linux-kernel - [PATCH 2/2] mmc: sdhci: add DDR50 1.8V mode support for BayTrail eMMC Controller

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Message-Id: <1404817861-23359-3-git-send-email-mauricex.r.petallo@intel.com>
Date:	Tue,  8 Jul 2014 19:11:01 +0800
From:	Maurice Petallo <mauricex.r.petallo@...el.com>
To:	Chris Ball <chris@...ntf.net>
Cc:	linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org,
	Adrian Hunter <adrian.hunter@...el.com>,
	Maurice Petallo <mauricex.r.petallo@...el.com>
Subject: [PATCH 2/2] mmc: sdhci: add DDR50 1.8V mode support for BayTrail eMMC Controller

This is to enable DDR50 bus speed mode with 1.8V signaling capability
for BayTrail ACPI and PCI mode eMMC Controller.

Signed-off-by: Maurice Petallo <mauricex.r.petallo@...el.com>
Acked-by: Adrian Hunter <adrian.hunter@...el.com>
---
 drivers/mmc/host/sdhci-acpi.c | 3 ++-
 drivers/mmc/host/sdhci-pci.c  | 2 +-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/mmc/host/sdhci-acpi.c b/drivers/mmc/host/sdhci-acpi.c
index 840788e..8c53370 100644
--- a/drivers/mmc/host/sdhci-acpi.c
+++ b/drivers/mmc/host/sdhci-acpi.c
@@ -124,7 +124,8 @@ static const struct sdhci_acpi_chip sdhci_acpi_chip_int = {
 
 static const struct sdhci_acpi_slot sdhci_acpi_slot_int_emmc = {
 	.chip    = &sdhci_acpi_chip_int,
-	.caps    = MMC_CAP_8_BIT_DATA | MMC_CAP_NONREMOVABLE | MMC_CAP_HW_RESET,
+	.caps    = MMC_CAP_8_BIT_DATA | MMC_CAP_NONREMOVABLE |
+		   MMC_CAP_HW_RESET | MMC_CAP_1_8V_DDR,
 	.caps2   = MMC_CAP2_HC_ERASE_SZ,
 	.flags   = SDHCI_ACPI_RUNTIME_PM,
 	.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN,
diff --git a/drivers/mmc/host/sdhci-pci.c b/drivers/mmc/host/sdhci-pci.c
index 7514cc7..89bd721 100644
--- a/drivers/mmc/host/sdhci-pci.c
+++ b/drivers/mmc/host/sdhci-pci.c
@@ -264,7 +264,7 @@ static void sdhci_pci_int_hw_reset(struct sdhci_host *host)
 static int byt_emmc_probe_slot(struct sdhci_pci_slot *slot)
 {
 	slot->host->mmc->caps |= MMC_CAP_8_BIT_DATA | MMC_CAP_NONREMOVABLE |
-				 MMC_CAP_HW_RESET;
+				 MMC_CAP_HW_RESET | MMC_CAP_1_8V_DDR;
 	slot->host->mmc->caps2 |= MMC_CAP2_HC_ERASE_SZ;
 	slot->hw_reset = sdhci_pci_int_hw_reset;
 	return 0;
-- 
1.8.1.4

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