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From: Shawn Lin <shawn.lin@rock-chips.com>
To: Ulf Hansson <ulf.hansson@linaro.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>,
	Rob Herring <robh+dt@kernel.org>,
	linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org,
	Heiko Stuebner <heiko@sntech.de>,
	linux-rockchip@lists.infradead.org, devicetree@vger.kernel.org,
	Shawn Lin <shawn.lin@rock-chips.com>
Subject: [PATCH v3 2/5] mmc: core: add mmc-hs400-enhanced-strobe support
Date: Tue, 10 May 2016 17:09:43 +0800	[thread overview]
Message-ID: <1462871383-32443-1-git-send-email-shawn.lin@rock-chips.com> (raw)
In-Reply-To: <1462871343-32361-1-git-send-email-shawn.lin@rock-chips.com>

This patch introduce mmc-hs400-enhanced-strobe for platforms
which want to enable enhanced strobe function from DT if the
mmc host controller claims to support enhanced strobe.

Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>

---

Changes in v3:
- remove helper function and shorten cap2 to MMC_CAP2_HS400_ES
- rename callback to hs400_enhanced_strobe and make it return void
- add enhanced_strobe in mmc_ios and pass it to hs400_enhanced_strobe
- disable host's enhanced strobe in mmc_set_initial_state
- remove bus checking after switching hs400es
- add new function for hs400es timing selection
- fix wrong judgement of mmc_card_hs400es

Changes in v2:
- switch to HS400ES from Highspeed mode directly

 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 e0a3ee1..45773e4 100644
--- a/drivers/mmc/core/host.c
+++ b/drivers/mmc/core/host.c
@@ -289,6 +289,8 @@ int mmc_of_parse(struct mmc_host *host)
 		host->caps2 |= MMC_CAP2_HS400_1_8V | MMC_CAP2_HS200_1_8V_SDR;
 	if (of_property_read_bool(np, "mmc-hs400-1_2v"))
 		host->caps2 |= MMC_CAP2_HS400_1_2V | MMC_CAP2_HS200_1_2V_SDR;
+	if (of_property_read_bool(np, "mmc-hs400-enhanced-strobe"))
+		host->caps2 |= MMC_CAP2_HS400_ES;
 
 	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 85800b4..2a06fb0 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -302,6 +302,7 @@ struct mmc_host {
 #define MMC_CAP2_SDIO_IRQ_NOTHREAD (1 << 17)
 #define MMC_CAP2_NO_WRITE_PROTECT (1 << 18)	/* No physical write protect pin, assume that card is always read-write */
 #define MMC_CAP2_NO_SDIO	(1 << 19)	/* Do not send SDIO commands during initialization */
+#define MMC_CAP2_HS400_ES	(1 << 20)	/* Host supports enhanced strobe */
 
 	mmc_pm_flag_t		pm_caps;	/* supported pm features */
 
-- 
2.3.7

WARNING: multiple messages have this Message-ID (diff)
From: Shawn Lin <shawn.lin-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
To: Ulf Hansson <ulf.hansson-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
Cc: devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	Heiko Stuebner <heiko-4mtYJXux2i+zQB+pC5nmwQ@public.gmane.org>,
	Shawn Lin <shawn.lin-TNX95d0MmH7DzftRWevZcw@public.gmane.org>,
	linux-mmc-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	Adrian Hunter
	<adrian.hunter-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-rockchip-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
	Rob Herring <robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Subject: [PATCH v3 2/5] mmc: core: add mmc-hs400-enhanced-strobe support
Date: Tue, 10 May 2016 17:09:43 +0800	[thread overview]
Message-ID: <1462871383-32443-1-git-send-email-shawn.lin@rock-chips.com> (raw)
In-Reply-To: <1462871343-32361-1-git-send-email-shawn.lin-TNX95d0MmH7DzftRWevZcw@public.gmane.org>

This patch introduce mmc-hs400-enhanced-strobe for platforms
which want to enable enhanced strobe function from DT if the
mmc host controller claims to support enhanced strobe.

Signed-off-by: Shawn Lin <shawn.lin-TNX95d0MmH7DzftRWevZcw@public.gmane.org>

---

Changes in v3:
- remove helper function and shorten cap2 to MMC_CAP2_HS400_ES
- rename callback to hs400_enhanced_strobe and make it return void
- add enhanced_strobe in mmc_ios and pass it to hs400_enhanced_strobe
- disable host's enhanced strobe in mmc_set_initial_state
- remove bus checking after switching hs400es
- add new function for hs400es timing selection
- fix wrong judgement of mmc_card_hs400es

Changes in v2:
- switch to HS400ES from Highspeed mode directly

 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 e0a3ee1..45773e4 100644
--- a/drivers/mmc/core/host.c
+++ b/drivers/mmc/core/host.c
@@ -289,6 +289,8 @@ int mmc_of_parse(struct mmc_host *host)
 		host->caps2 |= MMC_CAP2_HS400_1_8V | MMC_CAP2_HS200_1_8V_SDR;
 	if (of_property_read_bool(np, "mmc-hs400-1_2v"))
 		host->caps2 |= MMC_CAP2_HS400_1_2V | MMC_CAP2_HS200_1_2V_SDR;
+	if (of_property_read_bool(np, "mmc-hs400-enhanced-strobe"))
+		host->caps2 |= MMC_CAP2_HS400_ES;
 
 	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 85800b4..2a06fb0 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -302,6 +302,7 @@ struct mmc_host {
 #define MMC_CAP2_SDIO_IRQ_NOTHREAD (1 << 17)
 #define MMC_CAP2_NO_WRITE_PROTECT (1 << 18)	/* No physical write protect pin, assume that card is always read-write */
 #define MMC_CAP2_NO_SDIO	(1 << 19)	/* Do not send SDIO commands during initialization */
+#define MMC_CAP2_HS400_ES	(1 << 20)	/* Host supports enhanced strobe */
 
 	mmc_pm_flag_t		pm_caps;	/* supported pm features */
 
-- 
2.3.7

  parent reply	other threads:[~2016-05-10  9:10 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-05-10  9:09 [PATCH v3 0/5] Add enhanced strobe support for emmc version 5.1 or later Shawn Lin
2016-05-10  9:09 ` Shawn Lin
2016-05-10  9:09 ` Shawn Lin
2016-05-10  9:09 ` [PATCH v3 1/5] Documentation: mmc: add mmc-hs400-enhanced-strobe Shawn Lin
2016-05-10  9:09 ` Shawn Lin [this message]
2016-05-10  9:09   ` [PATCH v3 2/5] mmc: core: add mmc-hs400-enhanced-strobe support Shawn Lin
2016-05-10  9:09 ` [PATCH v3 3/5] mmc: core: implement enhanced strobe support Shawn Lin
2016-05-10  9:09   ` Shawn Lin
2016-05-20  0:18   ` Doug Anderson
2016-05-20  1:48     ` Shawn Lin
2016-05-20  1:48       ` Shawn Lin
2016-05-20  2:19       ` Doug Anderson
2016-05-20  2:45   ` Jaehoon Chung
2016-05-20  3:15     ` Shawn Lin
2016-05-20  3:54       ` Jaehoon Chung
2016-05-20  4:15         ` Shawn Lin
2016-05-10  9:09 ` [PATCH v3 4/5] mmc: debugfs: add HS400 enhanced strobe description Shawn Lin
2016-05-10  9:09   ` Shawn Lin
2016-05-10  9:10 ` [PATCH v3 5/5] mmc: sdhci-of-arasan: implement enhanced strobe callback Shawn Lin
2016-05-10  9:10   ` Shawn Lin
2016-05-20  0:11   ` Doug Anderson
2016-05-20  1:49     ` Shawn Lin
2016-05-20  1:49       ` Shawn Lin

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