ASoC: OMAP: ams-delta: drop .set_bias_level callback

This functionality has already been implemented in the cx20442 codec
driver (commit f75a8ff67d161b5166a2c2360bb2ffaefd5eb853, "ASoC: cx20442:
add bias control over a platform provided regulator"), no need to keep
it here duplicated.

Once done, remove the no longer used AMS_DELTA_LATCH2_MODEM_NRESET
symbol from the board header file and a call to the regulator_toggle()
helper function from the old API wrapper found in the board file.  While
being at it, simplify the way the modem .pm callback handles the
regulator and drop that helper function and its related consumer setup
completely.

Depends on patches 1/3 and 2/3 for clean apply and keep things working.

Signed-off-by: Janusz Krzysztofik <jkrzyszt@tis.icnet.pl>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: Tony Lindgren <tony@atomide.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

1 files changed, 7 insertions, 35 deletions

diff --git a/arch/arm/mach-omap1/board-ams-delta.c b/arch/arm/mach-omap1/board-ams-delta.c
index 2fb2cbb1e105..cb6afe670468 100644
--- a/arch/arm/mach-omap1/board-ams-delta.c
+++ b/arch/arm/mach-omap1/board-ams-delta.c
@@ -18,7 +18,6 @@
 #include <linux/input.h>
 #include <linux/interrupt.h>
 #include <linux/leds.h>
-#include <linux/mutex.h>
 #include <linux/platform_device.h>
 #include <linux/regulator/consumer.h>
 #include <linux/regulator/fixed.h>
@@ -291,35 +290,8 @@ static struct platform_device modem_nreset_device = {
 
 struct modem_private_data {
 	struct regulator *regulator;
-	struct {
-		struct mutex lock;
-		bool enabled;
-	} consumer;
 };
 
-static int regulator_toggle(struct modem_private_data *priv, bool enable)
-{
-	int err = 0;
-
-	mutex_lock(&priv->consumer.lock);
-	if (IS_ERR(priv->regulator)) {
-		err = PTR_ERR(priv->regulator);
-	} else if (enable) {
-		if (!priv->consumer.enabled) {
-			err = regulator_enable(priv->regulator);
-			priv->consumer.enabled = true;
-		}
-	} else {
-		if (priv->consumer.enabled) {
-			err = regulator_disable(priv->regulator);
-			priv->consumer.enabled = false;
-		}
-	}
-	mutex_unlock(&priv->consumer.lock);
-
-	return err;
-}
-
 static struct modem_private_data modem_priv;
 
 void ams_delta_latch_write(int base, int ngpio, u16 mask, u16 value)
@@ -330,8 +302,6 @@ void ams_delta_latch_write(int base, int ngpio, u16 mask, u16 value)
 	for (; bit < ngpio; bit++, bitpos = bitpos << 1) {
 		if (!(mask & bitpos))
 			continue;
-		else if (base + bit == AMS_DELTA_GPIO_PIN_MODEM_NRESET)
-			regulator_toggle(&modem_priv, (value & bitpos) != 0);
 		else
 			gpio_set_value(base + bit, (value & bitpos) != 0);
 	}
@@ -530,10 +500,16 @@ static void modem_pm(struct uart_port *port, unsigned int state, unsigned old)
 {
 	struct modem_private_data *priv = port->private_data;
 
+	if (IS_ERR(priv->regulator))
+		return;
+
 	if (state == old)
 		return;
 
-	regulator_toggle(priv, state == 0);
+	if (state == 0)
+		regulator_enable(priv->regulator);
+	else if (old == 0)
+		regulator_disable(priv->regulator);
 }
 
 static struct plat_serial8250_port ams_delta_modem_ports[] = {
@@ -593,7 +569,6 @@ static int __init late_init(void)
 	gpio_direction_input(AMS_DELTA_GPIO_PIN_MODEM_IRQ);
 
 	/* Initialize the modem_nreset regulator consumer before use */
-	mutex_init(&modem_priv.consumer.lock);
 	modem_priv.regulator = ERR_PTR(-ENODEV);
 
 	ams_delta_latch2_write(AMS_DELTA_LATCH2_MODEM_CODEC,
@@ -606,9 +581,6 @@ static int __init late_init(void)
 	/*
 	 * Once the modem device is registered, the modem_nreset
 	 * regulator can be requested on behalf of that device.
-	 * In addition to the modem .pm callback, that regulator
-	 * is still used via the ams_delta_latch_write() wrapper
-	 * by the ASoC driver until updated.
 	 */
 	modem_priv.regulator = regulator_get(&ams_delta_modem_device.dev,
 			"RESET#");