diff options
| author | Philip Rakity <prakity@marvell.com> | 2012-06-08 12:26:13 -0700 |
|---|---|---|
| committer | Chris Ball <cjb@laptop.org> | 2012-07-21 00:02:24 -0400 |
| commit | 68737043bb155b42d54943d25153b901fd16e535 (patch) | |
| tree | ff60fb287c75717b7e5521f89d09688c5ef13189 /drivers/mmc | |
| parent | 0aa6770000bafa65c17cf44b6619d328d4fc79b3 (diff) | |
| download | lwn-68737043bb155b42d54943d25153b901fd16e535.tar.gz lwn-68737043bb155b42d54943d25153b901fd16e535.zip | |
mmc: only support voltage (vdd) that regulator agrees with
If we are using a regulator the SD Host Controller and the
regulator should agree about the voltages supported. Use
the common subset that is supported.
Signed-off-by: Philip Rakity <prakity@marvell.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/host/sdhci.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index 8f61f8d6e0ca..f76736b50bc7 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -2844,6 +2844,23 @@ int sdhci_add_host(struct sdhci_host *host) host->vmmc = NULL; } +#ifdef CONFIG_REGULATOR + if (host->vmmc) { + ret = regulator_is_supported_voltage(host->vmmc, 3300000, + 3300000); + if ((ret <= 0) || (!(caps[0] & SDHCI_CAN_VDD_330))) + caps[0] &= ~SDHCI_CAN_VDD_330; + ret = regulator_is_supported_voltage(host->vmmc, 3000000, + 3000000); + if ((ret <= 0) || (!(caps[0] & SDHCI_CAN_VDD_300))) + caps[0] &= ~SDHCI_CAN_VDD_300; + ret = regulator_is_supported_voltage(host->vmmc, 1800000, + 1800000); + if ((ret <= 0) || (!(caps[0] & SDHCI_CAN_VDD_180))) + caps[0] &= ~SDHCI_CAN_VDD_180; + } +#endif /* CONFIG_REGULATOR */ + /* * According to SD Host Controller spec v3.00, if the Host System * can afford more than 150mA, Host Driver should set XPC to 1. Also |