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am335x芯片，请问这样初始化引脚可以吗？

lei kou
Prodigy 250 points


开发板原来的板极文件相关引脚的初始化如下：（现在我要复用这些引脚）

/* Module pin mux for rgmii2 */
static struct pinmux_config rgmii2_pin_mux[] = {
{"gpmc_a0.rgmii2_tctl", OMAP_MUX_MODE2 | AM33XX_PIN_OUTPUT},
{"gpmc_a1.rgmii2_rctl", OMAP_MUX_MODE2 | AM33XX_PIN_INPUT_PULLDOWN},
{"gpmc_a2.rgmii2_td3", OMAP_MUX_MODE2 | AM33XX_PIN_OUTPUT},
{"gpmc_a3.rgmii2_td2", OMAP_MUX_MODE2 | AM33XX_PIN_OUTPUT},
{"gpmc_a4.rgmii2_td1", OMAP_MUX_MODE2 | AM33XX_PIN_OUTPUT},
{"gpmc_a5.rgmii2_td0", OMAP_MUX_MODE2 | AM33XX_PIN_OUTPUT},
{"gpmc_a6.rgmii2_tclk", OMAP_MUX_MODE2 | AM33XX_PIN_OUTPUT},
{"gpmc_a7.rgmii2_rclk", OMAP_MUX_MODE2 | AM33XX_PIN_INPUT_PULLDOWN},
{"gpmc_a8.rgmii2_rd3", OMAP_MUX_MODE2 | AM33XX_PIN_INPUT_PULLDOWN},
{"gpmc_a9.rgmii2_rd2", OMAP_MUX_MODE2 | AM33XX_PIN_INPUT_PULLDOWN},
{"gpmc_a10.rgmii2_rd1", OMAP_MUX_MODE2 | AM33XX_PIN_INPUT_PULLDOWN},
{"gpmc_a11.rgmii2_rd0", OMAP_MUX_MODE2 | AM33XX_PIN_INPUT_PULLDOWN},
{"mdio_data.mdio_data", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLUP},
{"mdio_clk.mdio_clk", OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT_PULLUP},
{NULL, 0},
};

/* 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},
};

现在我想用gpmc总线连接FPGA，在板极文件中加入如下的初始化引脚，请问会和以前的引脚初始化冲突吗？如果会要怎么解决呢？多谢！

// module pin mux for gpmc
static struct pinmux_config gpmc_pin_mux[]={
{"gpmc_a1.gpmc_a1", OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT | AM33XX_PULL_DISA},
{"gpmc_a2.gpmc_a2", OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT | AM33XX_PULL_DISA},
{"gpmc_a3.gpmc_a3", OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT | AM33XX_PULL_DISA},
{"gpmc_a4.gpmc_a4", OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT | AM33XX_PULL_DISA},
{"gpmc_a5.gpmc_a5", OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT | AM33XX_PULL_DISA},
{"gpmc_a6.gpmc_a6", OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT | AM33XX_PULL_DISA},
{"gpmc_a7.gpmc_a7", OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT | AM33XX_PULL_DISA},
{"gpmc_a8.gpmc_a8", OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT | AM33XX_PULL_DISA},


{"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_ad8.gpmc_ad8", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLUP},
{"gpmc_ad9.gpmc_ad9", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLUP},
{"gpmc_ad10.gpmc_ad10", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLUP},
{"gpmc_ad11.gpmc_ad11", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLUP},
{"gpmc_ad12.gpmc_ad12", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLUP},
{"gpmc_ad13.gpmc_ad13", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLUP},
{"gpmc_ad14.gpmc_ad14", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLUP},
{"gpmc_ad15.gpmc_ad15", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLUP},


{"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},
{"gpmc_wpn.gpmc_wpn", OMAP_MUX_MODE7 | AM33XX_PIN_INPUT_PULLUP},

{"gpmc_clk.gpmc_wait1", OMAP_MUX_MODE2 | AM33XX_PIN_INPUT_PULLUP},
//{"gpmc_clk.gpmc_clk", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLUP},

/*must be set as an input*/
{"gpmc_csn1.gpmc_clk", OMAP_MUX_MODE1 | AM33XX_PIN_INPUT_PULLUP},
//{"gpmc_csn1.gpmc_csn1", OMAP_MUX_MODE0 | AM33XX_PULL_DISA},


//{"gpmc_csn2.gpmc_csn2", OMAP_MUX_MODE0 | AM33XX_PULL_DISA},
{"gpmc_csn3.gpmc_csn3", OMAP_MUX_MODE0 | AM33XX_PULL_DISA},

{NULL, 0},
};

  • 0
    TI__Mastermind 25020 points

    你这里RGMII2接口和GPMC冲突了，比如GPMC_A1这个脚，既作为了RGMII2_RCTL功能，又做了gpmc_a1的功能。

    一个pin脚在一个时间内只能做一个功能，如果按照你这样的配置，在一个时间内，只能用作RGMII2，或者GPMC。一种解决方案是可以把GPMC_A1的口分配到别的复用模式上去，比如LCD_DATA1.GPMC_A1。这个问题，用一下pinmux工具就一目了然了。

  • 0 回复 Steven Liu1
    Prodigy 250 points

    你好！谢谢回复，我不太会用pinmux，我把RGMII2那一段引脚初始化的代码删掉可以吗？多谢！

  • 0 回复 lei kou
    TI__Mastermind 25020 points

    你需要RGMII2口么，如果不用，不使能他就行了。这段代码删掉是可以，另外提个醒，这段代码只是RGMII2管脚配置的数组定义，未必会配置执行，要看你自己的配置用的是哪个。

    你现在看的应该是kernel里面的board-am335xevm.c文件吧，这段数组的定义被使能调用在rgmii2_init函数中，而这个函数在gen_purp_evm_dev_cfg和evm_sk_dev_cfg会被使能，就需要你做些处理。如果是使用beaglebone的配置的话就不会调用，也就不存在上面的问题了。建议你追代码，搞清楚配置是怎么进行的，这样后面修改pinmux的时候也会比较容易。

  • 0 回复 lei kou
    TI__Mastermind 25020 points

    插一句，Pinmux tool使用起来还是比较简单的，这个在进行AM335x的设计中，还是挺重要的，如果你不熟悉，建议你照着这个链接中的指导使用一下，这样后面再面对这种问题的时候就会比较容易处理了。

    http://processors.wiki.ti.com/index.php/Pin_Mux_Utility_for_ARM_MPU_Processors