![Gregory CLEMENT](/assets/img/avatar_default.png)
The offset property of the pinctrl node, when a regmap is used in the device tree, was never used nor documented in the binding. Moreover, the compatible string is enough to let the driver know which offset using. So this patch removes the property and move the information at the driver level. Reviewed-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
838 lines
22 KiB
C
838 lines
22 KiB
C
/*
|
|
* Marvell MVEBU pinctrl core driver
|
|
*
|
|
* Authors: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
|
|
* Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*/
|
|
|
|
#include <linux/platform_device.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/io.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_address.h>
|
|
#include <linux/of_platform.h>
|
|
#include <linux/err.h>
|
|
#include <linux/gpio.h>
|
|
#include <linux/pinctrl/machine.h>
|
|
#include <linux/pinctrl/pinconf.h>
|
|
#include <linux/pinctrl/pinctrl.h>
|
|
#include <linux/pinctrl/pinmux.h>
|
|
#include <linux/mfd/syscon.h>
|
|
#include <linux/regmap.h>
|
|
|
|
#include "pinctrl-mvebu.h"
|
|
|
|
#define MPPS_PER_REG 8
|
|
#define MPP_BITS 4
|
|
#define MPP_MASK 0xf
|
|
|
|
struct mvebu_pinctrl_function {
|
|
const char *name;
|
|
const char **groups;
|
|
unsigned num_groups;
|
|
};
|
|
|
|
struct mvebu_pinctrl_group {
|
|
const char *name;
|
|
const struct mvebu_mpp_ctrl *ctrl;
|
|
struct mvebu_mpp_ctrl_data *data;
|
|
struct mvebu_mpp_ctrl_setting *settings;
|
|
unsigned num_settings;
|
|
unsigned gid;
|
|
unsigned *pins;
|
|
unsigned npins;
|
|
};
|
|
|
|
struct mvebu_pinctrl {
|
|
struct device *dev;
|
|
struct pinctrl_dev *pctldev;
|
|
struct pinctrl_desc desc;
|
|
struct mvebu_pinctrl_group *groups;
|
|
unsigned num_groups;
|
|
struct mvebu_pinctrl_function *functions;
|
|
unsigned num_functions;
|
|
u8 variant;
|
|
};
|
|
|
|
int mvebu_mmio_mpp_ctrl_get(struct mvebu_mpp_ctrl_data *data,
|
|
unsigned int pid, unsigned long *config)
|
|
{
|
|
unsigned off = (pid / MVEBU_MPPS_PER_REG) * MVEBU_MPP_BITS;
|
|
unsigned shift = (pid % MVEBU_MPPS_PER_REG) * MVEBU_MPP_BITS;
|
|
|
|
*config = (readl(data->base + off) >> shift) & MVEBU_MPP_MASK;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int mvebu_mmio_mpp_ctrl_set(struct mvebu_mpp_ctrl_data *data,
|
|
unsigned int pid, unsigned long config)
|
|
{
|
|
unsigned off = (pid / MVEBU_MPPS_PER_REG) * MVEBU_MPP_BITS;
|
|
unsigned shift = (pid % MVEBU_MPPS_PER_REG) * MVEBU_MPP_BITS;
|
|
unsigned long reg;
|
|
|
|
reg = readl(data->base + off) & ~(MVEBU_MPP_MASK << shift);
|
|
writel(reg | (config << shift), data->base + off);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct mvebu_pinctrl_group *mvebu_pinctrl_find_group_by_pid(
|
|
struct mvebu_pinctrl *pctl, unsigned pid)
|
|
{
|
|
unsigned n;
|
|
for (n = 0; n < pctl->num_groups; n++) {
|
|
if (pid >= pctl->groups[n].pins[0] &&
|
|
pid < pctl->groups[n].pins[0] +
|
|
pctl->groups[n].npins)
|
|
return &pctl->groups[n];
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static struct mvebu_pinctrl_group *mvebu_pinctrl_find_group_by_name(
|
|
struct mvebu_pinctrl *pctl, const char *name)
|
|
{
|
|
unsigned n;
|
|
for (n = 0; n < pctl->num_groups; n++) {
|
|
if (strcmp(name, pctl->groups[n].name) == 0)
|
|
return &pctl->groups[n];
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static struct mvebu_mpp_ctrl_setting *mvebu_pinctrl_find_setting_by_val(
|
|
struct mvebu_pinctrl *pctl, struct mvebu_pinctrl_group *grp,
|
|
unsigned long config)
|
|
{
|
|
unsigned n;
|
|
for (n = 0; n < grp->num_settings; n++) {
|
|
if (config == grp->settings[n].val) {
|
|
if (!pctl->variant || (pctl->variant &
|
|
grp->settings[n].variant))
|
|
return &grp->settings[n];
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static struct mvebu_mpp_ctrl_setting *mvebu_pinctrl_find_setting_by_name(
|
|
struct mvebu_pinctrl *pctl, struct mvebu_pinctrl_group *grp,
|
|
const char *name)
|
|
{
|
|
unsigned n;
|
|
for (n = 0; n < grp->num_settings; n++) {
|
|
if (strcmp(name, grp->settings[n].name) == 0) {
|
|
if (!pctl->variant || (pctl->variant &
|
|
grp->settings[n].variant))
|
|
return &grp->settings[n];
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static struct mvebu_mpp_ctrl_setting *mvebu_pinctrl_find_gpio_setting(
|
|
struct mvebu_pinctrl *pctl, struct mvebu_pinctrl_group *grp)
|
|
{
|
|
unsigned n;
|
|
for (n = 0; n < grp->num_settings; n++) {
|
|
if (grp->settings[n].flags &
|
|
(MVEBU_SETTING_GPO | MVEBU_SETTING_GPI)) {
|
|
if (!pctl->variant || (pctl->variant &
|
|
grp->settings[n].variant))
|
|
return &grp->settings[n];
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static struct mvebu_pinctrl_function *mvebu_pinctrl_find_function_by_name(
|
|
struct mvebu_pinctrl *pctl, const char *name)
|
|
{
|
|
unsigned n;
|
|
for (n = 0; n < pctl->num_functions; n++) {
|
|
if (strcmp(name, pctl->functions[n].name) == 0)
|
|
return &pctl->functions[n];
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static int mvebu_pinconf_group_get(struct pinctrl_dev *pctldev,
|
|
unsigned gid, unsigned long *config)
|
|
{
|
|
struct mvebu_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
|
|
struct mvebu_pinctrl_group *grp = &pctl->groups[gid];
|
|
|
|
if (!grp->ctrl)
|
|
return -EINVAL;
|
|
|
|
return grp->ctrl->mpp_get(grp->data, grp->pins[0], config);
|
|
}
|
|
|
|
static int mvebu_pinconf_group_set(struct pinctrl_dev *pctldev,
|
|
unsigned gid, unsigned long *configs,
|
|
unsigned num_configs)
|
|
{
|
|
struct mvebu_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
|
|
struct mvebu_pinctrl_group *grp = &pctl->groups[gid];
|
|
int i, ret;
|
|
|
|
if (!grp->ctrl)
|
|
return -EINVAL;
|
|
|
|
for (i = 0; i < num_configs; i++) {
|
|
ret = grp->ctrl->mpp_set(grp->data, grp->pins[0], configs[i]);
|
|
if (ret)
|
|
return ret;
|
|
} /* for each config */
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void mvebu_pinconf_group_dbg_show(struct pinctrl_dev *pctldev,
|
|
struct seq_file *s, unsigned gid)
|
|
{
|
|
struct mvebu_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
|
|
struct mvebu_pinctrl_group *grp = &pctl->groups[gid];
|
|
struct mvebu_mpp_ctrl_setting *curr;
|
|
unsigned long config;
|
|
unsigned n;
|
|
|
|
if (mvebu_pinconf_group_get(pctldev, gid, &config))
|
|
return;
|
|
|
|
curr = mvebu_pinctrl_find_setting_by_val(pctl, grp, config);
|
|
|
|
if (curr) {
|
|
seq_printf(s, "current: %s", curr->name);
|
|
if (curr->subname)
|
|
seq_printf(s, "(%s)", curr->subname);
|
|
if (curr->flags & (MVEBU_SETTING_GPO | MVEBU_SETTING_GPI)) {
|
|
seq_putc(s, '(');
|
|
if (curr->flags & MVEBU_SETTING_GPI)
|
|
seq_putc(s, 'i');
|
|
if (curr->flags & MVEBU_SETTING_GPO)
|
|
seq_putc(s, 'o');
|
|
seq_putc(s, ')');
|
|
}
|
|
} else {
|
|
seq_puts(s, "current: UNKNOWN");
|
|
}
|
|
|
|
if (grp->num_settings > 1) {
|
|
seq_puts(s, ", available = [");
|
|
for (n = 0; n < grp->num_settings; n++) {
|
|
if (curr == &grp->settings[n])
|
|
continue;
|
|
|
|
/* skip unsupported settings for this variant */
|
|
if (pctl->variant &&
|
|
!(pctl->variant & grp->settings[n].variant))
|
|
continue;
|
|
|
|
seq_printf(s, " %s", grp->settings[n].name);
|
|
if (grp->settings[n].subname)
|
|
seq_printf(s, "(%s)", grp->settings[n].subname);
|
|
if (grp->settings[n].flags &
|
|
(MVEBU_SETTING_GPO | MVEBU_SETTING_GPI)) {
|
|
seq_putc(s, '(');
|
|
if (grp->settings[n].flags & MVEBU_SETTING_GPI)
|
|
seq_putc(s, 'i');
|
|
if (grp->settings[n].flags & MVEBU_SETTING_GPO)
|
|
seq_putc(s, 'o');
|
|
seq_putc(s, ')');
|
|
}
|
|
}
|
|
seq_puts(s, " ]");
|
|
}
|
|
}
|
|
|
|
static const struct pinconf_ops mvebu_pinconf_ops = {
|
|
.pin_config_group_get = mvebu_pinconf_group_get,
|
|
.pin_config_group_set = mvebu_pinconf_group_set,
|
|
.pin_config_group_dbg_show = mvebu_pinconf_group_dbg_show,
|
|
};
|
|
|
|
static int mvebu_pinmux_get_funcs_count(struct pinctrl_dev *pctldev)
|
|
{
|
|
struct mvebu_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
|
|
|
|
return pctl->num_functions;
|
|
}
|
|
|
|
static const char *mvebu_pinmux_get_func_name(struct pinctrl_dev *pctldev,
|
|
unsigned fid)
|
|
{
|
|
struct mvebu_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
|
|
|
|
return pctl->functions[fid].name;
|
|
}
|
|
|
|
static int mvebu_pinmux_get_groups(struct pinctrl_dev *pctldev, unsigned fid,
|
|
const char * const **groups,
|
|
unsigned * const num_groups)
|
|
{
|
|
struct mvebu_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
|
|
|
|
*groups = pctl->functions[fid].groups;
|
|
*num_groups = pctl->functions[fid].num_groups;
|
|
return 0;
|
|
}
|
|
|
|
static int mvebu_pinmux_set(struct pinctrl_dev *pctldev, unsigned fid,
|
|
unsigned gid)
|
|
{
|
|
struct mvebu_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
|
|
struct mvebu_pinctrl_function *func = &pctl->functions[fid];
|
|
struct mvebu_pinctrl_group *grp = &pctl->groups[gid];
|
|
struct mvebu_mpp_ctrl_setting *setting;
|
|
int ret;
|
|
unsigned long config;
|
|
|
|
setting = mvebu_pinctrl_find_setting_by_name(pctl, grp,
|
|
func->name);
|
|
if (!setting) {
|
|
dev_err(pctl->dev,
|
|
"unable to find setting %s in group %s\n",
|
|
func->name, func->groups[gid]);
|
|
return -EINVAL;
|
|
}
|
|
|
|
config = setting->val;
|
|
ret = mvebu_pinconf_group_set(pctldev, grp->gid, &config, 1);
|
|
if (ret) {
|
|
dev_err(pctl->dev, "cannot set group %s to %s\n",
|
|
func->groups[gid], func->name);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mvebu_pinmux_gpio_request_enable(struct pinctrl_dev *pctldev,
|
|
struct pinctrl_gpio_range *range, unsigned offset)
|
|
{
|
|
struct mvebu_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
|
|
struct mvebu_pinctrl_group *grp;
|
|
struct mvebu_mpp_ctrl_setting *setting;
|
|
unsigned long config;
|
|
|
|
grp = mvebu_pinctrl_find_group_by_pid(pctl, offset);
|
|
if (!grp)
|
|
return -EINVAL;
|
|
|
|
if (grp->ctrl->mpp_gpio_req)
|
|
return grp->ctrl->mpp_gpio_req(grp->data, offset);
|
|
|
|
setting = mvebu_pinctrl_find_gpio_setting(pctl, grp);
|
|
if (!setting)
|
|
return -ENOTSUPP;
|
|
|
|
config = setting->val;
|
|
|
|
return mvebu_pinconf_group_set(pctldev, grp->gid, &config, 1);
|
|
}
|
|
|
|
static int mvebu_pinmux_gpio_set_direction(struct pinctrl_dev *pctldev,
|
|
struct pinctrl_gpio_range *range, unsigned offset, bool input)
|
|
{
|
|
struct mvebu_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
|
|
struct mvebu_pinctrl_group *grp;
|
|
struct mvebu_mpp_ctrl_setting *setting;
|
|
|
|
grp = mvebu_pinctrl_find_group_by_pid(pctl, offset);
|
|
if (!grp)
|
|
return -EINVAL;
|
|
|
|
if (grp->ctrl->mpp_gpio_dir)
|
|
return grp->ctrl->mpp_gpio_dir(grp->data, offset, input);
|
|
|
|
setting = mvebu_pinctrl_find_gpio_setting(pctl, grp);
|
|
if (!setting)
|
|
return -ENOTSUPP;
|
|
|
|
if ((input && (setting->flags & MVEBU_SETTING_GPI)) ||
|
|
(!input && (setting->flags & MVEBU_SETTING_GPO)))
|
|
return 0;
|
|
|
|
return -ENOTSUPP;
|
|
}
|
|
|
|
static const struct pinmux_ops mvebu_pinmux_ops = {
|
|
.get_functions_count = mvebu_pinmux_get_funcs_count,
|
|
.get_function_name = mvebu_pinmux_get_func_name,
|
|
.get_function_groups = mvebu_pinmux_get_groups,
|
|
.gpio_request_enable = mvebu_pinmux_gpio_request_enable,
|
|
.gpio_set_direction = mvebu_pinmux_gpio_set_direction,
|
|
.set_mux = mvebu_pinmux_set,
|
|
};
|
|
|
|
static int mvebu_pinctrl_get_groups_count(struct pinctrl_dev *pctldev)
|
|
{
|
|
struct mvebu_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
|
|
return pctl->num_groups;
|
|
}
|
|
|
|
static const char *mvebu_pinctrl_get_group_name(struct pinctrl_dev *pctldev,
|
|
unsigned gid)
|
|
{
|
|
struct mvebu_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
|
|
return pctl->groups[gid].name;
|
|
}
|
|
|
|
static int mvebu_pinctrl_get_group_pins(struct pinctrl_dev *pctldev,
|
|
unsigned gid, const unsigned **pins,
|
|
unsigned *num_pins)
|
|
{
|
|
struct mvebu_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
|
|
*pins = pctl->groups[gid].pins;
|
|
*num_pins = pctl->groups[gid].npins;
|
|
return 0;
|
|
}
|
|
|
|
static int mvebu_pinctrl_dt_node_to_map(struct pinctrl_dev *pctldev,
|
|
struct device_node *np,
|
|
struct pinctrl_map **map,
|
|
unsigned *num_maps)
|
|
{
|
|
struct mvebu_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
|
|
struct property *prop;
|
|
const char *function;
|
|
const char *group;
|
|
int ret, nmaps, n;
|
|
|
|
*map = NULL;
|
|
*num_maps = 0;
|
|
|
|
ret = of_property_read_string(np, "marvell,function", &function);
|
|
if (ret) {
|
|
dev_err(pctl->dev,
|
|
"missing marvell,function in node %s\n", np->name);
|
|
return 0;
|
|
}
|
|
|
|
nmaps = of_property_count_strings(np, "marvell,pins");
|
|
if (nmaps < 0) {
|
|
dev_err(pctl->dev,
|
|
"missing marvell,pins in node %s\n", np->name);
|
|
return 0;
|
|
}
|
|
|
|
*map = kmalloc_array(nmaps, sizeof(**map), GFP_KERNEL);
|
|
if (!*map)
|
|
return -ENOMEM;
|
|
|
|
n = 0;
|
|
of_property_for_each_string(np, "marvell,pins", prop, group) {
|
|
struct mvebu_pinctrl_group *grp =
|
|
mvebu_pinctrl_find_group_by_name(pctl, group);
|
|
|
|
if (!grp) {
|
|
dev_err(pctl->dev, "unknown pin %s", group);
|
|
continue;
|
|
}
|
|
|
|
if (!mvebu_pinctrl_find_setting_by_name(pctl, grp, function)) {
|
|
dev_err(pctl->dev, "unsupported function %s on pin %s",
|
|
function, group);
|
|
continue;
|
|
}
|
|
|
|
(*map)[n].type = PIN_MAP_TYPE_MUX_GROUP;
|
|
(*map)[n].data.mux.group = group;
|
|
(*map)[n].data.mux.function = function;
|
|
n++;
|
|
}
|
|
|
|
*num_maps = nmaps;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void mvebu_pinctrl_dt_free_map(struct pinctrl_dev *pctldev,
|
|
struct pinctrl_map *map, unsigned num_maps)
|
|
{
|
|
kfree(map);
|
|
}
|
|
|
|
static const struct pinctrl_ops mvebu_pinctrl_ops = {
|
|
.get_groups_count = mvebu_pinctrl_get_groups_count,
|
|
.get_group_name = mvebu_pinctrl_get_group_name,
|
|
.get_group_pins = mvebu_pinctrl_get_group_pins,
|
|
.dt_node_to_map = mvebu_pinctrl_dt_node_to_map,
|
|
.dt_free_map = mvebu_pinctrl_dt_free_map,
|
|
};
|
|
|
|
static int _add_function(struct mvebu_pinctrl_function *funcs, int *funcsize,
|
|
const char *name)
|
|
{
|
|
if (*funcsize <= 0)
|
|
return -EOVERFLOW;
|
|
|
|
while (funcs->num_groups) {
|
|
/* function already there */
|
|
if (strcmp(funcs->name, name) == 0) {
|
|
funcs->num_groups++;
|
|
return -EEXIST;
|
|
}
|
|
funcs++;
|
|
}
|
|
|
|
/* append new unique function */
|
|
funcs->name = name;
|
|
funcs->num_groups = 1;
|
|
(*funcsize)--;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mvebu_pinctrl_build_functions(struct platform_device *pdev,
|
|
struct mvebu_pinctrl *pctl)
|
|
{
|
|
struct mvebu_pinctrl_function *funcs;
|
|
int num = 0, funcsize = pctl->desc.npins;
|
|
int n, s;
|
|
|
|
/* we allocate functions for number of pins and hope
|
|
* there are fewer unique functions than pins available */
|
|
funcs = devm_kzalloc(&pdev->dev, funcsize *
|
|
sizeof(struct mvebu_pinctrl_function), GFP_KERNEL);
|
|
if (!funcs)
|
|
return -ENOMEM;
|
|
|
|
for (n = 0; n < pctl->num_groups; n++) {
|
|
struct mvebu_pinctrl_group *grp = &pctl->groups[n];
|
|
for (s = 0; s < grp->num_settings; s++) {
|
|
int ret;
|
|
|
|
/* skip unsupported settings on this variant */
|
|
if (pctl->variant &&
|
|
!(pctl->variant & grp->settings[s].variant))
|
|
continue;
|
|
|
|
/* check for unique functions and count groups */
|
|
ret = _add_function(funcs, &funcsize,
|
|
grp->settings[s].name);
|
|
if (ret == -EOVERFLOW)
|
|
dev_err(&pdev->dev,
|
|
"More functions than pins(%d)\n",
|
|
pctl->desc.npins);
|
|
if (ret < 0)
|
|
continue;
|
|
|
|
num++;
|
|
}
|
|
}
|
|
|
|
pctl->num_functions = num;
|
|
pctl->functions = funcs;
|
|
|
|
for (n = 0; n < pctl->num_groups; n++) {
|
|
struct mvebu_pinctrl_group *grp = &pctl->groups[n];
|
|
for (s = 0; s < grp->num_settings; s++) {
|
|
struct mvebu_pinctrl_function *f;
|
|
const char **groups;
|
|
|
|
/* skip unsupported settings on this variant */
|
|
if (pctl->variant &&
|
|
!(pctl->variant & grp->settings[s].variant))
|
|
continue;
|
|
|
|
f = mvebu_pinctrl_find_function_by_name(pctl,
|
|
grp->settings[s].name);
|
|
|
|
/* allocate group name array if not done already */
|
|
if (!f->groups) {
|
|
f->groups = devm_kzalloc(&pdev->dev,
|
|
f->num_groups * sizeof(char *),
|
|
GFP_KERNEL);
|
|
if (!f->groups)
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/* find next free group name and assign current name */
|
|
groups = f->groups;
|
|
while (*groups)
|
|
groups++;
|
|
*groups = grp->name;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int mvebu_pinctrl_probe(struct platform_device *pdev)
|
|
{
|
|
struct mvebu_pinctrl_soc_info *soc = dev_get_platdata(&pdev->dev);
|
|
struct mvebu_pinctrl *pctl;
|
|
struct pinctrl_pin_desc *pdesc;
|
|
unsigned gid, n, k;
|
|
unsigned size, noname = 0;
|
|
char *noname_buf;
|
|
void *p;
|
|
int ret;
|
|
|
|
if (!soc || !soc->controls || !soc->modes) {
|
|
dev_err(&pdev->dev, "wrong pinctrl soc info\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
pctl = devm_kzalloc(&pdev->dev, sizeof(struct mvebu_pinctrl),
|
|
GFP_KERNEL);
|
|
if (!pctl)
|
|
return -ENOMEM;
|
|
|
|
pctl->desc.name = dev_name(&pdev->dev);
|
|
pctl->desc.owner = THIS_MODULE;
|
|
pctl->desc.pctlops = &mvebu_pinctrl_ops;
|
|
pctl->desc.pmxops = &mvebu_pinmux_ops;
|
|
pctl->desc.confops = &mvebu_pinconf_ops;
|
|
pctl->variant = soc->variant;
|
|
pctl->dev = &pdev->dev;
|
|
platform_set_drvdata(pdev, pctl);
|
|
|
|
/* count controls and create names for mvebu generic
|
|
register controls; also does sanity checks */
|
|
pctl->num_groups = 0;
|
|
pctl->desc.npins = 0;
|
|
for (n = 0; n < soc->ncontrols; n++) {
|
|
const struct mvebu_mpp_ctrl *ctrl = &soc->controls[n];
|
|
|
|
pctl->desc.npins += ctrl->npins;
|
|
/* initialize control's pins[] array */
|
|
for (k = 0; k < ctrl->npins; k++)
|
|
ctrl->pins[k] = ctrl->pid + k;
|
|
|
|
/*
|
|
* We allow to pass controls with NULL name that we treat
|
|
* as a range of one-pin groups with generic mvebu register
|
|
* controls.
|
|
*/
|
|
if (!ctrl->name) {
|
|
pctl->num_groups += ctrl->npins;
|
|
noname += ctrl->npins;
|
|
} else {
|
|
pctl->num_groups += 1;
|
|
}
|
|
}
|
|
|
|
pdesc = devm_kzalloc(&pdev->dev, pctl->desc.npins *
|
|
sizeof(struct pinctrl_pin_desc), GFP_KERNEL);
|
|
if (!pdesc)
|
|
return -ENOMEM;
|
|
|
|
for (n = 0; n < pctl->desc.npins; n++)
|
|
pdesc[n].number = n;
|
|
pctl->desc.pins = pdesc;
|
|
|
|
/*
|
|
* allocate groups and name buffers for unnamed groups.
|
|
*/
|
|
size = pctl->num_groups * sizeof(*pctl->groups) + noname * 8;
|
|
p = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
|
|
if (!p) {
|
|
dev_err(&pdev->dev, "failed to alloc group data\n");
|
|
return -ENOMEM;
|
|
}
|
|
pctl->groups = p;
|
|
noname_buf = p + pctl->num_groups * sizeof(*pctl->groups);
|
|
|
|
/* assign mpp controls to groups */
|
|
gid = 0;
|
|
for (n = 0; n < soc->ncontrols; n++) {
|
|
const struct mvebu_mpp_ctrl *ctrl = &soc->controls[n];
|
|
struct mvebu_mpp_ctrl_data *data = soc->control_data ?
|
|
&soc->control_data[n] : NULL;
|
|
|
|
pctl->groups[gid].gid = gid;
|
|
pctl->groups[gid].ctrl = ctrl;
|
|
pctl->groups[gid].data = data;
|
|
pctl->groups[gid].name = ctrl->name;
|
|
pctl->groups[gid].pins = ctrl->pins;
|
|
pctl->groups[gid].npins = ctrl->npins;
|
|
|
|
/*
|
|
* We treat unnamed controls as a range of one-pin groups
|
|
* with generic mvebu register controls. Use one group for
|
|
* each in this range and assign a default group name.
|
|
*/
|
|
if (!ctrl->name) {
|
|
pctl->groups[gid].name = noname_buf;
|
|
pctl->groups[gid].npins = 1;
|
|
sprintf(noname_buf, "mpp%d", ctrl->pid+0);
|
|
noname_buf += 8;
|
|
|
|
for (k = 1; k < ctrl->npins; k++) {
|
|
gid++;
|
|
pctl->groups[gid].gid = gid;
|
|
pctl->groups[gid].ctrl = ctrl;
|
|
pctl->groups[gid].data = data;
|
|
pctl->groups[gid].name = noname_buf;
|
|
pctl->groups[gid].pins = &ctrl->pins[k];
|
|
pctl->groups[gid].npins = 1;
|
|
sprintf(noname_buf, "mpp%d", ctrl->pid+k);
|
|
noname_buf += 8;
|
|
}
|
|
}
|
|
gid++;
|
|
}
|
|
|
|
/* assign mpp modes to groups */
|
|
for (n = 0; n < soc->nmodes; n++) {
|
|
struct mvebu_mpp_mode *mode = &soc->modes[n];
|
|
struct mvebu_mpp_ctrl_setting *set = &mode->settings[0];
|
|
struct mvebu_pinctrl_group *grp;
|
|
unsigned num_settings;
|
|
unsigned supp_settings;
|
|
|
|
for (num_settings = 0, supp_settings = 0; ; set++) {
|
|
if (!set->name)
|
|
break;
|
|
|
|
num_settings++;
|
|
|
|
/* skip unsupported settings for this variant */
|
|
if (pctl->variant && !(pctl->variant & set->variant))
|
|
continue;
|
|
|
|
supp_settings++;
|
|
|
|
/* find gpio/gpo/gpi settings */
|
|
if (strcmp(set->name, "gpio") == 0)
|
|
set->flags = MVEBU_SETTING_GPI |
|
|
MVEBU_SETTING_GPO;
|
|
else if (strcmp(set->name, "gpo") == 0)
|
|
set->flags = MVEBU_SETTING_GPO;
|
|
else if (strcmp(set->name, "gpi") == 0)
|
|
set->flags = MVEBU_SETTING_GPI;
|
|
}
|
|
|
|
/* skip modes with no settings for this variant */
|
|
if (!supp_settings)
|
|
continue;
|
|
|
|
grp = mvebu_pinctrl_find_group_by_pid(pctl, mode->pid);
|
|
if (!grp) {
|
|
dev_warn(&pdev->dev, "unknown pinctrl group %d\n",
|
|
mode->pid);
|
|
continue;
|
|
}
|
|
|
|
grp->settings = mode->settings;
|
|
grp->num_settings = num_settings;
|
|
}
|
|
|
|
ret = mvebu_pinctrl_build_functions(pdev, pctl);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "unable to build functions\n");
|
|
return ret;
|
|
}
|
|
|
|
pctl->pctldev = devm_pinctrl_register(&pdev->dev, &pctl->desc, pctl);
|
|
if (IS_ERR(pctl->pctldev)) {
|
|
dev_err(&pdev->dev, "unable to register pinctrl driver\n");
|
|
return PTR_ERR(pctl->pctldev);
|
|
}
|
|
|
|
dev_info(&pdev->dev, "registered pinctrl driver\n");
|
|
|
|
/* register gpio ranges */
|
|
for (n = 0; n < soc->ngpioranges; n++)
|
|
pinctrl_add_gpio_range(pctl->pctldev, &soc->gpioranges[n]);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* mvebu_pinctrl_simple_mmio_probe - probe a simple mmio pinctrl
|
|
* @pdev: platform device (with platform data already attached)
|
|
*
|
|
* Initialise a simple (single base address) mmio pinctrl driver,
|
|
* assigning the MMIO base address to all mvebu mpp ctrl instances.
|
|
*/
|
|
int mvebu_pinctrl_simple_mmio_probe(struct platform_device *pdev)
|
|
{
|
|
struct mvebu_pinctrl_soc_info *soc = dev_get_platdata(&pdev->dev);
|
|
struct mvebu_mpp_ctrl_data *mpp_data;
|
|
struct resource *res;
|
|
void __iomem *base;
|
|
int i;
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
base = devm_ioremap_resource(&pdev->dev, res);
|
|
if (IS_ERR(base))
|
|
return PTR_ERR(base);
|
|
|
|
mpp_data = devm_kcalloc(&pdev->dev, soc->ncontrols, sizeof(*mpp_data),
|
|
GFP_KERNEL);
|
|
if (!mpp_data)
|
|
return -ENOMEM;
|
|
|
|
for (i = 0; i < soc->ncontrols; i++)
|
|
mpp_data[i].base = base;
|
|
|
|
soc->control_data = mpp_data;
|
|
|
|
return mvebu_pinctrl_probe(pdev);
|
|
}
|
|
|
|
int mvebu_regmap_mpp_ctrl_get(struct mvebu_mpp_ctrl_data *data,
|
|
unsigned int pid, unsigned long *config)
|
|
{
|
|
unsigned off = (pid / MVEBU_MPPS_PER_REG) * MVEBU_MPP_BITS;
|
|
unsigned shift = (pid % MVEBU_MPPS_PER_REG) * MVEBU_MPP_BITS;
|
|
unsigned int val;
|
|
int err;
|
|
|
|
err = regmap_read(data->regmap.map, data->regmap.offset + off, &val);
|
|
if (err)
|
|
return err;
|
|
|
|
*config = (val >> shift) & MVEBU_MPP_MASK;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int mvebu_regmap_mpp_ctrl_set(struct mvebu_mpp_ctrl_data *data,
|
|
unsigned int pid, unsigned long config)
|
|
{
|
|
unsigned off = (pid / MVEBU_MPPS_PER_REG) * MVEBU_MPP_BITS;
|
|
unsigned shift = (pid % MVEBU_MPPS_PER_REG) * MVEBU_MPP_BITS;
|
|
|
|
return regmap_update_bits(data->regmap.map, data->regmap.offset + off,
|
|
MVEBU_MPP_MASK << shift, config << shift);
|
|
}
|
|
|
|
int mvebu_pinctrl_simple_regmap_probe(struct platform_device *pdev,
|
|
struct device *syscon_dev, u32 offset)
|
|
{
|
|
struct mvebu_pinctrl_soc_info *soc = dev_get_platdata(&pdev->dev);
|
|
struct mvebu_mpp_ctrl_data *mpp_data;
|
|
struct regmap *regmap;
|
|
int i;
|
|
|
|
regmap = syscon_node_to_regmap(syscon_dev->of_node);
|
|
if (IS_ERR(regmap))
|
|
return PTR_ERR(regmap);
|
|
|
|
mpp_data = devm_kcalloc(&pdev->dev, soc->ncontrols, sizeof(*mpp_data),
|
|
GFP_KERNEL);
|
|
if (!mpp_data)
|
|
return -ENOMEM;
|
|
|
|
for (i = 0; i < soc->ncontrols; i++) {
|
|
mpp_data[i].regmap.map = regmap;
|
|
mpp_data[i].regmap.offset = offset;
|
|
}
|
|
|
|
soc->control_data = mpp_data;
|
|
|
|
return mvebu_pinctrl_probe(pdev);
|
|
}
|