linux-kernel - [PATCH 1/4] mmc: core: Export API to allow hosts to get the card address

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Date:   Mon, 24 Apr 2017 13:41:55 -0500
From:   "Steven J. Hill" <steven.hill@...ium.com>
To:     Ulf Hansson <ulf.hansson@...aro.org>
Cc:     David Daney <david.daney@...ium.com>,
        Jan Glauber <jglauber@...ium.com>, linux-mmc@...r.kernel.org,
        linux-mips@...ux-mips.org, linux-kernel@...r.kernel.org
Subject: [PATCH 1/4] mmc: core: Export API to allow hosts to get the card address

From: Ulf Hansson <ulf.hansson@...aro.org>

Some hosts controllers, like Cavium, needs to know whether the card
operates in byte- or block-address mode. Therefore export a new API,
mmc_card_is_blockaddr(), which provides this information.

Signed-off-by: Ulf Hansson <ulf.hansson@...aro.org>
Signed-off-by: Steven J. Hill <Steven.Hill@...ium.com>
Acked-by: David Daney <david.daney@...ium.com>
---
 drivers/mmc/core/core.c  | 6 ++++++
 include/linux/mmc/card.h | 2 ++
 2 files changed, 8 insertions(+)

diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 926e0fd..f9fae34 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -2555,6 +2555,12 @@ unsigned int mmc_calc_max_discard(struct mmc_card *card)
 }
 EXPORT_SYMBOL(mmc_calc_max_discard);
 
+bool mmc_card_is_blockaddr(struct mmc_card *card)
+{
+       return card ? mmc_card_blockaddr(card) : false;
+}
+EXPORT_SYMBOL(mmc_card_is_blockaddr);
+
 int mmc_set_blocklen(struct mmc_card *card, unsigned int blocklen)
 {
 	struct mmc_command cmd = {};
diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h
index 77e61e0..4cd9450 100644
--- a/include/linux/mmc/card.h
+++ b/include/linux/mmc/card.h
@@ -307,6 +307,8 @@ static inline bool mmc_large_sector(struct mmc_card *card)
 	return card->ext_csd.data_sector_size == 4096;
 }
 
+bool mmc_card_is_blockaddr(struct mmc_card *card);
+
 #define mmc_card_mmc(c)		((c)->type == MMC_TYPE_MMC)
 #define mmc_card_sd(c)		((c)->type == MMC_TYPE_SD)
 #define mmc_card_sdio(c)	((c)->type == MMC_TYPE_SDIO)
-- 
2.1.4