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From: Vincent Yang <vincent.yang.fujitsu@gmail.com>
To: linux-mmc@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Cc: ulf.hansson@linaro.org, andy.green@linaro.org,
	linux@arm.linux.org.uk, patches@linaro.org, chris@printf.net,
	Vincent Yang <Vincent.Yang@tw.fujitsu.com>,
	jaswinder.singh@linaro.org
Subject: [PATCH v3 1/4] mmc: sdhci: add a voltage switch callback function
Date: Fri,  9 Jan 2015 19:41:42 +0800	[thread overview]
Message-ID: <1420803705-4539-2-git-send-email-Vincent.Yang@tw.fujitsu.com> (raw)
In-Reply-To: <1420803705-4539-1-git-send-email-Vincent.Yang@tw.fujitsu.com>

This patch adds a callback function to do
controller-specific actions when switching voltages.
It is a preparation and will be used by Fujitsu
SDHCI controller f_sdh30 driver.

Signed-off-by: Vincent Yang <Vincent.Yang@tw.fujitsu.com>
---
 drivers/mmc/host/sdhci.c | 4 ++++
 drivers/mmc/host/sdhci.h | 1 +
 2 files changed, 5 insertions(+)

diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index cbb245b..cd1f311 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -1827,6 +1827,10 @@ static int sdhci_do_start_signal_voltage_switch(struct sdhci_host *host,
 		ctrl |= SDHCI_CTRL_VDD_180;
 		sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2);
 
+		/* Some controller need to do more when switching */
+		if (host->ops->voltage_switch)
+			host->ops->voltage_switch(host);
+
 		/* 1.8V regulator output should be stable within 5 ms */
 		ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
 		if (ctrl & SDHCI_CTRL_VDD_180)
diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
index 41a2c34..0315e18 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -339,6 +339,7 @@ struct sdhci_ops {
 	void    (*adma_workaround)(struct sdhci_host *host, u32 intmask);
 	void	(*platform_init)(struct sdhci_host *host);
 	void    (*card_event)(struct sdhci_host *host);
+	void	(*voltage_switch)(struct sdhci_host *host);
 };
 
 #ifdef CONFIG_MMC_SDHCI_IO_ACCESSORS
-- 
1.9.0

WARNING: multiple messages have this Message-ID (diff)
From: vincent.yang.fujitsu@gmail.com (Vincent Yang)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v3 1/4] mmc: sdhci: add a voltage switch callback function
Date: Fri,  9 Jan 2015 19:41:42 +0800	[thread overview]
Message-ID: <1420803705-4539-2-git-send-email-Vincent.Yang@tw.fujitsu.com> (raw)
In-Reply-To: <1420803705-4539-1-git-send-email-Vincent.Yang@tw.fujitsu.com>

This patch adds a callback function to do
controller-specific actions when switching voltages.
It is a preparation and will be used by Fujitsu
SDHCI controller f_sdh30 driver.

Signed-off-by: Vincent Yang <Vincent.Yang@tw.fujitsu.com>
---
 drivers/mmc/host/sdhci.c | 4 ++++
 drivers/mmc/host/sdhci.h | 1 +
 2 files changed, 5 insertions(+)

diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index cbb245b..cd1f311 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -1827,6 +1827,10 @@ static int sdhci_do_start_signal_voltage_switch(struct sdhci_host *host,
 		ctrl |= SDHCI_CTRL_VDD_180;
 		sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2);
 
+		/* Some controller need to do more when switching */
+		if (host->ops->voltage_switch)
+			host->ops->voltage_switch(host);
+
 		/* 1.8V regulator output should be stable within 5 ms */
 		ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
 		if (ctrl & SDHCI_CTRL_VDD_180)
diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
index 41a2c34..0315e18 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -339,6 +339,7 @@ struct sdhci_ops {
 	void    (*adma_workaround)(struct sdhci_host *host, u32 intmask);
 	void	(*platform_init)(struct sdhci_host *host);
 	void    (*card_event)(struct sdhci_host *host);
+	void	(*voltage_switch)(struct sdhci_host *host);
 };
 
 #ifdef CONFIG_MMC_SDHCI_IO_ACCESSORS
-- 
1.9.0

  reply	other threads:[~2015-01-09 11:41 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-01-09 11:41 [PATCH v3 0/4] mmc: sdhci: adding support for a new Fujitsu sdhci IP Vincent Yang
2015-01-09 11:41 ` Vincent Yang
2015-01-09 11:41 ` Vincent Yang [this message]
2015-01-09 11:41   ` [PATCH v3 1/4] mmc: sdhci: add a voltage switch callback function Vincent Yang
2015-01-09 11:41 ` [PATCH v3 2/4] mmc: sdhci: add a quirk for tuning work around Vincent Yang
2015-01-09 11:41   ` Vincent Yang
2015-01-09 11:41 ` [PATCH v3 3/4] mmc: sdhci: add a quirk for single block transactions Vincent Yang
2015-01-09 11:41   ` Vincent Yang
2015-01-09 11:41 ` [PATCH v3 4/4] mmc: sdhci: host: add new f_sdh30 Vincent Yang
2015-01-09 11:41   ` Vincent Yang
2015-01-13 12:19   ` Ulf Hansson
2015-01-13 12:19     ` Ulf Hansson
2015-01-16  3:33     ` Vincent Yang
2015-01-16  3:33       ` Vincent Yang
2015-01-16  8:36       ` Ulf Hansson
2015-01-16  8:36         ` Ulf Hansson
2015-01-16 17:09         ` Vincent Yang
2015-01-16 17:09           ` Vincent Yang

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