I'm trying to read a byte from register IIMSCS2,
But every time I try the kernel get stuck.
Other registers like IIMSREV are readable but I can't read IIMSCS0 to IIMSCS3
I'm using Linux 3.2 on a I.MX35 and some hardware bits are signed in this register.
u8 rev = (__raw_readb(MX35_IO_ADDRESS(MX35_IIM_BASE_ADDR + MXC_IIMSCS2))) & 0x7F;
I got a succesfull result in previous kernel 2.6.28 and 2.6.31.
With this code:
unsigned char *iim_base;
unsigned char reg;
iim_base = ioremap(IIM_BASE_ADDR, SZ_4K);
reg = *(iim_base + IIM_SCS2_OFFSET);
u8 rev = reg & IIM_SCS_DATA_MASK; // 0x7F
Also this piece of code ain't working for kernel 3.2
Can someone explain this?