diff options
| author | Kent Gibson <warthog618@gmail.com> | 2022-07-14 10:03:17 +0800 |
|---|---|---|
| committer | Bartosz Golaszewski <brgl@bgdev.pl> | 2022-07-19 10:01:25 +0200 |
| commit | 242202329f0d851f64901111217ca4d52795a4b6 (patch) | |
| tree | 914801ec11e20404feb72baec891573ae88bb560 /drivers/gpio/gpiolib-cdev.c | |
| parent | cfa53463ac62d30e4f30ec6e171b9228689d5a83 (diff) | |
| download | linux-242202329f0d851f64901111217ca4d52795a4b6.tar.bz2 | |
gpiolib: cdev: simplify line event identification
Reorganise line event identification code to reduce code duplication,
and replace if-else initializers with a helper function to improve
readability.
Signed-off-by: Kent Gibson <warthog618@gmail.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/gpio/gpiolib-cdev.c')
| -rw-r--r-- | drivers/gpio/gpiolib-cdev.c | 44 |
1 files changed, 15 insertions, 29 deletions
diff --git a/drivers/gpio/gpiolib-cdev.c b/drivers/gpio/gpiolib-cdev.c index bc7c8822ede0..5765379f4b54 100644 --- a/drivers/gpio/gpiolib-cdev.c +++ b/drivers/gpio/gpiolib-cdev.c @@ -569,6 +569,12 @@ static u64 line_event_timestamp(struct line *line) return ktime_get_ns(); } +static u32 line_event_id(int level) +{ + return level ? GPIO_V2_LINE_EVENT_RISING_EDGE : + GPIO_V2_LINE_EVENT_FALLING_EDGE; +} + static enum hte_return process_hw_ts_thread(void *p) { struct line *line; @@ -590,26 +596,19 @@ static enum hte_return process_hw_ts_thread(void *p) switch (eflags) { case GPIO_V2_LINE_FLAG_EDGE_BOTH: - if (line->raw_level >= 0) { - if (test_bit(FLAG_ACTIVE_LOW, &line->desc->flags)) - level = !line->raw_level; - else - level = line->raw_level; - } else { - level = gpiod_get_value_cansleep(line->desc); - } + level = (line->raw_level >= 0) ? + line->raw_level : + gpiod_get_raw_value_cansleep(line->desc); - if (level) - le.id = GPIO_V2_LINE_EVENT_RISING_EDGE; - else - le.id = GPIO_V2_LINE_EVENT_FALLING_EDGE; + if (test_bit(FLAG_ACTIVE_LOW, &line->desc->flags)) + level = !level; + + le.id = line_event_id(level); break; case GPIO_V2_LINE_FLAG_EDGE_RISING: - /* Emit low-to-high event */ le.id = GPIO_V2_LINE_EVENT_RISING_EDGE; break; case GPIO_V2_LINE_FLAG_EDGE_FALLING: - /* Emit high-to-low event */ le.id = GPIO_V2_LINE_EVENT_FALLING_EDGE; break; default: @@ -684,20 +683,12 @@ static irqreturn_t edge_irq_thread(int irq, void *p) switch (READ_ONCE(line->eflags)) { case GPIO_V2_LINE_FLAG_EDGE_BOTH: - if (gpiod_get_value_cansleep(line->desc)) - /* Emit low-to-high event */ - le.id = GPIO_V2_LINE_EVENT_RISING_EDGE; - else - /* Emit high-to-low event */ - le.id = GPIO_V2_LINE_EVENT_FALLING_EDGE; - + le.id = line_event_id(gpiod_get_value_cansleep(line->desc)); break; case GPIO_V2_LINE_FLAG_EDGE_RISING: - /* Emit low-to-high event */ le.id = GPIO_V2_LINE_EVENT_RISING_EDGE; break; case GPIO_V2_LINE_FLAG_EDGE_FALLING: - /* Emit high-to-low event */ le.id = GPIO_V2_LINE_EVENT_FALLING_EDGE; break; default: @@ -821,12 +812,7 @@ static void debounce_work_func(struct work_struct *work) le.line_seqno : atomic_inc_return(&lr->seqno); } - if (level) - /* Emit low-to-high event */ - le.id = GPIO_V2_LINE_EVENT_RISING_EDGE; - else - /* Emit high-to-low event */ - le.id = GPIO_V2_LINE_EVENT_FALLING_EDGE; + le.id = line_event_id(level); linereq_put_event(lr, &le); } |