Hi, On Tue, 13 Jun 2017 10:11:17 +0800 Kever Yang wrote: > Hi Simon, > > > On 06/09/2017 08:28 PM, Simon Glass wrote: > > On 7 June 2017 at 19:20, Kever Yang <kever.y...@rock-chips.com> wrote: > >> According to MMC spec, the write_counter is 4-byte length, > >> use 'int' instead of 'long' type for the 'long' is not 4-byte > >> in 64 bit CPU. > >> > >> Signed-off-by: Jason Zhu <jason....@rock-chips.com> > >> Signed-off-by: Kever Yang <kever.y...@rock-chips.com> > >> --- > >> > >> drivers/mmc/rpmb.c | 2 +- > >> 1 file changed, 1 insertion(+), 1 deletion(-) > > So should we use uint32_t? > > Yes, we can use uint32_t, I use 'unsigned int' just for the same format > with other > members in the structure which using unsigned char/short. > > Is there a doc for which kind of data format prefer to use first in U-Boot? > unsigned int, uint32_t, u32; > uint32_t is guaranteed to be of size 32bit according to the C spec. '[unsigned] int' is only guaranteed to be at least 32bit but can be larger on some machine. A good overview of the C data types and their properties can be found at: https://en.wikipedia.org/wiki/C_data_types
Lothar Waßmann _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot
