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pinctrl: refactor struct pinctrl handling in core.c vs pinmux.c

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This change separates two aspects of struct pinctrl:

a) The data representation of the parsed mapping table, into:

   1) The top-level struct pinctrl object, a single entity returned
      by pinctrl_get().

   2) The parsed version of each mapping table entry, struct
      pinctrl_setting, of which there is one per mapping table entry.

b) The code that handles this; the code for (1) above is in core.c, and
   the code to parse/execute each entry in (2) above is in pinmux.c, while
   the iteration over multiple settings is lifted to core.c.

This will allow the following future changes:

1) pinctrl_get() API rework, so that struct pinctrl represents all states
   for the device, and the device can select between them without calling
   put()/get() again.

2) To support that, a struct pinctrl_state object will be inserted into
   the data model between the struct pinctrl and struct pinctrl_setting.

3) The mapping table will be extended to allow specification of pin config
   settings too. To support this, struct pinctrl_setting will be enhanced
   to store either mux settings or config settings, and functions will be
   added to pinconf.c to parse/execute pin configuration settings.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Dong Aisheng <dong.aisheng@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Stephen Warren 2012-03-02 13:05:45 -07:00 committed by Linus Walleij
parent 57b676f9c1
commit 7ecdb16fe6
4 changed files with 202 additions and 381 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

115
drivers/pinctrl/core.c
View File

@ -460,14 +460,15 @@ EXPORT_SYMBOL_GPL(pinctrl_gpio_direction_output);
static struct pinctrl *pinctrl_get_locked(struct device *dev, const char *name) static struct pinctrl *pinctrl_get_locked(struct device *dev, const char *name)
{ {
struct pinctrl_dev *pctldev = NULL; struct pinctrl_dev *pctldev;
const char *devname; const char *devname;
struct pinctrl *p; struct pinctrl *p;
unsigned num_maps = 0; unsigned num_maps = 0;
int ret = -ENODEV; int ret;
struct pinctrl_maps *maps_node; struct pinctrl_maps *maps_node;
int i; int i;
struct pinctrl_map const *map; struct pinctrl_map const *map;
struct pinctrl_setting *setting;
/* We must have both a dev and state name */ /* We must have both a dev and state name */
if (WARN_ON(!dev || !name)) if (WARN_ON(!dev || !name))
@ -487,26 +488,12 @@ static struct pinctrl *pinctrl_get_locked(struct device *dev, const char *name)
dev_err(dev, "failed to alloc struct pinctrl\n"); dev_err(dev, "failed to alloc struct pinctrl\n");
return ERR_PTR(-ENOMEM); return ERR_PTR(-ENOMEM);
} }
pinmux_init_pinctrl_handle(p); p->dev = dev;
p->state = name;
INIT_LIST_HEAD(&p->settings);
/* Iterate over the pin control maps to locate the right ones */ /* Iterate over the pin control maps to locate the right ones */
for_each_maps(maps_node, i, map) { for_each_maps(maps_node, i, map) {
/*
* First, try to find the pctldev given in the map
*/
pctldev = get_pinctrl_dev_from_devname(map->ctrl_dev_name);
if (!pctldev) {
dev_err(dev, "unknown pinctrl device %s in map entry",
map->ctrl_dev_name);
pinmux_put(p);
kfree(p);
/* Eventually, this should trigger deferred probe */
return ERR_PTR(-ENODEV);
}
dev_dbg(dev, "in map, found pctldev %s to handle function %s",
dev_name(pctldev->dev), map->function);
/* Map must be for this device */ /* Map must be for this device */
if (strcmp(map->dev_name, devname)) if (strcmp(map->dev_name, devname))
continue; continue;
@ -515,11 +502,36 @@ static struct pinctrl *pinctrl_get_locked(struct device *dev, const char *name)
if (strcmp(map->name, name)) if (strcmp(map->name, name))
continue; continue;
ret = pinmux_apply_muxmap(pctldev, p, dev, devname, map); /*
if (ret) { * Try to find the pctldev given in the map
kfree(p); */
return ERR_PTR(ret); pctldev = get_pinctrl_dev_from_devname(map->ctrl_dev_name);
if (!pctldev) {
dev_err(dev, "unknown pinctrl device %s in map entry",
map->ctrl_dev_name);
/* Eventually, this should trigger deferred probe */
ret = -ENODEV;
goto error;
} }
dev_dbg(dev, "in map, found pctldev %s to handle function %s",
dev_name(pctldev->dev), map->function);
setting = kzalloc(sizeof(*setting), GFP_KERNEL);
if (setting == NULL) {
dev_err(dev,
"failed to alloc struct pinctrl_setting\n");
ret = -ENOMEM;
goto error;
}
setting->pctldev = pctldev;
ret = pinmux_map_to_setting(map, setting);
if (ret < 0)
goto error;
list_add_tail(&setting->node, &p->settings);
num_maps++; num_maps++;
} }
@ -541,6 +553,14 @@ static struct pinctrl *pinctrl_get_locked(struct device *dev, const char *name)
list_add_tail(&p->node, &pinctrl_list); list_add_tail(&p->node, &pinctrl_list);
return p; return p;
error:
list_for_each_entry(setting, &p->settings, node)
pinmux_free_setting(setting);
kfree(p);
return ERR_PTR(ret);
} }
/** /**
@ -564,13 +584,18 @@ EXPORT_SYMBOL_GPL(pinctrl_get);
static void pinctrl_put_locked(struct pinctrl *p) static void pinctrl_put_locked(struct pinctrl *p)
{ {
struct pinctrl_setting *setting, *n;
if (p == NULL) if (p == NULL)
return; return;
if (p->usecount) if (p->usecount)
pr_warn("releasing pin control handle with active users!\n"); pr_warn("releasing pin control handle with active users!\n");
/* Free the groups and all acquired pins */ list_for_each_entry_safe(setting, n, &p->settings, node) {
pinmux_put(p); pinmux_free_setting(setting);
list_del(&setting->node);
kfree(setting);
}
/* Remove from list */ /* Remove from list */
list_del(&p->node); list_del(&p->node);
@ -592,18 +617,24 @@ EXPORT_SYMBOL_GPL(pinctrl_put);
static int pinctrl_enable_locked(struct pinctrl *p) static int pinctrl_enable_locked(struct pinctrl *p)
{ {
int ret = 0; struct pinctrl_setting *setting;
int ret;
if (p == NULL) if (p == NULL)
return -EINVAL; return -EINVAL;
if (p->usecount++ == 0) { if (p->usecount++ == 0) {
ret = pinmux_enable(p); list_for_each_entry(setting, &p->settings, node) {
if (ret) ret = pinmux_enable_setting(setting);
p->usecount--; if (ret < 0) {
/* FIXME: Difficult to return to prev state */
p->usecount--;
return ret;
}
}
} }
return ret; return 0;
} }
/** /**
@ -622,11 +653,14 @@ EXPORT_SYMBOL_GPL(pinctrl_enable);
static void pinctrl_disable_locked(struct pinctrl *p) static void pinctrl_disable_locked(struct pinctrl *p)
{ {
struct pinctrl_setting *setting;
if (p == NULL) if (p == NULL)
return; return;
if (--p->usecount == 0) { if (--p->usecount == 0) {
pinmux_disable(p); list_for_each_entry(setting, &p->settings, node)
pinmux_disable_setting(setting);
} }
} }
@ -857,27 +891,20 @@ static int pinctrl_maps_show(struct seq_file *s, void *what)
static int pinctrl_show(struct seq_file *s, void *what) static int pinctrl_show(struct seq_file *s, void *what)
{ {
struct pinctrl *p; struct pinctrl *p;
struct pinctrl_setting *setting;
seq_puts(s, "Requested pin control handlers their pinmux maps:\n"); seq_puts(s, "Requested pin control handlers their pinmux maps:\n");
mutex_lock(&pinctrl_mutex); mutex_lock(&pinctrl_mutex);
list_for_each_entry(p, &pinctrl_list, node) { list_for_each_entry(p, &pinctrl_list, node) {
struct pinctrl_dev *pctldev = p->pctldev; seq_printf(s, "device: %s state: %s users: %u\n",
dev_name(p->dev), p->state, p->usecount);
if (!pctldev) { list_for_each_entry(setting, &p->settings, node) {
seq_puts(s, "NO PIN CONTROLLER DEVICE\n"); seq_printf(s, " ");
continue; pinmux_dbg_show(s, setting);
} }
seq_printf(s, "device: %s",
pinctrl_dev_get_name(p->pctldev));
pinmux_dbg_show(s, p);
seq_printf(s, " users: %u map-> %s\n",
p->usecount,
p->dev ? dev_name(p->dev) : "(system)");
} }
mutex_unlock(&pinctrl_mutex); mutex_unlock(&pinctrl_mutex);

25
drivers/pinctrl/core.h
View File

@ -49,22 +49,31 @@ struct pinctrl_dev {
* struct pinctrl - per-device pin control state holder * struct pinctrl - per-device pin control state holder
* @node: global list node * @node: global list node
* @dev: the device using this pin control handle * @dev: the device using this pin control handle
* @state: the state name passed to pinctrl_get()
* @usecount: the number of active users of this pin controller setting, used * @usecount: the number of active users of this pin controller setting, used
* to keep track of nested use cases * to keep track of nested use cases
* @pctldev: pin control device handling this pin control handle * @settings: a list of settings for this device/state
* @groups: the group selectors for the pinmux device and
* selector combination handling this pinmux, this is a list that
* will be traversed on all pinmux operations such as
* get/put/enable/disable
*/ */
struct pinctrl { struct pinctrl {
struct list_head node; struct list_head node;
struct device *dev; struct device *dev;
const char *state;
unsigned usecount; unsigned usecount;
struct list_head settings;
};
/**
* struct pinctrl_setting - an individual mux setting
* @node: list node for struct pinctrl's @settings field
* @pctldev: pin control device handling to be programmed
* @group_selector: the group selector to program
* @func_selector: the function selector to program
*/
struct pinctrl_setting {
struct list_head node;
struct pinctrl_dev *pctldev; struct pinctrl_dev *pctldev;
#ifdef CONFIG_PINMUX unsigned group_selector;
struct list_head groups; unsigned func_selector;
#endif
}; };
/** /**

402
drivers/pinctrl/pinmux.c
View File

@ -7,6 +7,8 @@
* *
* Author: Linus Walleij <linus.walleij@linaro.org> * Author: Linus Walleij <linus.walleij@linaro.org>
* *
* Copyright (C) 2012 NVIDIA CORPORATION. All rights reserved.
*
* License terms: GNU General Public License (GPL) version 2 * License terms: GNU General Public License (GPL) version 2
*/ */
#define pr_fmt(fmt) "pinmux core: " fmt #define pr_fmt(fmt) "pinmux core: " fmt
@ -28,19 +30,6 @@
#include "core.h" #include "core.h"
#include "pinmux.h" #include "pinmux.h"
/**
* struct pinmux_group - group list item for pinmux groups
* @node: pinmux group list node
* @func_selector: the function selector for the pinmux device handling
* this pinmux
* @group_selector: the group selector for this group
*/
struct pinmux_group {
struct list_head node;
unsigned func_selector;
unsigned group_selector;
};
int pinmux_check_ops(struct pinctrl_dev *pctldev) int pinmux_check_ops(struct pinctrl_dev *pctldev)
{ {
const struct pinmux_ops *ops = pctldev->desc->pmxops; const struct pinmux_ops *ops = pctldev->desc->pmxops;
@ -244,164 +233,8 @@ int pinmux_gpio_direction(struct pinctrl_dev *pctldev,
return ret; return ret;
} }
/** static int pinmux_func_name_to_selector(struct pinctrl_dev *pctldev,
* acquire_pins() - acquire all the pins for a certain function on a pinmux const char *function)
* @pctldev: the device to take the pins on
* @owner: a representation of the owner of this pin; typically the device
* name that controls its mux function
* @group_selector: the group selector containing the pins to acquire
*/
static int acquire_pins(struct pinctrl_dev *pctldev,
const char *owner,
unsigned group_selector)
{
const struct pinctrl_ops *pctlops = pctldev->desc->pctlops;
const unsigned *pins;
unsigned num_pins;
int ret;
int i;
ret = pctlops->get_group_pins(pctldev, group_selector,
&pins, &num_pins);
if (ret)
return ret;
dev_dbg(pctldev->dev, "requesting the %u pins from group %u\n",
num_pins, group_selector);
/* Try to allocate all pins in this group, one by one */
for (i = 0; i < num_pins; i++) {
ret = pin_request(pctldev, pins[i], owner, NULL);
if (ret) {
dev_err(pctldev->dev,
"could not get request pin %d on device %s - conflicting mux mappings?\n",
pins[i],
pinctrl_dev_get_name(pctldev));
/* On error release all taken pins */
i--; /* this pin just failed */
for (; i >= 0; i--)
pin_free(pctldev, pins[i], NULL);
return -ENODEV;
}
}
return 0;
}
/**
* release_pins() - release pins taken by earlier acquirement
* @pctldev: the device to free the pins on
* @group_selector: the group selector containing the pins to free
*/
static void release_pins(struct pinctrl_dev *pctldev,
unsigned group_selector)
{
const struct pinctrl_ops *pctlops = pctldev->desc->pctlops;
const unsigned *pins;
unsigned num_pins;
int ret;
int i;
ret = pctlops->get_group_pins(pctldev, group_selector,
&pins, &num_pins);
if (ret) {
dev_err(pctldev->dev, "could not get pins to release for group selector %d\n",
group_selector);
return;
}
for (i = 0; i < num_pins; i++)
pin_free(pctldev, pins[i], NULL);
}
/**
* pinmux_check_pin_group() - check function and pin group combo
* @pctldev: device to check the pin group vs function for
* @func_selector: the function selector to check the pin group for, we have
* already looked this up in the calling function
* @pin_group: the pin group to match to the function
*
* This function will check that the pinmux driver can supply the
* selected pin group for a certain function, returns the group selector if
* the group and function selector will work fine together, else returns
* negative
*/
static int pinmux_check_pin_group(struct pinctrl_dev *pctldev,
unsigned func_selector,
const char *pin_group)
{
const struct pinmux_ops *pmxops = pctldev->desc->pmxops;
const struct pinctrl_ops *pctlops = pctldev->desc->pctlops;
int ret;
/*
* If the driver does not support different pin groups for the
* functions, we only support group 0, and assume this exists.
*/
if (!pctlops || !pctlops->list_groups)
return 0;
/*
* Passing NULL (no specific group) will select the first and
* hopefully only group of pins available for this function.
*/
if (!pin_group) {
char const * const *groups;
unsigned num_groups;
ret = pmxops->get_function_groups(pctldev, func_selector,
&groups, &num_groups);
if (ret)
return ret;
if (num_groups < 1)
return -EINVAL;
ret = pinctrl_get_group_selector(pctldev, groups[0]);
if (ret < 0) {
dev_err(pctldev->dev,
"function %s wants group %s but the pin controller does not seem to have that group\n",
pmxops->get_function_name(pctldev, func_selector),
groups[0]);
return ret;
}
if (num_groups > 1)
dev_dbg(pctldev->dev,
"function %s support more than one group, default-selecting first group %s (%d)\n",
pmxops->get_function_name(pctldev, func_selector),
groups[0],
ret);
return ret;
}
dev_dbg(pctldev->dev,
"check if we have pin group %s on controller %s\n",
pin_group, pinctrl_dev_get_name(pctldev));
ret = pinctrl_get_group_selector(pctldev, pin_group);
if (ret < 0) {
dev_dbg(pctldev->dev,
"%s does not support pin group %s with function %s\n",
pinctrl_dev_get_name(pctldev),
pin_group,
pmxops->get_function_name(pctldev, func_selector));
}
return ret;
}
/**
* pinmux_search_function() - check pin control driver for a certain function
* @pctldev: device to check for function and position
* @map: function map containing the function and position to look for
* @func_selector: returns the applicable function selector if found
* @group_selector: returns the applicable group selector if found
*
* This will search the pinmux driver for an applicable
* function with a specific pin group, returns 0 if these can be mapped
* negative otherwise
*/
static int pinmux_search_function(struct pinctrl_dev *pctldev,
struct pinctrl_map const *map,
unsigned *func_selector,
unsigned *group_selector)
{ {
const struct pinmux_ops *ops = pctldev->desc->pmxops; const struct pinmux_ops *ops = pctldev->desc->pmxops;
unsigned selector = 0; unsigned selector = 0;
@ -410,155 +243,128 @@ static int pinmux_search_function(struct pinctrl_dev *pctldev,
while (ops->list_functions(pctldev, selector) >= 0) { while (ops->list_functions(pctldev, selector) >= 0) {
const char *fname = ops->get_function_name(pctldev, const char *fname = ops->get_function_name(pctldev,
selector); selector);
int ret;
if (!strcmp(map->function, fname)) { if (!strcmp(function, fname))
/* Found the function, check pin group */ return selector;
ret = pinmux_check_pin_group(pctldev, selector,
map->group);
if (ret < 0)
return ret;
/* This function and group selector can be used */
*func_selector = selector;
*group_selector = ret;
return 0;
}
selector++; selector++;
} }
pr_err("%s does not support function %s\n", pr_err("%s does not support function %s\n",
pinctrl_dev_get_name(pctldev), map->function); pinctrl_dev_get_name(pctldev), function);
return -EINVAL; return -EINVAL;
} }
/** int pinmux_map_to_setting(struct pinctrl_map const *map,
* pinmux_enable_muxmap() - enable a map entry for a certain pinmux struct pinctrl_setting *setting)
*/
static int pinmux_enable_muxmap(struct pinctrl_dev *pctldev,
struct pinctrl *p,
struct device *dev,
const char *devname,
struct pinctrl_map const *map)
{ {
unsigned func_selector; struct pinctrl_dev *pctldev = setting->pctldev;
unsigned group_selector; const struct pinmux_ops *pmxops = pctldev->desc->pmxops;
struct pinmux_group *grp; const struct pinctrl_ops *pctlops = pctldev->desc->pctlops;
char const * const *groups;
unsigned num_groups;
int ret; int ret;
const char *group;
int i;
const unsigned *pins;
unsigned num_pins;
/* setting->func_selector =
* Note that we're not locking the pinmux mutex here, because pinmux_func_name_to_selector(pctldev, map->function);
* this is only called at pinmux initialization time when it if (setting->func_selector < 0)
* has not been added to any list and thus is not reachable return setting->func_selector;
* by anyone else.
*/
if (p->pctldev && p->pctldev != pctldev) { ret = pmxops->get_function_groups(pctldev, setting->func_selector,
dev_err(pctldev->dev, &groups, &num_groups);
"different pin control devices given for device %s, function %s\n",
devname, map->function);
return -EINVAL;
}
p->dev = dev;
p->pctldev = pctldev;
/* Now go into the driver and try to match a function and group */
ret = pinmux_search_function(pctldev, map, &func_selector,
&group_selector);
if (ret < 0) if (ret < 0)
return ret; return ret;
if (!num_groups)
return -EINVAL;
/* Now add this group selector, we may have many of them */ if (map->group) {
grp = kmalloc(sizeof(*grp), GFP_KERNEL); bool found = false;
if (!grp) group = map->group;
return -ENOMEM; for (i = 0; i < num_groups; i++) {
grp->func_selector = func_selector; if (!strcmp(group, groups[i])) {
grp->group_selector = group_selector; found = true;
ret = acquire_pins(pctldev, devname, group_selector); break;
}
}
if (!found)
return -EINVAL;
} else {
group = groups[0];
}
setting->group_selector =
pinctrl_get_group_selector(pctldev, group);
if (setting->group_selector < 0)
return setting->group_selector;
ret = pctlops->get_group_pins(pctldev, setting->group_selector,
&pins, &num_pins);
if (ret) { if (ret) {
kfree(grp); dev_err(pctldev->dev,
return ret; "could not get pins for device %s group selector %d\n",
pinctrl_dev_get_name(pctldev), setting->group_selector);
return -ENODEV;
}
/* Try to allocate all pins in this group, one by one */
for (i = 0; i < num_pins; i++) {
ret = pin_request(pctldev, pins[i], map->dev_name, NULL);
if (ret) {
dev_err(pctldev->dev,
"could not get request pin %d on device %s\n",
pins[i], pinctrl_dev_get_name(pctldev));
/* On error release all taken pins */
i--; /* this pin just failed */
for (; i >= 0; i--)
pin_free(pctldev, pins[i], NULL);
return -ENODEV;
}
} }
list_add_tail(&grp->node, &p->groups);
return 0; return 0;
} }
/** void pinmux_free_setting(struct pinctrl_setting const *setting)
* pinmux_apply_muxmap() - apply a certain mux mapping entry
*/
int pinmux_apply_muxmap(struct pinctrl_dev *pctldev,
struct pinctrl *p,
struct device *dev,
const char *devname,
struct pinctrl_map const *map)
{ {
struct pinctrl_dev *pctldev = setting->pctldev;
const struct pinctrl_ops *pctlops = pctldev->desc->pctlops;
const unsigned *pins;
unsigned num_pins;
int ret; int ret;
int i;
ret = pinmux_enable_muxmap(pctldev, p, dev, ret = pctlops->get_group_pins(pctldev, setting->group_selector,
devname, map); &pins, &num_pins);
if (ret) { if (ret) {
pinmux_put(p); dev_err(pctldev->dev,
return ret; "could not get pins for device %s group selector %d\n",
pinctrl_dev_get_name(pctldev), setting->group_selector);
return;
} }
return 0; for (i = 0; i < num_pins; i++)
pin_free(pctldev, pins[i], NULL);
} }
/** int pinmux_enable_setting(struct pinctrl_setting const *setting)
* pinmux_put() - free up the pinmux portions of a pin controller handle
*/
void pinmux_put(struct pinctrl *p)
{ {
struct list_head *node, *tmp; struct pinctrl_dev *pctldev = setting->pctldev;
list_for_each_safe(node, tmp, &p->groups) {
struct pinmux_group *grp =
list_entry(node, struct pinmux_group, node);
/* Release all pins taken by this group */
release_pins(p->pctldev, grp->group_selector);
list_del(node);
kfree(grp);
}
}
/**
* pinmux_enable() - enable the pinmux portion of a pin control handle
*/
int pinmux_enable(struct pinctrl *p)
{
struct pinctrl_dev *pctldev = p->pctldev;
const struct pinmux_ops *ops = pctldev->desc->pmxops; const struct pinmux_ops *ops = pctldev->desc->pmxops;
struct pinmux_group *grp;
int ret;
list_for_each_entry(grp, &p->groups, node) { return ops->enable(pctldev, setting->func_selector,
ret = ops->enable(pctldev, grp->func_selector, setting->group_selector);
grp->group_selector);
if (ret)
/*
* TODO: call disable() on all groups we called
* enable() on to this point?
*/
return ret;
}
return 0;
} }
/** void pinmux_disable_setting(struct pinctrl_setting const *setting)
* pinmux_disable() - disable the pinmux portions of a pin control handle
*/
void pinmux_disable(struct pinctrl *p)
{ {
struct pinctrl_dev *pctldev = p->pctldev; struct pinctrl_dev *pctldev = setting->pctldev;
const struct pinmux_ops *ops = pctldev->desc->pmxops; const struct pinmux_ops *ops = pctldev->desc->pmxops;
struct pinmux_group *grp;
list_for_each_entry(grp, &p->groups, node) { ops->disable(pctldev, setting->func_selector, setting->group_selector);
ops->disable(pctldev, grp->func_selector,
grp->group_selector);
}
} }
#ifdef CONFIG_DEBUG_FS #ifdef CONFIG_DEBUG_FS
@ -635,30 +441,18 @@ static int pinmux_pins_show(struct seq_file *s, void *what)
return 0; return 0;
} }
void pinmux_dbg_show(struct seq_file *s, struct pinctrl *p) void pinmux_dbg_show(struct seq_file *s, struct pinctrl_setting const *setting)
{ {
struct pinctrl_dev *pctldev = p->pctldev; struct pinctrl_dev *pctldev = setting->pctldev;
const struct pinmux_ops *pmxops; const struct pinmux_ops *pmxops = pctldev->desc->pmxops;
const struct pinctrl_ops *pctlops; const struct pinctrl_ops *pctlops = pctldev->desc->pctlops;
struct pinmux_group *grp;
const char *sep = "";
pmxops = pctldev->desc->pmxops; seq_printf(s, "controller: %s group: %s (%u) function: %s (%u)\n",
pctlops = pctldev->desc->pctlops; pinctrl_dev_get_name(pctldev),
pctlops->get_group_name(pctldev, setting->group_selector),
seq_printf(s, " groups: ["); setting->group_selector,
list_for_each_entry(grp, &p->groups, node) { pmxops->get_function_name(pctldev, setting->func_selector),
seq_printf(s, "%s%s (%u)=%s (%u)", setting->func_selector);
sep,
pctlops->get_group_name(pctldev,
grp->group_selector),
grp->group_selector,
pmxops->get_function_name(pctldev,
grp->func_selector),
grp->func_selector);
sep = ", ";
}
seq_printf(s, " ]");
} }
static int pinmux_functions_open(struct inode *inode, struct file *file) static int pinmux_functions_open(struct inode *inode, struct file *file)

41
drivers/pinctrl/pinmux.h
View File

@ -13,6 +13,7 @@
#ifdef CONFIG_PINMUX #ifdef CONFIG_PINMUX
int pinmux_check_ops(struct pinctrl_dev *pctldev); int pinmux_check_ops(struct pinctrl_dev *pctldev);
int pinmux_request_gpio(struct pinctrl_dev *pctldev, int pinmux_request_gpio(struct pinctrl_dev *pctldev,
struct pinctrl_gpio_range *range, struct pinctrl_gpio_range *range,
unsigned pin, unsigned gpio); unsigned pin, unsigned gpio);
@ -21,21 +22,16 @@ void pinmux_free_gpio(struct pinctrl_dev *pctldev, unsigned pin,
int pinmux_gpio_direction(struct pinctrl_dev *pctldev, int pinmux_gpio_direction(struct pinctrl_dev *pctldev,
struct pinctrl_gpio_range *range, struct pinctrl_gpio_range *range,
unsigned pin, bool input); unsigned pin, bool input);
static inline void pinmux_init_pinctrl_handle(struct pinctrl *p)
{ int pinmux_map_to_setting(struct pinctrl_map const *map,
INIT_LIST_HEAD(&p->groups); struct pinctrl_setting *setting);
} void pinmux_free_setting(struct pinctrl_setting const *setting);
int pinmux_apply_muxmap(struct pinctrl_dev *pctldev, int pinmux_enable_setting(struct pinctrl_setting const *setting);
struct pinctrl *p, void pinmux_disable_setting(struct pinctrl_setting const *setting);
struct device *dev,
const char *devname, void pinmux_dbg_show(struct seq_file *s, struct pinctrl_setting const *setting);
struct pinctrl_map const *map);
void pinmux_put(struct pinctrl *p);
int pinmux_enable(struct pinctrl *p);
void pinmux_disable(struct pinctrl *p);
void pinmux_init_device_debugfs(struct dentry *devroot, void pinmux_init_device_debugfs(struct dentry *devroot,
struct pinctrl_dev *pctldev); struct pinctrl_dev *pctldev);
void pinmux_dbg_show(struct seq_file *s, struct pinctrl *p);
#else #else
@ -64,28 +60,23 @@ static inline int pinmux_gpio_direction(struct pinctrl_dev *pctldev,
return 0; return 0;
} }
static inline void pinmux_init_pinctrl_handle(struct pinctrl *p) static inline int pinmux_map_to_setting(struct pinctrl_map const *map,
{ struct pinctrl_setting *setting)
}
static inline int pinmux_apply_muxmap(struct pinctrl_dev *pctldev,
struct pinctrl *p,
struct device *dev,
const char *devname,
struct pinctrl_map const *map)
{ {
return 0; return 0;
} }
static inline void pinmux_put(struct pinctrl *p) static inline void pinmux_free_setting(struct pinctrl_setting const *setting)
{ {
} }
static inline int pinmux_enable(struct pinctrl *p) static inline int pinmux_enable_setting(struct pinctrl_setting const *setting)
{ {
return 0;
} }
static inline void pinmux_disable(struct pinctrl *p) static inline void pinmux_disable_setting(
struct pinctrl_setting const *setting)
{ {
} }