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android / kernel / common / 0ed2dd03b94b7b7f66e23f25073b5385d0416589 / . / drivers / pinctrl / uniphier / pinctrl-uniphier-core.c
blob: add8e870667b3d2c862c55a78b468366c07c25bc [file] [log] [blame]
/*
* Copyright (C) 2015-2017 Socionext Inc.
* Author: Masahiro Yamada <[email protected]>
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/list.h>
#include <linux/mfd/syscon.h>
#include <linux/of.h>
#include <linux/pinctrl/pinconf.h>
#include <linux/pinctrl/pinconf-generic.h>
#include <linux/pinctrl/pinctrl.h>
#include <linux/pinctrl/pinmux.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include "../core.h"
#include "../pinctrl-utils.h"
#include "pinctrl-uniphier.h"
#define UNIPHIER_PINCTRL_PINMUX_BASE 0x1000
#define UNIPHIER_PINCTRL_LOAD_PINMUX 0x1700
#define UNIPHIER_PINCTRL_DRVCTRL_BASE 0x1800
#define UNIPHIER_PINCTRL_DRV2CTRL_BASE 0x1900
#define UNIPHIER_PINCTRL_DRV3CTRL_BASE 0x1980
#define UNIPHIER_PINCTRL_PUPDCTRL_BASE 0x1a00
#define UNIPHIER_PINCTRL_IECTRL_BASE 0x1d00
struct uniphier_pinctrl_reg_region {
struct list_head node;
unsigned int base;
unsigned int nregs;
u32 vals[0];
};
struct uniphier_pinctrl_priv {
struct pinctrl_desc pctldesc;
struct pinctrl_dev *pctldev;
struct regmap *regmap;
struct uniphier_pinctrl_socdata *socdata;
struct list_head reg_regions;
};
static int uniphier_pctl_get_groups_count(struct pinctrl_dev *pctldev)
{
struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev);
return priv->socdata->groups_count;
}
static const char *uniphier_pctl_get_group_name(struct pinctrl_dev *pctldev,
unsigned selector)
{
struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev);
return priv->socdata->groups[selector].name;
}
static int uniphier_pctl_get_group_pins(struct pinctrl_dev *pctldev,
unsigned selector,
const unsigned **pins,
unsigned *num_pins)
{
struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev);
*pins = priv->socdata->groups[selector].pins;
*num_pins = priv->socdata->groups[selector].num_pins;
return 0;
}
#ifdef CONFIG_DEBUG_FS
static void uniphier_pctl_pin_dbg_show(struct pinctrl_dev *pctldev,
struct seq_file *s, unsigned offset)
{
const struct pin_desc *desc = pin_desc_get(pctldev, offset);
const char *pull_dir, *drv_type;
switch (uniphier_pin_get_pull_dir(desc->drv_data)) {
case UNIPHIER_PIN_PULL_UP:
pull_dir = "UP";
break;
case UNIPHIER_PIN_PULL_DOWN:
pull_dir = "DOWN";
break;
case UNIPHIER_PIN_PULL_UP_FIXED:
pull_dir = "UP(FIXED)";
break;
case UNIPHIER_PIN_PULL_DOWN_FIXED:
pull_dir = "DOWN(FIXED)";
break;
case UNIPHIER_PIN_PULL_NONE:
pull_dir = "NONE";
break;
default:
BUG();
}
switch (uniphier_pin_get_drv_type(desc->drv_data)) {
case UNIPHIER_PIN_DRV_1BIT:
drv_type = "4/8(mA)";
break;
case UNIPHIER_PIN_DRV_2BIT:
drv_type = "8/12/16/20(mA)";
break;
case UNIPHIER_PIN_DRV_3BIT:
drv_type = "4/5/7/9/11/12/14/16(mA)";
break;
case UNIPHIER_PIN_DRV_FIXED4:
drv_type = "4(mA)";
break;
case UNIPHIER_PIN_DRV_FIXED5:
drv_type = "5(mA)";
break;
case UNIPHIER_PIN_DRV_FIXED8:
drv_type = "8(mA)";
break;
case UNIPHIER_PIN_DRV_NONE:
drv_type = "NONE";
break;
default:
BUG();
}
seq_printf(s, " PULL_DIR=%s DRV_TYPE=%s", pull_dir, drv_type);
}
#endif
static const struct pinctrl_ops uniphier_pctlops = {
.get_groups_count = uniphier_pctl_get_groups_count,
.get_group_name = uniphier_pctl_get_group_name,
.get_group_pins = uniphier_pctl_get_group_pins,
#ifdef CONFIG_DEBUG_FS
.pin_dbg_show = uniphier_pctl_pin_dbg_show,
#endif
.dt_node_to_map = pinconf_generic_dt_node_to_map_all,
.dt_free_map = pinctrl_utils_free_map,
};
static const unsigned int uniphier_conf_drv_strengths_1bit[] = {4, 8};
static const unsigned int uniphier_conf_drv_strengths_2bit[] = {8, 12, 16, 20};
static const unsigned int uniphier_conf_drv_strengths_3bit[] = {4, 5, 7, 9, 11,
12, 14, 16};
static const unsigned int uniphier_conf_drv_strengths_fixed4[] = {4};
static const unsigned int uniphier_conf_drv_strengths_fixed5[] = {5};
static const unsigned int uniphier_conf_drv_strengths_fixed8[] = {8};
static int uniphier_conf_get_drvctrl_data(struct pinctrl_dev *pctldev,
unsigned int pin, unsigned int *reg,
unsigned int *shift,
unsigned int *mask,
const unsigned int **strengths)
{
const struct pin_desc *desc = pin_desc_get(pctldev, pin);
enum uniphier_pin_drv_type type =
uniphier_pin_get_drv_type(desc->drv_data);
unsigned int base = 0;
unsigned int stride = 0;
unsigned int width = 0;
unsigned int drvctrl;
switch (type) {
case UNIPHIER_PIN_DRV_1BIT:
*strengths = uniphier_conf_drv_strengths_1bit;
base = UNIPHIER_PINCTRL_DRVCTRL_BASE;
stride = 1;
width = 1;
break;
case UNIPHIER_PIN_DRV_2BIT:
*strengths = uniphier_conf_drv_strengths_2bit;
base = UNIPHIER_PINCTRL_DRV2CTRL_BASE;
stride = 2;
width = 2;
break;
case UNIPHIER_PIN_DRV_3BIT:
*strengths = uniphier_conf_drv_strengths_3bit;
base = UNIPHIER_PINCTRL_DRV3CTRL_BASE;
stride = 4;
width = 3;
break;
case UNIPHIER_PIN_DRV_FIXED4:
*strengths = uniphier_conf_drv_strengths_fixed4;
break;
case UNIPHIER_PIN_DRV_FIXED5:
*strengths = uniphier_conf_drv_strengths_fixed5;
break;
case UNIPHIER_PIN_DRV_FIXED8:
*strengths = uniphier_conf_drv_strengths_fixed8;
break;
default:
/* drive strength control is not supported for this pin */
return -EINVAL;
}
drvctrl = uniphier_pin_get_drvctrl(desc->drv_data);
drvctrl *= stride;
*reg = base + drvctrl / 32 * 4;
*shift = drvctrl % 32;
*mask = (1U << width) - 1;
return 0;
}
static int uniphier_conf_pin_bias_get(struct pinctrl_dev *pctldev,
unsigned int pin,
enum pin_config_param param)
{
struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev);
const struct pin_desc *desc = pin_desc_get(pctldev, pin);
enum uniphier_pin_pull_dir pull_dir =
uniphier_pin_get_pull_dir(desc->drv_data);
unsigned int pupdctrl, reg, shift, val;
unsigned int expected = 1;
int ret;
switch (param) {
case PIN_CONFIG_BIAS_DISABLE:
if (pull_dir == UNIPHIER_PIN_PULL_NONE)
return 0;
if (pull_dir == UNIPHIER_PIN_PULL_UP_FIXED ||
pull_dir == UNIPHIER_PIN_PULL_DOWN_FIXED)
return -EINVAL;
expected = 0;
break;
case PIN_CONFIG_BIAS_PULL_UP:
if (pull_dir == UNIPHIER_PIN_PULL_UP_FIXED)
return 0;
if (pull_dir != UNIPHIER_PIN_PULL_UP)
return -EINVAL;
break;
case PIN_CONFIG_BIAS_PULL_DOWN:
if (pull_dir == UNIPHIER_PIN_PULL_DOWN_FIXED)
return 0;
if (pull_dir != UNIPHIER_PIN_PULL_DOWN)
return -EINVAL;
break;
default:
BUG();
}
pupdctrl = uniphier_pin_get_pupdctrl(desc->drv_data);
reg = UNIPHIER_PINCTRL_PUPDCTRL_BASE + pupdctrl / 32 * 4;
shift = pupdctrl % 32;
ret = regmap_read(priv->regmap, reg, &val);
if (ret)
return ret;
val = (val >> shift) & 1;
return (val == expected) ? 0 : -EINVAL;
}
static int uniphier_conf_pin_drive_get(struct pinctrl_dev *pctldev,
unsigned int pin, u32 *strength)
{
struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev);
unsigned int reg, shift, mask, val;
const unsigned int *strengths;
int ret;
ret = uniphier_conf_get_drvctrl_data(pctldev, pin, &reg, &shift,
&mask, &strengths);
if (ret)
return ret;
if (mask) {
ret = regmap_read(priv->regmap, reg, &val);
if (ret)
return ret;
} else {
val = 0;
}
*strength = strengths[(val >> shift) & mask];
return 0;
}
static int uniphier_conf_pin_input_enable_get(struct pinctrl_dev *pctldev,
unsigned int pin)
{
struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev);
const struct pin_desc *desc = pin_desc_get(pctldev, pin);
unsigned int iectrl = uniphier_pin_get_iectrl(desc->drv_data);
unsigned int reg, mask, val;
int ret;
if (iectrl == UNIPHIER_PIN_IECTRL_NONE)
/* This pin is always input-enabled. */
return 0;
if (priv->socdata->caps & UNIPHIER_PINCTRL_CAPS_PERPIN_IECTRL)
iectrl = pin;
reg = UNIPHIER_PINCTRL_IECTRL_BASE + iectrl / 32 * 4;
mask = BIT(iectrl % 32);
ret = regmap_read(priv->regmap, reg, &val);
if (ret)
return ret;
return val & mask ? 0 : -EINVAL;
}
static int uniphier_conf_pin_config_get(struct pinctrl_dev *pctldev,
unsigned pin,
unsigned long *configs)
{
enum pin_config_param param = pinconf_to_config_param(*configs);
bool has_arg = false;
u32 arg;
int ret;
switch (param) {
case PIN_CONFIG_BIAS_DISABLE:
case PIN_CONFIG_BIAS_PULL_UP:
case PIN_CONFIG_BIAS_PULL_DOWN:
ret = uniphier_conf_pin_bias_get(pctldev, pin, param);
break;
case PIN_CONFIG_DRIVE_STRENGTH:
ret = uniphier_conf_pin_drive_get(pctldev, pin, &arg);
has_arg = true;
break;
case PIN_CONFIG_INPUT_ENABLE:
ret = uniphier_conf_pin_input_enable_get(pctldev, pin);
break;
default:
/* unsupported parameter */
ret = -EINVAL;
break;
}
if (ret == 0 && has_arg)
*configs = pinconf_to_config_packed(param, arg);
return ret;
}
static int uniphier_conf_pin_bias_set(struct pinctrl_dev *pctldev,
unsigned int pin,
enum pin_config_param param, u32 arg)
{
struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev);
const struct pin_desc *desc = pin_desc_get(pctldev, pin);
enum uniphier_pin_pull_dir pull_dir =
uniphier_pin_get_pull_dir(desc->drv_data);
unsigned int pupdctrl, reg, shift;
unsigned int val = 1;
switch (param) {
case PIN_CONFIG_BIAS_DISABLE:
if (pull_dir == UNIPHIER_PIN_PULL_NONE)
return 0;
if (pull_dir == UNIPHIER_PIN_PULL_UP_FIXED ||
pull_dir == UNIPHIER_PIN_PULL_DOWN_FIXED) {
dev_err(pctldev->dev,
"can not disable pull register for pin %s\n",
desc->name);
return -EINVAL;
}
val = 0;
break;
case PIN_CONFIG_BIAS_PULL_UP:
if (pull_dir == UNIPHIER_PIN_PULL_UP_FIXED && arg != 0)
return 0;
if (pull_dir != UNIPHIER_PIN_PULL_UP) {
dev_err(pctldev->dev,
"pull-up is unsupported for pin %s\n",
desc->name);
return -EINVAL;
}
if (arg == 0) {
dev_err(pctldev->dev, "pull-up can not be total\n");
return -EINVAL;
}
break;
case PIN_CONFIG_BIAS_PULL_DOWN:
if (pull_dir == UNIPHIER_PIN_PULL_DOWN_FIXED && arg != 0)
return 0;
if (pull_dir != UNIPHIER_PIN_PULL_DOWN) {
dev_err(pctldev->dev,
"pull-down is unsupported for pin %s\n",
desc->name);
return -EINVAL;
}
if (arg == 0) {
dev_err(pctldev->dev, "pull-down can not be total\n");
return -EINVAL;
}
break;
case PIN_CONFIG_BIAS_PULL_PIN_DEFAULT:
if (pull_dir == UNIPHIER_PIN_PULL_NONE) {
dev_err(pctldev->dev,
"pull-up/down is unsupported for pin %s\n",
desc->name);
return -EINVAL;
}
if (arg == 0)
return 0; /* configuration ingored */
break;
default:
BUG();
}
pupdctrl = uniphier_pin_get_pupdctrl(desc->drv_data);
reg = UNIPHIER_PINCTRL_PUPDCTRL_BASE + pupdctrl / 32 * 4;
shift = pupdctrl % 32;
return regmap_update_bits(priv->regmap, reg, 1 << shift, val << shift);
}
static int uniphier_conf_pin_drive_set(struct pinctrl_dev *pctldev,
unsigned int pin, u32 strength)
{
struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev);
const struct pin_desc *desc = pin_desc_get(pctldev, pin);
unsigned int reg, shift, mask, val;
const unsigned int *strengths;
int ret;
ret = uniphier_conf_get_drvctrl_data(pctldev, pin, &reg, &shift,
&mask, &strengths);
if (ret) {
dev_err(pctldev->dev, "cannot set drive strength for pin %s\n",
desc->name);
return ret;
}
for (val = 0; val <= mask; val++) {
if (strengths[val] > strength)
break;
}
if (val == 0) {
dev_err(pctldev->dev,
"unsupported drive strength %u mA for pin %s\n",
strength, desc->name);
return -EINVAL;
}
if (!mask)
return 0;
val--;
return regmap_update_bits(priv->regmap, reg,
mask << shift, val << shift);
}
static int uniphier_conf_pin_input_enable(struct pinctrl_dev *pctldev,
unsigned int pin, u32 enable)
{
struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev);
const struct pin_desc *desc = pin_desc_get(pctldev, pin);
unsigned int iectrl = uniphier_pin_get_iectrl(desc->drv_data);
unsigned int reg, mask;
/*
* Multiple pins share one input enable, per-pin disabling is
* impossible.
*/
if (!(priv->socdata->caps & UNIPHIER_PINCTRL_CAPS_PERPIN_IECTRL) &&
!enable)
return -EINVAL;
/* UNIPHIER_PIN_IECTRL_NONE means the pin is always input-enabled */
if (iectrl == UNIPHIER_PIN_IECTRL_NONE)
return enable ? 0 : -EINVAL;
if (priv->socdata->caps & UNIPHIER_PINCTRL_CAPS_PERPIN_IECTRL)
iectrl = pin;
reg = UNIPHIER_PINCTRL_IECTRL_BASE + iectrl / 32 * 4;
mask = BIT(iectrl % 32);
return regmap_update_bits(priv->regmap, reg, mask, enable ? mask : 0);
}
static int uniphier_conf_pin_config_set(struct pinctrl_dev *pctldev,
unsigned pin,
unsigned long *configs,
unsigned num_configs)
{
int i, ret;
for (i = 0; i < num_configs; i++) {
enum pin_config_param param =
pinconf_to_config_param(configs[i]);
u32 arg = pinconf_to_config_argument(configs[i]);
switch (param) {
case PIN_CONFIG_BIAS_DISABLE:
case PIN_CONFIG_BIAS_PULL_UP:
case PIN_CONFIG_BIAS_PULL_DOWN:
case PIN_CONFIG_BIAS_PULL_PIN_DEFAULT:
ret = uniphier_conf_pin_bias_set(pctldev, pin,
param, arg);
break;
case PIN_CONFIG_DRIVE_STRENGTH:
ret = uniphier_conf_pin_drive_set(pctldev, pin, arg);
break;
case PIN_CONFIG_INPUT_ENABLE:
ret = uniphier_conf_pin_input_enable(pctldev, pin, arg);
break;
default:
dev_err(pctldev->dev,
"unsupported configuration parameter %u\n",
param);
return -EINVAL;
}
if (ret)
return ret;
}
return 0;
}
static int uniphier_conf_pin_config_group_set(struct pinctrl_dev *pctldev,
unsigned selector,
unsigned long *configs,
unsigned num_configs)
{
struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev);
const unsigned *pins = priv->socdata->groups[selector].pins;
unsigned num_pins = priv->socdata->groups[selector].num_pins;
int i, ret;
for (i = 0; i < num_pins; i++) {
ret = uniphier_conf_pin_config_set(pctldev, pins[i],
configs, num_configs);
if (ret)
return ret;
}
return 0;
}
static const struct pinconf_ops uniphier_confops = {
.is_generic = true,
.pin_config_get = uniphier_conf_pin_config_get,
.pin_config_set = uniphier_conf_pin_config_set,
.pin_config_group_set = uniphier_conf_pin_config_group_set,
};
static int uniphier_pmx_get_functions_count(struct pinctrl_dev *pctldev)
{
struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev);
return priv->socdata->functions_count;
}
static const char *uniphier_pmx_get_function_name(struct pinctrl_dev *pctldev,
unsigned selector)
{
struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev);
return priv->socdata->functions[selector].name;
}
static int uniphier_pmx_get_function_groups(struct pinctrl_dev *pctldev,
unsigned selector,
const char * const **groups,
unsigned *num_groups)
{
struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev);
*groups = priv->socdata->functions[selector].groups;
*num_groups = priv->socdata->functions[selector].num_groups;
return 0;
}
static int uniphier_pmx_set_one_mux(struct pinctrl_dev *pctldev, unsigned pin,
int muxval)
{
struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev);
unsigned int mux_bits, reg_stride, reg, reg_end, shift, mask;
bool load_pinctrl;
int ret;
/* some pins need input-enabling */
ret = uniphier_conf_pin_input_enable(pctldev, pin, 1);
if (ret)
return ret;
if (muxval < 0)
return 0; /* dedicated pin; nothing to do for pin-mux */
if (priv->socdata->caps & UNIPHIER_PINCTRL_CAPS_DBGMUX_SEPARATE) {
/*
* Mode reg_offset bit_position
* Normal 4 * n shift+3:shift
* Debug 4 * n shift+7:shift+4
*/
mux_bits = 4;
reg_stride = 8;
load_pinctrl = true;
} else {
/*
* Mode reg_offset bit_position
* Normal 8 * n shift+3:shift
* Debug 8 * n + 4 shift+3:shift
*/
mux_bits = 8;
reg_stride = 4;
load_pinctrl = false;
}
reg = UNIPHIER_PINCTRL_PINMUX_BASE + pin * mux_bits / 32 * reg_stride;
reg_end = reg + reg_stride;
shift = pin * mux_bits % 32;
mask = (1U << mux_bits) - 1;
/*
* If reg_stride is greater than 4, the MSB of each pinsel shall be
* stored in the offset+4.
*/
for (; reg < reg_end; reg += 4) {
ret = regmap_update_bits(priv->regmap, reg,
mask << shift, muxval << shift);
if (ret)
return ret;
muxval >>= mux_bits;
}
if (load_pinctrl) {
ret = regmap_write(priv->regmap,
UNIPHIER_PINCTRL_LOAD_PINMUX, 1);
if (ret)
return ret;
}
return 0;
}
static int uniphier_pmx_set_mux(struct pinctrl_dev *pctldev,
unsigned func_selector,
unsigned group_selector)
{
struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev);
const struct uniphier_pinctrl_group *grp =
&priv->socdata->groups[group_selector];
int i;
int ret;
for (i = 0; i < grp->num_pins; i++) {
ret = uniphier_pmx_set_one_mux(pctldev, grp->pins[i],
grp->muxvals[i]);
if (ret)
return ret;
}
return 0;
}
static int uniphier_pmx_gpio_request_enable(struct pinctrl_dev *pctldev,
struct pinctrl_gpio_range *range,
unsigned offset)
{
struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev);
unsigned int gpio_offset;
int muxval, i;
if (range->pins) {
for (i = 0; i < range->npins; i++)
if (range->pins[i] == offset)
break;
if (WARN_ON(i == range->npins))
return -EINVAL;
gpio_offset = i;
} else {
gpio_offset = offset - range->pin_base;
}
gpio_offset += range->id;
muxval = priv->socdata->get_gpio_muxval(offset, gpio_offset);
return uniphier_pmx_set_one_mux(pctldev, offset, muxval);
}
static const struct pinmux_ops uniphier_pmxops = {
.get_functions_count = uniphier_pmx_get_functions_count,
.get_function_name = uniphier_pmx_get_function_name,
.get_function_groups = uniphier_pmx_get_function_groups,
.set_mux = uniphier_pmx_set_mux,
.gpio_request_enable = uniphier_pmx_gpio_request_enable,
.strict = true,
};
#ifdef CONFIG_PM_SLEEP
static int uniphier_pinctrl_suspend(struct device *dev)
{
struct uniphier_pinctrl_priv *priv = dev_get_drvdata(dev);
struct uniphier_pinctrl_reg_region *r;
int ret;
list_for_each_entry(r, &priv->reg_regions, node) {
ret = regmap_bulk_read(priv->regmap, r->base, r->vals,
r->nregs);
if (ret)
return ret;
}
return 0;
}
static int uniphier_pinctrl_resume(struct device *dev)
{
struct uniphier_pinctrl_priv *priv = dev_get_drvdata(dev);
struct uniphier_pinctrl_reg_region *r;
int ret;
list_for_each_entry(r, &priv->reg_regions, node) {
ret = regmap_bulk_write(priv->regmap, r->base, r->vals,
r->nregs);
if (ret)
return ret;
}
if (priv->socdata->caps & UNIPHIER_PINCTRL_CAPS_DBGMUX_SEPARATE) {
ret = regmap_write(priv->regmap,
UNIPHIER_PINCTRL_LOAD_PINMUX, 1);
if (ret)
return ret;
}
return 0;
}
static int uniphier_pinctrl_add_reg_region(struct device *dev,
struct uniphier_pinctrl_priv *priv,
unsigned int base,
unsigned int count,
unsigned int width)
{
struct uniphier_pinctrl_reg_region *region;
unsigned int nregs;
if (!count)
return 0;
nregs = DIV_ROUND_UP(count * width, 32);
region = devm_kzalloc(dev, struct_size(region, vals, nregs),
GFP_KERNEL);
if (!region)
return -ENOMEM;
region->base = base;
region->nregs = nregs;
list_add_tail(&region->node, &priv->reg_regions);
return 0;
}
#endif
static int uniphier_pinctrl_pm_init(struct device *dev,
struct uniphier_pinctrl_priv *priv)
{
#ifdef CONFIG_PM_SLEEP
const struct uniphier_pinctrl_socdata *socdata = priv->socdata;
unsigned int num_drvctrl = 0;
unsigned int num_drv2ctrl = 0;
unsigned int num_drv3ctrl = 0;
unsigned int num_pupdctrl = 0;
unsigned int num_iectrl = 0;
unsigned int iectrl, drvctrl, pupdctrl;
enum uniphier_pin_drv_type drv_type;
enum uniphier_pin_pull_dir pull_dir;
int i, ret;
for (i = 0; i < socdata->npins; i++) {
void *drv_data = socdata->pins[i].drv_data;
drvctrl = uniphier_pin_get_drvctrl(drv_data);
drv_type = uniphier_pin_get_drv_type(drv_data);
pupdctrl = uniphier_pin_get_pupdctrl(drv_data);
pull_dir = uniphier_pin_get_pull_dir(drv_data);
iectrl = uniphier_pin_get_iectrl(drv_data);
switch (drv_type) {
case UNIPHIER_PIN_DRV_1BIT:
num_drvctrl = max(num_drvctrl, drvctrl + 1);
break;
case UNIPHIER_PIN_DRV_2BIT:
num_drv2ctrl = max(num_drv2ctrl, drvctrl + 1);
break;
case UNIPHIER_PIN_DRV_3BIT:
num_drv3ctrl = max(num_drv3ctrl, drvctrl + 1);
break;
default:
break;
}
if (pull_dir == UNIPHIER_PIN_PULL_UP ||
pull_dir == UNIPHIER_PIN_PULL_DOWN)
num_pupdctrl = max(num_pupdctrl, pupdctrl + 1);
if (iectrl != UNIPHIER_PIN_IECTRL_NONE) {
if (socdata->caps & UNIPHIER_PINCTRL_CAPS_PERPIN_IECTRL)
iectrl = i;
num_iectrl = max(num_iectrl, iectrl + 1);
}
}
INIT_LIST_HEAD(&priv->reg_regions);
ret = uniphier_pinctrl_add_reg_region(dev, priv,
UNIPHIER_PINCTRL_PINMUX_BASE,
socdata->npins, 8);
if (ret)
return ret;
ret = uniphier_pinctrl_add_reg_region(dev, priv,
UNIPHIER_PINCTRL_DRVCTRL_BASE,
num_drvctrl, 1);
if (ret)
return ret;
ret = uniphier_pinctrl_add_reg_region(dev, priv,
UNIPHIER_PINCTRL_DRV2CTRL_BASE,
num_drv2ctrl, 2);
if (ret)
return ret;
ret = uniphier_pinctrl_add_reg_region(dev, priv,
UNIPHIER_PINCTRL_DRV3CTRL_BASE,
num_drv3ctrl, 3);
if (ret)
return ret;
ret = uniphier_pinctrl_add_reg_region(dev, priv,
UNIPHIER_PINCTRL_PUPDCTRL_BASE,
num_pupdctrl, 1);
if (ret)
return ret;
ret = uniphier_pinctrl_add_reg_region(dev, priv,
UNIPHIER_PINCTRL_IECTRL_BASE,
num_iectrl, 1);
if (ret)
return ret;
#endif
return 0;
}
const struct dev_pm_ops uniphier_pinctrl_pm_ops = {
SET_LATE_SYSTEM_SLEEP_PM_OPS(uniphier_pinctrl_suspend,
uniphier_pinctrl_resume)
};
int uniphier_pinctrl_probe(struct platform_device *pdev,
struct uniphier_pinctrl_socdata *socdata)
{
struct device *dev = &pdev->dev;
struct uniphier_pinctrl_priv *priv;
struct device_node *parent;
int ret;
if (!socdata ||
!socdata->pins || !socdata->npins ||
!socdata->groups || !socdata->groups_count ||
!socdata->functions || !socdata->functions_count) {
dev_err(dev, "pinctrl socdata lacks necessary members\n");
return -EINVAL;
}
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
parent = of_get_parent(dev->of_node);
priv->regmap = syscon_node_to_regmap(parent);
of_node_put(parent);
if (IS_ERR(priv->regmap)) {
dev_err(dev, "failed to get regmap\n");
return PTR_ERR(priv->regmap);
}
priv->socdata = socdata;
priv->pctldesc.name = dev->driver->name;
priv->pctldesc.pins = socdata->pins;
priv->pctldesc.npins = socdata->npins;
priv->pctldesc.pctlops = &uniphier_pctlops;
priv->pctldesc.pmxops = &uniphier_pmxops;
priv->pctldesc.confops = &uniphier_confops;
priv->pctldesc.owner = dev->driver->owner;
ret = uniphier_pinctrl_pm_init(dev, priv);
if (ret)
return ret;
priv->pctldev = devm_pinctrl_register(dev, &priv->pctldesc, priv);
if (IS_ERR(priv->pctldev)) {
dev_err(dev, "failed to register UniPhier pinctrl driver\n");
return PTR_ERR(priv->pctldev);
}
platform_set_drvdata(pdev, priv);
return 0;
}