Hi Arnd, Andy,
On 15/5/2020 10:30 pm, Arnd Bergmann wrote:
On Fri, May 15, 2020 at 4:25 PM Andy Shevchenko
<andy.shevchenko@xxxxxxxxx> wrote:
On Fri, May 15, 2020 at 4:48 PM kbuild test robot <lkp@xxxxxxxxx> wrote:
sparse warnings: (new ones prefixed by >>)
drivers/mtd/nand/raw/intel-nand-controller.c:441:24: sparse: sparse: incorrect type in argument 1 (different base types) @@ expected unsigned int val @@ got restricted __be32 [assignedunsigned int val @@
drivers/mtd/nand/raw/intel-nand-controller.c:441:24: sparse: expected unsigned int val
drivers/mtd/nand/raw/intel-nand-controller.c:441:24: sparse: got restricted __be32 [assigned] [usertype] reg
drivers/mtd/nand/raw/intel-nand-controller.c:444:24: sparse: sparse: incorrect type in argument 1 (different base types) @@ expected unsigned int val @@ got restricted __be32 [assignedunsigned int val @@
drivers/mtd/nand/raw/intel-nand-controller.c:444:24: sparse: expected unsigned int val
drivers/mtd/nand/raw/intel-nand-controller.c:444:24: sparse: got restricted __be32 [assigned] [usertype] reg
440 reg = cpu_to_be32(*pdata++);
> 441 writel(reg, ebu_host->hsnand + HSNAND_CMSG_0);
442
443 reg = cpu_to_be32(*pdata);
444 writel(reg, ebu_host->hsnand + HSNAND_CMSG_1);
On BE:
cpu_to_be32 -> no-op
writel() -> converts reg to LE
On LE:
cpu_to_be32 -> converts to BE
writel() -> no-op (in terms of conversion)
Seems to me that the proper API (if above is intended) should be swab32().
But something tells me that above is broken (or my understanding is wrong).
iowrite_be32() is the correct way to store word into a big-endian mmio register,
if that is the intention here.
Thank you for suggestions to use iowrite32be(), it suits exactly.
Regards
Vadivel
Arnd
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