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| author | Antoine Ténart <antoine.tenart@free-electrons.com> | 2014-04-10 15:07:50 +0200 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2014-04-22 14:47:02 +0200 |
| commit | e5b3b2d9ed202697a937c282f9c4d93b1e3e0848 (patch) | |
| tree | 787cdc0ff48a468a7a1f466c4bf60019eb99a30e /drivers/pinctrl/core.c | |
| parent | eb171a997de8b746f4d52b23108d64e9f88f0a09 (diff) | |
| download | linux-e5b3b2d9ed202697a937c282f9c4d93b1e3e0848.tar.gz linux-e5b3b2d9ed202697a937c282f9c4d93b1e3e0848.tar.bz2 linux-e5b3b2d9ed202697a937c282f9c4d93b1e3e0848.zip | |
pinctrl: allows not to define the get_group_pins operation
When using a group only pinctrl driver, which does not have any
information on the pins it is useless to define a get_group_pins
always returning an empty list of pins.
When not using get_group_pin[1], a driver must implement it so
pins = NULL and num_pins = 0. This patch makes it the default
behaviour if not defined in the pinctrl driver when used in
pinmux enable and disable funtions and in pinctrl_groups_show.
It also adds a check in pinctrl_get_group_pins and return -EINVAL if
not defined. This function is called in the gpiolib when adding when
pingroup range. It cannot be used if no group is defined, so this seams
reasonable.
[1] get_group_pin(struct pinctrl_dev *pctldev,
unsigned selector,
const unsigned **pins,
unsigned *num_pins);
Signed-off-by: Antoine Ténart <antoine.tenart@free-electrons.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl/core.c')
| -rw-r--r-- | drivers/pinctrl/core.c | 17 |
1 files changed, 10 insertions, 7 deletions
diff --git a/drivers/pinctrl/core.c b/drivers/pinctrl/core.c index c0fe6091566a..e09474ecde23 100644 --- a/drivers/pinctrl/core.c +++ b/drivers/pinctrl/core.c @@ -468,6 +468,9 @@ int pinctrl_get_group_pins(struct pinctrl_dev *pctldev, const char *pin_group, const struct pinctrl_ops *pctlops = pctldev->desc->pctlops; int gs; + if (!pctlops->get_group_pins) + return -EINVAL; + gs = pinctrl_get_group_selector(pctldev, pin_group); if (gs < 0) return gs; @@ -1362,15 +1365,16 @@ static int pinctrl_groups_show(struct seq_file *s, void *what) seq_puts(s, "registered pin groups:\n"); while (selector < ngroups) { - const unsigned *pins; - unsigned num_pins; + const unsigned *pins = NULL; + unsigned num_pins = 0; const char *gname = ops->get_group_name(pctldev, selector); const char *pname; - int ret; + int ret = 0; int i; - ret = ops->get_group_pins(pctldev, selector, - &pins, &num_pins); + if (ops->get_group_pins) + ret = ops->get_group_pins(pctldev, selector, + &pins, &num_pins); if (ret) seq_printf(s, "%s [ERROR GETTING PINS]\n", gname); @@ -1694,8 +1698,7 @@ static int pinctrl_check_ops(struct pinctrl_dev *pctldev) if (!ops || !ops->get_groups_count || - !ops->get_group_name || - !ops->get_group_pins) + !ops->get_group_name) return -EINVAL; if (ops->dt_node_to_map && !ops->dt_free_map) |