From dd72f31b4fa87c68e16484a3ed3e4d1843ad7f06 Mon Sep 17 00:00:00 2001 From: Michael Krufky Date: Fri, 28 Nov 2008 01:02:56 -0300 Subject: [PATCH] V4L/DVB (10167): sms1xxx: add support for inverted gpio negative gpio values signify inverted polarity Signed-off-by: Michael Krufky Signed-off-by: Mauro Carvalho Chehab --- drivers/media/dvb/siano/sms-cards.c | 17 +++++++++++++---- 1 file changed, 13 insertions(+), 4 deletions(-) diff --git a/drivers/media/dvb/siano/sms-cards.c b/drivers/media/dvb/siano/sms-cards.c index fd62e0b85621..5a9882ffeb42 100644 --- a/drivers/media/dvb/siano/sms-cards.c +++ b/drivers/media/dvb/siano/sms-cards.c @@ -131,9 +131,10 @@ struct sms_board *sms_get_board(int id) return &sms_boards[id]; } -static int sms_set_gpio(struct smscore_device_t *coredev, u32 pin, int enable) +static int sms_set_gpio(struct smscore_device_t *coredev, int pin, int enable) { - int ret; + int lvl, ret; + u32 gpio; struct smscore_gpio_config gpioconfig = { .direction = SMS_GPIO_DIRECTION_OUTPUT, .pullupdown = SMS_GPIO_PULLUPDOWN_NONE, @@ -145,12 +146,20 @@ static int sms_set_gpio(struct smscore_device_t *coredev, u32 pin, int enable) if (pin == 0) return -EINVAL; - ret = smscore_configure_gpio(coredev, pin, &gpioconfig); + if (pin < 0) { + /* inverted gpio */ + gpio = pin * -1; + lvl = enable ? 0 : 1; + } else { + gpio = pin; + lvl = enable ? 1 : 0; + } + ret = smscore_configure_gpio(coredev, gpio, &gpioconfig); if (ret < 0) return ret; - return smscore_set_gpio(coredev, pin, enable); + return smscore_set_gpio(coredev, gpio, lvl); } int sms_board_setup(struct smscore_device_t *coredev)