Hi Naga, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on mtd/nand/next] [also build test WARNING on v4.20-rc1 next-20181109] [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/Naga-Sureshkumar-Relli/dt-bindings-mtd-arasan-Add-device-tree-binding-documentation/20181110-034106 base: git://git.infradead.org/linux-mtd.git nand/next config: sh-allyesconfig (attached as .config) compiler: sh4-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree GCC_VERSION=7.2.0 make.cross ARCH=sh All warnings (new ones prefixed by >>): In file included from include/linux/scatterlist.h:9:0, from include/linux/dma-mapping.h:11, from drivers/mtd//nand/raw/arasan_nand.c:12: drivers/mtd//nand/raw/arasan_nand.c: In function 'anfc_rw_dma_op': >> drivers/mtd//nand/raw/arasan_nand.c:353:16: warning: right shift count >= width of type [-Wshift-count-overflow] writel((paddr >> 32), nfc->base + DMA_ADDR1_OFST); ^ arch/sh/include/asm/io.h:31:77: note: in definition of macro '__raw_writel' #define __raw_writel(v,a) (__chk_io_ptr(a), *(volatile u32 __force *)(a) = (v)) ^ arch/sh/include/asm/io.h:46:62: note: in expansion of macro 'ioswabl' #define writel_relaxed(v,c) ((void)__raw_writel((__force u32)ioswabl(v),c)) ^~~~~~~ arch/sh/include/asm/io.h:56:32: note: in expansion of macro 'writel_relaxed' #define writel(v,a) ({ wmb(); writel_relaxed((v),(a)); }) ^~~~~~~~~~~~~~ >> drivers/mtd//nand/raw/arasan_nand.c:353:2: note: in expansion of macro 'writel' writel((paddr >> 32), nfc->base + DMA_ADDR1_OFST); ^~~~~~ vim +353 drivers/mtd//nand/raw/arasan_nand.c 325 326 static void anfc_rw_dma_op(struct mtd_info *mtd, u8 *buf, int len, 327 bool do_read, u32 prog, int pktcount, int pktsize) 328 { 329 dma_addr_t paddr; 330 struct nand_chip *chip = mtd_to_nand(mtd); 331 struct anfc_nand_controller *nfc = to_anfc(chip->controller); 332 struct anfc_nand_chip *achip = to_anfc_nand(chip); 333 u32 eccintr = 0, dir; 334 335 if (pktsize == 0) 336 pktsize = len; 337 338 anfc_setpktszcnt(nfc, pktsize, pktcount); 339 340 if (!achip->strength) 341 eccintr = MBIT_ERROR; 342 343 if (do_read) 344 dir = DMA_FROM_DEVICE; 345 else 346 dir = DMA_TO_DEVICE; 347 paddr = dma_map_single(nfc->dev, buf, len, dir); 348 if (dma_mapping_error(nfc->dev, paddr)) { 349 dev_err(nfc->dev, "Read buffer mapping error"); 350 return; 351 } 352 writel(paddr, nfc->base + DMA_ADDR0_OFST); > 353 writel((paddr >> 32), nfc->base + DMA_ADDR1_OFST); 354 anfc_enable_intrs(nfc, (XFER_COMPLETE | eccintr)); 355 writel(prog, nfc->base + PROG_OFST); 356 anfc_wait_for_event(nfc); 357 dma_unmap_single(nfc->dev, paddr, len, dir); 358 } 359 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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