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OpenCloudOS-Kernel/drivers/pinctrl/qcom/pinctrl-spmi-mpp.c

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/*
* Copyright (c) 2012-2014, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* 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/gpio.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/pinctrl/pinconf-generic.h>
#include <linux/pinctrl/pinconf.h>
#include <linux/pinctrl/pinmux.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <dt-bindings/pinctrl/qcom,pmic-mpp.h>
#include "../core.h"
#include "../pinctrl-utils.h"
#define PMIC_MPP_ADDRESS_RANGE 0x100
/*
* Pull Up Values - it indicates whether a pull-up should be
* applied for bidirectional mode only. The hardware ignores the
* configuration when operating in other modes.
*/
#define PMIC_MPP_PULL_UP_0P6KOHM 0
#define PMIC_MPP_PULL_UP_10KOHM 1
#define PMIC_MPP_PULL_UP_30KOHM 2
#define PMIC_MPP_PULL_UP_OPEN 3
/* type registers base address bases */
#define PMIC_MPP_REG_TYPE 0x4
#define PMIC_MPP_REG_SUBTYPE 0x5
/* mpp peripheral type and subtype values */
#define PMIC_MPP_TYPE 0x11
#define PMIC_MPP_SUBTYPE_4CH_NO_ANA_OUT 0x3
#define PMIC_MPP_SUBTYPE_ULT_4CH_NO_ANA_OUT 0x4
#define PMIC_MPP_SUBTYPE_4CH_NO_SINK 0x5
#define PMIC_MPP_SUBTYPE_ULT_4CH_NO_SINK 0x6
#define PMIC_MPP_SUBTYPE_4CH_FULL_FUNC 0x7
#define PMIC_MPP_SUBTYPE_8CH_FULL_FUNC 0xf
#define PMIC_MPP_REG_RT_STS 0x10
#define PMIC_MPP_REG_RT_STS_VAL_MASK 0x1
/* control register base address bases */
#define PMIC_MPP_REG_MODE_CTL 0x40
#define PMIC_MPP_REG_DIG_VIN_CTL 0x41
#define PMIC_MPP_REG_DIG_PULL_CTL 0x42
#define PMIC_MPP_REG_DIG_IN_CTL 0x43
#define PMIC_MPP_REG_EN_CTL 0x46
#define PMIC_MPP_REG_AIN_CTL 0x4a
/* PMIC_MPP_REG_MODE_CTL */
#define PMIC_MPP_REG_MODE_VALUE_MASK 0x1
#define PMIC_MPP_REG_MODE_FUNCTION_SHIFT 1
#define PMIC_MPP_REG_MODE_FUNCTION_MASK 0x7
#define PMIC_MPP_REG_MODE_DIR_SHIFT 4
#define PMIC_MPP_REG_MODE_DIR_MASK 0x7
/* PMIC_MPP_REG_DIG_VIN_CTL */
#define PMIC_MPP_REG_VIN_SHIFT 0
#define PMIC_MPP_REG_VIN_MASK 0x7
/* PMIC_MPP_REG_DIG_PULL_CTL */
#define PMIC_MPP_REG_PULL_SHIFT 0
#define PMIC_MPP_REG_PULL_MASK 0x7
/* PMIC_MPP_REG_EN_CTL */
#define PMIC_MPP_REG_MASTER_EN_SHIFT 7
/* PMIC_MPP_REG_AIN_CTL */
#define PMIC_MPP_REG_AIN_ROUTE_SHIFT 0
#define PMIC_MPP_REG_AIN_ROUTE_MASK 0x7
#define PMIC_MPP_PHYSICAL_OFFSET 1
/* Qualcomm specific pin configurations */
#define PMIC_MPP_CONF_AMUX_ROUTE (PIN_CONFIG_END + 1)
#define PMIC_MPP_CONF_ANALOG_MODE (PIN_CONFIG_END + 2)
/**
* struct pmic_mpp_pad - keep current MPP settings
* @base: Address base in SPMI device.
* @irq: IRQ number which this MPP generate.
* @is_enabled: Set to false when MPP should be put in high Z state.
* @out_value: Cached pin output value.
* @output_enabled: Set to true if MPP output logic is enabled.
* @input_enabled: Set to true if MPP input buffer logic is enabled.
* @analog_mode: Set to true when MPP should operate in Analog Input, Analog
* Output or Bidirectional Analog mode.
* @num_sources: Number of power-sources supported by this MPP.
* @power_source: Current power-source used.
* @amux_input: Set the source for analog input.
* @pullup: Pullup resistor value. Valid in Bidirectional mode only.
* @function: See pmic_mpp_functions[].
*/
struct pmic_mpp_pad {
u16 base;
int irq;
bool is_enabled;
bool out_value;
bool output_enabled;
bool input_enabled;
bool analog_mode;
unsigned int num_sources;
unsigned int power_source;
unsigned int amux_input;
unsigned int pullup;
unsigned int function;
};
struct pmic_mpp_state {
struct device *dev;
struct regmap *map;
struct pinctrl_dev *ctrl;
struct gpio_chip chip;
};
struct pmic_mpp_bindings {
const char *property;
unsigned param;
};
static struct pmic_mpp_bindings pmic_mpp_bindings[] = {
{"qcom,amux-route", PMIC_MPP_CONF_AMUX_ROUTE},
{"qcom,analog-mode", PMIC_MPP_CONF_ANALOG_MODE},
};
static const char *const pmic_mpp_groups[] = {
"mpp1", "mpp2", "mpp3", "mpp4", "mpp5", "mpp6", "mpp7", "mpp8",
};
static const char *const pmic_mpp_functions[] = {
PMIC_MPP_FUNC_NORMAL, PMIC_MPP_FUNC_PAIRED,
"reserved1", "reserved2",
PMIC_MPP_FUNC_DTEST1, PMIC_MPP_FUNC_DTEST2,
PMIC_MPP_FUNC_DTEST3, PMIC_MPP_FUNC_DTEST4,
};
static inline struct pmic_mpp_state *to_mpp_state(struct gpio_chip *chip)
{
return container_of(chip, struct pmic_mpp_state, chip);
};
static int pmic_mpp_read(struct pmic_mpp_state *state,
struct pmic_mpp_pad *pad, unsigned int addr)
{
unsigned int val;
int ret;
ret = regmap_read(state->map, pad->base + addr, &val);
if (ret < 0)
dev_err(state->dev, "read 0x%x failed\n", addr);
else
ret = val;
return ret;
}
static int pmic_mpp_write(struct pmic_mpp_state *state,
struct pmic_mpp_pad *pad, unsigned int addr,
unsigned int val)
{
int ret;
ret = regmap_write(state->map, pad->base + addr, val);
if (ret < 0)
dev_err(state->dev, "write 0x%x failed\n", addr);
return ret;
}
static int pmic_mpp_get_groups_count(struct pinctrl_dev *pctldev)
{
/* Every PIN is a group */
return pctldev->desc->npins;
}
static const char *pmic_mpp_get_group_name(struct pinctrl_dev *pctldev,
unsigned pin)
{
return pctldev->desc->pins[pin].name;
}
static int pmic_mpp_get_group_pins(struct pinctrl_dev *pctldev,
unsigned pin,
const unsigned **pins, unsigned *num_pins)
{
*pins = &pctldev->desc->pins[pin].number;
*num_pins = 1;
return 0;
}
static int pmic_mpp_parse_dt_config(struct device_node *np,
struct pinctrl_dev *pctldev,
unsigned long **configs,
unsigned int *nconfs)
{
struct pmic_mpp_bindings *par;
unsigned long cfg;
int ret, i;
u32 val;
for (i = 0; i < ARRAY_SIZE(pmic_mpp_bindings); i++) {
par = &pmic_mpp_bindings[i];
ret = of_property_read_u32(np, par->property, &val);
/* property not found */
if (ret == -EINVAL)
continue;
/* use zero as default value, when no value is specified */
if (ret)
val = 0;
dev_dbg(pctldev->dev, "found %s with value %u\n",
par->property, val);
cfg = pinconf_to_config_packed(par->param, val);
ret = pinctrl_utils_add_config(pctldev, configs, nconfs, cfg);
if (ret)
return ret;
}
return 0;
}
static int pmic_mpp_dt_subnode_to_map(struct pinctrl_dev *pctldev,
struct device_node *np,
struct pinctrl_map **map,
unsigned *reserv, unsigned *nmaps,
enum pinctrl_map_type type)
{
unsigned long *configs = NULL;
unsigned nconfs = 0;
struct property *prop;
const char *group;
int ret;
ret = pmic_mpp_parse_dt_config(np, pctldev, &configs, &nconfs);
if (ret < 0)
return ret;
if (!nconfs)
return 0;
ret = of_property_count_strings(np, "pins");
if (ret < 0)
goto exit;
ret = pinctrl_utils_reserve_map(pctldev, map, reserv, nmaps, ret);
if (ret < 0)
goto exit;
of_property_for_each_string(np, "pins", prop, group) {
ret = pinctrl_utils_add_map_configs(pctldev, map,
reserv, nmaps, group,
configs, nconfs, type);
if (ret < 0)
break;
}
exit:
kfree(configs);
return ret;
}
static int pmic_mpp_dt_node_to_map(struct pinctrl_dev *pctldev,
struct device_node *np_config,
struct pinctrl_map **map, unsigned *nmaps)
{
struct device_node *np;
enum pinctrl_map_type type;
unsigned reserv;
int ret;
ret = 0;
*map = NULL;
*nmaps = 0;
reserv = 0;
type = PIN_MAP_TYPE_CONFIGS_GROUP;
for_each_child_of_node(np_config, np) {
ret = pinconf_generic_dt_subnode_to_map(pctldev, np, map,
&reserv, nmaps, type);
if (ret)
break;
ret = pmic_mpp_dt_subnode_to_map(pctldev, np, map, &reserv,
nmaps, type);
if (ret)
break;
}
if (ret < 0)
pinctrl_utils_dt_free_map(pctldev, *map, *nmaps);
return ret;
}
static const struct pinctrl_ops pmic_mpp_pinctrl_ops = {
.get_groups_count = pmic_mpp_get_groups_count,
.get_group_name = pmic_mpp_get_group_name,
.get_group_pins = pmic_mpp_get_group_pins,
.dt_node_to_map = pmic_mpp_dt_node_to_map,
.dt_free_map = pinctrl_utils_dt_free_map,
};
static int pmic_mpp_get_functions_count(struct pinctrl_dev *pctldev)
{
return ARRAY_SIZE(pmic_mpp_functions);
}
static const char *pmic_mpp_get_function_name(struct pinctrl_dev *pctldev,
unsigned function)
{
return pmic_mpp_functions[function];
}
static int pmic_mpp_get_function_groups(struct pinctrl_dev *pctldev,
unsigned function,
const char *const **groups,
unsigned *const num_qgroups)
{
*groups = pmic_mpp_groups;
*num_qgroups = pctldev->desc->npins;
return 0;
}
static int pmic_mpp_set_mux(struct pinctrl_dev *pctldev, unsigned function,
unsigned pin)
{
struct pmic_mpp_state *state = pinctrl_dev_get_drvdata(pctldev);
struct pmic_mpp_pad *pad;
unsigned int val;
int ret;
pad = pctldev->desc->pins[pin].drv_data;
pad->function = function;
if (!pad->analog_mode) {
val = 0; /* just digital input */
if (pad->output_enabled) {
if (pad->input_enabled)
val = 2; /* digital input and output */
else
val = 1; /* just digital output */
}
} else {
val = 4; /* just analog input */
if (pad->output_enabled) {
if (pad->input_enabled)
val = 3; /* analog input and output */
else
val = 5; /* just analog output */
}
}
val = val << PMIC_MPP_REG_MODE_DIR_SHIFT;
val |= pad->function << PMIC_MPP_REG_MODE_FUNCTION_SHIFT;
val |= pad->out_value & PMIC_MPP_REG_MODE_VALUE_MASK;
ret = pmic_mpp_write(state, pad, PMIC_MPP_REG_MODE_CTL, val);
if (ret < 0)
return ret;
val = pad->is_enabled << PMIC_MPP_REG_MASTER_EN_SHIFT;
return pmic_mpp_write(state, pad, PMIC_MPP_REG_EN_CTL, val);
}
static const struct pinmux_ops pmic_mpp_pinmux_ops = {
.get_functions_count = pmic_mpp_get_functions_count,
.get_function_name = pmic_mpp_get_function_name,
.get_function_groups = pmic_mpp_get_function_groups,
.set_mux = pmic_mpp_set_mux,
};
static int pmic_mpp_config_get(struct pinctrl_dev *pctldev,
unsigned int pin, unsigned long *config)
{
unsigned param = pinconf_to_config_param(*config);
struct pmic_mpp_pad *pad;
unsigned arg = 0;
pad = pctldev->desc->pins[pin].drv_data;
switch (param) {
case PIN_CONFIG_BIAS_DISABLE:
arg = pad->pullup == PMIC_MPP_PULL_UP_OPEN;
break;
case PIN_CONFIG_BIAS_PULL_UP:
switch (pad->pullup) {
case PMIC_MPP_PULL_UP_OPEN:
arg = 0;
break;
case PMIC_MPP_PULL_UP_0P6KOHM:
arg = 600;
break;
case PMIC_MPP_PULL_UP_10KOHM:
arg = 10000;
break;
case PMIC_MPP_PULL_UP_30KOHM:
arg = 30000;
break;
default:
return -EINVAL;
}
break;
case PIN_CONFIG_BIAS_HIGH_IMPEDANCE:
arg = !pad->is_enabled;
break;
case PIN_CONFIG_POWER_SOURCE:
arg = pad->power_source;
break;
case PIN_CONFIG_INPUT_ENABLE:
arg = pad->input_enabled;
break;
case PIN_CONFIG_OUTPUT:
arg = pad->out_value;
break;
case PMIC_MPP_CONF_AMUX_ROUTE:
arg = pad->amux_input;
break;
case PMIC_MPP_CONF_ANALOG_MODE:
arg = pad->analog_mode;
break;
default:
return -EINVAL;
}
/* Convert register value to pinconf value */
*config = pinconf_to_config_packed(param, arg);
return 0;
}
static int pmic_mpp_config_set(struct pinctrl_dev *pctldev, unsigned int pin,
unsigned long *configs, unsigned nconfs)
{
struct pmic_mpp_state *state = pinctrl_dev_get_drvdata(pctldev);
struct pmic_mpp_pad *pad;
unsigned param, arg;
unsigned int val;
int i, ret;
pad = pctldev->desc->pins[pin].drv_data;
for (i = 0; i < nconfs; i++) {
param = pinconf_to_config_param(configs[i]);
arg = pinconf_to_config_argument(configs[i]);
switch (param) {
case PIN_CONFIG_BIAS_DISABLE:
pad->pullup = PMIC_MPP_PULL_UP_OPEN;
break;
case PIN_CONFIG_BIAS_PULL_UP:
switch (arg) {
case 600:
pad->pullup = PMIC_MPP_PULL_UP_0P6KOHM;
break;
case 10000:
pad->pullup = PMIC_MPP_PULL_UP_10KOHM;
break;
case 30000:
pad->pullup = PMIC_MPP_PULL_UP_30KOHM;
break;
default:
return -EINVAL;
}
break;
case PIN_CONFIG_BIAS_HIGH_IMPEDANCE:
pad->is_enabled = false;
break;
case PIN_CONFIG_POWER_SOURCE:
if (arg >= pad->num_sources)
return -EINVAL;
pad->power_source = arg;
break;
case PIN_CONFIG_INPUT_ENABLE:
pad->input_enabled = arg ? true : false;
break;
case PIN_CONFIG_OUTPUT:
pad->output_enabled = true;
pad->out_value = arg;
break;
case PMIC_MPP_CONF_AMUX_ROUTE:
if (arg >= PMIC_MPP_AMUX_ROUTE_ABUS4)
return -EINVAL;
pad->amux_input = arg;
break;
case PMIC_MPP_CONF_ANALOG_MODE:
pad->analog_mode = true;
break;
default:
return -EINVAL;
}
}
val = pad->power_source << PMIC_MPP_REG_VIN_SHIFT;
ret = pmic_mpp_write(state, pad, PMIC_MPP_REG_DIG_VIN_CTL, val);
if (ret < 0)
return ret;
val = pad->pullup << PMIC_MPP_REG_PULL_SHIFT;
ret = pmic_mpp_write(state, pad, PMIC_MPP_REG_DIG_PULL_CTL, val);
if (ret < 0)
return ret;
val = pad->amux_input & PMIC_MPP_REG_AIN_ROUTE_MASK;
ret = pmic_mpp_write(state, pad, PMIC_MPP_REG_AIN_CTL, val);
if (ret < 0)
return ret;
if (!pad->analog_mode) {
val = 0; /* just digital input */
if (pad->output_enabled) {
if (pad->input_enabled)
val = 2; /* digital input and output */
else
val = 1; /* just digital output */
}
} else {
val = 4; /* just analog input */
if (pad->output_enabled) {
if (pad->input_enabled)
val = 3; /* analog input and output */
else
val = 5; /* just analog output */
}
}
val = val << PMIC_MPP_REG_MODE_DIR_SHIFT;
val |= pad->function << PMIC_MPP_REG_MODE_FUNCTION_SHIFT;
val |= pad->out_value & PMIC_MPP_REG_MODE_VALUE_MASK;
return pmic_mpp_write(state, pad, PMIC_MPP_REG_MODE_CTL, val);
}
static void pmic_mpp_config_dbg_show(struct pinctrl_dev *pctldev,
struct seq_file *s, unsigned pin)
{
struct pmic_mpp_state *state = pinctrl_dev_get_drvdata(pctldev);
struct pmic_mpp_pad *pad;
int ret, val;
static const char *const biases[] = {
"0.6kOhm", "10kOhm", "30kOhm", "Disabled"
};
pad = pctldev->desc->pins[pin].drv_data;
seq_printf(s, " mpp%-2d:", pin + PMIC_MPP_PHYSICAL_OFFSET);
val = pmic_mpp_read(state, pad, PMIC_MPP_REG_EN_CTL);
if (val < 0 || !(val >> PMIC_MPP_REG_MASTER_EN_SHIFT)) {
seq_puts(s, " ---");
} else {
if (pad->input_enabled) {
ret = pmic_mpp_read(state, pad, PMIC_MPP_REG_RT_STS);
if (ret < 0)
return;
ret &= PMIC_MPP_REG_RT_STS_VAL_MASK;
pad->out_value = ret;
}
seq_printf(s, " %-4s", pad->output_enabled ? "out" : "in");
seq_printf(s, " %-4s", pad->analog_mode ? "ana" : "dig");
seq_printf(s, " %-7s", pmic_mpp_functions[pad->function]);
seq_printf(s, " vin-%d", pad->power_source);
seq_printf(s, " %-8s", biases[pad->pullup]);
seq_printf(s, " %-4s", pad->out_value ? "high" : "low");
}
}
static const struct pinconf_ops pmic_mpp_pinconf_ops = {
.pin_config_group_get = pmic_mpp_config_get,
.pin_config_group_set = pmic_mpp_config_set,
.pin_config_group_dbg_show = pmic_mpp_config_dbg_show,
};
static int pmic_mpp_direction_input(struct gpio_chip *chip, unsigned pin)
{
struct pmic_mpp_state *state = to_mpp_state(chip);
unsigned long config;
config = pinconf_to_config_packed(PIN_CONFIG_INPUT_ENABLE, 1);
return pmic_mpp_config_set(state->ctrl, pin, &config, 1);
}
static int pmic_mpp_direction_output(struct gpio_chip *chip,
unsigned pin, int val)
{
struct pmic_mpp_state *state = to_mpp_state(chip);
unsigned long config;
config = pinconf_to_config_packed(PIN_CONFIG_OUTPUT, val);
return pmic_mpp_config_set(state->ctrl, pin, &config, 1);
}
static int pmic_mpp_get(struct gpio_chip *chip, unsigned pin)
{
struct pmic_mpp_state *state = to_mpp_state(chip);
struct pmic_mpp_pad *pad;
int ret;
pad = state->ctrl->desc->pins[pin].drv_data;
if (pad->input_enabled) {
ret = pmic_mpp_read(state, pad, PMIC_MPP_REG_RT_STS);
if (ret < 0)
return ret;
pad->out_value = ret & PMIC_MPP_REG_RT_STS_VAL_MASK;
}
return pad->out_value;
}
static void pmic_mpp_set(struct gpio_chip *chip, unsigned pin, int value)
{
struct pmic_mpp_state *state = to_mpp_state(chip);
unsigned long config;
config = pinconf_to_config_packed(PIN_CONFIG_OUTPUT, value);
pmic_mpp_config_set(state->ctrl, pin, &config, 1);
}
static int pmic_mpp_request(struct gpio_chip *chip, unsigned base)
{
return pinctrl_request_gpio(chip->base + base);
}
static void pmic_mpp_free(struct gpio_chip *chip, unsigned base)
{
pinctrl_free_gpio(chip->base + base);
}
static int pmic_mpp_of_xlate(struct gpio_chip *chip,
const struct of_phandle_args *gpio_desc,
u32 *flags)
{
if (chip->of_gpio_n_cells < 2)
return -EINVAL;
if (flags)
*flags = gpio_desc->args[1];
return gpio_desc->args[0] - PMIC_MPP_PHYSICAL_OFFSET;
}
static int pmic_mpp_to_irq(struct gpio_chip *chip, unsigned pin)
{
struct pmic_mpp_state *state = to_mpp_state(chip);
struct pmic_mpp_pad *pad;
pad = state->ctrl->desc->pins[pin].drv_data;
return pad->irq;
}
static void pmic_mpp_dbg_show(struct seq_file *s, struct gpio_chip *chip)
{
struct pmic_mpp_state *state = to_mpp_state(chip);
unsigned i;
for (i = 0; i < chip->ngpio; i++) {
pmic_mpp_config_dbg_show(state->ctrl, s, i);
seq_puts(s, "\n");
}
}
static const struct gpio_chip pmic_mpp_gpio_template = {
.direction_input = pmic_mpp_direction_input,
.direction_output = pmic_mpp_direction_output,
.get = pmic_mpp_get,
.set = pmic_mpp_set,
.request = pmic_mpp_request,
.free = pmic_mpp_free,
.of_xlate = pmic_mpp_of_xlate,
.to_irq = pmic_mpp_to_irq,
.dbg_show = pmic_mpp_dbg_show,
};
static int pmic_mpp_populate(struct pmic_mpp_state *state,
struct pmic_mpp_pad *pad)
{
int type, subtype, val, dir;
type = pmic_mpp_read(state, pad, PMIC_MPP_REG_TYPE);
if (type < 0)
return type;
if (type != PMIC_MPP_TYPE) {
dev_err(state->dev, "incorrect block type 0x%x at 0x%x\n",
type, pad->base);
return -ENODEV;
}
subtype = pmic_mpp_read(state, pad, PMIC_MPP_REG_SUBTYPE);
if (subtype < 0)
return subtype;
switch (subtype) {
case PMIC_MPP_SUBTYPE_4CH_NO_ANA_OUT:
case PMIC_MPP_SUBTYPE_ULT_4CH_NO_ANA_OUT:
case PMIC_MPP_SUBTYPE_4CH_NO_SINK:
case PMIC_MPP_SUBTYPE_ULT_4CH_NO_SINK:
case PMIC_MPP_SUBTYPE_4CH_FULL_FUNC:
pad->num_sources = 4;
break;
case PMIC_MPP_SUBTYPE_8CH_FULL_FUNC:
pad->num_sources = 8;
break;
default:
dev_err(state->dev, "unknown MPP type 0x%x at 0x%x\n",
subtype, pad->base);
return -ENODEV;
}
val = pmic_mpp_read(state, pad, PMIC_MPP_REG_MODE_CTL);
if (val < 0)
return val;
pad->out_value = val & PMIC_MPP_REG_MODE_VALUE_MASK;
dir = val >> PMIC_MPP_REG_MODE_DIR_SHIFT;
dir &= PMIC_MPP_REG_MODE_DIR_MASK;
switch (dir) {
case 0:
pad->input_enabled = true;
pad->output_enabled = false;
pad->analog_mode = false;
break;
case 1:
pad->input_enabled = false;
pad->output_enabled = true;
pad->analog_mode = false;
break;
case 2:
pad->input_enabled = true;
pad->output_enabled = true;
pad->analog_mode = false;
break;
case 3:
pad->input_enabled = true;
pad->output_enabled = true;
pad->analog_mode = true;
break;
case 4:
pad->input_enabled = true;
pad->output_enabled = false;
pad->analog_mode = true;
break;
case 5:
pad->input_enabled = false;
pad->output_enabled = true;
pad->analog_mode = true;
break;
default:
dev_err(state->dev, "unknown MPP direction\n");
return -ENODEV;
}
pad->function = val >> PMIC_MPP_REG_MODE_FUNCTION_SHIFT;
pad->function &= PMIC_MPP_REG_MODE_FUNCTION_MASK;
val = pmic_mpp_read(state, pad, PMIC_MPP_REG_DIG_VIN_CTL);
if (val < 0)
return val;
pad->power_source = val >> PMIC_MPP_REG_VIN_SHIFT;
pad->power_source &= PMIC_MPP_REG_VIN_MASK;
val = pmic_mpp_read(state, pad, PMIC_MPP_REG_DIG_PULL_CTL);
if (val < 0)
return val;
pad->pullup = val >> PMIC_MPP_REG_PULL_SHIFT;
pad->pullup &= PMIC_MPP_REG_PULL_MASK;
val = pmic_mpp_read(state, pad, PMIC_MPP_REG_AIN_CTL);
if (val < 0)
return val;
pad->amux_input = val >> PMIC_MPP_REG_AIN_ROUTE_SHIFT;
pad->amux_input &= PMIC_MPP_REG_AIN_ROUTE_MASK;
/* Pin could be disabled with PIN_CONFIG_BIAS_HIGH_IMPEDANCE */
pad->is_enabled = true;
return 0;
}
static int pmic_mpp_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct pinctrl_pin_desc *pindesc;
struct pinctrl_desc *pctrldesc;
struct pmic_mpp_pad *pad, *pads;
struct pmic_mpp_state *state;
int ret, npins, i;
u32 res[2];
ret = of_property_read_u32_array(dev->of_node, "reg", res, 2);
if (ret < 0) {
dev_err(dev, "missing base address and/or range");
return ret;
}
npins = res[1] / PMIC_MPP_ADDRESS_RANGE;
if (!npins)
return -EINVAL;
BUG_ON(npins > ARRAY_SIZE(pmic_mpp_groups));
state = devm_kzalloc(dev, sizeof(*state), GFP_KERNEL);
if (!state)
return -ENOMEM;
platform_set_drvdata(pdev, state);
state->dev = &pdev->dev;
state->map = dev_get_regmap(dev->parent, NULL);
pindesc = devm_kcalloc(dev, npins, sizeof(*pindesc), GFP_KERNEL);
if (!pindesc)
return -ENOMEM;
pads = devm_kcalloc(dev, npins, sizeof(*pads), GFP_KERNEL);
if (!pads)
return -ENOMEM;
pctrldesc = devm_kzalloc(dev, sizeof(*pctrldesc), GFP_KERNEL);
if (!pctrldesc)
return -ENOMEM;
pctrldesc->pctlops = &pmic_mpp_pinctrl_ops;
pctrldesc->pmxops = &pmic_mpp_pinmux_ops;
pctrldesc->confops = &pmic_mpp_pinconf_ops;
pctrldesc->owner = THIS_MODULE;
pctrldesc->name = dev_name(dev);
pctrldesc->pins = pindesc;
pctrldesc->npins = npins;
for (i = 0; i < npins; i++, pindesc++) {
pad = &pads[i];
pindesc->drv_data = pad;
pindesc->number = i;
pindesc->name = pmic_mpp_groups[i];
pad->irq = platform_get_irq(pdev, i);
if (pad->irq < 0)
return pad->irq;
pad->base = res[0] + i * PMIC_MPP_ADDRESS_RANGE;
ret = pmic_mpp_populate(state, pad);
if (ret < 0)
return ret;
}
state->chip = pmic_mpp_gpio_template;
state->chip.dev = dev;
state->chip.base = -1;
state->chip.ngpio = npins;
state->chip.label = dev_name(dev);
state->chip.of_gpio_n_cells = 2;
state->chip.can_sleep = false;
state->ctrl = pinctrl_register(pctrldesc, dev, state);
if (!state->ctrl)
return -ENODEV;
ret = gpiochip_add(&state->chip);
if (ret) {
dev_err(state->dev, "can't add gpio chip\n");
goto err_chip;
}
ret = gpiochip_add_pin_range(&state->chip, dev_name(dev), 0, 0, npins);
if (ret) {
dev_err(dev, "failed to add pin range\n");
goto err_range;
}
return 0;
err_range:
gpiochip_remove(&state->chip);
err_chip:
pinctrl_unregister(state->ctrl);
return ret;
}
static int pmic_mpp_remove(struct platform_device *pdev)
{
struct pmic_mpp_state *state = platform_get_drvdata(pdev);
gpiochip_remove(&state->chip);
pinctrl_unregister(state->ctrl);
return 0;
}
static const struct of_device_id pmic_mpp_of_match[] = {
{ .compatible = "qcom,pm8841-mpp" }, /* 4 MPP's */
{ .compatible = "qcom,pm8916-mpp" }, /* 4 MPP's */
{ .compatible = "qcom,pm8941-mpp" }, /* 8 MPP's */
{ .compatible = "qcom,pma8084-mpp" }, /* 8 MPP's */
{ },
};
MODULE_DEVICE_TABLE(of, pmic_mpp_of_match);
static struct platform_driver pmic_mpp_driver = {
.driver = {
.name = "qcom-spmi-mpp",
.of_match_table = pmic_mpp_of_match,
},
.probe = pmic_mpp_probe,
.remove = pmic_mpp_remove,
};
module_platform_driver(pmic_mpp_driver);
MODULE_AUTHOR("Ivan T. Ivanov <iivanov@mm-sol.com>");
MODULE_DESCRIPTION("Qualcomm SPMI PMIC MPP pin control driver");
MODULE_ALIAS("platform:qcom-spmi-mpp");
MODULE_LICENSE("GPL v2");
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