Initial signal voltage ?

[Joakim Tjernlund <joakim.tjernlund@transmode.se>]

in mmc_power_up() we have:
	/* Try to set signal voltage to 3.3V but fall back to 1.8v or 1.2v */
	if (__mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330) == 0)
		dev_err(mmc_dev(host), "Initial signal voltage of 3.3v\n");
	else if (__mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180) == 0)
		dev_err(mmc_dev(host), "Initial signal voltage of 1.8v\n");
	else if (__mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120) == 0)
		dev_err(mmc_dev(host), "Initial signal voltage of 1.2v\n");

Here one jut brutally tries to set the initial power to 3.3 but nowhere in
general code there is a check if the controller can handle this w.r.t
HOST CAPS.
Where should this check be performed, I am guessing either here or in sdhci?
This is all new to me so I am just throwing this out there

 Jocke