From 1b83a9f41bd13dae09fabf594918ea36a9bc0cfc Mon Sep 17 00:00:00 2001 From: Jacopo Mondi Date: Sat, 10 May 2025 10:48:52 +0200 Subject: media: amlogic: c3-mipi-csi2: Handle 64-bits division The kernel test robot reports the following error when building on Hexagon with hexagon-allmodconfig. ERROR: modpost: "__hexagon_divdi3" [drivers/media/platform/amlogic/c3/mipi-csi2/c3-mipi-csi2.ko] undefined! The error is caused by using DIV_ROUND_UP() with a 64 bits divisor with a 32-bit dividend, which on Hexagon and clang-17 is resolved with a call to the __hexagon_divdi3() helper function, part of the compiler support library and not available when building Linux. Use DIV_ROUND_UP_ULL() to fix the build error and avoid calling the __hexagon_divdi3() helper function. Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/202505101334.UHxNcUUO-lkp@intel.com/ Signed-off-by: Jacopo Mondi Signed-off-by: Hans Verkuil --- drivers/media/platform/amlogic/c3/mipi-csi2/c3-mipi-csi2.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/media/platform/amlogic/c3/mipi-csi2/c3-mipi-csi2.c b/drivers/media/platform/amlogic/c3/mipi-csi2/c3-mipi-csi2.c index f92815ffa4ae..1011ab3ebac7 100644 --- a/drivers/media/platform/amlogic/c3/mipi-csi2/c3-mipi-csi2.c +++ b/drivers/media/platform/amlogic/c3/mipi-csi2/c3-mipi-csi2.c @@ -5,6 +5,7 @@ #include #include +#include #include #include #include @@ -321,7 +322,7 @@ static void c3_mipi_csi_cfg_dphy(struct c3_csi_device *csi, s64 rate) u32 settle; /* Calculate the high speed settle */ - val = DIV_ROUND_UP(1000000000, rate); + val = DIV_ROUND_UP_ULL(1000000000, rate); settle = (16 * val + 230) / 10; c3_mipi_csi_write(csi, MIPI_PHY_CLK_LANE_CTRL, -- cgit