This patch defines a quirk for platforms unable
to enable 3.0V support.
It is a preparation and will be used by Fujitsu
SDHCI controller f_sdh30 driver.
Signed-off-by: Vincent Yang <vincent.y...@tw.fujitsu.com>
---
drivers/mmc/host/sdhci.c | 3 +++
include/linux/mmc/sdhci.h | 2 ++
2 files changed, 5 insertions(+)
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 47055f3..523075f 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -3069,6 +3069,9 @@ int sdhci_add_host(struct sdhci_host *host)
}
#endif /* CONFIG_REGULATOR */
+ if (host->quirks2 & SDHCI_QUIRK2_NO_3_0_V)
+ caps[0] &= ~SDHCI_CAN_VDD_300;
+
/*
* 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
diff --git a/include/linux/mmc/sdhci.h b/include/linux/mmc/sdhci.h
index 08abe99..cac0958 100644
--- a/include/linux/mmc/sdhci.h
+++ b/include/linux/mmc/sdhci.h
@@ -98,6 +98,8 @@ struct sdhci_host {
#define SDHCI_QUIRK2_BROKEN_HS200 (1<<6)
/* Controller does not support DDR50 */
#define SDHCI_QUIRK2_BROKEN_DDR50 (1<<7)
+/* The system physically doesn't support 3.0v, even if the host does */
+#define SDHCI_QUIRK2_NO_3_0_V (1<<8)
int irq; /* Device IRQ */
void __iomem *ioaddr; /* Mapped address */
--
1.9.0
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