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pinctrl: enhance mapping table to support pin config operations

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The pinctrl mapping table can now contain entries to:
* Set the mux function of a pin group
* Apply a set of pin config options to a pin or a group

This allows pinctrl_select_state() to apply pin configs settings as well
as mux settings.

v3: Fix find_pinctrl() to iterate over the correct list.
   s/_MUX_CONFIGS_/_CONFIGS_/ in mapping table macros.
   Fix documentation to use correct mapping table macro.
v2: Added numerous extra PIN_MAP_*() special-case macros.
   Fixed kerneldoc typo. Delete pinctrl_get_pin_id() and
   replace it with pin_get_from_name(). Various minor fixes.
   Updates due to rebase.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
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 13:05:48 -07:00 committed by Linus Walleij
parent 6e5e959dde
commit 1e2082b520
9 changed files with 612 additions and 109 deletions
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76
Documentation/pinctrl.txt
View file

@ -206,14 +206,21 @@ using a certain resistor value - pull up and pull down - so that the pin has a
stable value when nothing is driving the rail it is connected to, or when it's
unconnected.
For example, a platform may do this:
Pin configuration can be programmed either using the explicit APIs described
immediately below, or by adding configuration entries into the mapping table;
see section "Board/machine configuration" below.
For example, a platform may do the following to pull up a pin to VDD:
#include <linux/pinctrl/consumer.h>
ret = pin_config_set("foo-dev", "FOO_GPIO_PIN", PLATFORM_X_PULL_UP);
To pull up a pin to VDD. The pin configuration driver implements callbacks for
changing pin configuration in the pin controller ops like this:
The format and meaning of the configuration parameter, PLATFORM_X_PULL_UP
above, is entirely defined by the pin controller driver.
The pin configuration driver implements callbacks for changing pin
configuration in the pin controller ops like this:
#include <linux/pinctrl/pinctrl.h>
#include <linux/pinctrl/pinconf.h>
@ -765,7 +772,7 @@ obtain the function "gpioN" where "N" is the global GPIO pin number if no
special GPIO-handler is registered.
Pinmux board/machine configuration
Board/machine configuration
==================================
Boards and machines define how a certain complete running system is put
@ -773,9 +780,9 @@ together, including how GPIOs and devices are muxed, how regulators are
constrained and how the clock tree looks. Of course pinmux settings are also
part of this.
A pinmux config for a machine looks pretty much like a simple regulator
configuration, so for the example array above we want to enable i2c and
spi on the second function mapping:
A pin controller configuration for a machine looks pretty much like a simple
regulator configuration, so for the example array above we want to enable i2c
and spi on the second function mapping:
#include <linux/pinctrl/machine.h>
@ -783,20 +790,23 @@ static const struct pinctrl_map __initdata mapping[] = {
{
.dev_name = "foo-spi.0",
.name = PINCTRL_STATE_DEFAULT,
.type = PIN_MAP_TYPE_MUX_GROUP,
.ctrl_dev_name = "pinctrl-foo",
.function = "spi0",
.data.mux.function = "spi0",
},
{
.dev_name = "foo-i2c.0",
.name = PINCTRL_STATE_DEFAULT,
.type = PIN_MAP_TYPE_MUX_GROUP,
.ctrl_dev_name = "pinctrl-foo",
.function = "i2c0",
.data.mux.function = "i2c0",
},
{
.dev_name = "foo-mmc.0",
.name = PINCTRL_STATE_DEFAULT,
.type = PIN_MAP_TYPE_MUX_GROUP,
.ctrl_dev_name = "pinctrl-foo",
.function = "mmc0",
.data.mux.function = "mmc0",
},
};
@ -817,7 +827,40 @@ it even more compact which assumes you want to use pinctrl-foo and position
0 for mapping, for example:
static struct pinctrl_map __initdata mapping[] = {
PIN_MAP(PINCTRL_STATE_DEFAULT, "pinctrl-foo", "i2c0", "foo-i2c.0"),
PIN_MAP_MUX_GROUP("foo-i2c.o", PINCTRL_STATE_DEFAULT, "pinctrl-foo", NULL, "i2c0"),
};
The mapping table may also contain pin configuration entries. It's common for
each pin/group to have a number of configuration entries that affect it, so
the table entries for configuration reference an array of config parameters
and values. An example using the convenience macros is shown below:
static unsigned long i2c_grp_configs[] = {
FOO_PIN_DRIVEN,
FOO_PIN_PULLUP,
};
static unsigned long i2c_pin_configs[] = {
FOO_OPEN_COLLECTOR,
FOO_SLEW_RATE_SLOW,
};
static struct pinctrl_map __initdata mapping[] = {
PIN_MAP_MUX_GROUP("foo-i2c.0", PINCTRL_STATE_DEFAULT, "pinctrl-foo", "i2c0", "i2c0"),
PIN_MAP_MUX_CONFIGS_GROUP("foo-i2c.0", PINCTRL_STATE_DEFAULT, "pinctrl-foo", "i2c0", i2c_grp_configs),
PIN_MAP_MUX_CONFIGS_PIN("foo-i2c.0", PINCTRL_STATE_DEFAULT, "pinctrl-foo", "i2c0scl", i2c_pin_configs),
PIN_MAP_MUX_CONFIGS_PIN("foo-i2c.0", PINCTRL_STATE_DEFAULT, "pinctrl-foo", "i2c0sda", i2c_pin_configs),
};
Finally, some devices expect the mapping table to contain certain specific
named states. When running on hardware that doesn't need any pin controller
configuration, the mapping table must still contain those named states, in
order to explicitly indicate that the states were provided and intended to
be empty. Table entry macro PIN_MAP_DUMMY_STATE serves the purpose of defining
a named state without causing any pin controller to be programmed:
static struct pinctrl_map __initdata mapping[] = {
PIN_MAP_DUMMY_STATE("foo-i2c.0", PINCTRL_STATE_DEFAULT),
};
@ -831,6 +874,7 @@ As it is possible to map a function to different groups of pins an optional
{
.dev_name = "foo-spi.0",
.name = "spi0-pos-A",
.type = PIN_MAP_TYPE_MUX_GROUP,
.ctrl_dev_name = "pinctrl-foo",
.function = "spi0",
.group = "spi0_0_grp",
@ -838,6 +882,7 @@ As it is possible to map a function to different groups of pins an optional
{
.dev_name = "foo-spi.0",
.name = "spi0-pos-B",
.type = PIN_MAP_TYPE_MUX_GROUP,
.ctrl_dev_name = "pinctrl-foo",
.function = "spi0",
.group = "spi0_1_grp",
@ -857,6 +902,7 @@ case), we define a mapping like this:
{
.dev_name = "foo-mmc.0",
.name = "2bit"
.type = PIN_MAP_TYPE_MUX_GROUP,
.ctrl_dev_name = "pinctrl-foo",
.function = "mmc0",
.group = "mmc0_1_grp",
@ -864,6 +910,7 @@ case), we define a mapping like this:
{
.dev_name = "foo-mmc.0",
.name = "4bit"
.type = PIN_MAP_TYPE_MUX_GROUP,
.ctrl_dev_name = "pinctrl-foo",
.function = "mmc0",
.group = "mmc0_1_grp",
@ -871,6 +918,7 @@ case), we define a mapping like this:
{
.dev_name = "foo-mmc.0",
.name = "4bit"
.type = PIN_MAP_TYPE_MUX_GROUP,
.ctrl_dev_name = "pinctrl-foo",
.function = "mmc0",
.group = "mmc0_2_grp",
@ -878,6 +926,7 @@ case), we define a mapping like this:
{
.dev_name = "foo-mmc.0",
.name = "8bit"
.type = PIN_MAP_TYPE_MUX_GROUP,
.ctrl_dev_name = "pinctrl-foo",
.function = "mmc0",
.group = "mmc0_1_grp",
@ -885,6 +934,7 @@ case), we define a mapping like this:
{
.dev_name = "foo-mmc.0",
.name = "8bit"
.type = PIN_MAP_TYPE_MUX_GROUP,
.ctrl_dev_name = "pinctrl-foo",
.function = "mmc0",
.group = "mmc0_2_grp",
@ -892,6 +942,7 @@ case), we define a mapping like this:
{
.dev_name = "foo-mmc.0",
.name = "8bit"
.type = PIN_MAP_TYPE_MUX_GROUP,
.ctrl_dev_name = "pinctrl-foo",
.function = "mmc0",
.group = "mmc0_3_grp",
@ -1014,6 +1065,7 @@ to the pin controller device name, and the state name is PINCTRL_STATE_DEFAULT.
{
.dev_name = "pinctrl-foo",
.name = PINCTRL_STATE_DEFAULT,
.type = PIN_MAP_TYPE_MUX_GROUP,
.ctrl_dev_name = "pinctrl-foo",
.function = "power_func",
},
@ -1022,7 +1074,7 @@ Since it may be common to request the core to hog a few always-applicable
mux settings on the primary pin controller, there is a convenience macro for
this:
PIN_MAP_SYS_HOG("pinctrl-foo", "power_func")
PIN_MAP_MUX_GROUP_HOG_DEFAULT("pinctrl-foo", NULL /* group */, "power_func")
This gives the exact same result as the above construction.

12
arch/arm/mach-u300/core.c
View file

@ -1608,13 +1608,13 @@ static struct platform_device dma_device = {
/* Pinmux settings */
static struct pinctrl_map __initdata u300_pinmux_map[] = {
/* anonymous maps for chip power and EMIFs */
PIN_MAP_SYS_HOG("pinctrl-u300", "power"),
PIN_MAP_SYS_HOG("pinctrl-u300", "emif0"),
PIN_MAP_SYS_HOG("pinctrl-u300", "emif1"),
PIN_MAP_MUX_GROUP_HOG_DEFAULT("pinctrl-u300", NULL, "power"),
PIN_MAP_MUX_GROUP_HOG_DEFAULT("pinctrl-u300", NULL, "emif0"),
PIN_MAP_MUX_GROUP_HOG_DEFAULT("pinctrl-u300", NULL, "emif1"),
/* per-device maps for MMC/SD, SPI and UART */
PIN_MAP(PINCTRL_STATE_DEFAULT, "pinctrl-u300", "mmc0", "mmci"),
PIN_MAP(PINCTRL_STATE_DEFAULT, "pinctrl-u300", "spi0", "pl022"),
PIN_MAP(PINCTRL_STATE_DEFAULT, "pinctrl-u300", "uart0", "uart0"),
PIN_MAP_MUX_GROUP_DEFAULT("mmci", "pinctrl-u300", NULL, "mmc0"),
PIN_MAP_MUX_GROUP_DEFAULT("pl022", "pinctrl-u300", NULL, "spi0"),
PIN_MAP_MUX_GROUP_DEFAULT("uart0", "pinctrl-u300", NULL, "uart0"),
};
struct u300_mux_hog {

154
drivers/pinctrl/core.c
View file

@ -502,6 +502,9 @@ static int add_setting(struct pinctrl *p, struct pinctrl_map const *map)
if (IS_ERR(state))
return PTR_ERR(state);
if (map->type == PIN_MAP_TYPE_DUMMY_STATE)
return 0;
setting = kzalloc(sizeof(*setting), GFP_KERNEL);
if (setting == NULL) {
dev_err(p->dev,
@ -509,6 +512,8 @@ static int add_setting(struct pinctrl *p, struct pinctrl_map const *map)
return -ENOMEM;
}
setting->type = map->type;
setting->pctldev = get_pinctrl_dev_from_devname(map->ctrl_dev_name);
if (setting->pctldev == NULL) {
dev_err(p->dev, "unknown pinctrl device %s in map entry",
@ -518,7 +523,18 @@ static int add_setting(struct pinctrl *p, struct pinctrl_map const *map)
return -ENODEV;
}
ret = pinmux_map_to_setting(map, setting);
switch (map->type) {
case PIN_MAP_TYPE_MUX_GROUP:
ret = pinmux_map_to_setting(map, setting);
break;
case PIN_MAP_TYPE_CONFIGS_PIN:
case PIN_MAP_TYPE_CONFIGS_GROUP:
ret = pinconf_map_to_setting(map, setting);
break;
default:
ret = -EINVAL;
break;
}
if (ret < 0) {
kfree(setting);
return ret;
@ -533,7 +549,7 @@ static struct pinctrl *find_pinctrl(struct device *dev)
{
struct pinctrl *p;
list_for_each_entry(p, &pinctrldev_list, node)
list_for_each_entry(p, &pinctrl_list, node)
if (p->dev == dev)
return p;
@ -626,9 +642,19 @@ static void pinctrl_put_locked(struct pinctrl *p, bool inlist)
list_for_each_entry_safe(state, n1, &p->states, node) {
list_for_each_entry_safe(setting, n2, &state->settings, node) {
if (state == p->state)
pinmux_disable_setting(setting);
pinmux_free_setting(setting);
switch (setting->type) {
case PIN_MAP_TYPE_MUX_GROUP:
if (state == p->state)
pinmux_disable_setting(setting);
pinmux_free_setting(setting);
break;
case PIN_MAP_TYPE_CONFIGS_PIN:
case PIN_MAP_TYPE_CONFIGS_GROUP:
pinconf_free_setting(setting);
break;
default:
break;
}
list_del(&setting->node);
kfree(setting);
}
@ -703,9 +729,13 @@ static int pinctrl_select_state_locked(struct pinctrl *p,
*/
list_for_each_entry(setting, &p->state->settings, node) {
bool found = false;
if (setting->type != PIN_MAP_TYPE_MUX_GROUP)
continue;
list_for_each_entry(setting2, &state->settings, node) {
if (setting2->group_selector ==
setting->group_selector) {
if (setting2->type != PIN_MAP_TYPE_MUX_GROUP)
continue;
if (setting2->data.mux.group ==
setting->data.mux.group) {
found = true;
break;
}
@ -719,7 +749,18 @@ static int pinctrl_select_state_locked(struct pinctrl *p,
/* Apply all the settings for the new state */
list_for_each_entry(setting, &state->settings, node) {
ret = pinmux_enable_setting(setting);
switch (setting->type) {
case PIN_MAP_TYPE_MUX_GROUP:
ret = pinmux_enable_setting(setting);
break;
case PIN_MAP_TYPE_CONFIGS_PIN:
case PIN_MAP_TYPE_CONFIGS_GROUP:
ret = pinconf_apply_setting(setting);
break;
default:
ret = -EINVAL;
break;
}
if (ret < 0) {
/* FIXME: Difficult to return to prev state */
return ret;
@ -756,33 +797,48 @@ EXPORT_SYMBOL_GPL(pinctrl_select_state);
int pinctrl_register_mappings(struct pinctrl_map const *maps,
unsigned num_maps)
{
int i;
int i, ret;
struct pinctrl_maps *maps_node;
pr_debug("add %d pinmux maps\n", num_maps);
/* First sanity check the new mapping */
for (i = 0; i < num_maps; i++) {
if (!maps[i].dev_name) {
pr_err("failed to register map %s (%d): no device given\n",
maps[i].name, i);
return -EINVAL;
}
if (!maps[i].name) {
pr_err("failed to register map %d: no map name given\n",
i);
return -EINVAL;
}
if (!maps[i].ctrl_dev_name) {
if (maps[i].type != PIN_MAP_TYPE_DUMMY_STATE &&
!maps[i].ctrl_dev_name) {
pr_err("failed to register map %s (%d): no pin control device given\n",
maps[i].name, i);
return -EINVAL;
}
if (!maps[i].function) {
pr_err("failed to register map %s (%d): no function ID given\n",
maps[i].name, i);
return -EINVAL;
}
if (!maps[i].dev_name) {
pr_err("failed to register map %s (%d): no device given\n",
switch (maps[i].type) {
case PIN_MAP_TYPE_DUMMY_STATE:
break;
case PIN_MAP_TYPE_MUX_GROUP:
ret = pinmux_validate_map(&maps[i], i);
if (ret < 0)
return 0;
break;
case PIN_MAP_TYPE_CONFIGS_PIN:
case PIN_MAP_TYPE_CONFIGS_GROUP:
ret = pinconf_validate_map(&maps[i], i);
if (ret < 0)
return 0;
break;
default:
pr_err("failed to register map %s (%d): invalid type given\n",
maps[i].name, i);
return -EINVAL;
}
@ -934,6 +990,22 @@ static int pinctrl_devices_show(struct seq_file *s, void *what)
return 0;
}
static inline const char *map_type(enum pinctrl_map_type type)
{
static const char * const names[] = {
"INVALID",
"DUMMY_STATE",
"MUX_GROUP",
"CONFIGS_PIN",
"CONFIGS_GROUP",
};
if (type >= ARRAY_SIZE(names))
return "UNKNOWN";
return names[type];
}
static int pinctrl_maps_show(struct seq_file *s, void *what)
{
struct pinctrl_maps *maps_node;
@ -945,12 +1017,27 @@ static int pinctrl_maps_show(struct seq_file *s, void *what)
mutex_lock(&pinctrl_mutex);
for_each_maps(maps_node, i, map) {
seq_printf(s, "%s:\n", map->name);
seq_printf(s, " device: %s\n", map->dev_name);
seq_printf(s, " controlling device %s\n", map->ctrl_dev_name);
seq_printf(s, " function: %s\n", map->function);
seq_printf(s, " group: %s\n", map->group ? map->group :
"(default)");
seq_printf(s, "device %s\nstate %s\ntype %s (%d)\n",
map->dev_name, map->name, map_type(map->type),
map->type);
if (map->type != PIN_MAP_TYPE_DUMMY_STATE)
seq_printf(s, "controlling device %s\n",
map->ctrl_dev_name);
switch (map->type) {
case PIN_MAP_TYPE_MUX_GROUP:
pinmux_show_map(s, map);
break;
case PIN_MAP_TYPE_CONFIGS_PIN:
case PIN_MAP_TYPE_CONFIGS_GROUP:
pinconf_show_map(s, map);
break;
default:
break;
}
seq_printf(s, "\n");
}
mutex_unlock(&pinctrl_mutex);
@ -977,8 +1064,23 @@ static int pinctrl_show(struct seq_file *s, void *what)
seq_printf(s, " state: %s\n", state->name);
list_for_each_entry(setting, &state->settings, node) {
seq_printf(s, " ");
pinmux_dbg_show(s, setting);
struct pinctrl_dev *pctldev = setting->pctldev;
seq_printf(s, " type: %s controller %s ",
map_type(setting->type),
pinctrl_dev_get_name(pctldev));
switch (setting->type) {
case PIN_MAP_TYPE_MUX_GROUP:
pinmux_show_setting(s, setting);
break;
case PIN_MAP_TYPE_CONFIGS_PIN:
case PIN_MAP_TYPE_CONFIGS_GROUP:
pinconf_show_setting(s, setting);
break;
default:
break;
}
}
}
}

35
drivers/pinctrl/core.h
View file

@ -71,18 +71,45 @@ struct pinctrl_state {
struct list_head settings;
};
/**
* struct pinctrl_setting_mux - setting data for MAP_TYPE_MUX_GROUP
* @group: the group selector to program
* @func: the function selector to program
*/
struct pinctrl_setting_mux {
unsigned group;
unsigned func;
};
/**
* struct pinctrl_setting_configs - setting data for MAP_TYPE_CONFIGS_*
* @group_or_pin: the group selector or pin ID to program
* @configs: a pointer to an array of config parameters/values to program into
* hardware. Each individual pin controller defines the format and meaning
* of config parameters.
* @num_configs: the number of entries in array @configs
*/
struct pinctrl_setting_configs {
unsigned group_or_pin;
unsigned long *configs;
unsigned num_configs;
};
/**
* struct pinctrl_setting - an individual mux setting
* @node: list node for struct pinctrl_settings's @settings field
* @type: the type of setting
* @pctldev: pin control device handling to be programmed
* @group_selector: the group selector to program
* @func_selector: the function selector to program
* @data: Data specific to the setting type
*/
struct pinctrl_setting {
struct list_head node;
enum pinctrl_map_type type;
struct pinctrl_dev *pctldev;
unsigned group_selector;
unsigned func_selector;
union {
struct pinctrl_setting_mux mux;
struct pinctrl_setting_configs configs;
} data;
};
/**

165
drivers/pinctrl/pinconf.c
View file

@ -36,6 +36,24 @@ int pinconf_check_ops(struct pinctrl_dev *pctldev)
return 0;
}
int pinconf_validate_map(struct pinctrl_map const *map, int i)
{
if (!map->data.configs.group_or_pin) {
pr_err("failed to register map %s (%d): no group/pin given\n",
map->name, i);
return -EINVAL;
}
if (map->data.configs.num_configs &&
!map->data.configs.configs) {
pr_err("failed to register map %s (%d): no configs ptr given\n",
map->name, i);
return -EINVAL;
}
return 0;
}
static int pin_config_get_for_pin(struct pinctrl_dev *pctldev, unsigned pin,
unsigned long *config)
{
@ -260,8 +278,155 @@ int pin_config_group_set(const char *dev_name, const char *pin_group,
}
EXPORT_SYMBOL(pin_config_group_set);
int pinconf_map_to_setting(struct pinctrl_map const *map,
struct pinctrl_setting *setting)
{
struct pinctrl_dev *pctldev = setting->pctldev;
switch (setting->type) {
case PIN_MAP_TYPE_CONFIGS_PIN:
setting->data.configs.group_or_pin =
pin_get_from_name(pctldev,
map->data.configs.group_or_pin);
if (setting->data.configs.group_or_pin < 0)
return setting->data.configs.group_or_pin;
break;
case PIN_MAP_TYPE_CONFIGS_GROUP:
setting->data.configs.group_or_pin =
pinctrl_get_group_selector(pctldev,
map->data.configs.group_or_pin);
if (setting->data.configs.group_or_pin < 0)
return setting->data.configs.group_or_pin;
break;
default:
return -EINVAL;
}
setting->data.configs.num_configs = map->data.configs.num_configs;
setting->data.configs.configs = map->data.configs.configs;
return 0;
}
void pinconf_free_setting(struct pinctrl_setting const *setting)
{
}
int pinconf_apply_setting(struct pinctrl_setting const *setting)
{
struct pinctrl_dev *pctldev = setting->pctldev;
const struct pinconf_ops *ops = pctldev->desc->confops;
int i, ret;
if (!ops) {
dev_err(pctldev->dev, "missing confops\n");
return -EINVAL;
}
switch (setting->type) {
case PIN_MAP_TYPE_CONFIGS_PIN:
if (!ops->pin_config_set) {
dev_err(pctldev->dev, "missing pin_config_set op\n");
return -EINVAL;
}
for (i = 0; i < setting->data.configs.num_configs; i++) {
ret = ops->pin_config_set(pctldev,
setting->data.configs.group_or_pin,
setting->data.configs.configs[i]);
if (ret < 0) {
dev_err(pctldev->dev,
"pin_config_set op failed for pin %d config %08lx\n",
setting->data.configs.group_or_pin,
setting->data.configs.configs[i]);
return ret;
}
}
break;
case PIN_MAP_TYPE_CONFIGS_GROUP:
if (!ops->pin_config_group_set) {
dev_err(pctldev->dev,
"missing pin_config_group_set op\n");
return -EINVAL;
}
for (i = 0; i < setting->data.configs.num_configs; i++) {
ret = ops->pin_config_group_set(pctldev,
setting->data.configs.group_or_pin,
setting->data.configs.configs[i]);
if (ret < 0) {
dev_err(pctldev->dev,
"pin_config_group_set op failed for group %d config %08lx\n",
setting->data.configs.group_or_pin,
setting->data.configs.configs[i]);
return ret;
}
}
break;
default:
return -EINVAL;
}
return 0;
}
#ifdef CONFIG_DEBUG_FS
void pinconf_show_map(struct seq_file *s, struct pinctrl_map const *map)
{
int i;
switch (map->type) {
case PIN_MAP_TYPE_CONFIGS_PIN:
seq_printf(s, "pin ");
break;
case PIN_MAP_TYPE_CONFIGS_GROUP:
seq_printf(s, "group ");
break;
default:
break;
}
seq_printf(s, "%s\n", map->data.configs.group_or_pin);
for (i = 0; i < map->data.configs.num_configs; i++)
seq_printf(s, "config %08lx\n", map->data.configs.configs[i]);
}
void pinconf_show_setting(struct seq_file *s,
struct pinctrl_setting const *setting)
{
struct pinctrl_dev *pctldev = setting->pctldev;
const struct pinctrl_ops *pctlops = pctldev->desc->pctlops;
struct pin_desc *desc;
int i;
switch (setting->type) {
case PIN_MAP_TYPE_CONFIGS_PIN:
desc = pin_desc_get(setting->pctldev,
setting->data.configs.group_or_pin);
seq_printf(s, "pin %s (%d)",
desc->name ? desc->name : "unnamed",
setting->data.configs.group_or_pin);
break;
case PIN_MAP_TYPE_CONFIGS_GROUP:
seq_printf(s, "group %s (%d)",
pctlops->get_group_name(pctldev,
setting->data.configs.group_or_pin),
setting->data.configs.group_or_pin);
break;
default:
break;
}
/*
* FIXME: We should really get the pin controler to dump the config
* values, so they can be decoded to something meaningful.
*/
for (i = 0; i < setting->data.configs.num_configs; i++)
seq_printf(s, " %08lx", setting->data.configs.configs[i]);
seq_printf(s, "\n");
}
static void pinconf_dump_pin(struct pinctrl_dev *pctldev,
struct seq_file *s, int pin)
{

40
drivers/pinctrl/pinconf.h
View file

@ -15,6 +15,16 @@
int pinconf_check_ops(struct pinctrl_dev *pctldev);
int pinconf_validate_map(struct pinctrl_map const *map, int i);
int pinconf_map_to_setting(struct pinctrl_map const *map,
struct pinctrl_setting *setting);
void pinconf_free_setting(struct pinctrl_setting const *setting);
int pinconf_apply_setting(struct pinctrl_setting const *setting);
void pinconf_show_map(struct seq_file *s, struct pinctrl_map const *map);
void pinconf_show_setting(struct seq_file *s,
struct pinctrl_setting const *setting);
void pinconf_init_device_debugfs(struct dentry *devroot,
struct pinctrl_dev *pctldev);
@ -25,6 +35,36 @@ static inline int pinconf_check_ops(struct pinctrl_dev *pctldev)
return 0;
}
static inline int pinconf_validate_map(struct pinctrl_map const *map, int i)
{
return 0;
}
static inline int pinconf_map_to_setting(struct pinctrl_map const *map,
struct pinctrl_setting *setting)
{
return 0;
}
static inline void pinconf_free_setting(struct pinctrl_setting const *setting)
{
}
static inline int pinconf_apply_setting(struct pinctrl_setting const *setting)
{
return 0;
}
static inline void pinconf_show_map(struct seq_file *s,
struct pinctrl_map const *map)
{
}
static inline void pinconf_show_setting(struct seq_file *s,
struct pinctrl_setting const *setting)
{
}
static inline void pinconf_init_device_debugfs(struct dentry *devroot,
struct pinctrl_dev *pctldev)
{

69
drivers/pinctrl/pinmux.c
View file

@ -58,6 +58,17 @@ int pinmux_check_ops(struct pinctrl_dev *pctldev)
return 0;
}
int pinmux_validate_map(struct pinctrl_map const *map, int i)
{
if (!map->data.mux.function) {
pr_err("failed to register map %s (%d): no function given\n",
map->name, i);
return -EINVAL;
}
return 0;
}
/**
* pin_request() - request a single pin to be muxed in, typically for GPIO
* @pin: the pin number in the global pin space
@ -284,21 +295,21 @@ int pinmux_map_to_setting(struct pinctrl_map const *map,
const unsigned *pins;
unsigned num_pins;
setting->func_selector =
pinmux_func_name_to_selector(pctldev, map->function);
if (setting->func_selector < 0)
return setting->func_selector;
setting->data.mux.func =
pinmux_func_name_to_selector(pctldev, map->data.mux.function);
if (setting->data.mux.func < 0)
return setting->data.mux.func;
ret = pmxops->get_function_groups(pctldev, setting->func_selector,
ret = pmxops->get_function_groups(pctldev, setting->data.mux.func,
&groups, &num_groups);
if (ret < 0)
return ret;
if (!num_groups)
return -EINVAL;
if (map->group) {
if (map->data.mux.group) {
bool found = false;
group = map->group;
group = map->data.mux.group;
for (i = 0; i < num_groups; i++) {
if (!strcmp(group, groups[i])) {
found = true;
@ -311,17 +322,16 @@ int pinmux_map_to_setting(struct pinctrl_map const *map,
group = groups[0];
}
setting->group_selector =
pinctrl_get_group_selector(pctldev, group);
if (setting->group_selector < 0)
return setting->group_selector;
setting->data.mux.group = pinctrl_get_group_selector(pctldev, group);
if (setting->data.mux.group < 0)
return setting->data.mux.group;
ret = pctlops->get_group_pins(pctldev, setting->group_selector,
&pins, &num_pins);
ret = pctlops->get_group_pins(pctldev, setting->data.mux.group, &pins,
&num_pins);
if (ret) {
dev_err(pctldev->dev,
"could not get pins for device %s group selector %d\n",
pinctrl_dev_get_name(pctldev), setting->group_selector);
pinctrl_dev_get_name(pctldev), setting->data.mux.group);
return -ENODEV;
}
@ -352,12 +362,12 @@ void pinmux_free_setting(struct pinctrl_setting const *setting)
int ret;
int i;
ret = pctlops->get_group_pins(pctldev, setting->group_selector,
ret = pctlops->get_group_pins(pctldev, setting->data.mux.group,
&pins, &num_pins);
if (ret) {
dev_err(pctldev->dev,
"could not get pins for device %s group selector %d\n",
pinctrl_dev_get_name(pctldev), setting->group_selector);
pinctrl_dev_get_name(pctldev), setting->data.mux.group);
return;
}
@ -370,8 +380,8 @@ int pinmux_enable_setting(struct pinctrl_setting const *setting)
struct pinctrl_dev *pctldev = setting->pctldev;
const struct pinmux_ops *ops = pctldev->desc->pmxops;
return ops->enable(pctldev, setting->func_selector,
setting->group_selector);
return ops->enable(pctldev, setting->data.mux.func,
setting->data.mux.group);
}
void pinmux_disable_setting(struct pinctrl_setting const *setting)
@ -379,7 +389,7 @@ void pinmux_disable_setting(struct pinctrl_setting const *setting)
struct pinctrl_dev *pctldev = setting->pctldev;
const struct pinmux_ops *ops = pctldev->desc->pmxops;
ops->disable(pctldev, setting->func_selector, setting->group_selector);
ops->disable(pctldev, setting->data.mux.func, setting->data.mux.group);
}
#ifdef CONFIG_DEBUG_FS
@ -456,18 +466,25 @@ static int pinmux_pins_show(struct seq_file *s, void *what)
return 0;
}
void pinmux_dbg_show(struct seq_file *s, struct pinctrl_setting const *setting)
void pinmux_show_map(struct seq_file *s, struct pinctrl_map const *map)
{
seq_printf(s, "group %s\nfunction %s\n",
map->data.mux.group ? map->data.mux.group : "(default)",
map->data.mux.function);
}
void pinmux_show_setting(struct seq_file *s,
struct pinctrl_setting const *setting)
{
struct pinctrl_dev *pctldev = setting->pctldev;
const struct pinmux_ops *pmxops = pctldev->desc->pmxops;
const struct pinctrl_ops *pctlops = pctldev->desc->pctlops;
seq_printf(s, "controller: %s group: %s (%u) function: %s (%u)\n",
pinctrl_dev_get_name(pctldev),
pctlops->get_group_name(pctldev, setting->group_selector),
setting->group_selector,
pmxops->get_function_name(pctldev, setting->func_selector),
setting->func_selector);
seq_printf(s, "group: %s (%u) function: %s (%u)\n",
pctlops->get_group_name(pctldev, setting->data.mux.group),
setting->data.mux.group,
pmxops->get_function_name(pctldev, setting->data.mux.func),
setting->data.mux.func);
}
static int pinmux_functions_open(struct inode *inode, struct file *file)

25
drivers/pinctrl/pinmux.h
View file

@ -14,6 +14,8 @@
int pinmux_check_ops(struct pinctrl_dev *pctldev);
int pinmux_validate_map(struct pinctrl_map const *map, int i);
int pinmux_request_gpio(struct pinctrl_dev *pctldev,
struct pinctrl_gpio_range *range,
unsigned pin, unsigned gpio);
@ -29,7 +31,9 @@ void pinmux_free_setting(struct pinctrl_setting const *setting);
int pinmux_enable_setting(struct pinctrl_setting const *setting);
void pinmux_disable_setting(struct pinctrl_setting const *setting);
void pinmux_dbg_show(struct seq_file *s, struct pinctrl_setting const *setting);
void pinmux_show_map(struct seq_file *s, struct pinctrl_map const *map);
void pinmux_show_setting(struct seq_file *s,
struct pinctrl_setting const *setting);
void pinmux_init_device_debugfs(struct dentry *devroot,
struct pinctrl_dev *pctldev);
@ -40,6 +44,11 @@ static inline int pinmux_check_ops(struct pinctrl_dev *pctldev)
return 0;
}
static inline int pinmux_validate_map(struct pinctrl_map const *map, int i)
{
return 0;
}
static inline int pinmux_request_gpio(struct pinctrl_dev *pctldev,
struct pinctrl_gpio_range *range,
unsigned pin, unsigned gpio)
@ -80,13 +89,19 @@ static inline void pinmux_disable_setting(
{
}
static inline void pinmux_show_map(struct seq_file *s,
struct pinctrl_map const *map)
{
}
static inline void pinmux_show_setting(struct seq_file *s,
struct pinctrl_setting const *setting)
{
}
static inline void pinmux_init_device_debugfs(struct dentry *devroot,
struct pinctrl_dev *pctldev)
{
}
static inline void pinmux_dbg_show(struct seq_file *s, struct pinctrl *p)
{
}
#endif

145
include/linux/pinctrl/machine.h
View file

@ -14,6 +14,41 @@
#include "pinctrl.h"
enum pinctrl_map_type {
PIN_MAP_TYPE_INVALID,
PIN_MAP_TYPE_DUMMY_STATE,
PIN_MAP_TYPE_MUX_GROUP,
PIN_MAP_TYPE_CONFIGS_PIN,
PIN_MAP_TYPE_CONFIGS_GROUP,
};
/**
* struct pinctrl_map_mux - mapping table content for MAP_TYPE_MUX_GROUP
* @group: the name of the group whose mux function is to be configured. This
* field may be left NULL, and the first applicable group for the function
* will be used.
* @function: the mux function to select for the group
*/
struct pinctrl_map_mux {
const char *group;
const char *function;
};
/**
* struct pinctrl_map_configs - mapping table content for MAP_TYPE_CONFIGS_*
* @group_or_pin: the name of the pin or group whose configuration parameters
* are to be configured.
* @configs: a pointer to an array of config parameters/values to program into
* hardware. Each individual pin controller defines the format and meaning
* of config parameters.
* @num_configs: the number of entries in array @configs
*/
struct pinctrl_map_configs {
const char *group_or_pin;
unsigned long *configs;
unsigned num_configs;
};
/**
* struct pinctrl_map - boards/machines shall provide this map for devices
* @dev_name: the name of the device using this specific mapping, the name
@ -22,46 +57,96 @@
* hogged by the driver itself upon registration
* @name: the name of this specific map entry for the particular machine.
* This is the parameter passed to pinmux_lookup_state()
* @type: the type of mapping table entry
* @ctrl_dev_name: the name of the device controlling this specific mapping,
* the name must be the same as in your struct device*
* @group: sometimes a function can map to different pin groups, so this
* selects a certain specific pin group to activate for the function, if
* left as NULL, the first applicable group will be used
* @function: a function in the driver to use for this mapping, the driver
* will lookup the function referenced by this ID on the specified
* pin control device
* the name must be the same as in your struct device*. This field is not
* used for PIN_MAP_TYPE_DUMMY_STATE
* @data: Data specific to the mapping type
*/
struct pinctrl_map {
const char *dev_name;
const char *name;
enum pinctrl_map_type type;
const char *ctrl_dev_name;
const char *group;
const char *function;
union {
struct pinctrl_map_mux mux;
struct pinctrl_map_configs configs;
} data;
};
/*
* Convenience macro to set a simple map from a certain pin controller and a
* certain function to a named device
*/
#define PIN_MAP(a, b, c, d) \
{ .name = a, .ctrl_dev_name = b, .function = c, .dev_name = d }
/* Convenience macros to create mapping table entries */
/*
* Convenience macro to map a system function onto a certain pinctrl device,
* to be hogged by the pin control core until the system shuts down.
*/
#define PIN_MAP_SYS_HOG(a, b) \
{ .name = PINCTRL_STATE_DEFAULT, .ctrl_dev_name = a, .dev_name = a, \
.function = b, }
#define PIN_MAP_DUMMY_STATE(dev, state) \
{ \
.dev_name = dev, \
.name = state, \
.type = PIN_MAP_TYPE_DUMMY_STATE, \
}
/*
* Convenience macro to map a system function onto a certain pinctrl device
* using a specified group, to be hogged by the pin control core until the
* system shuts down.
*/
#define PIN_MAP_SYS_HOG_GROUP(a, b, c) \
{ .name = PINCTRL_STATE_DEFAULT, .ctrl_dev_name = a, .dev_name = a, \
.function = b, .group = c, }
#define PIN_MAP_MUX_GROUP(dev, state, pinctrl, grp, func) \
{ \
.dev_name = dev, \
.name = state, \
.type = PIN_MAP_TYPE_MUX_GROUP, \
.ctrl_dev_name = pinctrl, \
.data.mux = { \
.group = grp, \
.function = func, \
}, \
}
#define PIN_MAP_MUX_GROUP_DEFAULT(dev, pinctrl, grp, func) \
PIN_MAP_MUX_GROUP(dev, PINCTRL_STATE_DEFAULT, pinctrl, grp, func)
#define PIN_MAP_MUX_GROUP_HOG(dev, state, grp, func) \
PIN_MAP_MUX_GROUP(dev, state, dev, grp, func)
#define PIN_MAP_MUX_GROUP_HOG_DEFAULT(dev, grp, func) \
PIN_MAP_MUX_GROUP(dev, PINCTRL_STATE_DEFAULT, dev, grp, func)
#define PIN_MAP_CONFIGS_PIN(dev, state, pinctrl, pin, cfgs) \
{ \
.dev_name = dev, \
.name = state, \
.type = PIN_MAP_TYPE_CONFIGS_PIN, \
.ctrl_dev_name = pinctrl, \
.data.configs = { \
.group_or_pin = pin, \
.configs = cfgs, \
.num_configs = ARRAY_SIZE(cfgs), \
}, \
}
#define PIN_MAP_CONFIGS_PIN_DEFAULT(dev, pinctrl, pin, cfgs) \
PIN_MAP_CONFIGS_PIN(dev, PINCTRL_STATE_DEFAULT, pinctrl, pin, cfgs)
#define PIN_MAP_CONFIGS_PIN_HOG(dev, state, pin, cfgs) \
PIN_MAP_CONFIGS_PIN(dev, state, dev, pin, cfgs)
#define PIN_MAP_CONFIGS_PIN_HOG_DEFAULT(dev, pin, cfgs) \
PIN_MAP_CONFIGS_PIN(dev, PINCTRL_STATE_DEFAULT, dev, pin, cfgs)
#define PIN_MAP_CONFIGS_GROUP(dev, state, pinctrl, grp, cfgs) \
{ \
.dev_name = dev, \
.name = state, \
.type = PIN_MAP_TYPE_CONFIGS_GROUP, \
.ctrl_dev_name = pinctrl, \
.data.configs = { \
.group_or_pin = grp, \
.configs = cfgs, \
.num_configs = ARRAY_SIZE(cfgs), \
}, \
}
#define PIN_MAP_CONFIGS_GROUP_DEFAULT(dev, pinctrl, grp, cfgs) \
PIN_MAP_CONFIGS_GROUP(dev, PINCTRL_STATE_DEFAULT, pinctrl, grp, cfgs)
#define PIN_MAP_CONFIGS_GROUP_HOG(dev, state, grp, cfgs) \
PIN_MAP_CONFIGS_GROUP(dev, state, dev, grp, cfgs)
#define PIN_MAP_CONFIGS_GROUP_HOG_DEFAULT(dev, grp, cfgs) \
PIN_MAP_CONFIGS_GROUP(dev, PINCTRL_STATE_DEFAULT, dev, grp, cfgs)
#ifdef CONFIG_PINMUX