[ARM] 5083/2: Tosa: fix IrDA transciver powerup.

On tosa the tranciver LED isn't powered down if
the GPIO47 (STUART_TX) isn't configured as low-level.
Power it down if IrDA is off to save a bit of power.

Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

2 files changed, 47 insertions, 12 deletions

diff --git a/arch/arm/mach-pxa/tosa.c b/arch/arm/mach-pxa/tosa.c
index 9892464d7abc..7a89f764acf3 100644
--- a/arch/arm/mach-pxa/tosa.c
+++ b/arch/arm/mach-pxa/tosa.c
@@ -117,10 +117,6 @@ static unsigned long tosa_pin_config[] = {
         GPIO44_BTUART_CTS,
         GPIO45_BTUART_RTS,
 
-        /* IrDA */
-        GPIO46_STUART_RXD,
-        GPIO47_STUART_TXD,
-
         /* Keybd */
         GPIO58_GPIO | MFP_LPM_DRIVE_LOW,
         GPIO59_GPIO | MFP_LPM_DRIVE_LOW,
@@ -147,6 +143,17 @@ static unsigned long tosa_pin_config[] = {
         GPIO83_SSP2_TXD,
 };
 
+static unsigned long tosa_pin_irda_off[] = {
+        GPIO46_STUART_RXD,
+        GPIO47_GPIO | MFP_LPM_DRIVE_LOW,
+};
+
+static unsigned long tosa_pin_irda_on[] = {
+        GPIO46_STUART_RXD,
+        GPIO47_STUART_TXD,
+};
+
+
 /*
  * SCOOP Device
  */
@@ -341,29 +348,55 @@ static struct pxamci_platform_data tosa_mci_platform_data = {
 /*
  * Irda
  */
+static void tosa_irda_transceiver_mode(struct device *dev, int mode)
+{
+        if (mode & IR_OFF) {
+                gpio_set_value(TOSA_GPIO_IR_POWERDWN, 0);
+                pxa2xx_mfp_config(ARRAY_AND_SIZE(tosa_pin_irda_off));
+                gpio_direction_output(TOSA_GPIO_IRDA_TX, 0);
+        } else {
+                pxa2xx_mfp_config(ARRAY_AND_SIZE(tosa_pin_irda_on));
+                gpio_set_value(TOSA_GPIO_IR_POWERDWN, 1);
+        }
+}
+
 static int tosa_irda_startup(struct device *dev)
 {
         int ret;
 
+        ret = gpio_request(TOSA_GPIO_IRDA_TX, "IrDA TX");
+        if (ret)
+                goto err_tx;
+        ret = gpio_direction_output(TOSA_GPIO_IRDA_TX, 0);
+        if (ret)
+                goto err_tx_dir;
+
         ret = gpio_request(TOSA_GPIO_IR_POWERDWN, "IrDA powerdown");
         if (ret)
-                return ret;
+                goto err_pwr;
 
         ret = gpio_direction_output(TOSA_GPIO_IR_POWERDWN, 0);
         if (ret)
-                gpio_free(TOSA_GPIO_IR_POWERDWN);
+                goto err_pwr_dir;
 
-        return ret;
-        }
+        tosa_irda_transceiver_mode(dev, IR_SIRMODE | IR_OFF);
 
-static void tosa_irda_shutdown(struct device *dev)
-{
+        return 0;
+
+err_pwr_dir:
         gpio_free(TOSA_GPIO_IR_POWERDWN);
+err_pwr:
+err_tx_dir:
+        gpio_free(TOSA_GPIO_IRDA_TX);
+err_tx:
+        return ret;
 }
 
-static void tosa_irda_transceiver_mode(struct device *dev, int mode)
+static void tosa_irda_shutdown(struct device *dev)
 {
-        gpio_set_value(TOSA_GPIO_IR_POWERDWN, !(mode & IR_OFF));
+        tosa_irda_transceiver_mode(dev, IR_SIRMODE | IR_OFF);
+        gpio_free(TOSA_GPIO_IR_POWERDWN);
+        gpio_free(TOSA_GPIO_IRDA_TX);
 }
 
 static struct pxaficp_platform_data tosa_ficp_platform_data = {
@@ -501,6 +534,7 @@ static void tosa_restart(char mode)
 static void __init tosa_init(void)
 {
         pxa2xx_mfp_config(ARRAY_AND_SIZE(tosa_pin_config));
+        pxa2xx_mfp_config(ARRAY_AND_SIZE(tosa_pin_irda_off));
         gpio_set_wake(MFP_PIN_GPIO1, 1);
         /* We can't pass to gpio-keys since it will drop the Reset altfunc */
 
diff --git a/include/asm-arm/arch-pxa/tosa.h b/include/asm-arm/arch-pxa/tosa.h
index c5b6fde6907c..188226216154 100644
--- a/include/asm-arm/arch-pxa/tosa.h
+++ b/include/asm-arm/arch-pxa/tosa.h
@@ -99,6 +99,7 @@
 #define TOSA_GPIO_TP_INT                (32)    /* Touch Panel pen down interrupt */
 #define TOSA_GPIO_JC_CF_IRQ             (36)    /* CF slot1 Ready */
 #define TOSA_GPIO_BAT_LOCKED            (38)    /* Battery locked */
+#define TOSA_GPIO_IRDA_TX               (47)
 #define TOSA_GPIO_TG_SPI_SCLK           (81)
 #define TOSA_GPIO_TG_SPI_CS             (82)
 #define TOSA_GPIO_TG_SPI_MOSI           (83)