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authorLinus Walleij <linus.walleij@linaro.org>2011-11-24 21:27:15 +0400
committerLinus Walleij <linus.walleij@linaro.org>2012-03-13 01:49:02 +0400
commit394349f7789fdfcdc74b61afcac84046535c40b7 (patch)
tree20dd88e7a1f2dba0a1c227f53960013bf956fa43 /include/linux/pinctrl/pinconf.h
parent70b36378d44d7f5e62458a830b1a9bb1c570f28a (diff)
downloadlinux-394349f7789fdfcdc74b61afcac84046535c40b7.tar.xz
pinctrl: introduce generic pin config
This is a split-off from the earlier patch set which adds generic pin configuration for the pin controllers that want it. Since we may have a system with mixed generic and custom pin controllers, we pass a boolean in the pin controller ops vtable to indicate if it is generic. ChangeLog v1->v5: - Follow parent patch versioning number system. - Document the semantic meaning of return values from pin config get functions, so we can iterate over pins and check their properties from debugfs as part of the generic config code. - Use proper cast functions in the generic debugfs pin config file. - Expand generic config to optionally cover groups too. ChangeLog v5->v6: - Update to match underlying changes. ChangeLog v6->v7: - Drop DRIVE_OFF parameter, use bias high impedance for this - Delete argument for drive modes push-pull, od and os. These are now just state transitions. - Delete slew rate rising/falling due to discussions on on proper semantics - Drop config wakeup, struct irq_chip does this for now, add back if need be. - Set PIN_CONFIG_END to 0x7fff making room for custom config parameters from 0x8000 and up. - Prefix accessor functions with pinconf_
Diffstat (limited to 'include/linux/pinctrl/pinconf.h')
-rw-r--r--include/linux/pinctrl/pinconf.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/pinctrl/pinconf.h b/include/linux/pinctrl/pinconf.h
index f8cf156873d7..ec431f03362d 100644
--- a/include/linux/pinctrl/pinconf.h
+++ b/include/linux/pinctrl/pinconf.h
@@ -20,6 +20,8 @@ struct seq_file;
/**
* struct pinconf_ops - pin config operations, to be implemented by
* pin configuration capable drivers.
+ * @is_generic: for pin controllers that want to use the generic interface,
+ * this flag tells the framework that it's generic.
* @pin_config_get: get the config of a certain pin, if the requested config
* is not available on this controller this should return -ENOTSUPP
* and if it is available but disabled it should return -EINVAL
@@ -33,6 +35,9 @@ struct seq_file;
* per-device info for a certain group in debugfs
*/
struct pinconf_ops {
+#ifdef CONFIG_GENERIC_PINCONF
+ bool is_generic;
+#endif
int (*pin_config_get) (struct pinctrl_dev *pctldev,
unsigned pin,
unsigned long *config);