linux-kernel - [PATCH V16 20/23] mmc: sdhci-uhs2: add pre-detect

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Message-Id: <20240522110909.10060-21-victorshihgli@gmail.com>
Date: Wed, 22 May 2024 19:09:06 +0800
From: Victor Shih <victorshihgli@...il.com>
To: ulf.hansson@...aro.org,
	adrian.hunter@...el.com
Cc: linux-mmc@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	benchuanggli@...il.com,
	HL.Liu@...esyslogic.com.tw,
	Greg.tu@...esyslogic.com.tw,
	takahiro.akashi@...aro.org,
	dlunev@...omium.org,
	Victor Shih <victorshihgli@...il.com>,
	Ben Chuang <ben.chuang@...esyslogic.com.tw>
Subject: [PATCH V16 20/23] mmc: sdhci-uhs2: add pre-detect_init hook

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

This "pre" hook for detect_init(), uhs2_pre_detect_init, 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>
Acked-by: Adrian Hunter <adrian.hunter@...el.com>
---
 drivers/mmc/host/sdhci-uhs2.c | 3 +++
 drivers/mmc/host/sdhci.h      | 1 +
 2 files changed, 4 insertions(+)

diff --git a/drivers/mmc/host/sdhci-uhs2.c b/drivers/mmc/host/sdhci-uhs2.c
index 30a8f6b7d275..c830ee352504 100644
--- a/drivers/mmc/host/sdhci-uhs2.c
+++ b/drivers/mmc/host/sdhci-uhs2.c
@@ -417,6 +417,9 @@ static int sdhci_uhs2_do_detect_init(struct mmc_host *mmc)
 
 	DBG("Begin do uhs2 detect init.\n");
 
+	if (host->ops && host->ops->uhs2_pre_detect_init)
+		host->ops->uhs2_pre_detect_init(host);
+
 	if (sdhci_uhs2_interface_detect(host)) {
 		pr_warn("%s: cannot detect UHS2 interface.\n", mmc_hostname(host->mmc));
 		return -EIO;
diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
index 03148c7ea614..576b8de2c04e 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -725,6 +725,7 @@ struct sdhci_ops {
 				struct mmc_request *mrq);
 	void    (*dump_vendor_regs)(struct sdhci_host *host);
 	void	(*dump_uhs2_regs)(struct sdhci_host *host);
+	void    (*uhs2_pre_detect_init)(struct sdhci_host *host);
 };
 
 #ifdef CONFIG_MMC_SDHCI_IO_ACCESSORS
-- 
2.25.1