diff options
| -rw-r--r-- | drivers/pinctrl/core.c | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/drivers/pinctrl/core.c b/drivers/pinctrl/core.c index 552d8c1..e2d4abb 100644 --- a/drivers/pinctrl/core.c +++ b/drivers/pinctrl/core.c @@ -567,14 +567,16 @@ static struct pinctrl *pinctrl_get_locked(struct device *dev, const char *name) } } - /* We should have atleast one map, right */ - if (!num_maps) { - pr_err("could not find any mux maps for device %s, ID %s\n", - devname ? devname : "(anonymous)", - name ? name : "(undefined)"); - kfree(p); - return ERR_PTR(-EINVAL); - } + /* + * This may be perfectly legitimate. An IP block may get re-used + * across SoCs. Not all of those SoCs may need pinmux settings for the + * IP block, e.g. if one SoC dedicates pins to that function but + * another doesn't. The driver won't know this, and will always + * attempt to set up the pinmux. The mapping table defines whether any + * HW programming is actually needed. + */ + if (!num_maps) + dev_info(dev, "zero maps found for mapping %s\n", name); pr_debug("found %u mux maps for device %s, UD %s\n", num_maps, |
