Write Protect:

static unsigned int esdhc_pltfm_get_ro(struct sdhci_host *host)
{
        struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
        struct pltfm_imx_data *imx_data = pltfm_host->priv;
        struct esdhc_platform_data *boarddata = &imx_data->boarddata;

        switch (boarddata->wp_type) {
        case ESDHC_WP_GPIO:
                return mmc_gpio_get_ro(host->mmc);
        case ESDHC_WP_CONTROLLER:
                return !(readl(host->ioaddr + SDHCI_PRESENT_STATE) &
                               SDHCI_WRITE_PROTECT);
        case ESDHC_WP_NONE:
                break;
        }

        return -ENOSYS;
}

.....

        if (of_get_property(np, "fsl,wp-controller", NULL))
                boarddata->wp_type = ESDHC_WP_CONTROLLER;

 
        boarddata->wp_gpio = of_get_named_gpio(np, "wp-gpios", 0);
        if (gpio_is_valid(boarddata->wp_gpio))
                boarddata->wp_type = ESDHC_WP_GPIO;

.....

CD PIN:

        switch (boarddata->cd_type) {
        case ESDHC_CD_GPIO:
                err = mmc_gpio_request_cd(host->mmc, boarddata->cd_gpio);
                if (err) {
                        dev_err(mmc_dev(host->mmc),
                                "failed to request card-detect gpio!\n");
                        goto disable_clk;
                }
                /* fall through */

        case ESDHC_CD_CONTROLLER:
                /* we have a working card_detect back */
                host->quirks &= ~SDHCI_QUIRK_BROKEN_CARD_DETECTION;
                break;

        case ESDHC_CD_PERMANENT:
                host->mmc->caps |= MMC_CAP_NONREMOVABLE;
                break;

        case ESDHC_CD_NONE:
                break;
        }

....
        if (of_get_property(np, "non-removable", NULL))
                boarddata->cd_type = ESDHC_CD_PERMANENT;

        if (of_get_property(np, "fsl,cd-controller", NULL))
                boarddata->cd_type = ESDHC_CD_CONTROLLER;
        ....

        boarddata->cd_gpio = of_get_named_gpio(np, "cd-gpios", 0);
        if (gpio_is_valid(boarddata->cd_gpio))
                boarddata->cd_type = ESDHC_CD_GPIO;