linux-kernel - [RFC PATCH v3.2 24/29] mmc: core: add post-mmc_attach

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Message-Id: <20210722040124.7573-24-jasonlai.genesyslogic@gmail.com>
Date:   Thu, 22 Jul 2021 12:01:19 +0800
From:   Jason Lai <jasonlai.genesyslogic@...il.com>
To:     ulf.hansson@...aro.org, adrian.hunter@...el.com
Cc:     linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org,
        ben.chuang@...esyslogic.com.tw, greg.tu@...esyslogic.com.tw,
        jason.lai@...esyslogiv.com.tw,
        AKASHI Takahiro <takahiro.akashi@...aro.org>
Subject: [RFC PATCH v3.2 24/29] mmc: core: add post-mmc_attach_sd hook

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

Signed-off-by: Ben Chuang <ben.chuang@...esyslogic.com.tw>
Signed-off-by: AKASHI Takahiro <takahiro.akashi@...aro.org>
---
 drivers/mmc/core/sd.c    | 6 ++++++
 include/linux/mmc/host.h | 1 +
 2 files changed, 7 insertions(+)

diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c
index 0a407ef1cfc0..f984d5a9301a 100644
--- a/drivers/mmc/core/sd.c
+++ b/drivers/mmc/core/sd.c
@@ -1417,6 +1417,12 @@ int mmc_attach_sd(struct mmc_host *host)
 		goto remove_card;

 	mmc_claim_host(host);
+
+	/* TODO: Is this the right place? */
+	if ((host->flags & MMC_UHS2_INITIALIZED) &&
+	    host->ops->uhs2_post_attach_sd)
+		host->ops->uhs2_post_attach_sd(host);
+
 	return 0;

 remove_card:
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index 89a9e0e12f07..ef613b3c9af2 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -199,6 +199,7 @@ 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 {
--
2.32.0