am335x evm外接两个8位的nand flash

答案对人有帮助，有参考价值 0

标红色的地方写错了，omap_init_gpmc是添加了一个omap-gpmc的设备，gpmc函数最后
for (p = gpmc_device->pdata; p; gpmc_device++, p = gpmc_device->pdata)
if (gpmc_device->flag & GPMC_DEVICE_NAND)
gpmc_nand_init((struct omap_nand_platform_data *) p);
这里依次判断cs的类型是否为nand，是的话就调用gpmc_nand_init完成nand的初始化，并注册omap-nand设备

改动就比较简单了,我手上没有两块nand的板子，你试一下
board-flash.c
#define MAX_NAND_NUM 2
static struct omap_nand_platform_data omap_nand_data[MAX_NAND_NUM] = [
//.gpmc_t = &nand_default_timings,
];
struct omap_nand_platform_data *
__init omap_nand_init(struct mtd_partition *nand_parts, u8 nr_parts, u8 cs,
int nand_type, struct gpmc_timings *gpmc_t)
[
if( cs >= MAX_NAND_NUM)
return NULL;
omap_nand_data[cs].cs = cs;
omap_nand_data[cs].parts = nand_parts;
omap_nand_data[cs].nr_parts = nr_parts;
omap_nand_data[cs].devsize = nand_type;
omap_nand_data[cs].gpmc_t = gpmc_t;
return &omap_nand_data[cs];
]

board-am335xevm.c
static void evm_nand_init(int evm_id, int profile)
[
struct omap_nand_platform_data *pdata;
struct gpmc_devices_info gpmc_device[2] = [
[ NULL, 0 ],
[ NULL, 0 ],
];
int i;
setup_pin_mux(nand_pin_mux);
for(i=0;i<2;i++)[
pdata = omap_nand_init(am335x_nand_partitions,
ARRAY_SIZE(am335x_nand_partitions), i, 0,
&am335x_nand_timings);
if (!pdata)
return;
pdata->ecc_opt =OMAP_ECC_BCH8_CODE_HW;
pdata->elm_used = true;
gpmc_device.pdata = pdata;
gpmc_device.flag = GPMC_DEVICE_NAND;
]
omap_init_gpmc(gpmc_device, sizeof(gpmc_device));
omap_init_elm();