From: Ohad Ben-Cohen <o...@wizery.com>
To allow the usage of MMC_VDD_165_195, host capability
MMC_CAP_VDD_165_195 is introduced. This is necessary
because MMC_VDD_165_195 is currently reserved/undefined.
Signed-off-by: Ohad Ben-Cohen <o...@wizery.com>
---
drivers/mmc/core/sdio.c | 7 +++++++
include/linux/mmc/host.h | 1 +
2 files changed, 8 insertions(+), 0 deletions(-)
diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c
index cdb845b..a9f3ed6 100644
--- a/drivers/mmc/core/sdio.c
+++ b/drivers/mmc/core/sdio.c
@@ -494,6 +494,13 @@ int mmc_attach_sdio(struct mmc_host *host, u32 ocr)
ocr &= ~0x7F;
}
+ if ((ocr & MMC_VDD_165_195) && !(host->caps & MMC_CAP_VDD_165_195)) {
+ printk(KERN_WARNING "%s: SDIO card claims to support the "
+ "incompletely defined 'low voltage range'. This "
+ "will be ignored.\n", mmc_hostname(host));
+ ocr &= ~MMC_VDD_165_195;
+ }
+
host->ocr = mmc_select_voltage(host, ocr);
/*
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index 81bb423..5fa95b3 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -150,6 +150,7 @@ struct mmc_host {
#define MMC_CAP_DISABLE (1 << 7) /* Can the host be
disabled */
#define MMC_CAP_NONREMOVABLE (1 << 8) /* Nonremovable e.g. eMMC */
#define MMC_CAP_WAIT_WHILE_BUSY (1 << 9) /* Waits while card is
busy */
+#define MMC_CAP_VDD_165_195 (1 << 10) /* Accepts MMC_VDD_165_195 */
/* host specific block data */
unsigned int max_seg_size; /* see
blk_queue_max_segment_size */
--
1.5.4.3
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