> +static void tmio_mmc_reset(struct tmio_mmc_host *host)
> +{
> +	/* FIXME - should we set stop clock reg here */
> +	sd_ctrl_write16(host, CTL_RESET_SD, 0x0000);
> +	sd_ctrl_write16(host, CTL_RESET_SDIO, 0x0000);
> +	usleep_range(10000, 11000);
> +	sd_ctrl_write16(host, CTL_RESET_SD, 0x0001);
> +	sd_ctrl_write16(host, CTL_RESET_SDIO, 0x0001);
> +	usleep_range(10000, 11000);
> +
> +	if (host->pdata->flags & TMIO_MMC_SDIO_IRQ) {
> +		sd_ctrl_write16(host, CTL_SDIO_IRQ_MASK, host->sdio_irq_mask);
> +		sd_ctrl_write16(host, CTL_TRANSACTION_CTL, 0x0001);
> +	}
> +}

Yes, looks much safer now.

> +	host->reset = tmio_mmc_reset;

So, you populate the new pointer here...

> +	if (!_host->reset)
> +		_host->reset = tmio_mmc_reset;

... and here. But it seems never used anywhere? Or am I missing
something?