MFD: twl6040: Fix power on GPIO handling

Avoid requesting the audpwron gpio in case of ES1.0
revision.
In the past we requested the gpio, but we did not
free it up, since we made the check for the revision
later. This results later checks for gpio validity to
fail, leaving the gpio reserved (even after the driver
has been removed).
Signed-off-by: NPeter Ujfalusi <peter.ujfalusi@ti.com>
Acked-by: NSamuel Ortiz <sameo@linux.intel.com>
Acked-by: NLiam Girdwood <lrg@ti.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

drivers/mfd/twl6040-core.c

@@ -470,7 +470,6 @@ static int __devinit twl6040_probe(struct platform_device *pdev)
 	platform_set_drvdata(pdev, twl6040);
 
 	twl6040->dev = &pdev->dev;
-	twl6040->audpwron = pdata->audpwron_gpio;
 	twl6040->irq = pdata->naudint_irq;
 	twl6040->irq_base = pdata->irq_base;
 
@@ -480,6 +479,12 @@ static int __devinit twl6040_probe(struct platform_device *pdev)
 
 	twl6040->rev = twl6040_reg_read(twl6040, TWL6040_REG_ASICREV);
 
+	/* ERRATA: Automatic power-up is not possible in ES1.0 */
+	if (twl6040_get_revid(twl6040) > TWL6040_REV_ES1_0)
+		twl6040->audpwron = pdata->audpwron_gpio;
+	else
+		twl6040->audpwron = -EINVAL;
+
 	if (gpio_is_valid(twl6040->audpwron)) {
 		ret = gpio_request(twl6040->audpwron, "audpwron");
 		if (ret)
@@ -490,10 +495,6 @@ static int __devinit twl6040_probe(struct platform_device *pdev)
 			goto gpio2_err;
 	}
 
-	/* ERRATA: Automatic power-up is not possible in ES1.0 */
-	if (twl6040_get_revid(twl6040) == TWL6040_REV_ES1_0)
-		twl6040->audpwron = -EINVAL;
-
 	/* codec interrupt */
 	ret = twl6040_irq_init(twl6040);
 	if (ret)