mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
344 lines
8.6 KiB
344 lines
8.6 KiB
// SPDX-License-Identifier: GPL-2.0-only |
|
/* |
|
* linux/drivers/pinctrl/pinctrl-lantiq.c |
|
* based on linux/drivers/pinctrl/pinctrl-pxa3xx.c |
|
* |
|
* Copyright (C) 2012 John Crispin <[email protected]> |
|
*/ |
|
|
|
#include <linux/module.h> |
|
#include <linux/device.h> |
|
#include <linux/io.h> |
|
#include <linux/platform_device.h> |
|
#include <linux/slab.h> |
|
#include <linux/of.h> |
|
|
|
#include "pinctrl-lantiq.h" |
|
|
|
static int ltq_get_group_count(struct pinctrl_dev *pctrldev) |
|
{ |
|
struct ltq_pinmux_info *info = pinctrl_dev_get_drvdata(pctrldev); |
|
return info->num_grps; |
|
} |
|
|
|
static const char *ltq_get_group_name(struct pinctrl_dev *pctrldev, |
|
unsigned selector) |
|
{ |
|
struct ltq_pinmux_info *info = pinctrl_dev_get_drvdata(pctrldev); |
|
if (selector >= info->num_grps) |
|
return NULL; |
|
return info->grps[selector].name; |
|
} |
|
|
|
static int ltq_get_group_pins(struct pinctrl_dev *pctrldev, |
|
unsigned selector, |
|
const unsigned **pins, |
|
unsigned *num_pins) |
|
{ |
|
struct ltq_pinmux_info *info = pinctrl_dev_get_drvdata(pctrldev); |
|
if (selector >= info->num_grps) |
|
return -EINVAL; |
|
*pins = info->grps[selector].pins; |
|
*num_pins = info->grps[selector].npins; |
|
return 0; |
|
} |
|
|
|
static void ltq_pinctrl_dt_free_map(struct pinctrl_dev *pctldev, |
|
struct pinctrl_map *map, unsigned num_maps) |
|
{ |
|
int i; |
|
|
|
for (i = 0; i < num_maps; i++) |
|
if (map[i].type == PIN_MAP_TYPE_CONFIGS_PIN || |
|
map[i].type == PIN_MAP_TYPE_CONFIGS_GROUP) |
|
kfree(map[i].data.configs.configs); |
|
kfree(map); |
|
} |
|
|
|
static void ltq_pinctrl_pin_dbg_show(struct pinctrl_dev *pctldev, |
|
struct seq_file *s, |
|
unsigned offset) |
|
{ |
|
seq_printf(s, " %s", dev_name(pctldev->dev)); |
|
} |
|
|
|
static void ltq_pinctrl_dt_subnode_to_map(struct pinctrl_dev *pctldev, |
|
struct device_node *np, |
|
struct pinctrl_map **map) |
|
{ |
|
struct ltq_pinmux_info *info = pinctrl_dev_get_drvdata(pctldev); |
|
struct property *pins = of_find_property(np, "lantiq,pins", NULL); |
|
struct property *groups = of_find_property(np, "lantiq,groups", NULL); |
|
unsigned long configs[3]; |
|
unsigned num_configs = 0; |
|
struct property *prop; |
|
const char *group, *pin; |
|
const char *function; |
|
int ret, i; |
|
|
|
if (!pins && !groups) { |
|
dev_err(pctldev->dev, "%pOFn defines neither pins nor groups\n", |
|
np); |
|
return; |
|
} |
|
|
|
if (pins && groups) { |
|
dev_err(pctldev->dev, "%pOFn defines both pins and groups\n", |
|
np); |
|
return; |
|
} |
|
|
|
ret = of_property_read_string(np, "lantiq,function", &function); |
|
if (groups && !ret) { |
|
of_property_for_each_string(np, "lantiq,groups", prop, group) { |
|
(*map)->type = PIN_MAP_TYPE_MUX_GROUP; |
|
(*map)->name = function; |
|
(*map)->data.mux.group = group; |
|
(*map)->data.mux.function = function; |
|
(*map)++; |
|
} |
|
} |
|
|
|
for (i = 0; i < info->num_params; i++) { |
|
u32 val; |
|
int ret = of_property_read_u32(np, |
|
info->params[i].property, &val); |
|
if (!ret) |
|
configs[num_configs++] = |
|
LTQ_PINCONF_PACK(info->params[i].param, |
|
val); |
|
} |
|
|
|
if (!num_configs) |
|
return; |
|
|
|
of_property_for_each_string(np, "lantiq,pins", prop, pin) { |
|
(*map)->data.configs.configs = kmemdup(configs, |
|
num_configs * sizeof(unsigned long), |
|
GFP_KERNEL); |
|
(*map)->type = PIN_MAP_TYPE_CONFIGS_PIN; |
|
(*map)->name = pin; |
|
(*map)->data.configs.group_or_pin = pin; |
|
(*map)->data.configs.num_configs = num_configs; |
|
(*map)++; |
|
} |
|
of_property_for_each_string(np, "lantiq,groups", prop, group) { |
|
(*map)->data.configs.configs = kmemdup(configs, |
|
num_configs * sizeof(unsigned long), |
|
GFP_KERNEL); |
|
(*map)->type = PIN_MAP_TYPE_CONFIGS_GROUP; |
|
(*map)->name = group; |
|
(*map)->data.configs.group_or_pin = group; |
|
(*map)->data.configs.num_configs = num_configs; |
|
(*map)++; |
|
} |
|
} |
|
|
|
static int ltq_pinctrl_dt_subnode_size(struct device_node *np) |
|
{ |
|
int ret; |
|
|
|
ret = of_property_count_strings(np, "lantiq,groups"); |
|
if (ret < 0) |
|
ret = of_property_count_strings(np, "lantiq,pins"); |
|
return ret; |
|
} |
|
|
|
static int ltq_pinctrl_dt_node_to_map(struct pinctrl_dev *pctldev, |
|
struct device_node *np_config, |
|
struct pinctrl_map **map, |
|
unsigned *num_maps) |
|
{ |
|
struct pinctrl_map *tmp; |
|
struct device_node *np; |
|
int max_maps = 0; |
|
|
|
for_each_child_of_node(np_config, np) |
|
max_maps += ltq_pinctrl_dt_subnode_size(np); |
|
*map = kzalloc(array3_size(max_maps, sizeof(struct pinctrl_map), 2), |
|
GFP_KERNEL); |
|
if (!*map) |
|
return -ENOMEM; |
|
tmp = *map; |
|
|
|
for_each_child_of_node(np_config, np) |
|
ltq_pinctrl_dt_subnode_to_map(pctldev, np, &tmp); |
|
*num_maps = ((int)(tmp - *map)); |
|
|
|
return 0; |
|
} |
|
|
|
static const struct pinctrl_ops ltq_pctrl_ops = { |
|
.get_groups_count = ltq_get_group_count, |
|
.get_group_name = ltq_get_group_name, |
|
.get_group_pins = ltq_get_group_pins, |
|
.pin_dbg_show = ltq_pinctrl_pin_dbg_show, |
|
.dt_node_to_map = ltq_pinctrl_dt_node_to_map, |
|
.dt_free_map = ltq_pinctrl_dt_free_map, |
|
}; |
|
|
|
static int ltq_pmx_func_count(struct pinctrl_dev *pctrldev) |
|
{ |
|
struct ltq_pinmux_info *info = pinctrl_dev_get_drvdata(pctrldev); |
|
|
|
return info->num_funcs; |
|
} |
|
|
|
static const char *ltq_pmx_func_name(struct pinctrl_dev *pctrldev, |
|
unsigned selector) |
|
{ |
|
struct ltq_pinmux_info *info = pinctrl_dev_get_drvdata(pctrldev); |
|
|
|
if (selector >= info->num_funcs) |
|
return NULL; |
|
|
|
return info->funcs[selector].name; |
|
} |
|
|
|
static int ltq_pmx_get_groups(struct pinctrl_dev *pctrldev, |
|
unsigned func, |
|
const char * const **groups, |
|
unsigned * const num_groups) |
|
{ |
|
struct ltq_pinmux_info *info = pinctrl_dev_get_drvdata(pctrldev); |
|
|
|
*groups = info->funcs[func].groups; |
|
*num_groups = info->funcs[func].num_groups; |
|
|
|
return 0; |
|
} |
|
|
|
/* Return function number. If failure, return negative value. */ |
|
static int match_mux(const struct ltq_mfp_pin *mfp, unsigned mux) |
|
{ |
|
int i; |
|
for (i = 0; i < LTQ_MAX_MUX; i++) { |
|
if (mfp->func[i] == mux) |
|
break; |
|
} |
|
if (i >= LTQ_MAX_MUX) |
|
return -EINVAL; |
|
return i; |
|
} |
|
|
|
/* don't assume .mfp is linearly mapped. find the mfp with the correct .pin */ |
|
static int match_mfp(const struct ltq_pinmux_info *info, int pin) |
|
{ |
|
int i; |
|
for (i = 0; i < info->num_mfp; i++) { |
|
if (info->mfp[i].pin == pin) |
|
return i; |
|
} |
|
return -1; |
|
} |
|
|
|
/* check whether current pin configuration is valid. Negative for failure */ |
|
static int match_group_mux(const struct ltq_pin_group *grp, |
|
const struct ltq_pinmux_info *info, |
|
unsigned mux) |
|
{ |
|
int i, pin, ret = 0; |
|
for (i = 0; i < grp->npins; i++) { |
|
pin = match_mfp(info, grp->pins[i]); |
|
if (pin < 0) { |
|
dev_err(info->dev, "could not find mfp for pin %d\n", |
|
grp->pins[i]); |
|
return -EINVAL; |
|
} |
|
ret = match_mux(&info->mfp[pin], mux); |
|
if (ret < 0) { |
|
dev_err(info->dev, "Can't find mux %d on pin%d\n", |
|
mux, pin); |
|
break; |
|
} |
|
} |
|
return ret; |
|
} |
|
|
|
static int ltq_pmx_set(struct pinctrl_dev *pctrldev, |
|
unsigned func, |
|
unsigned group) |
|
{ |
|
struct ltq_pinmux_info *info = pinctrl_dev_get_drvdata(pctrldev); |
|
const struct ltq_pin_group *pin_grp = &info->grps[group]; |
|
int i, pin, pin_func, ret; |
|
|
|
if (!pin_grp->npins || |
|
(match_group_mux(pin_grp, info, pin_grp->mux) < 0)) { |
|
dev_err(info->dev, "Failed to set the pin group: %s\n", |
|
info->grps[group].name); |
|
return -EINVAL; |
|
} |
|
for (i = 0; i < pin_grp->npins; i++) { |
|
pin = match_mfp(info, pin_grp->pins[i]); |
|
if (pin < 0) { |
|
dev_err(info->dev, "could not find mfp for pin %d\n", |
|
pin_grp->pins[i]); |
|
return -EINVAL; |
|
} |
|
pin_func = match_mux(&info->mfp[pin], pin_grp->mux); |
|
ret = info->apply_mux(pctrldev, pin, pin_func); |
|
if (ret) { |
|
dev_err(info->dev, |
|
"failed to apply mux %d for pin %d\n", |
|
pin_func, pin); |
|
return ret; |
|
} |
|
} |
|
return 0; |
|
} |
|
|
|
static int ltq_pmx_gpio_request_enable(struct pinctrl_dev *pctrldev, |
|
struct pinctrl_gpio_range *range, |
|
unsigned pin) |
|
{ |
|
struct ltq_pinmux_info *info = pinctrl_dev_get_drvdata(pctrldev); |
|
int mfp = match_mfp(info, pin); |
|
int pin_func; |
|
|
|
if (mfp < 0) { |
|
dev_err(info->dev, "could not find mfp for pin %d\n", pin); |
|
return -EINVAL; |
|
} |
|
|
|
pin_func = match_mux(&info->mfp[mfp], 0); |
|
if (pin_func < 0) { |
|
dev_err(info->dev, "No GPIO function on pin%d\n", mfp); |
|
return -EINVAL; |
|
} |
|
|
|
return info->apply_mux(pctrldev, mfp, pin_func); |
|
} |
|
|
|
static const struct pinmux_ops ltq_pmx_ops = { |
|
.get_functions_count = ltq_pmx_func_count, |
|
.get_function_name = ltq_pmx_func_name, |
|
.get_function_groups = ltq_pmx_get_groups, |
|
.set_mux = ltq_pmx_set, |
|
.gpio_request_enable = ltq_pmx_gpio_request_enable, |
|
}; |
|
|
|
/* |
|
* allow different socs to register with the generic part of the lanti |
|
* pinctrl code |
|
*/ |
|
int ltq_pinctrl_register(struct platform_device *pdev, |
|
struct ltq_pinmux_info *info) |
|
{ |
|
struct pinctrl_desc *desc; |
|
|
|
if (!info) |
|
return -EINVAL; |
|
desc = info->desc; |
|
desc->pctlops = <q_pctrl_ops; |
|
desc->pmxops = <q_pmx_ops; |
|
info->dev = &pdev->dev; |
|
|
|
info->pctrl = devm_pinctrl_register(&pdev->dev, desc, info); |
|
if (IS_ERR(info->pctrl)) { |
|
dev_err(&pdev->dev, "failed to register LTQ pinmux driver\n"); |
|
return PTR_ERR(info->pctrl); |
|
} |
|
platform_set_drvdata(pdev, info); |
|
return 0; |
|
}
|
|
|