Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

UClinux PPS driver

Hi everyone,

Have anyone used the PPS driver on the uClinux? I would like to know what I need in term of the HDL design or a megafunction I can purchase so I can interface with this driver? Thanks in advance if anyone can share your experience using this driver on the uClinux.

Thanks.

1 Reply

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    12 years ago

    I still have no luck on the PPS client driver on my uClinux running on the NIOS2. Can anyone kindly point me to the right direction, since I am using a device tree and believe this doesn't support device tree, right? What do I need to add/modify so I can use a input GPIO as a source? I saw a google post to add this code to (?? an unknown) and then you need to call pps_init in the configuration routine (?? not sure what it mean)

    add

    /* PPS-GPIO platform data */

    static struct pps_gpio_platform_data pps_gpio_info = {

    .assert_falling_edge = false,

    .capture_clear= false,

    .gpio_pin=63,

    .gpio_label="PPS",

    };

    static struct platform_device pps_gpio_device = {

    .name = "pps-gpio",

    .id = -1,

    .dev = {

    .platform_data = &pps_gpio_info

    },

    };

    static void pps_init(int evm_id, int profile)

    {

    int err;

    err = platform_device_register(&pps_gpio_device);

    if (err) {

    pr_warning("Could not register PPS_GPIO device");

    }

    }

    Thanks in advance for any help