From b032fccca80cbbedaa80e5a72a202a43f08aa97e Mon Sep 17 00:00:00 2001
From: Dmitry Baryshkov <dbaryshkov@gmail.com>
Date: Thu, 12 Jun 2008 11:42:07 +0100
Subject: [PATCH] [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>
---
arch/arm/mach-pxa/tosa.c | 58 ++++++++++++++++++++++++++-------
include/asm-arm/arch-pxa/tosa.h | 1 +
2 files changed, 47 insertions(+), 12 deletions(-)
diff --git a/arch/arm/mach-pxa/tosa.c b/arch/arm/mach-pxa/tosa.c
index 9892464d7abc0..7a89f764acf31 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 c5b6fde6907c4..1882262161542 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)
--
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