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mmc: sdhci: check voltage range only on regulators aware of voltage value 

Some regulators don't report any voltage values, so checking supported
voltage range results in disabling all SDHCI_CAN_VDD_* flags and
registration failure. This patch finally provides a correct fix for the
registration of SDHCI driver with all possible voltage regulators:
dummy, fixed and regulated without using regulator_count_voltages()
hacks.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
This commit is contained in:
Marek Szyprowski 2013-02-12 09:01:36 +01:00 committed by Chris Ball
parent 29866a98be
commit a4f8f257ed
1 changed files with 5 additions and 1 deletions
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6
drivers/mmc/host/sdhci.c
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@ -2976,7 +2976,11 @@ int sdhci_add_host(struct sdhci_host *host)
}
#ifdef CONFIG_REGULATOR
if (host->vmmc) {
/*
* Voltage range check makes sense only if regulator reports
* any voltage value.
*/
if (host->vmmc && regulator_get_voltage(host->vmmc) > 0) {
ret = regulator_is_supported_voltage(host->vmmc, 2700000,
3600000);
if ((ret <= 0) || (!(caps[0] & SDHCI_CAN_VDD_330)))