linux-kernel - [RFC PATCH v2 4/6] mmc: uhs2: Introduce a uhs2_post_attach

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Message-Id: <974a2a211fa97a885ffbdedbb8d596cd4cb57e80.1578560282.git.benchuanggli@gmail.com>
Date:   Thu,  9 Jan 2020 17:14:53 +0800
From:   Ben Chuang <benchuanggli@...il.com>
To:     adrian.hunter@...el.com, ulf.hansson@...aro.org
Cc:     linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org,
        greg.tu@...esyslogic.com.tw, ben.chuang@...esyslogic.com.tw,
        Ben Chuang <benchuanggli@...il.com>
Subject: [RFC PATCH v2 4/6] mmc: uhs2: Introduce a uhs2_post_attach_sd function

From: Ben Chuang <ben.chuang@...esyslogic.com.tw>

Introduce a uhs2_post_attach_sd function after attach_sd on
UHS-II mode.

Signed-off-by: Ben Chuang <ben.chuang@...esyslogic.com.tw>
---
 drivers/mmc/core/uhs2.c       | 5 ++++-
 drivers/mmc/host/sdhci-core.c | 9 +++++++++
 drivers/mmc/host/sdhci.h      | 1 +
 include/linux/mmc/host.h      | 1 +
 4 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/core/uhs2.c b/drivers/mmc/core/uhs2.c
index 43ea155ccc59..99aeeccd88e5 100644
--- a/drivers/mmc/core/uhs2.c
+++ b/drivers/mmc/core/uhs2.c
@@ -935,8 +935,11 @@ int mmc_uhs2_try_frequency(struct mmc_host *host, unsigned int freq)
 	 */
 	err = mmc_attach_sd(host, true);
 
-	if (!err)
+	if (!err) {
+		if (host->ops->uhs2_post_attach_sd)
+			host->ops->uhs2_post_attach_sd(host);
 		return 0;
+	}
 
 init_fail:
 	mmc_power_off(host);
diff --git a/drivers/mmc/host/sdhci-core.c b/drivers/mmc/host/sdhci-core.c
index 82184684f963..d7b2535a847a 100644
--- a/drivers/mmc/host/sdhci-core.c
+++ b/drivers/mmc/host/sdhci-core.c
@@ -2778,6 +2778,14 @@ void sdhci_uhs2_enable_clk(struct mmc_host *mmc)
 }
 EXPORT_SYMBOL_GPL(sdhci_uhs2_enable_clk);
 
+static void sdhci_uhs2_post_attach_sd(struct mmc_host *mmc)
+{
+	struct sdhci_host *host = mmc_priv(mmc);
+
+	if (host->ops && host->ops->uhs2_post_attach_sd)
+		host->ops->uhs2_post_attach_sd(host);
+}
+
 static const struct mmc_host_ops sdhci_ops = {
 	.request	= sdhci_request,
 	.post_req	= sdhci_post_req,
@@ -2797,6 +2805,7 @@ static const struct mmc_host_ops sdhci_ops = {
 	.uhs2_set_reg		= sdhci_uhs2_set_reg,
 	.uhs2_disable_clk	= sdhci_uhs2_disable_clk,
 	.uhs2_enable_clk	= sdhci_uhs2_enable_clk,
+	.uhs2_post_attach_sd    = sdhci_uhs2_post_attach_sd,
 };
 
 /*****************************************************************************\
diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
index 2f7732f4bb75..7f779ac81931 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -906,6 +906,7 @@ struct sdhci_ops {
 	void	(*voltage_switch)(struct sdhci_host *host);
 	void	(*adma_write_desc)(struct sdhci_host *host, void **desc,
 				   dma_addr_t addr, int len, unsigned int cmd);
+	void    (*uhs2_post_attach_sd)(struct sdhci_host *host);
 };
 
 #ifdef CONFIG_MMC_SDHCI_IO_ACCESSORS
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index 3d6a7c9b534f..ed4ebe6bf68a 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -177,6 +177,7 @@ struct mmc_host_ops {
 	int	(*uhs2_set_reg)(struct mmc_host *host, enum uhs2_act act);
 	void    (*uhs2_disable_clk)(struct mmc_host *host);
 	void    (*uhs2_enable_clk)(struct mmc_host *host);
+	void    (*uhs2_post_attach_sd)(struct mmc_host *host);
 };
 
 struct mmc_cqe_ops {
-- 
2.24.1