最近公司做的一个电源设备，要做成LXI设备，支持GPIB，USB和LAN，LAN已经解决了，USB有现成的，GPIB初步打算使用TNT882或NAT9914，在网上找到了很多51驱动这两个芯片的资料，直接用IO口模拟时序，但我们使用的主控是TI AM335X，可以把TNT882或NAT9914接到AM335X的GPMC上，现在GPMC已经接了NAND，如果再接上NAT9914 CS和中断脚不同，其他脚都和NAND复用，但驱动要怎么修改呢？附上NAND驱动的入口
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 },
};
setup_pin_mux(nand_pin_mux);
pdata = omap_nand_init(am335x_nand_partitions,
ARRAY_SIZE(am335x_nand_partitions), 0, 0,
&am335x_nand_timings);
if (!pdata)
return;
pdata->ecc_opt =OMAP_ECC_BCH8_CODE_HW;
pdata->elm_used = true;
gpmc_device[0].pdata = pdata;
gpmc_device[0].flag = GPMC_DEVICE_NAND;
omap_init_gpmc(gpmc_device, sizeof(gpmc_device));
omap_init_elm();
}
/* Pin mux for nand flash module */
static struct pinmux_config nand_pin_mux[] = {
{"gpmc_ad0.gpmc_ad0", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLUP},
{"gpmc_ad1.gpmc_ad1", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLUP},
{"gpmc_ad2.gpmc_ad2", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLUP},
{"gpmc_ad3.gpmc_ad3", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLUP},
{"gpmc_ad4.gpmc_ad4", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLUP},
{"gpmc_ad5.gpmc_ad5", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLUP},
{"gpmc_ad6.gpmc_ad6", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLUP},
{"gpmc_ad7.gpmc_ad7", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLUP},
{"gpmc_wait0.gpmc_wait0", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLUP},
{"gpmc_wpn.gpmc_wpn", OMAP_MUX_MODE7 | AM33XX_PIN_INPUT_PULLUP},
{"gpmc_csn0.gpmc_csn0", OMAP_MUX_MODE0 | AM33XX_PULL_DISA},
{"gpmc_advn_ale.gpmc_advn_ale", OMAP_MUX_MODE0 | AM33XX_PULL_DISA},
{"gpmc_oen_ren.gpmc_oen_ren", OMAP_MUX_MODE0 | AM33XX_PULL_DISA},
{"gpmc_wen.gpmc_wen", OMAP_MUX_MODE0 | AM33XX_PULL_DISA},
{"gpmc_ben0_cle.gpmc_ben0_cle", OMAP_MUX_MODE0 | AM33XX_PULL_DISA},
{NULL, 0},
};
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