diff options
Diffstat (limited to 'drivers/media/video/cx18/cx18-gpio.c')
| -rw-r--r-- | drivers/media/video/cx18/cx18-gpio.c | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/drivers/media/video/cx18/cx18-gpio.c b/drivers/media/video/cx18/cx18-gpio.c index ceb63653c92..b302833f6f9 100644 --- a/drivers/media/video/cx18/cx18-gpio.c +++ b/drivers/media/video/cx18/cx18-gpio.c @@ -53,10 +53,34 @@ static void gpio_write(struct cx18 *cx) write_reg(((dir & 0xffff) << 16) | (val & 0xffff), CX18_REG_GPIO_OUT1); write_reg(dir & 0xffff0000, CX18_REG_GPIO_DIR2); - write_reg((dir & 0xffff0000) | ((val & 0xffff0000) >> 16), + write_reg_sync((dir & 0xffff0000) | ((val & 0xffff0000) >> 16), CX18_REG_GPIO_OUT2); } +void cx18_reset_i2c_slaves_gpio(struct cx18 *cx) +{ + const struct cx18_gpio_i2c_slave_reset *p; + + p = &cx->card->gpio_i2c_slave_reset; + + if ((p->active_lo_mask | p->active_hi_mask) == 0) + return; + + /* Assuming that the masks are a subset of the bits in gpio_dir */ + + /* Assert */ + cx->gpio_val = + (cx->gpio_val | p->active_hi_mask) & ~(p->active_lo_mask); + gpio_write(cx); + schedule_timeout_uninterruptible(msecs_to_jiffies(p->msecs_asserted)); + + /* Deassert */ + cx->gpio_val = + (cx->gpio_val | p->active_lo_mask) & ~(p->active_hi_mask); + gpio_write(cx); + schedule_timeout_uninterruptible(msecs_to_jiffies(p->msecs_recovery)); +} + void cx18_gpio_init(struct cx18 *cx) { cx->gpio_dir = cx->card->gpio_init.direction; |