diff options
Diffstat (limited to 'drivers/mfd/ucb1x00-core.c')
| -rw-r--r-- | drivers/mfd/ucb1x00-core.c | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/drivers/mfd/ucb1x00-core.c b/drivers/mfd/ucb1x00-core.c index 162496de1b3..9f8ea52f0ca 100644 --- a/drivers/mfd/ucb1x00-core.c +++ b/drivers/mfd/ucb1x00-core.c @@ -116,14 +116,22 @@ static void ucb1x00_gpio_set(struct gpio_chip *chip, unsigned offset, int value) else ucb->io_out &= ~(1 << offset); + ucb1x00_enable(ucb); ucb1x00_reg_write(ucb, UCB_IO_DATA, ucb->io_out); + ucb1x00_disable(ucb); spin_unlock_irqrestore(&ucb->io_lock, flags); } static int ucb1x00_gpio_get(struct gpio_chip *chip, unsigned offset) { struct ucb1x00 *ucb = container_of(chip, struct ucb1x00, gpio); - return ucb1x00_reg_read(ucb, UCB_IO_DATA) & (1 << offset); + unsigned val; + + ucb1x00_enable(ucb); + val = ucb1x00_reg_read(ucb, UCB_IO_DATA); + ucb1x00_disable(ucb); + + return val & (1 << offset); } static int ucb1x00_gpio_direction_input(struct gpio_chip *chip, unsigned offset) @@ -133,7 +141,9 @@ static int ucb1x00_gpio_direction_input(struct gpio_chip *chip, unsigned offset) spin_lock_irqsave(&ucb->io_lock, flags); ucb->io_dir &= ~(1 << offset); + ucb1x00_enable(ucb); ucb1x00_reg_write(ucb, UCB_IO_DIR, ucb->io_dir); + ucb1x00_disable(ucb); spin_unlock_irqrestore(&ucb->io_lock, flags); return 0; @@ -153,6 +163,7 @@ static int ucb1x00_gpio_direction_output(struct gpio_chip *chip, unsigned offset else ucb->io_out &= ~mask; + ucb1x00_enable(ucb); if (old != ucb->io_out) ucb1x00_reg_write(ucb, UCB_IO_DATA, ucb->io_out); @@ -160,6 +171,7 @@ static int ucb1x00_gpio_direction_output(struct gpio_chip *chip, unsigned offset ucb->io_dir |= mask; ucb1x00_reg_write(ucb, UCB_IO_DIR, ucb->io_dir); } + ucb1x00_disable(ucb); spin_unlock_irqrestore(&ucb->io_lock, flags); return 0; @@ -703,8 +715,10 @@ static int ucb1x00_resume(struct mcp *mcp) struct ucb1x00 *ucb = mcp_get_drvdata(mcp); struct ucb1x00_dev *dev; + ucb1x00_enable(ucb); ucb1x00_reg_write(ucb, UCB_IO_DATA, ucb->io_out); ucb1x00_reg_write(ucb, UCB_IO_DIR, ucb->io_dir); + ucb1x00_disable(ucb); mutex_lock(&ucb1x00_mutex); list_for_each_entry(dev, &ucb->devs, dev_node) { if (dev->drv->resume) |