1266 static void sdhci_set_power(struct sdhci_host *host, unsigned char mode,
1267                             unsigned short vdd)
1268 {
1269         struct mmc_host *mmc = host->mmc;
1270         u8 pwr = 0;
1271 
1272         if (!IS_ERR(mmc->supply.vmmc)) {
1273                 spin_unlock_irq(&host->lock);
1274                 mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd);
1275                 spin_lock_irq(&host->lock);
1276 
1277                 if (mode != MMC_POWER_OFF)
1278                         sdhci_writeb(host, SDHCI_POWER_ON, SDHCI_POWER_CONTROL);
1279                 else
1280                         sdhci_writeb(host, 0, SDHCI_POWER_CONTROL);
1281 
1282                 return;
1283         }
1284 
1285         if (mode != MMC_POWER_OFF) {
1286                 switch (1 << vdd) {
1287                 case MMC_VDD_165_195:
1288                         pwr = SDHCI_POWER_180;
1289                         break;
1290                 case MMC_VDD_29_30:
1291                 case MMC_VDD_30_31:
1292                         pwr = SDHCI_POWER_300;
1293                         break;
1294                 case MMC_VDD_32_33:
1295                 case MMC_VDD_33_34:
1296                         pwr = SDHCI_POWER_330;
1297                         break;
1298                 default:
1299                         BUG();
1300                 }
1301         }
1302 
1303         if (host->pwr == pwr)
1304                 return;
1305 
1306         host->pwr = pwr;
1307 
1308         if (pwr == 0) {
1309                 sdhci_writeb(host, 0, SDHCI_POWER_CONTROL);
1310                 if (host->quirks2 & SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON)
1311                         sdhci_runtime_pm_bus_off(host);
1312                 vdd = 0;
1313         } else {
1314                 /*
1315                  * Spec says that we should clear the power reg before setting
1316                  * a new value. Some controllers don't seem to like this though.
1317                  */
1318                 if (!(host->quirks & SDHCI_QUIRK_SINGLE_POWER_WRITE))
1319                         sdhci_writeb(host, 0, SDHCI_POWER_CONTROL);
1320 
1321                 /*
1322                  * At least the Marvell CaFe chip gets confused if we set the
1323                  * voltage and set turn on power at the same time, so set the
1324                  * voltage first.
1325                  */
1326                 if (host->quirks & SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER)
1327                         sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL);
1328 
1329                 pwr |= SDHCI_POWER_ON;
1330 
1331                 sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL);
1332 
1333                 if (host->quirks2 & SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON)
1334                         sdhci_runtime_pm_bus_on(host);
1335 
1336                 /*
1337                  * Some controllers need an extra 10ms delay of 10ms before
1338                  * they can apply clock after applying power
1339                  */
1340                 if (host->quirks & SDHCI_QUIRK_DELAY_AFTER_POWER)
1341                         mdelay(10);
1342         }
1343 }
1344