Hi Nathan,
On 2019/1/30 5:46, Nathan Chancellor wrote:
On arm little endian allyesconfig:
ld.lld: error: undefined symbol: __aeabi_uldivmod
>>> referenced by meson_nand.c
>>> mtd/nand/raw/meson_nand.o:(meson_nfc_setup_data_interface) in archive drivers/built-in.a
The dividend tBERS_max is u64, meaning we need to use DIV_ROUND_UP_ULL
(which wraps do_div) to prevent the compiler from emitting
__aebi_uldivmod.
Fixes: 2d570b34b41a ("mtd: rawnand: meson: add support for Amlogic NAND flash controller")
Signed-off-by: Nathan Chancellor <natechancellor@xxxxxxxxx>
---
drivers/mtd/nand/raw/meson_nand.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/mtd/nand/raw/meson_nand.c b/drivers/mtd/nand/raw/meson_nand.c
index e858d58d97b0..6f12a96195d1 100644
--- a/drivers/mtd/nand/raw/meson_nand.c
+++ b/drivers/mtd/nand/raw/meson_nand.c
@@ -1116,8 +1116,8 @@ int meson_nfc_setup_data_interface(struct nand_chip *nand, int csline,
div * NFC_CLK_CYCLE);
meson_chip->tadl = DIV_ROUND_UP(PSEC_TO_NSEC(timings->tADL_min),
div * NFC_CLK_CYCLE);
- tbers_clocks = DIV_ROUND_UP(PSEC_TO_NSEC(timings->tBERS_max),
- div * NFC_CLK_CYCLE);
+ tbers_clocks = DIV_ROUND_UP_ULL(PSEC_TO_NSEC(timings->tBERS_max),
+ div * NFC_CLK_CYCLE);
Looks good to me:
Acked-by: Liang Yang <liang.yang@xxxxxxxxxxx>
meson_chip->tbers_max = ilog2(tbers_clocks);
if (!is_power_of_2(tbers_clocks))
meson_chip->tbers_max++;
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