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

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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>
This commit is contained in:
Dmitry Baryshkov 2008-06-12 11:42:07 +01:00 committed by Russell King
parent debba222b2
commit b032fccca8
2 changed files with 47 additions and 12 deletions
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58
arch/arm/mach-pxa/tosa.c
View file

@ -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;
tosa_irda_transceiver_mode(dev, IR_SIRMODE | IR_OFF);
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_shutdown(struct device *dev)
{
tosa_irda_transceiver_mode(dev, IR_SIRMODE | IR_OFF);
gpio_free(TOSA_GPIO_IR_POWERDWN);
}
static void tosa_irda_transceiver_mode(struct device *dev, int mode)
{
gpio_set_value(TOSA_GPIO_IR_POWERDWN, !(mode & IR_OFF));
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 */

1
include/asm-arm/arch-pxa/tosa.h
View file

@ -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)