#include <linux/mfd/max77620.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/property.h>
#include <linux/regmap.h>
#include <linux/pinctrl/pinctrl.h>
#include <linux/pinctrl/pinconf-generic.h>
#include <linux/pinctrl/pinconf.h>
#include <linux/pinctrl/pinmux.h>
#include "core.h"
#include "pinconf.h"
#include "pinctrl-utils.h"
#define MAX77620_PIN_NUM 8
enum max77620_pin_ppdrv {
MAX77620_PIN_UNCONFIG_DRV,
MAX77620_PIN_OD_DRV,
MAX77620_PIN_PP_DRV,
};
#define MAX77620_ACTIVE_FPS_SOURCE (PIN_CONFIG_END + 1)
#define MAX77620_ACTIVE_FPS_POWER_ON_SLOTS (PIN_CONFIG_END + 2)
#define MAX77620_ACTIVE_FPS_POWER_DOWN_SLOTS (PIN_CONFIG_END + 3)
#define MAX77620_SUSPEND_FPS_SOURCE (PIN_CONFIG_END + 4)
#define MAX77620_SUSPEND_FPS_POWER_ON_SLOTS (PIN_CONFIG_END + 5)
#define MAX77620_SUSPEND_FPS_POWER_DOWN_SLOTS (PIN_CONFIG_END + 6)
struct max77620_pin_function {
const char *name;
const char * const *groups;
unsigned int ngroups;
int mux_option;
};
static const struct pinconf_generic_params max77620_cfg_params[] = {
{
.property = "maxim,active-fps-source",
.param = MAX77620_ACTIVE_FPS_SOURCE,
}, {
.property = "maxim,active-fps-power-up-slot",
.param = MAX77620_ACTIVE_FPS_POWER_ON_SLOTS,
}, {
.property = "maxim,active-fps-power-down-slot",
.param = MAX77620_ACTIVE_FPS_POWER_DOWN_SLOTS,
}, {
.property = "maxim,suspend-fps-source",
.param = MAX77620_SUSPEND_FPS_SOURCE,
}, {
.property = "maxim,suspend-fps-power-up-slot",
.param = MAX77620_SUSPEND_FPS_POWER_ON_SLOTS,
}, {
.property = "maxim,suspend-fps-power-down-slot",
.param = MAX77620_SUSPEND_FPS_POWER_DOWN_SLOTS,
},
};
enum max77620_alternate_pinmux_option {
MAX77620_PINMUX_GPIO = 0,
MAX77620_PINMUX_LOW_POWER_MODE_CONTROL_IN = 1,
MAX77620_PINMUX_FLEXIBLE_POWER_SEQUENCER_OUT = 2,
MAX77620_PINMUX_32K_OUT1 = 3,
MAX77620_PINMUX_SD0_DYNAMIC_VOLTAGE_SCALING_IN = 4,
MAX77620_PINMUX_SD1_DYNAMIC_VOLTAGE_SCALING_IN = 5,
MAX77620_PINMUX_REFERENCE_OUT = 6,
};
struct max77620_pingroup {
const char *name;
const unsigned int pins[1];
unsigned int npins;
enum max77620_alternate_pinmux_option alt_option;
};
struct max77620_pin_info {
enum max77620_pin_ppdrv drv_type;
int pull_config;
};
struct max77620_fps_config {
int active_fps_src;
int active_power_up_slots;
int active_power_down_slots;
int suspend_fps_src;
int suspend_power_up_slots;
int suspend_power_down_slots;
};
struct max77620_pctrl_info {
struct device *dev;
struct pinctrl_dev *pctl;
struct regmap *rmap;
int pins_current_opt[MAX77620_GPIO_NR];
const struct max77620_pin_function *functions;
unsigned int num_functions;
const struct max77620_pingroup *pin_groups;
int num_pin_groups;
const struct pinctrl_pin_desc *pins;
unsigned int num_pins;
struct max77620_pin_info pin_info[MAX77620_PIN_NUM];
struct max77620_fps_config fps_config[MAX77620_PIN_NUM];
};
static const struct pinctrl_pin_desc max77620_pins_desc[] = {
PINCTRL_PIN(MAX77620_GPIO0, "gpio0"),
PINCTRL_PIN(MAX77620_GPIO1, "gpio1"),
PINCTRL_PIN(MAX77620_GPIO2, "gpio2"),
PINCTRL_PIN(MAX77620_GPIO3, "gpio3"),
PINCTRL_PIN(MAX77620_GPIO4, "gpio4"),
PINCTRL_PIN(MAX77620_GPIO5, "gpio5"),
PINCTRL_PIN(MAX77620_GPIO6, "gpio6"),
PINCTRL_PIN(MAX77620_GPIO7, "gpio7"),
};
static const char * const gpio_groups[] = {
"gpio0",
"gpio1",
"gpio2",
"gpio3",
"gpio4",
"gpio5",
"gpio6",
"gpio7",
};
#define FUNCTION_GROUP(fname, mux) \
{ \
.name = fname, \
.groups = gpio_groups, \
.ngroups = ARRAY_SIZE(gpio_groups), \
.mux_option = MAX77620_PINMUX_##mux, \
}
static const struct max77620_pin_function max77620_pin_function[] = {
FUNCTION_GROUP("gpio", GPIO),
FUNCTION_GROUP("lpm-control-in", LOW_POWER_MODE_CONTROL_IN),
FUNCTION_GROUP("fps-out", FLEXIBLE_POWER_SEQUENCER_OUT),
FUNCTION_GROUP("32k-out1", 32K_OUT1),
FUNCTION_GROUP("sd0-dvs-in", SD0_DYNAMIC_VOLTAGE_SCALING_IN),
FUNCTION_GROUP("sd1-dvs-in", SD1_DYNAMIC_VOLTAGE_SCALING_IN),
FUNCTION_GROUP("reference-out", REFERENCE_OUT),
};
#define MAX77620_PINGROUP(pg_name, pin_id, option) \
{ \
.name = #pg_name, \
.pins = {MAX77620_##pin_id}, \
.npins = 1, \
.alt_option = MAX77620_PINMUX_##option, \
}
static const struct max77620_pingroup max77620_pingroups[] = {
MAX77620_PINGROUP(gpio0, GPIO0, LOW_POWER_MODE_CONTROL_IN),
MAX77620_PINGROUP(gpio1, GPIO1, FLEXIBLE_POWER_SEQUENCER_OUT),
MAX77620_PINGROUP(gpio2, GPIO2, FLEXIBLE_POWER_SEQUENCER_OUT),
MAX77620_PINGROUP(gpio3, GPIO3, FLEXIBLE_POWER_SEQUENCER_OUT),
MAX77620_PINGROUP(gpio4, GPIO4, 32K_OUT1),
MAX77620_PINGROUP(gpio5, GPIO5, SD0_DYNAMIC_VOLTAGE_SCALING_IN),
MAX77620_PINGROUP(gpio6, GPIO6, SD1_DYNAMIC_VOLTAGE_SCALING_IN),
MAX77620_PINGROUP(gpio7, GPIO7, REFERENCE_OUT),
};
static int max77620_pinctrl_get_groups_count(struct pinctrl_dev *pctldev)
{
struct max77620_pctrl_info *mpci = pinctrl_dev_get_drvdata(pctldev);
return mpci->num_pin_groups;
}
static const char *max77620_pinctrl_get_group_name(
struct pinctrl_dev *pctldev, unsigned int group)
{
struct max77620_pctrl_info *mpci = pinctrl_dev_get_drvdata(pctldev);
return mpci->pin_groups[group].name;
}
static int max77620_pinctrl_get_group_pins(
struct pinctrl_dev *pctldev, unsigned int group,
const unsigned int **pins, unsigned int *num_pins)
{
struct max77620_pctrl_info *mpci = pinctrl_dev_get_drvdata(pctldev);
*pins = mpci->pin_groups[group].pins;
*num_pins = mpci->pin_groups[group].npins;
return 0;
}
static const struct pinctrl_ops max77620_pinctrl_ops = {
.get_groups_count = max77620_pinctrl_get_groups_count,
.get_group_name = max77620_pinctrl_get_group_name,
.get_group_pins = max77620_pinctrl_get_group_pins,
.dt_node_to_map = pinconf_generic_dt_node_to_map_pin,
.dt_free_map = pinctrl_utils_free_map,
};
static int max77620_pinctrl_get_funcs_count(struct pinctrl_dev *pctldev)
{
struct max77620_pctrl_info *mpci = pinctrl_dev_get_drvdata(pctldev);
return mpci->num_functions;
}
static const char *max77620_pinctrl_get_func_name(struct pinctrl_dev *pctldev,
unsigned int function)
{
struct max77620_pctrl_info *mpci = pinctrl_dev_get_drvdata(pctldev);
return mpci->functions[function].name;
}
static int max77620_pinctrl_get_func_groups(struct pinctrl_dev *pctldev,
unsigned int function,
const char * const **groups,
unsigned int * const num_groups)
{
struct max77620_pctrl_info *mpci = pinctrl_dev_get_drvdata(pctldev);
*groups = mpci->functions[function].groups;
*num_groups = mpci->functions[function].ngroups;
return 0;
}
static int max77620_pinctrl_enable(struct pinctrl_dev *pctldev,
unsigned int function, unsigned int group)
{
struct max77620_pctrl_info *mpci = pinctrl_dev_get_drvdata(pctldev);
u8 val;
int ret;
if (function == MAX77620_PINMUX_GPIO) {
val = 0;
} else if (function == mpci->pin_groups[group].alt_option) {
val = 1 << group;
} else {
dev_err(mpci->dev, "GPIO %u doesn't have function %u\n",
group, function);
return -EINVAL;
}
ret = regmap_update_bits(mpci->rmap, MAX77620_REG_AME_GPIO,
BIT(group), val);
if (ret < 0)
dev_err(mpci->dev, "REG AME GPIO update failed: %d\n", ret);
return ret;
}
static const struct pinmux_ops max77620_pinmux_ops = {
.get_functions_count = max77620_pinctrl_get_funcs_count,
.get_function_name = max77620_pinctrl_get_func_name,
.get_function_groups = max77620_pinctrl_get_func_groups,
.set_mux = max77620_pinctrl_enable,
};
static int max77620_pinconf_get(struct pinctrl_dev *pctldev,
unsigned int pin, unsigned long *config)
{
struct max77620_pctrl_info *mpci = pinctrl_dev_get_drvdata(pctldev);
struct device *dev = mpci->dev;
enum pin_config_param param = pinconf_to_config_param(*config);
unsigned int val;
int arg = 0;
int ret;
switch (param) {
case PIN_CONFIG_DRIVE_OPEN_DRAIN:
if (mpci->pin_info[pin].drv_type == MAX77620_PIN_OD_DRV)
arg = 1;
break;
case PIN_CONFIG_DRIVE_PUSH_PULL:
if (mpci->pin_info[pin].drv_type == MAX77620_PIN_PP_DRV)
arg = 1;
break;
case PIN_CONFIG_BIAS_PULL_UP:
ret = regmap_read(mpci->rmap, MAX77620_REG_PUE_GPIO, &val);
if (ret < 0) {
dev_err(dev, "Reg PUE_GPIO read failed: %d\n", ret);
return ret;
}
if (val & BIT(pin))
arg = 1;
break;
case PIN_CONFIG_BIAS_PULL_DOWN:
ret = regmap_read(mpci->rmap, MAX77620_REG_PDE_GPIO, &val);
if (ret < 0) {
dev_err(dev, "Reg PDE_GPIO read failed: %d\n", ret);
return ret;
}
if (val & BIT(pin))
arg = 1;
break;
default:
dev_err(dev, "Properties not supported\n");
return -ENOTSUPP;
}
*config = pinconf_to_config_packed(param, (u16)arg);
return 0;
}
static int max77620_get_default_fps(struct max77620_pctrl_info *mpci,
int addr, int *fps)
{
unsigned int val;
int ret;
ret = regmap_read(mpci->rmap, addr, &val);
if (ret < 0) {
dev_err(mpci->dev, "Reg PUE_GPIO read failed: %d\n", ret);
return ret;
}
*fps = (val & MAX77620_FPS_SRC_MASK) >> MAX77620_FPS_SRC_SHIFT;
return 0;
}
static int max77620_set_fps_param(struct max77620_pctrl_info *mpci,
int pin, int param)
{
struct max77620_fps_config *fps_config = &mpci->fps_config[pin];
int addr, ret;
int param_val;
int mask, shift;
if ((pin < MAX77620_GPIO1) || (pin > MAX77620_GPIO3))
return 0;
addr = MAX77620_REG_FPS_GPIO1 + pin - 1;
switch (param) {
case MAX77620_ACTIVE_FPS_SOURCE:
case MAX77620_SUSPEND_FPS_SOURCE:
mask = MAX77620_FPS_SRC_MASK;
shift = MAX77620_FPS_SRC_SHIFT;
param_val = fps_config->active_fps_src;
if (param == MAX77620_SUSPEND_FPS_SOURCE)
param_val = fps_config->suspend_fps_src;
break;
case MAX77620_ACTIVE_FPS_POWER_ON_SLOTS:
case MAX77620_SUSPEND_FPS_POWER_ON_SLOTS:
mask = MAX77620_FPS_PU_PERIOD_MASK;
shift = MAX77620_FPS_PU_PERIOD_SHIFT;
param_val = fps_config->active_power_up_slots;
if (param == MAX77620_SUSPEND_FPS_POWER_ON_SLOTS)
param_val = fps_config->suspend_power_up_slots;
break;
case MAX77620_ACTIVE_FPS_POWER_DOWN_SLOTS:
case MAX77620_SUSPEND_FPS_POWER_DOWN_SLOTS:
mask = MAX77620_FPS_PD_PERIOD_MASK;
shift = MAX77620_FPS_PD_PERIOD_SHIFT;
param_val = fps_config->active_power_down_slots;
if (param == MAX77620_SUSPEND_FPS_POWER_DOWN_SLOTS)
param_val = fps_config->suspend_power_down_slots;
break;
default:
dev_err(mpci->dev, "Invalid parameter %d for pin %d\n",
param, pin);
return -EINVAL;
}
if (param_val < 0)
return 0;
ret = regmap_update_bits(mpci->rmap, addr, mask, param_val << shift);
if (ret < 0)
dev_err(mpci->dev, "Reg 0x%02x update failed %d\n", addr, ret);
return ret;
}
static int max77620_pinconf_set(struct pinctrl_dev *pctldev,
unsigned int pin, unsigned long *configs,
unsigned int num_configs)
{
struct max77620_pctrl_info *mpci = pinctrl_dev_get_drvdata(pctldev);
struct device *dev = mpci->dev;
struct max77620_fps_config *fps_config;
int param;
u32 param_val;
unsigned int val;
unsigned int pu_val;
unsigned int pd_val;
int addr, ret;
int i;
for (i = 0; i < num_configs; i++) {
param = pinconf_to_config_param(configs[i]);
param_val = pinconf_to_config_argument(configs[i]);
switch (param) {
case PIN_CONFIG_DRIVE_OPEN_DRAIN:
val = param_val ? 0 : 1;
ret = regmap_update_bits(mpci->rmap,
MAX77620_REG_GPIO0 + pin,
MAX77620_CNFG_GPIO_DRV_MASK,
val);
if (ret)
goto report_update_failure;
mpci->pin_info[pin].drv_type = val ?
MAX77620_PIN_PP_DRV : MAX77620_PIN_OD_DRV;
break;
case PIN_CONFIG_DRIVE_PUSH_PULL:
val = param_val ? 1 : 0;
ret = regmap_update_bits(mpci->rmap,
MAX77620_REG_GPIO0 + pin,
MAX77620_CNFG_GPIO_DRV_MASK,
val);
if (ret)
goto report_update_failure;
mpci->pin_info[pin].drv_type = val ?
MAX77620_PIN_PP_DRV : MAX77620_PIN_OD_DRV;
break;
case MAX77620_ACTIVE_FPS_SOURCE:
case MAX77620_ACTIVE_FPS_POWER_ON_SLOTS:
case MAX77620_ACTIVE_FPS_POWER_DOWN_SLOTS:
if ((pin < MAX77620_GPIO1) || (pin > MAX77620_GPIO3))
return -EINVAL;
fps_config = &mpci->fps_config[pin];
if ((param == MAX77620_ACTIVE_FPS_SOURCE) &&
(param_val == MAX77620_FPS_SRC_DEF)) {
addr = MAX77620_REG_FPS_GPIO1 + pin - 1;
ret = max77620_get_default_fps(
mpci, addr,
&fps_config->active_fps_src);
if (ret < 0)
return ret;
break;
}
if (param == MAX77620_ACTIVE_FPS_SOURCE)
fps_config->active_fps_src = param_val;
else if (param == MAX77620_ACTIVE_FPS_POWER_ON_SLOTS)
fps_config->active_power_up_slots = param_val;
else
fps_config->active_power_down_slots = param_val;
ret = max77620_set_fps_param(mpci, pin, param);
if (ret < 0)
return ret;
break;
case MAX77620_SUSPEND_FPS_SOURCE:
case MAX77620_SUSPEND_FPS_POWER_ON_SLOTS:
case MAX77620_SUSPEND_FPS_POWER_DOWN_SLOTS:
if ((pin < MAX77620_GPIO1) || (pin > MAX77620_GPIO3))
return -EINVAL;
fps_config = &mpci->fps_config[pin];
if ((param == MAX77620_SUSPEND_FPS_SOURCE) &&
(param_val == MAX77620_FPS_SRC_DEF)) {
addr = MAX77620_REG_FPS_GPIO1 + pin - 1;
ret = max77620_get_default_fps(
mpci, addr,
&fps_config->suspend_fps_src);
if (ret < 0)
return ret;
break;
}
if (param == MAX77620_SUSPEND_FPS_SOURCE)
fps_config->suspend_fps_src = param_val;
else if (param == MAX77620_SUSPEND_FPS_POWER_ON_SLOTS)
fps_config->suspend_power_up_slots = param_val;
else
fps_config->suspend_power_down_slots =
param_val;
break;
case PIN_CONFIG_BIAS_PULL_UP:
case PIN_CONFIG_BIAS_PULL_DOWN:
pu_val = (param == PIN_CONFIG_BIAS_PULL_UP) ?
BIT(pin) : 0;
pd_val = (param == PIN_CONFIG_BIAS_PULL_DOWN) ?
BIT(pin) : 0;
ret = regmap_update_bits(mpci->rmap,
MAX77620_REG_PUE_GPIO,
BIT(pin), pu_val);
if (ret < 0) {
dev_err(dev, "PUE_GPIO update failed: %d\n",
ret);
return ret;
}
ret = regmap_update_bits(mpci->rmap,
MAX77620_REG_PDE_GPIO,
BIT(pin), pd_val);
if (ret < 0) {
dev_err(dev, "PDE_GPIO update failed: %d\n",
ret);
return ret;
}
break;
default:
dev_err(dev, "Properties not supported\n");
return -ENOTSUPP;
}
}
return 0;
report_update_failure:
dev_err(dev, "Reg 0x%02x update failed %d\n",
MAX77620_REG_GPIO0 + pin, ret);
return ret;
}
static const struct pinconf_ops max77620_pinconf_ops = {
.pin_config_get = max77620_pinconf_get,
.pin_config_set = max77620_pinconf_set,
};
static struct pinctrl_desc max77620_pinctrl_desc = {
.pctlops = &max77620_pinctrl_ops,
.pmxops = &max77620_pinmux_ops,
.confops = &max77620_pinconf_ops,
};
static int max77620_pinctrl_probe(struct platform_device *pdev)
{
struct max77620_chip *max77620 = dev_get_drvdata(pdev->dev.parent);
struct max77620_pctrl_info *mpci;
int i;
device_set_node(&pdev->dev, dev_fwnode(pdev->dev.parent));
mpci = devm_kzalloc(&pdev->dev, sizeof(*mpci), GFP_KERNEL);
if (!mpci)
return -ENOMEM;
mpci->dev = &pdev->dev;
mpci->rmap = max77620->rmap;
mpci->pins = max77620_pins_desc;
mpci->num_pins = ARRAY_SIZE(max77620_pins_desc);
mpci->functions = max77620_pin_function;
mpci->num_functions = ARRAY_SIZE(max77620_pin_function);
mpci->pin_groups = max77620_pingroups;
mpci->num_pin_groups = ARRAY_SIZE(max77620_pingroups);
platform_set_drvdata(pdev, mpci);
max77620_pinctrl_desc.name = dev_name(&pdev->dev);
max77620_pinctrl_desc.pins = max77620_pins_desc;
max77620_pinctrl_desc.npins = ARRAY_SIZE(max77620_pins_desc);
max77620_pinctrl_desc.num_custom_params =
ARRAY_SIZE(max77620_cfg_params);
max77620_pinctrl_desc.custom_params = max77620_cfg_params;
for (i = 0; i < MAX77620_PIN_NUM; ++i) {
mpci->fps_config[i].active_fps_src = -1;
mpci->fps_config[i].active_power_up_slots = -1;
mpci->fps_config[i].active_power_down_slots = -1;
mpci->fps_config[i].suspend_fps_src = -1;
mpci->fps_config[i].suspend_power_up_slots = -1;
mpci->fps_config[i].suspend_power_down_slots = -1;
}
mpci->pctl = devm_pinctrl_register(&pdev->dev, &max77620_pinctrl_desc,
mpci);
if (IS_ERR(mpci->pctl)) {
dev_err(&pdev->dev, "Couldn't register pinctrl driver\n");
return PTR_ERR(mpci->pctl);
}
return 0;
}
#ifdef CONFIG_PM_SLEEP
static int max77620_suspend_fps_param[] = {
MAX77620_SUSPEND_FPS_SOURCE,
MAX77620_SUSPEND_FPS_POWER_ON_SLOTS,
MAX77620_SUSPEND_FPS_POWER_DOWN_SLOTS,
};
static int max77620_active_fps_param[] = {
MAX77620_ACTIVE_FPS_SOURCE,
MAX77620_ACTIVE_FPS_POWER_ON_SLOTS,
MAX77620_ACTIVE_FPS_POWER_DOWN_SLOTS,
};
static int max77620_pinctrl_suspend(struct device *dev)
{
struct max77620_pctrl_info *mpci = dev_get_drvdata(dev);
int pin, p;
for (pin = 0; pin < MAX77620_PIN_NUM; ++pin) {
if ((pin < MAX77620_GPIO1) || (pin > MAX77620_GPIO3))
continue;
for (p = 0; p < 3; ++p)
max77620_set_fps_param(
mpci, pin, max77620_suspend_fps_param[p]);
}
return 0;
};
static int max77620_pinctrl_resume(struct device *dev)
{
struct max77620_pctrl_info *mpci = dev_get_drvdata(dev);
int pin, p;
for (pin = 0; pin < MAX77620_PIN_NUM; ++pin) {
if ((pin < MAX77620_GPIO1) || (pin > MAX77620_GPIO3))
continue;
for (p = 0; p < 3; ++p)
max77620_set_fps_param(
mpci, pin, max77620_active_fps_param[p]);
}
return 0;
}
#endif
static const struct dev_pm_ops max77620_pinctrl_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(
max77620_pinctrl_suspend, max77620_pinctrl_resume)
};
static const struct platform_device_id max77620_pinctrl_devtype[] = {
{ .name = "max77620-pinctrl", },
{ .name = "max20024-pinctrl", },
{},
};
MODULE_DEVICE_TABLE(platform, max77620_pinctrl_devtype);
static struct platform_driver max77620_pinctrl_driver = {
.driver = {
.name = "max77620-pinctrl",
.pm = &max77620_pinctrl_pm_ops,
},
.probe = max77620_pinctrl_probe,
.id_table = max77620_pinctrl_devtype,
};
module_platform_driver(max77620_pinctrl_driver);
MODULE_DESCRIPTION("MAX77620/MAX20024 pin control driver");
MODULE_AUTHOR("Chaitanya Bandi<bandik@nvidia.com>");
MODULE_AUTHOR("Laxman Dewangan<ldewangan@nvidia.com>");
MODULE_LICENSE("GPL v2"