[RFC PATCH V3 20/21] mmc: sdhci-uhs2: add post-mmc_attach_sd hook

[Ben Chuang <benchuanggli@gmail.com>]

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

This "post" hook for mmc_attach_sd(), uhs2_post_attach_sd, will be required
to enable UHS-II support, at least, on GL9755.

Signed-off-by: Ben Chuang <ben.chuang@genesyslogic.com.tw>
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
---
 drivers/mmc/host/sdhci.c | 9 +++++++++
 drivers/mmc/host/sdhci.h | 1 +
 2 files changed, 10 insertions(+)

diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 5d84e61f6ad9..a2cc5f758547 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -3155,6 +3155,14 @@ static void sdhci_uhs2_enable_clk(struct mmc_host *mmc)
 		udelay(10);
 	}
 }
+
+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);
+}
 #endif /* CONFIG_MMC_SDHCI_UHS2 */
 
 static const struct mmc_host_ops sdhci_ops = {
@@ -3177,6 +3185,7 @@ 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,
 #endif /* CONFIG_MMC_SDHCI_UHS2 */
 };
 
diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
index c825a8130bc1..d613ff8daaf6 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -723,6 +723,7 @@ struct sdhci_ops {
 	void    (*dump_vendor_regs)(struct sdhci_host *host);
 	/* UHS-2 support */
 	void    (*uhs2_pre_detect_init)(struct sdhci_host *host);
+	void    (*uhs2_post_attach_sd)(struct sdhci_host *host);
 };
 
 struct sdhci_uhs2_ops {
-- 
2.27.0