diff options
| author | Chanho Park <chanho61.park@samsung.com> | 2012-01-03 16:47:50 +0900 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2012-01-03 09:10:09 +0100 |
| commit | 706e8520e8450a631ca6f798f8c811faf56f0a59 (patch) | |
| tree | 68b0f77fc1f3b92be3e905e36f14e184403d0b67 /drivers/pinctrl/core.c | |
| parent | e6337c3c96a7ee5cfd5e7afed825f894d4576f58 (diff) | |
| download | lwn-706e8520e8450a631ca6f798f8c811faf56f0a59.tar.gz lwn-706e8520e8450a631ca6f798f8c811faf56f0a59.zip | |
pinctrl: correct a offset while enumerating pins
This patch modifies a offset while enumerating pins to support a
partial pin space. If we use a pin number for enumerating pins,
the pin space always starts with zero base. Indeed, we always check
the pin is in the pin space. An extreme example, there is only two pins.
One is 0. Another is 1000. We always enumerate whole offsets until 1000.
For solving this problem, we use the offset of the pin array instead
of the zero-based pin number.
Signed-off-by: Chanho Park <chanho61.park@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
[Restored sparse pin space comment]
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl/core.c')
| -rw-r--r-- | drivers/pinctrl/core.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/drivers/pinctrl/core.c b/drivers/pinctrl/core.c index 9e32ea311432..79c56d90fcc5 100644 --- a/drivers/pinctrl/core.c +++ b/drivers/pinctrl/core.c @@ -102,12 +102,13 @@ struct pin_desc *pin_desc_get(struct pinctrl_dev *pctldev, unsigned int pin) */ int pin_get_from_name(struct pinctrl_dev *pctldev, const char *name) { - unsigned pin; + unsigned i, pin; - /* The highest pin number need to be included in the loop, thus <= */ - for (pin = 0; pin <= pctldev->desc->maxpin; pin++) { + /* The pin number can be retrived from the pin controller descriptor */ + for (i = 0; i < pctldev->desc->npins; i++) { struct pin_desc *desc; + pin = pctldev->desc->pins[i].number; desc = pin_desc_get(pctldev, pin); /* Pin space may be sparse */ if (desc == NULL) @@ -350,15 +351,16 @@ static int pinctrl_pins_show(struct seq_file *s, void *what) { struct pinctrl_dev *pctldev = s->private; const struct pinctrl_ops *ops = pctldev->desc->pctlops; - unsigned pin; + unsigned i, pin; seq_printf(s, "registered pins: %d\n", pctldev->desc->npins); seq_printf(s, "max pin number: %d\n", pctldev->desc->maxpin); - /* The highest pin number need to be included in the loop, thus <= */ - for (pin = 0; pin <= pctldev->desc->maxpin; pin++) { + /* The pin number can be retrived from the pin controller descriptor */ + for (i = 0; i < pctldev->desc->npins; i++) { struct pin_desc *desc; + pin = pctldev->desc->pins[i].number; desc = pin_desc_get(pctldev, pin); /* Pin space may be sparse */ if (desc == NULL) |