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pinctrl/pinconfig: add debug interface

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This update adds a debugfs interface to modify a pin configuration
for a given state in the pinctrl map. This allows to modify the
configuration for a non-active state, typically sleep state.
This configuration is not applied right away, but only when the state
will be entered.

This solution is mandated for us by HW validation: in order
to test and verify several pin configurations during sleep without
recompiling the software.

Signed-off-by: Laurent Meunier <laurent.meunier@st.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Laurent Meunier
2013-02-06 09:09:44 +01:00
committed by Linus Walleij
parent 007cd69433
commit 6f9e41f4e6
3 changed files with 227 additions and 17 deletions
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18
drivers/pinctrl/core.c
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@@ -32,17 +32,6 @@
#include "pinmux.h"
#include "pinconf.h"
/**
* struct pinctrl_maps - a list item containing part of the mapping table
* @node: mapping table list node
* @maps: array of mapping table entries
* @num_maps: the number of entries in @maps
*/
struct pinctrl_maps {
struct list_head node;
struct pinctrl_map const *maps;
unsigned num_maps;
};
static bool pinctrl_dummy_state;
@@ -56,13 +45,8 @@ LIST_HEAD(pinctrldev_list);
static LIST_HEAD(pinctrl_list);
/* List of pinctrl maps (struct pinctrl_maps) */
static LIST_HEAD(pinctrl_maps);
LIST_HEAD(pinctrl_maps);
#define for_each_maps(_maps_node_, _i_, _map_) \
list_for_each_entry(_maps_node_, &pinctrl_maps, node) \
for (_i_ = 0, _map_ = &_maps_node_->maps[_i_]; \
_i_ < _maps_node_->num_maps; \
_i_++, _map_ = &_maps_node_->maps[_i_])
/**
* pinctrl_provide_dummies() - indicate if pinctrl provides dummy state support