 176 //clk_set_rate(isp->spi_clk, spi->max_speed_hz);
bbf791fd03997b Daniel Palmer 2020-06-13 177
bbf791fd03997b Daniel Palmer 2020-06-13 178 return 0;
bbf791fd03997b Daniel Palmer 2020-06-13 179 }
bbf791fd03997b Daniel Palmer 2020-06-13 180
bbf791fd03997b Daniel Palmer 2020-06-13 181 static int msc313_isp_transfer_one(struct spi_controller *ctlr, struct spi_device *spi,
bbf791fd03997b Daniel Palmer 2020-06-13 182 struct spi_transfer *transfer)
bbf791fd03997b Daniel Palmer 2020-06-13 183 {
bbf791fd03997b Daniel Palmer 2020-06-13 184 struct msc313_isp *isp = spi_controller_get_devdata(ctlr);
bbf791fd03997b Daniel Palmer 2020-06-13 185 const u8 *tx_buf = transfer->tx_buf;
bbf791fd03997b Daniel Palmer 2020-06-13 186 u8 *rx_buf = transfer->rx_buf;
bbf791fd03997b Daniel Palmer 2020-06-13 187 unsigned b = 0;
bbf791fd03997b Daniel Palmer 2020-06-13 188
bbf791fd03997b Daniel Palmer 2020-06-13 189 /*
bbf791fd03997b Daniel Palmer 2020-06-13 190 * this only really works for SPI NOR <cs low><write something><read something><cs high>
bbf791fd03997b Daniel Palmer 2020-06-13 191 * transactions
bbf791fd03997b Daniel Palmer 2020-06-13 192 */
bbf791fd03997b Daniel Palmer 2020-06-13 193
bbf791fd03997b Daniel Palmer 2020-06-13 194 for(b = 0; b < transfer->len; b++) {
bbf791fd03997b Daniel Palmer 2020-06-13 195 if (tx_buf) {
bbf791fd03997b Daniel Palmer 2020-06-13 196 msc313_isp_spi_writebyte(isp, *tx_buf++);
bbf791fd03997b Daniel Palmer 2020-06-13 197 /* we don't do full duplex, there should be no rx buffer */
bbf791fd03997b Daniel Palmer 2020-06-13 198 if(rx_buf){
bbf791fd03997b Daniel Palmer 2020-06-13 199 }
bbf791fd03997b Daniel Palmer 2020-06-13 200 }
bbf791fd03997b Daniel Palmer 2020-06-13 201 else if(rx_buf){
bbf791fd03997b Daniel Palmer 2020-06-13 202 msc313_isp_spi_readbyte(isp, rx_buf++);
bbf791fd03997b Daniel Palmer 2020-06-13 203 }
bbf791fd03997b Daniel Palmer 2020-06-13 204 }
bbf791fd03997b Daniel Palmer 2020-06-13 205
bbf791fd03997b Daniel Palmer 2020-06-13 206 return 0;
bbf791fd03997b Daniel Palmer 2020-06-13 207 }
bbf791fd03997b Daniel Palmer 2020-06-13 208
bbf791fd03997b Daniel Palmer 2020-06-13 209 static void msc313_isp_set_cs(struct spi_device *spi, bool enable)
bbf791fd03997b Daniel Palmer 2020-06-13 210 {
bbf791fd03997b Daniel Palmer 2020-06-13 211 /* cs is asserted by the controller, we can only deassert it */
bbf791fd03997b Daniel Palmer 2020-06-13 212 struct msc313_isp *isp = spi_master_get_devdata(spi->master);
bbf791fd03997b Daniel Palmer 2020-06-13 213 if(!enable)
bbf791fd03997b Daniel Palmer 2020-06-13 214 msc313_isp_spi_clearcs(isp);
bbf791fd03997b Daniel Palmer 2020-06-13 215 }
bbf791fd03997b Daniel Palmer 2020-06-13 216
bbf791fd03997b Daniel Palmer 2020-06-13 217 static const struct msc313_qspi_readmode* msc313_isp_spi_mem_op_to_readmode(const struct spi_mem_op *op)
bbf791fd03997b Daniel Palmer 2020-06-13 218 {
bbf791fd03997b Daniel Palmer 2020-06-13 219 int i;
bbf791fd03997b Daniel Palmer 2020-06-13 220
bbf791fd03997b Daniel Palmer 2020-06-13 221 /*
bbf791fd03997b Daniel Palmer 2020-06-13 222 * The opcodes that the controller can execute are limited.
bbf791fd03997b Daniel Palmer 2020-06-13 223 * Check that the requested opcode is one we can use.
bbf791fd03997b Daniel Palmer 2020-06-13 224 */
bbf791fd03997b Daniel Palmer 2020-06-13 225 for (i = 0; i < ARRAY_SIZE(opcode_mapping); i++){
bbf791fd03997b Daniel Palmer 2020-06-13 226 if (opcode_mapping[i].opcode == op->cmd.opcode)
bbf791fd03997b Daniel Palmer 2020-06-13 227 return &opcode_mapping[i];
bbf791fd03997b Daniel Palmer 2020-06-13 228 }
bbf791fd03997b Daniel Palmer 2020-06-13 229
bbf791fd03997b Daniel Palmer 2020-06-13 230 return NULL;
bbf791fd03997b Daniel Palmer 2020-06-13 231 }
bbf791fd03997b Daniel Palmer 2020-06-13 232
bbf791fd03997b Daniel Palmer 2020-06-13 233 static bool msc313_isp_spi_mem_supports_op(struct spi_mem *mem,
bbf791fd03997b Daniel Palmer 2020-06-13 234 const struct spi_mem_op *op)
bbf791fd03997b Daniel Palmer 2020-06-13 235 {
bbf791fd03997b Daniel Palmer 2020-06-13 236 /* Maybe we should filter commands qspi can't handle here? */
bbf791fd03997b Daniel Palmer 2020-06-13 237 #if 0
bbf791fd03997b Daniel Palmer 2020-06-13 238 if (!msc313_isp_spi_mem_op_to_readmode(op)){
bbf791fd03997b Daniel Palmer 2020-06-13 239 return false;
bbf791fd03997b Daniel Palmer 2020-06-13 240 }
bbf791fd03997b Daniel Palmer 2020-06-13 241 #endif
bbf791fd03997b Daniel Palmer 2020-06-13 242
bbf791fd03997b Daniel Palmer 2020-06-13 243 return spi_mem_default_supports_op(mem, op);
bbf791fd03997b Daniel Palmer 2020-06-13 244 }
bbf791fd03997b Daniel Palmer 2020-06-13 245
bbf791fd03997b Daniel Palmer 2020-06-13 246 static int msc313_isp_exec_op(struct spi_mem *mem, const struct spi_mem_op *op)
bbf791fd03997b Daniel Palmer 2020-06-13 247 {
bbf791fd03997b Daniel Palmer 2020-06-13 248 struct msc313_isp *isp = spi_controller_get_devdata(mem->spi->controller);
bbf791fd03997b Daniel Palmer 2020-06-13 249 int i, ret = 0;
bbf791fd03997b Daniel Palmer 2020-06-13 250
bbf791fd03997b Daniel Palmer 2020-06-13 251 if(op->cmd.opcode)
bbf791fd03997b Daniel Palmer 2020-06-13 252 msc313_isp_spi_writebyte(isp, op->cmd.opcode);
bbf791fd03997b Daniel Palmer 2020-06-13 253 if(op->addr.nbytes != 0)
bbf791fd03997b Daniel Palmer 2020-06-13 254 for(i = op->addr.nbytes; i > 0; i--)
bbf791fd03997b Daniel Palmer 2020-06-13 255 msc313_isp_spi_writebyte(isp, (op->addr.val >> (8 * (i - 1))) & 0xff);
bbf791fd03997b Daniel Palmer 2020-06-13 256 if(op->dummy.nbytes != 0)
bbf791fd03997b Daniel Palmer 2020-06-13 257 for(i = 0; i < op->dummy.nbytes; i++)
bbf791fd03997b Daniel Palmer 2020-06-13 258 msc313_isp_spi_writebyte(isp, 0xff);
bbf791fd03997b Daniel Palmer 2020-06-13 259 switch(op->data.dir){
bbf791fd03997b Daniel Palmer 2020-06-13 260 case SPI_MEM_DATA_IN:
bbf791fd03997b Daniel Palmer 2020-06-13 261 for(i = 0; i < op->data.nbytes; i++)
bbf791fd03997b Daniel Palmer 2020-06-13 262 msc313_isp_spi_readbyte(isp, ((u8*)(op->data.buf.in + i)));
bbf791fd03997b Daniel Palmer 2020-06-13 263 break;
bbf791fd03997b Daniel Palmer 2020-06-13 264 case SPI_MEM_DATA_OUT:
bbf791fd03997b Daniel Palmer 2020-06-13 265 for(i = 0; i < op->data.nbytes; i++)
bbf791fd03997b Daniel Palmer 2020-06-13 266 msc313_isp_spi_writebyte(isp, *((u8*)(op->data.buf.out + i)));
bbf791fd03997b Daniel Palmer 2020-06-13 267 break;
bbf791fd03997b Daniel Palmer 2020-06-13 268 case SPI_MEM_NO_DATA:
bbf791fd03997b Daniel Palmer 2020-06-13 269 break;
bbf791fd03997b Daniel Palmer 2020-06-13 270 }
bbf791fd03997b Daniel Palmer 2020-06-13 271
bbf791fd03997b Daniel Palmer 2020-06-13 272 msc313_isp_spi_clearcs(isp);
bbf791fd03997b Daniel Palmer 2020-06-13 273 return ret;
bbf791fd03997b Daniel Palmer 2020-06-13 274 }
bbf791fd03997b Daniel Palmer 2020-06-13 275
bbf791fd03997b Daniel Palmer 2020-06-13 276 static int msc313_isp_spi_mem_dirmap_create(struct spi_mem_dirmap_desc *desc)
bbf791fd03997b Daniel Palmer 2020-06-13 277 {
bbf791fd03997b Daniel Palmer 2020-06-13 278 const struct msc313_qspi_readmode *readmode = NULL;
bbf791fd03997b Daniel Palmer 2020-06-13 279 struct spi_mem_op *tmpl = &desc->info.op_tmpl;
bbf791fd03997b Daniel Palmer 2020-06-13 280
bbf791fd03997b Daniel Palmer 2020-06-13 281 /*
bbf791fd03997b Daniel Palmer 2020-06-13 282 * The QSPI controller only supports reads, the FSP seems
bbf791fd03997b Daniel Palmer 2020-06-13 283 * to be for writing.
bbf791fd03997b Daniel Palmer 2020-06-13 284 */
bbf791fd03997b Daniel Palmer 2020-06-13 285 if (tmpl->data.dir != SPI_MEM_DATA_IN)
bbf791fd03997b Daniel Palmer 2020-06-13 286 return -ENOTSUPP;
bbf791fd03997b Daniel Palmer 2020-06-13 287
bbf791fd03997b Daniel Palmer 2020-06-13 288 /*
bbf791fd03997b Daniel Palmer 2020-06-13 289 * We can only do 2 or 3 address bytes
bbf791fd03997b Daniel Palmer 2020-06-13 290 */
bbf791fd03997b Daniel Palmer 2020-06-13 291 if ((tmpl->addr.nbytes != 2) &&
bbf791fd03997b Daniel Palmer 2020-06-13 292 (tmpl->addr.nbytes != 3))
bbf791fd03997b Daniel Palmer 2020-06-13 293 return -ENOTSUPP;
bbf791fd03997b Daniel Palmer 2020-06-13 294
bbf791fd03997b Daniel Palmer 2020-06-13 295
bbf791fd03997b Daniel Palmer 2020-06-13 296 readmode = msc313_isp_spi_mem_op_to_readmode(&desc->info.op_tmpl);
bbf791fd03997b Daniel Palmer 2020-06-13 297 if (!readmode){
bbf791fd03997b Daniel Palmer 2020-06-13 298 pr_info("Opcode %x isn't supported by QSPI\n",
bbf791fd03997b Daniel Palmer 2020-06-13 299 (unsigned) desc->info.op_tmpl.cmd.opcode);
bbf791fd03997b Daniel Palmer 2020-06-13 300 return -ENOTSUPP;
bbf791fd03997b Daniel Palmer 2020-06-13 301 }
bbf791fd03997b Daniel Palmer 2020-06-13 302
bbf791fd03997b Daniel Palmer 2020-06-13 @303 desc->priv = readmode;
bbf791fd03997b Daniel Palmer 2020-06-13 304
bbf791fd03997b Daniel Palmer 2020-06-13 305 pr_info("Opcode %x \n",
bbf791fd03997b Daniel Palmer 2020-06-13 306 (unsigned) readmode->opcode);
bbf791fd03997b Daniel Palmer 2020-06-13 307
bbf791fd03997b Daniel Palmer 2020-06-13 308 desc->nodirmap = 0;
bbf791fd03997b Daniel Palmer 2020-06-13 309
bbf791fd03997b Daniel Palmer 2020-06-13 310 return 0;
bbf791fd03997b Daniel Palmer 2020-06-13 311 }
bbf791fd03997b Daniel Palmer 2020-06-13 312
:::::: The code at line 303 was first introduced by commit
:::::: bbf791fd03997b4f5f9fb5af63cc60be07b7bf40 MSC313e: spinor driver
:::::: TO: Daniel Palmer <daniel@...f.com>
:::::: CC: Daniel Palmer <daniel@...f.com>
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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