Tool/software: Linux
Hi,
SDK:linux3.2SDK
The customer connected a 8-bit parallel device with GPMC. Below is the configuration.
gpmc_cs_write_reg(cs,GPMC_CS_CONFIG1, 0x0);
gpmc_cs_configure(cs, GPMC_CONFIG_DEV_TYPE, GPMC_DEVICETYPE_NOR);
val = gpmc_cs_read_reg(cs,GPMC_CS_CONFIG1);
val |= GPMC_CONFIG1_READTYPE_SYNC;
val |= GPMC_CONFIG1_WRITETYPE_SYNC;
gpmc_cs_write_reg(cs, GPMC_CS_CONFIG1, val);
gpmc_cs_set_timings(cs, &uc_timing);
gpmc_cs_request(cs, SZ_16M, &mem_base_phys);
if (!request_mem_region(mem_base_phys,SZ_16M, "UC")) {
ret = -EBUSY;
goto ERR;
}
mmio = ioremap((mem_base_phys,SZ_16M);
offset = 0x800;
__raw_writeb(0XE2,mmio+offset);——>error:Segmentation fault
What may cause that error? Please help analyze.
