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Commit 68737043 authored by Philip Rakity's avatar Philip Rakity Committed by Chris Ball
Browse files

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: default avatarPhilip Rakity <prakity@marvell.com>
Signed-off-by: default avatarChris Ball <cjb@laptop.org>
parent 0aa67700

drivers/mmc/host/sdhci.c

+17 −0
Original line number Diff line number Diff line
@@ -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