1 files changed, 15 insertions, 124 deletions

diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 21cda23b247c..1a36b021b44e 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -187,8 +187,6 @@ void mmc_request_done(struct mmc_host *host, struct mmc_request *mrq)
 
 		if (mrq->done)
 			mrq->done(mrq);
-
-		mmc_host_clk_release(host);
 	}
 }
 
@@ -292,7 +290,6 @@ static int mmc_start_request(struct mmc_host *host, struct mmc_request *mrq)
 			mrq->stop->mrq = mrq;
 		}
 	}
-	mmc_host_clk_hold(host);
 	led_trigger_event(host->led, LED_FULL);
 	__mmc_start_request(host, mrq);
 
@@ -542,11 +539,8 @@ static void mmc_wait_for_req_done(struct mmc_host *host,
 static void mmc_pre_req(struct mmc_host *host, struct mmc_request *mrq,
 		 bool is_first_req)
 {
-	if (host->ops->pre_req) {
-		mmc_host_clk_hold(host);
+	if (host->ops->pre_req)
 		host->ops->pre_req(host, mrq, is_first_req);
-		mmc_host_clk_release(host);
-	}
 }
 
 /**
@@ -561,11 +555,8 @@ static void mmc_pre_req(struct mmc_host *host, struct mmc_request *mrq,
 static void mmc_post_req(struct mmc_host *host, struct mmc_request *mrq,
 			 int err)
 {
-	if (host->ops->post_req) {
-		mmc_host_clk_hold(host);
+	if (host->ops->post_req)
 		host->ops->post_req(host, mrq, err);
-		mmc_host_clk_release(host);
-	}
 }
 
 /**
@@ -850,9 +841,9 @@ void mmc_set_data_timeout(struct mmc_data *data, const struct mmc_card *card)
 		unsigned int timeout_us, limit_us;
 
 		timeout_us = data->timeout_ns / 1000;
-		if (mmc_host_clk_rate(card->host))
+		if (card->host->ios.clock)
 			timeout_us += data->timeout_clks * 1000 /
-				(mmc_host_clk_rate(card->host) / 1000);
+				(card->host->ios.clock / 1000);
 
 		if (data->flags & MMC_DATA_WRITE)
 			/*
@@ -1050,8 +1041,6 @@ static inline void mmc_set_ios(struct mmc_host *host)
 		 ios->power_mode, ios->chip_select, ios->vdd,
 		 ios->bus_width, ios->timing);
 
-	if (ios->clock > 0)
-		mmc_set_ungated(host);
 	host->ops->set_ios(host, ios);
 }
 
@@ -1060,17 +1049,15 @@ static inline void mmc_set_ios(struct mmc_host *host)
  */
 void mmc_set_chip_select(struct mmc_host *host, int mode)
 {
-	mmc_host_clk_hold(host);
 	host->ios.chip_select = mode;
 	mmc_set_ios(host);
-	mmc_host_clk_release(host);
 }
 
 /*
  * Sets the host clock to the highest possible frequency that
  * is below "hz".
  */
-static void __mmc_set_clock(struct mmc_host *host, unsigned int hz)
+void mmc_set_clock(struct mmc_host *host, unsigned int hz)
 {
 	WARN_ON(hz && hz < host->f_min);
 
@@ -1081,68 +1068,6 @@ static void __mmc_set_clock(struct mmc_host *host, unsigned int hz)
 	mmc_set_ios(host);
 }
 
-void mmc_set_clock(struct mmc_host *host, unsigned int hz)
-{
-	mmc_host_clk_hold(host);
-	__mmc_set_clock(host, hz);
-	mmc_host_clk_release(host);
-}
-
-#ifdef CONFIG_MMC_CLKGATE
-/*
- * This gates the clock by setting it to 0 Hz.
- */
-void mmc_gate_clock(struct mmc_host *host)
-{
-	unsigned long flags;
-
-	spin_lock_irqsave(&host->clk_lock, flags);
-	host->clk_old = host->ios.clock;
-	host->ios.clock = 0;
-	host->clk_gated = true;
-	spin_unlock_irqrestore(&host->clk_lock, flags);
-	mmc_set_ios(host);
-}
-
-/*
- * This restores the clock from gating by using the cached
- * clock value.
- */
-void mmc_ungate_clock(struct mmc_host *host)
-{
-	/*
-	 * We should previously have gated the clock, so the clock shall
-	 * be 0 here! The clock may however be 0 during initialization,
-	 * when some request operations are performed before setting
-	 * the frequency. When ungate is requested in that situation
-	 * we just ignore the call.
-	 */
-	if (host->clk_old) {
-		BUG_ON(host->ios.clock);
-		/* This call will also set host->clk_gated to false */
-		__mmc_set_clock(host, host->clk_old);
-	}
-}
-
-void mmc_set_ungated(struct mmc_host *host)
-{
-	unsigned long flags;
-
-	/*
-	 * We've been given a new frequency while the clock is gated,
-	 * so make sure we regard this as ungating it.
-	 */
-	spin_lock_irqsave(&host->clk_lock, flags);
-	host->clk_gated = false;
-	spin_unlock_irqrestore(&host->clk_lock, flags);
-}
-
-#else
-void mmc_set_ungated(struct mmc_host *host)
-{
-}
-#endif
-
 int mmc_execute_tuning(struct mmc_card *card)
 {
 	struct mmc_host *host = card->host;
@@ -1157,9 +1082,7 @@ int mmc_execute_tuning(struct mmc_card *card)
 	else
 		opcode = MMC_SEND_TUNING_BLOCK;
 
-	mmc_host_clk_hold(host);
 	err = host->ops->execute_tuning(host, opcode);
-	mmc_host_clk_release(host);
 
 	if (err)
 		pr_err("%s: tuning execution failed\n", mmc_hostname(host));
@@ -1174,10 +1097,8 @@ int mmc_execute_tuning(struct mmc_card *card)
  */
 void mmc_set_bus_mode(struct mmc_host *host, unsigned int mode)
 {
-	mmc_host_clk_hold(host);
 	host->ios.bus_mode = mode;
 	mmc_set_ios(host);
-	mmc_host_clk_release(host);
 }
 
 /*
@@ -1185,10 +1106,8 @@ void mmc_set_bus_mode(struct mmc_host *host, unsigned int mode)
  */
 void mmc_set_bus_width(struct mmc_host *host, unsigned int width)
 {
-	mmc_host_clk_hold(host);
 	host->ios.bus_width = width;
 	mmc_set_ios(host);
-	mmc_host_clk_release(host);
 }
 
 /*
@@ -1532,11 +1451,8 @@ int __mmc_set_signal_voltage(struct mmc_host *host, int signal_voltage)
 	int old_signal_voltage = host->ios.signal_voltage;
 
 	host->ios.signal_voltage = signal_voltage;
-	if (host->ops->start_signal_voltage_switch) {
-		mmc_host_clk_hold(host);
+	if (host->ops->start_signal_voltage_switch)
 		err = host->ops->start_signal_voltage_switch(host, &host->ios);
-		mmc_host_clk_release(host);
-	}
 
 	if (err)
 		host->ios.signal_voltage = old_signal_voltage;
@@ -1570,20 +1486,17 @@ int mmc_set_signal_voltage(struct mmc_host *host, int signal_voltage, u32 ocr)
 		pr_warn("%s: cannot verify signal voltage switch\n",
 			mmc_hostname(host));
 
-	mmc_host_clk_hold(host);
-
 	cmd.opcode = SD_SWITCH_VOLTAGE;
 	cmd.arg = 0;
 	cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
 
 	err = mmc_wait_for_cmd(host, &cmd, 0);
 	if (err)
-		goto err_command;
+		return err;
+
+	if (!mmc_host_is_spi(host) && (cmd.resp[0] & R1_ERROR))
+		return -EIO;
 
-	if (!mmc_host_is_spi(host) && (cmd.resp[0] & R1_ERROR)) {
-		err = -EIO;
-		goto err_command;
-	}
 	/*
 	 * The card should drive cmd and dat[0:3] low immediately
 	 * after the response of cmd11, but wait 1 ms to be sure
@@ -1632,9 +1545,6 @@ power_cycle:
 		mmc_power_cycle(host, ocr);
 	}
 
-err_command:
-	mmc_host_clk_release(host);
-
 	return err;
 }
 
@@ -1643,10 +1553,8 @@ err_command:
  */
 void mmc_set_timing(struct mmc_host *host, unsigned int timing)
 {
-	mmc_host_clk_hold(host);
 	host->ios.timing = timing;
 	mmc_set_ios(host);
-	mmc_host_clk_release(host);
 }
 
 /*
@@ -1654,10 +1562,8 @@ void mmc_set_timing(struct mmc_host *host, unsigned int timing)
  */
 void mmc_set_driver_type(struct mmc_host *host, unsigned int drv_type)
 {
-	mmc_host_clk_hold(host);
 	host->ios.drv_type = drv_type;
 	mmc_set_ios(host);
-	mmc_host_clk_release(host);
 }
 
 int mmc_select_drive_strength(struct mmc_card *card, unsigned int max_dtr,
@@ -1665,7 +1571,6 @@ int mmc_select_drive_strength(struct mmc_card *card, unsigned int max_dtr,
 {
 	struct mmc_host *host = card->host;
 	int host_drv_type = SD_DRIVER_TYPE_B;
-	int drive_strength;
 
 	*drv_type = 0;
 
@@ -1688,14 +1593,10 @@ int mmc_select_drive_strength(struct mmc_card *card, unsigned int max_dtr,
 	 * information and let the hardware specific code
 	 * return what is possible given the options
 	 */
-	mmc_host_clk_hold(host);
-	drive_strength = host->ops->select_drive_strength(card, max_dtr,
-							  host_drv_type,
-							  card_drv_type,
-							  drv_type);
-	mmc_host_clk_release(host);
-
-	return drive_strength;
+	return host->ops->select_drive_strength(card, max_dtr,
+						host_drv_type,
+						card_drv_type,
+						drv_type);
 }
 
 /*
@@ -1714,8 +1615,6 @@ void mmc_power_up(struct mmc_host *host, u32 ocr)
 	if (host->ios.power_mode == MMC_POWER_ON)
 		return;
 
-	mmc_host_clk_hold(host);
-
 	mmc_pwrseq_pre_power_on(host);
 
 	host->ios.vdd = fls(ocr) - 1;
@@ -1749,8 +1648,6 @@ void mmc_power_up(struct mmc_host *host, u32 ocr)
 	 * time required to reach a stable voltage.
 	 */
 	mmc_delay(10);
-
-	mmc_host_clk_release(host);
 }
 
 void mmc_power_off(struct mmc_host *host)
@@ -1758,8 +1655,6 @@ void mmc_power_off(struct mmc_host *host)
 	if (host->ios.power_mode == MMC_POWER_OFF)
 		return;
 
-	mmc_host_clk_hold(host);
-
 	mmc_pwrseq_power_off(host);
 
 	host->ios.clock = 0;
@@ -1775,8 +1670,6 @@ void mmc_power_off(struct mmc_host *host)
 	 * can be successfully turned on again.
 	 */
 	mmc_delay(1);
-
-	mmc_host_clk_release(host);
 }
 
 void mmc_power_cycle(struct mmc_host *host, u32 ocr)
@@ -1992,7 +1885,7 @@ static unsigned int mmc_mmc_erase_timeout(struct mmc_card *card,
 		 */
 		timeout_clks <<= 1;
 		timeout_us += (timeout_clks * 1000) /
-			      (mmc_host_clk_rate(card->host) / 1000);
+			      (card->host->ios.clock / 1000);
 
 		erase_timeout = timeout_us / 1000;
 
@@ -2440,9 +2333,7 @@ static void mmc_hw_reset_for_init(struct mmc_host *host)
 {
 	if (!(host->caps & MMC_CAP_HW_RESET) || !host->ops->hw_reset)
 		return;
-	mmc_host_clk_hold(host);
 	host->ops->hw_reset(host);
-	mmc_host_clk_release(host);
 }
 
 int mmc_hw_reset(struct mmc_host *host)