static void sdhci_set_power(struct sdhci_host *host, unsigned char mode,
1224                             unsigned short vdd)
1225 {
1226         u8 pwr = 0;
1227 
1228         if (mode != MMC_POWER_OFF) {
1229                 switch (1 << vdd) {
1230                 case MMC_VDD_165_195:
1231                         pwr = SDHCI_POWER_180;
1232                         break;
1233                 case MMC_VDD_29_30:
1234                 case MMC_VDD_30_31:
1235                         pwr = SDHCI_POWER_300;
1236                         break;
1237                 case MMC_VDD_32_33:
1238                 case MMC_VDD_33_34:
1239                         pwr = SDHCI_POWER_330;
1240                         break;
1241                 default:
1242                         BUG();
1243                 }
1244         }
1245 
1246         if (host->pwr == pwr)
1247                 return;
1248 
1249         host->pwr = pwr;
1250 
1251         if (pwr == 0) {
1252                 sdhci_writeb(host, 0, SDHCI_POWER_CONTROL);
1253                 if (host->quirks2 & SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON)
1254                         sdhci_runtime_pm_bus_off(host);
1255                 vdd = 0;
1256         } else {
1257                 /*
1258                  * Spec says that we should clear the power reg before setting
1259                  * a new value. Some controllers don't seem to like this though.
1260                  */
1261                 if (!(host->quirks & SDHCI_QUIRK_SINGLE_POWER_WRITE))
1262                         sdhci_writeb(host, 0, SDHCI_POWER_CONTROL);
1263 
1264                 /*
1265                  * At least the Marvell CaFe chip gets confused if we set the
1266                  * voltage and set turn on power at the same time, so set the
1267                  * voltage first.
1268                  */
1269                 if (host->quirks & SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER)
1270                         sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL);
1271 
1272                 pwr |= SDHCI_POWER_ON;
1273 
1274                 sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL);
1275 
1276                 if (host->quirks2 & SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON)
1277                         sdhci_runtime_pm_bus_on(host);
1278 
1279                 /*
1280                  * Some controllers need an extra 10ms delay of 10ms before
1281                  * they can apply clock after applying power
1282                  */
1283                 if (host->quirks & SDHCI_QUIRK_DELAY_AFTER_POWER)
1284                         mdelay(10);
1285         }
1286 
1287         if (host->vmmc) {
1288                 spin_unlock_irq(&host->lock);
1289                 mmc_regulator_set_ocr(host->mmc, host->vmmc, vdd);
1290                 spin_lock_irq(&host->lock);
1291         }
1292 }
1293