linux-kernel - [RFC PATCH V3 16/21] mmc: sdhci: UHS-II support, export helper functions to a module

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Message-Id: <20200710111215.29779-1-benchuanggli@gmail.com>
Date:   Fri, 10 Jul 2020 19:12:15 +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,
        ben.chuang@...esyslogic.com.tw, takahiro.akashi@...aro.org,
        greg.tu@...esyslogic.com.tw, Ben Chuang <benchuanggli@...il.com>
Subject: [RFC PATCH V3 16/21] mmc: sdhci: UHS-II support, export helper functions to a module

From: AKASHI Takahiro <takahiro.akashi@...aro.org>

Those exported functions will be utilized in the following commit
to implement UHS-II support as a kernel module.

Signed-off-by: Ben Chuang <ben.chuang@...esyslogic.com.tw>
Signed-off-by: AKASHI Takahiro <takahiro.akashi@...aro.org>
---
 drivers/mmc/host/sdhci.c | 14 ++++++++------
 drivers/mmc/host/sdhci.h | 10 ++++++++++
 2 files changed, 18 insertions(+), 6 deletions(-)

diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index ca3d4a506e01..5d84e61f6ad9 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -57,8 +57,6 @@ EXPORT_SYMBOL_GPL(sdhci_uhs2_ops);
 static unsigned int debug_quirks = 0;
 static unsigned int debug_quirks2;
 
-static void sdhci_enable_preset_value(struct sdhci_host *host, bool enable);
-
 static bool sdhci_send_command(struct sdhci_host *host, struct mmc_command *cmd);
 
 void sdhci_dumpregs(struct sdhci_host *host)
@@ -225,13 +223,14 @@ static void sdhci_runtime_pm_bus_on(struct sdhci_host *host)
 	pm_runtime_get_noresume(host->mmc->parent);
 }
 
-static void sdhci_runtime_pm_bus_off(struct sdhci_host *host)
+void sdhci_runtime_pm_bus_off(struct sdhci_host *host)
 {
 	if (!host->bus_on)
 		return;
 	host->bus_on = false;
 	pm_runtime_put_noidle(host->mmc->parent);
 }
+EXPORT_SYMBOL_GPL(sdhci_runtime_pm_bus_off);
 
 void sdhci_reset(struct sdhci_host *host, u8 mask)
 {
@@ -1560,12 +1559,13 @@ static void __sdhci_finish_mrq(struct sdhci_host *host, struct mmc_request *mrq)
 		sdhci_led_deactivate(host);
 }
 
-static void sdhci_finish_mrq(struct sdhci_host *host, struct mmc_request *mrq)
+void sdhci_finish_mrq(struct sdhci_host *host, struct mmc_request *mrq)
 {
 	__sdhci_finish_mrq(host, mrq);
 
 	queue_work(host->complete_wq, &host->complete_work);
 }
+EXPORT_SYMBOL_GPL(sdhci_finish_mrq);
 
 static void __sdhci_finish_data(struct sdhci_host *host, bool sw_data_timeout)
 {
@@ -1644,10 +1644,11 @@ static void __sdhci_finish_data(struct sdhci_host *host, bool sw_data_timeout)
 	}
 }
 
-static void sdhci_finish_data(struct sdhci_host *host)
+void sdhci_finish_data(struct sdhci_host *host)
 {
 	__sdhci_finish_data(host, false);
 }
+EXPORT_SYMBOL_GPL(sdhci_finish_data);
 
 static bool sdhci_send_command(struct sdhci_host *host, struct mmc_command *cmd)
 {
@@ -2991,7 +2992,7 @@ int sdhci_execute_tuning(struct mmc_host *mmc, u32 opcode)
 }
 EXPORT_SYMBOL_GPL(sdhci_execute_tuning);
 
-static void sdhci_enable_preset_value(struct sdhci_host *host, bool enable)
+void sdhci_enable_preset_value(struct sdhci_host *host, bool enable)
 {
 	/* Host Controller v3.00 defines preset value registers */
 	if (host->version < SDHCI_SPEC_300)
@@ -3019,6 +3020,7 @@ static void sdhci_enable_preset_value(struct sdhci_host *host, bool enable)
 		host->preset_enabled = enable;
 	}
 }
+EXPORT_SYMBOL_GPL(sdhci_enable_preset_value);
 
 static void sdhci_post_req(struct mmc_host *mmc, struct mmc_request *mrq,
 				int err)
diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
index f6732f33f29f..927aaba28932 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -893,4 +893,14 @@ void sdhci_switch_external_dma(struct sdhci_host *host, bool en);
 void sdhci_set_data_timeout_irq(struct sdhci_host *host, bool enable);
 void __sdhci_set_timeout(struct sdhci_host *host, struct mmc_command *cmd);
 
+/* sdhci_uhs2.c needed */
+void sdhci_enable_preset_value(struct sdhci_host *host, bool enable);
+void sdhci_finish_data(struct sdhci_host *host);
+void sdhci_set_power(struct sdhci_host *host, unsigned char mode,
+		     unsigned short vdd, unsigned short vdd2);
+void sdhci_set_power_noreg(struct sdhci_host *host, unsigned char mode,
+			   unsigned short vdd, unsigned short vdd2);
+void sdhci_runtime_pm_bus_off(struct sdhci_host *host);
+void sdhci_finish_mrq(struct sdhci_host *host, struct mmc_request *mrq);
+
 #endif /* __SDHCI_HW_H */
-- 
2.27.0