forked from Minki/linux
mmc: sdhci: Use regulator min/max voltage range according to spec
For regulator vmmc/vmmcq, use voltage range as below 3.3v/3.0v: (2.7v, 3.6v) 1.8v: (1.7v, 1.95v) Original code uses the precise value which may fail in regulator driver if it does NOT support the precise voltage. Signed-off-by: Jialing Fu <jlfu@marvell.com> Signed-off-by: Kevin Liu <kliu5@marvell.com> Tested-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Chris Ball <cjb@laptop.org>
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@ -1618,7 +1618,7 @@ static int sdhci_do_3_3v_signal_voltage_switch(struct sdhci_host *host,
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sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2);
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if (host->vqmmc) {
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ret = regulator_set_voltage(host->vqmmc, 3300000, 3300000);
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ret = regulator_set_voltage(host->vqmmc, 2700000, 3600000);
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if (ret) {
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pr_warning("%s: Switching to 3.3V signalling voltage "
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" failed\n", mmc_hostname(host->mmc));
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@ -1662,7 +1662,7 @@ static int sdhci_do_1_8v_signal_voltage_switch(struct sdhci_host *host,
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*/
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if (host->vqmmc)
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ret = regulator_set_voltage(host->vqmmc,
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1800000, 1800000);
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1700000, 1950000);
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else
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ret = 0;
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@ -2860,8 +2860,8 @@ int sdhci_add_host(struct sdhci_host *host)
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}
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} else {
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regulator_enable(host->vqmmc);
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if (!regulator_is_supported_voltage(host->vqmmc, 1800000,
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1800000))
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if (!regulator_is_supported_voltage(host->vqmmc, 1700000,
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1950000))
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caps[1] &= ~(SDHCI_SUPPORT_SDR104 |
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SDHCI_SUPPORT_SDR50 |
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SDHCI_SUPPORT_DDR50);
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@ -2925,16 +2925,14 @@ int sdhci_add_host(struct sdhci_host *host)
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#ifdef CONFIG_REGULATOR
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if (host->vmmc) {
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ret = regulator_is_supported_voltage(host->vmmc, 3300000,
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3300000);
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ret = regulator_is_supported_voltage(host->vmmc, 2700000,
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3600000);
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if ((ret <= 0) || (!(caps[0] & SDHCI_CAN_VDD_330)))
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caps[0] &= ~SDHCI_CAN_VDD_330;
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ret = regulator_is_supported_voltage(host->vmmc, 3000000,
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3000000);
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if ((ret <= 0) || (!(caps[0] & SDHCI_CAN_VDD_300)))
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caps[0] &= ~SDHCI_CAN_VDD_300;
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ret = regulator_is_supported_voltage(host->vmmc, 1800000,
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1800000);
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ret = regulator_is_supported_voltage(host->vmmc, 1700000,
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1950000);
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if ((ret <= 0) || (!(caps[0] & SDHCI_CAN_VDD_180)))
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caps[0] &= ~SDHCI_CAN_VDD_180;
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}
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