diff options
| author | Kent Gibson <warthog618@gmail.com> | 2020-07-08 07:15:47 +0300 |
|---|---|---|
| committer | Bartosz Golaszewski <bgolaszewski@baylibre.com> | 2020-07-12 11:22:00 +0300 |
| commit | c274b58a4b8a3bfbf0bb0b5f5332e3e049d75b65 (patch) | |
| tree | 8b6cd41e88f3f4cbb2bb43dc0dedc794f398ebc9 /drivers/gpio/gpiolib-cdev.c | |
| parent | a18512e3f110637d5a4426c7d1d8761566a7e15e (diff) | |
| download | linux-c274b58a4b8a3bfbf0bb0b5f5332e3e049d75b65.tar.xz | |
gpiolib: cdev: refactor gpiohandle_flags_to_desc_flags
Refactor the mapping from handle flags to desc flags into a helper
function.
The assign_bit is overkill where it is replacing the set_bit cases, as is
rechecking bits known to be clear in some circumstances, but the DRY
simplification more than makes up for any performance degradation,
especially as this is not a hot path.
Signed-off-by: Kent Gibson <warthog618@gmail.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Diffstat (limited to 'drivers/gpio/gpiolib-cdev.c')
| -rw-r--r-- | drivers/gpio/gpiolib-cdev.c | 60 |
1 files changed, 19 insertions, 41 deletions
diff --git a/drivers/gpio/gpiolib-cdev.c b/drivers/gpio/gpiolib-cdev.c index 889ed2dc9e58..e64613b8d0ba 100644 --- a/drivers/gpio/gpiolib-cdev.c +++ b/drivers/gpio/gpiolib-cdev.c @@ -106,6 +106,22 @@ static int linehandle_validate_flags(u32 flags) return 0; } +static void linehandle_flags_to_desc_flags(u32 lflags, unsigned long *flagsp) +{ + assign_bit(FLAG_ACTIVE_LOW, flagsp, + lflags & GPIOHANDLE_REQUEST_ACTIVE_LOW); + assign_bit(FLAG_OPEN_DRAIN, flagsp, + lflags & GPIOHANDLE_REQUEST_OPEN_DRAIN); + assign_bit(FLAG_OPEN_SOURCE, flagsp, + lflags & GPIOHANDLE_REQUEST_OPEN_SOURCE); + assign_bit(FLAG_PULL_UP, flagsp, + lflags & GPIOHANDLE_REQUEST_BIAS_PULL_UP); + assign_bit(FLAG_PULL_DOWN, flagsp, + lflags & GPIOHANDLE_REQUEST_BIAS_PULL_DOWN); + assign_bit(FLAG_BIAS_DISABLE, flagsp, + lflags & GPIOHANDLE_REQUEST_BIAS_DISABLE); +} + static long linehandle_set_config(struct linehandle_state *lh, void __user *ip) { @@ -113,7 +129,6 @@ static long linehandle_set_config(struct linehandle_state *lh, struct gpio_desc *desc; int i, ret; u32 lflags; - unsigned long *flagsp; if (copy_from_user(&gcnf, ip, sizeof(gcnf))) return -EFAULT; @@ -125,25 +140,7 @@ static long linehandle_set_config(struct linehandle_state *lh, for (i = 0; i < lh->numdescs; i++) { desc = lh->descs[i]; - flagsp = &desc->flags; - - assign_bit(FLAG_ACTIVE_LOW, flagsp, - lflags & GPIOHANDLE_REQUEST_ACTIVE_LOW); - - assign_bit(FLAG_OPEN_DRAIN, flagsp, - lflags & GPIOHANDLE_REQUEST_OPEN_DRAIN); - - assign_bit(FLAG_OPEN_SOURCE, flagsp, - lflags & GPIOHANDLE_REQUEST_OPEN_SOURCE); - - assign_bit(FLAG_PULL_UP, flagsp, - lflags & GPIOHANDLE_REQUEST_BIAS_PULL_UP); - - assign_bit(FLAG_PULL_DOWN, flagsp, - lflags & GPIOHANDLE_REQUEST_BIAS_PULL_DOWN); - - assign_bit(FLAG_BIAS_DISABLE, flagsp, - lflags & GPIOHANDLE_REQUEST_BIAS_DISABLE); + linehandle_flags_to_desc_flags(gcnf.flags, &desc->flags); /* * Lines have to be requested explicitly for input @@ -306,19 +303,7 @@ static int linehandle_create(struct gpio_device *gdev, void __user *ip) goto out_free_descs; lh->descs[i] = desc; count = i + 1; - - if (lflags & GPIOHANDLE_REQUEST_ACTIVE_LOW) - set_bit(FLAG_ACTIVE_LOW, &desc->flags); - if (lflags & GPIOHANDLE_REQUEST_OPEN_DRAIN) - set_bit(FLAG_OPEN_DRAIN, &desc->flags); - if (lflags & GPIOHANDLE_REQUEST_OPEN_SOURCE) - set_bit(FLAG_OPEN_SOURCE, &desc->flags); - if (lflags & GPIOHANDLE_REQUEST_BIAS_DISABLE) - set_bit(FLAG_BIAS_DISABLE, &desc->flags); - if (lflags & GPIOHANDLE_REQUEST_BIAS_PULL_DOWN) - set_bit(FLAG_PULL_DOWN, &desc->flags); - if (lflags & GPIOHANDLE_REQUEST_BIAS_PULL_UP) - set_bit(FLAG_PULL_UP, &desc->flags); + linehandle_flags_to_desc_flags(handlereq.flags, &desc->flags); ret = gpiod_set_transitory(desc, false); if (ret < 0) @@ -685,14 +670,7 @@ static int lineevent_create(struct gpio_device *gdev, void __user *ip) le->desc = desc; le->eflags = eflags; - if (lflags & GPIOHANDLE_REQUEST_ACTIVE_LOW) - set_bit(FLAG_ACTIVE_LOW, &desc->flags); - if (lflags & GPIOHANDLE_REQUEST_BIAS_DISABLE) - set_bit(FLAG_BIAS_DISABLE, &desc->flags); - if (lflags & GPIOHANDLE_REQUEST_BIAS_PULL_DOWN) - set_bit(FLAG_PULL_DOWN, &desc->flags); - if (lflags & GPIOHANDLE_REQUEST_BIAS_PULL_UP) - set_bit(FLAG_PULL_UP, &desc->flags); + linehandle_flags_to_desc_flags(lflags, &desc->flags); ret = gpiod_direction_input(desc); if (ret) |