diff options
| author | Michael Krufky <mkrufky@linuxtv.org> | 2008-11-28 01:02:56 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2009-01-02 17:15:11 -0200 |
| commit | dd72f31b4fa87c68e16484a3ed3e4d1843ad7f06 (patch) | |
| tree | b2fd87fc7029e24052a23a2a4f52acbe7d623700 /drivers/media/dvb/siano/sms-cards.c | |
| parent | e4cda3e0728156c6be1d03e72ef20ea811da4ad5 (diff) | |
V4L/DVB (10167): sms1xxx: add support for inverted gpio
negative gpio values signify inverted polarity
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/dvb/siano/sms-cards.c')
| -rw-r--r-- | drivers/media/dvb/siano/sms-cards.c | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/drivers/media/dvb/siano/sms-cards.c b/drivers/media/dvb/siano/sms-cards.c index fd62e0b8562..5a9882ffeb4 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) |