linux-kernel - [RFC PATCH 2/4] mmc: core: add mmc-sleep-awake caps

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Date:   Mon, 20 Feb 2017 13:33:10 +0530
From:   Ritesh Harjani <riteshh@...eaurora.org>
To:     ulf.hansson@...aro.org, linux-mmc@...r.kernel.org,
        adrian.hunter@...el.com
Cc:     shawn.lin@...k-chips.com, devicetree@...r.kernel.org,
        andy.gross@...aro.org, linux-arm-msm@...r.kernel.org,
        georgi.djakov@...aro.org, alex.lemberg@...disk.com,
        mateusz.nowak@...el.com, Yuliy.Izrailov@...disk.com,
        asutoshd@...eaurora.org, david.griego@...aro.org,
        stummala@...eaurora.org, venkatg@...eaurora.org,
        pramod.gurav@...aro.org, jeremymc@...hat.com,
        linux-kernel@...r.kernel.org,
        Ritesh Harjani <riteshh@...eaurora.org>
Subject: [RFC PATCH 2/4] mmc: core: add mmc-sleep-awake caps

This patch introduce mmc-sleep-awake for platforms
which want to enable CMD5 awake & partial_init.

Signed-off-by: Ritesh Harjani <riteshh@...eaurora.org>
---
 drivers/mmc/core/host.c  | 2 ++
 include/linux/mmc/host.h | 1 +
 2 files changed, 3 insertions(+)

diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c
index 3f8c85d..e798814 100644
--- a/drivers/mmc/core/host.c
+++ b/drivers/mmc/core/host.c
@@ -320,6 +320,8 @@ int mmc_of_parse(struct mmc_host *host)
 		host->caps2 |= MMC_CAP2_NO_SD;
 	if (of_property_read_bool(np, "no-mmc"))
 		host->caps2 |= MMC_CAP2_NO_MMC;
+	if (of_property_read_bool(np, "mmc-sleep-awake"))
+		host->caps2 |= MMC_CAP2_SLEEP_AWAKE;
 
 	host->dsr_req = !of_property_read_u32(np, "dsr", &host->dsr);
 	if (host->dsr_req && (host->dsr & ~0xffff)) {
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index 83f1c4a..df7882b 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -303,6 +303,7 @@ struct mmc_host {
 #define MMC_CAP2_HS400_ES	(1 << 20)	/* Host supports enhanced strobe */
 #define MMC_CAP2_NO_SD		(1 << 21)	/* Do not send SD commands during initialization */
 #define MMC_CAP2_NO_MMC		(1 << 22)	/* Do not send (e)MMC commands during initialization */
+#define MMC_CAP2_SLEEP_AWAKE	(1 << 23)	/* Use Sleep/Awake (CMD5) */
 
 	mmc_pm_flag_t		pm_caps;	/* supported pm features */
 
-- 
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