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pinctrl: qcom: ssbi: Family A gpio & mpp drivers

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This introduces pinctrl drivers for gpio and mpp blocks found in family A
PMICs.

Tested-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Bjorn Andersson 2015-07-14 23:40:35 -07:00 committed by Linus Walleij
parent eb5c144cbb
commit b4c45fe974
6 changed files with 1743 additions and 0 deletions
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5
Documentation/devicetree/bindings/pinctrl/qcom,pmic-mpp.txt
View File

@ -7,8 +7,13 @@ of PMIC's from Qualcomm.
Usage: required
Value type: <string>
Definition: Should contain one of:
"qcom,pm8018-mpp",
"qcom,pm8038-mpp",
"qcom,pm8821-mpp",
"qcom,pm8841-mpp",
"qcom,pm8916-mpp",
"qcom,pm8917-mpp",
"qcom,pm8921-mpp",
"qcom,pm8941-mpp",
"qcom,pma8084-mpp",

12
drivers/pinctrl/qcom/Kconfig
View File

@ -76,4 +76,16 @@ config PINCTRL_QCOM_SPMI_PMIC
which are using SPMI for communication with SoC. Example PMIC's
devices are pm8841, pm8941 and pma8084.
config PINCTRL_QCOM_SSBI_PMIC
tristate "Qualcomm SSBI PMIC pin controller driver"
depends on GPIOLIB && OF
select PINMUX
select PINCONF
select GENERIC_PINCONF
help
This is the pinctrl, pinmux, pinconf and gpiolib driver for the
Qualcomm GPIO and MPP blocks found in the Qualcomm PMIC's chips,
which are using SSBI for communication with SoC. Example PMIC's
devices are pm8058 and pm8921.
endif

2
drivers/pinctrl/qcom/Makefile
View File

@ -9,3 +9,5 @@ obj-$(CONFIG_PINCTRL_MSM8X74) += pinctrl-msm8x74.o
obj-$(CONFIG_PINCTRL_MSM8916) += pinctrl-msm8916.o
obj-$(CONFIG_PINCTRL_QCOM_SPMI_PMIC) += pinctrl-spmi-gpio.o
obj-$(CONFIG_PINCTRL_QCOM_SPMI_PMIC) += pinctrl-spmi-mpp.o
obj-$(CONFIG_PINCTRL_QCOM_SSBI_PMIC) += pinctrl-ssbi-gpio.o
obj-$(CONFIG_PINCTRL_QCOM_SSBI_PMIC) += pinctrl-ssbi-mpp.o

791
drivers/pinctrl/qcom/pinctrl-ssbi-gpio.c Normal file
View File

@ -0,0 +1,791 @@
/*
* Copyright (c) 2015, Sony Mobile Communications AB.
* Copyright (c) 2013, 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/module.h>
#include <linux/platform_device.h>
#include <linux/pinctrl/pinctrl.h>
#include <linux/pinctrl/pinmux.h>
#include <linux/pinctrl/pinconf.h>
#include <linux/pinctrl/pinconf-generic.h>
#include <linux/slab.h>
#include <linux/regmap.h>
#include <linux/gpio.h>
#include <linux/interrupt.h>
#include <linux/of_device.h>
#include <dt-bindings/pinctrl/qcom,pmic-gpio.h>
#include "../core.h"
#include "../pinctrl-utils.h"
/* mode */
#define PM8XXX_GPIO_MODE_ENABLED BIT(0)
#define PM8XXX_GPIO_MODE_INPUT 0
#define PM8XXX_GPIO_MODE_OUTPUT 2
/* output buffer */
#define PM8XXX_GPIO_PUSH_PULL 0
#define PM8XXX_GPIO_OPEN_DRAIN 1
/* bias */
#define PM8XXX_GPIO_BIAS_PU_30 0
#define PM8XXX_GPIO_BIAS_PU_1P5 1
#define PM8XXX_GPIO_BIAS_PU_31P5 2
#define PM8XXX_GPIO_BIAS_PU_1P5_30 3
#define PM8XXX_GPIO_BIAS_PD 4
#define PM8XXX_GPIO_BIAS_NP 5
/* GPIO registers */
#define SSBI_REG_ADDR_GPIO_BASE 0x150
#define SSBI_REG_ADDR_GPIO(n) (SSBI_REG_ADDR_GPIO_BASE + n)
#define PM8XXX_BANK_WRITE BIT(7)
#define PM8XXX_MAX_GPIOS 44
/* custom pinconf parameters */
#define PM8XXX_QCOM_DRIVE_STRENGH (PIN_CONFIG_END + 1)
#define PM8XXX_QCOM_PULL_UP_STRENGTH (PIN_CONFIG_END + 2)
/**
* struct pm8xxx_pin_data - dynamic configuration for a pin
* @reg: address of the control register
* @irq: IRQ from the PMIC interrupt controller
* @power_source: logical selected voltage source, mapping in static data
* is used translate to register values
* @mode: operating mode for the pin (input/output)
* @open_drain: output buffer configured as open-drain (vs push-pull)
* @output_value: configured output value
* @bias: register view of configured bias
* @pull_up_strength: placeholder for selected pull up strength
* only used to configure bias when pull up is selected
* @output_strength: selector of output-strength
* @disable: pin disabled / configured as tristate
* @function: pinmux selector
* @inverted: pin logic is inverted
*/
struct pm8xxx_pin_data {
unsigned reg;
int irq;
u8 power_source;
u8 mode;
bool open_drain;
bool output_value;
u8 bias;
u8 pull_up_strength;
u8 output_strength;
bool disable;
u8 function;
bool inverted;
};
struct pm8xxx_gpio {
struct device *dev;
struct regmap *regmap;
struct pinctrl_dev *pctrl;
struct gpio_chip chip;
struct pinctrl_desc desc;
unsigned npins;
};
static const struct pinconf_generic_params pm8xxx_gpio_bindings[] = {
{"qcom,drive-strength", PM8XXX_QCOM_DRIVE_STRENGH, 0},
{"qcom,pull-up-strength", PM8XXX_QCOM_PULL_UP_STRENGTH, 0},
};
#ifdef CONFIG_DEBUG_FS
static const struct pin_config_item pm8xxx_conf_items[ARRAY_SIZE(pm8xxx_gpio_bindings)] = {
PCONFDUMP(PM8XXX_QCOM_DRIVE_STRENGH, "drive-strength", NULL, true),
PCONFDUMP(PM8XXX_QCOM_PULL_UP_STRENGTH, "pull up strength", NULL, true),
};
#endif
static const char * const pm8xxx_groups[PM8XXX_MAX_GPIOS] = {
"gpio1", "gpio2", "gpio3", "gpio4", "gpio5", "gpio6", "gpio7", "gpio8",
"gpio9", "gpio10", "gpio11", "gpio12", "gpio13", "gpio14", "gpio15",
"gpio16", "gpio17", "gpio18", "gpio19", "gpio20", "gpio21", "gpio22",
"gpio23", "gpio24", "gpio25", "gpio26", "gpio27", "gpio28", "gpio29",
"gpio30", "gpio31", "gpio32", "gpio33", "gpio34", "gpio35", "gpio36",
"gpio37", "gpio38", "gpio39", "gpio40", "gpio41", "gpio42", "gpio43",
"gpio44",
};
static const char * const pm8xxx_gpio_functions[] = {
PMIC_GPIO_FUNC_NORMAL, PMIC_GPIO_FUNC_PAIRED,
PMIC_GPIO_FUNC_FUNC1, PMIC_GPIO_FUNC_FUNC2,
PMIC_GPIO_FUNC_DTEST1, PMIC_GPIO_FUNC_DTEST2,
PMIC_GPIO_FUNC_DTEST3, PMIC_GPIO_FUNC_DTEST4,
};
static int pm8xxx_read_bank(struct pm8xxx_gpio *pctrl,
struct pm8xxx_pin_data *pin, int bank)
{
unsigned int val = bank << 4;
int ret;
ret = regmap_write(pctrl->regmap, pin->reg, val);
if (ret) {
dev_err(pctrl->dev, "failed to select bank %d\n", bank);
return ret;
}
ret = regmap_read(pctrl->regmap, pin->reg, &val);
if (ret) {
dev_err(pctrl->dev, "failed to read register %d\n", bank);
return ret;
}
return val;
}
static int pm8xxx_write_bank(struct pm8xxx_gpio *pctrl,
struct pm8xxx_pin_data *pin,
int bank,
u8 val)
{
int ret;
val |= PM8XXX_BANK_WRITE;
val |= bank << 4;
ret = regmap_write(pctrl->regmap, pin->reg, val);
if (ret)
dev_err(pctrl->dev, "failed to write register\n");
return ret;
}
static int pm8xxx_get_groups_count(struct pinctrl_dev *pctldev)
{
struct pm8xxx_gpio *pctrl = pinctrl_dev_get_drvdata(pctldev);
return pctrl->npins;
}
static const char *pm8xxx_get_group_name(struct pinctrl_dev *pctldev,
unsigned group)
{
return pm8xxx_groups[group];
}
static int pm8xxx_get_group_pins(struct pinctrl_dev *pctldev,
unsigned group,
const unsigned **pins,
unsigned *num_pins)
{
struct pm8xxx_gpio *pctrl = pinctrl_dev_get_drvdata(pctldev);
*pins = &pctrl->desc.pins[group].number;
*num_pins = 1;
return 0;
}
static const struct pinctrl_ops pm8xxx_pinctrl_ops = {
.get_groups_count = pm8xxx_get_groups_count,
.get_group_name = pm8xxx_get_group_name,
.get_group_pins = pm8xxx_get_group_pins,
.dt_node_to_map = pinconf_generic_dt_node_to_map_group,
.dt_free_map = pinctrl_utils_dt_free_map,
};
static int pm8xxx_get_functions_count(struct pinctrl_dev *pctldev)
{
return ARRAY_SIZE(pm8xxx_gpio_functions);
}
static const char *pm8xxx_get_function_name(struct pinctrl_dev *pctldev,
unsigned function)
{
return pm8xxx_gpio_functions[function];
}
static int pm8xxx_get_function_groups(struct pinctrl_dev *pctldev,
unsigned function,
const char * const **groups,
unsigned * const num_groups)
{
struct pm8xxx_gpio *pctrl = pinctrl_dev_get_drvdata(pctldev);
*groups = pm8xxx_groups;
*num_groups = pctrl->npins;
return 0;
}
static int pm8xxx_pinmux_set_mux(struct pinctrl_dev *pctldev,
unsigned function,
unsigned group)
{
struct pm8xxx_gpio *pctrl = pinctrl_dev_get_drvdata(pctldev);
struct pm8xxx_pin_data *pin = pctrl->desc.pins[group].drv_data;
u8 val;
pin->function = function;
val = pin->function << 1;
pm8xxx_write_bank(pctrl, pin, 4, val);
return 0;
}
static const struct pinmux_ops pm8xxx_pinmux_ops = {
.get_functions_count = pm8xxx_get_functions_count,
.get_function_name = pm8xxx_get_function_name,
.get_function_groups = pm8xxx_get_function_groups,
.set_mux = pm8xxx_pinmux_set_mux,
};
static int pm8xxx_pin_config_get(struct pinctrl_dev *pctldev,
unsigned int offset,
unsigned long *config)
{
struct pm8xxx_gpio *pctrl = pinctrl_dev_get_drvdata(pctldev);
struct pm8xxx_pin_data *pin = pctrl->desc.pins[offset].drv_data;
unsigned param = pinconf_to_config_param(*config);
unsigned arg;
switch (param) {
case PIN_CONFIG_BIAS_DISABLE:
arg = pin->bias == PM8XXX_GPIO_BIAS_NP;
break;
case PIN_CONFIG_BIAS_PULL_DOWN:
arg = pin->bias == PM8XXX_GPIO_BIAS_PD;
break;
case PIN_CONFIG_BIAS_PULL_UP:
arg = pin->bias <= PM8XXX_GPIO_BIAS_PU_1P5_30;
break;
case PM8XXX_QCOM_PULL_UP_STRENGTH:
arg = pin->pull_up_strength;
break;
case PIN_CONFIG_BIAS_HIGH_IMPEDANCE:
arg = pin->disable;
break;
case PIN_CONFIG_INPUT_ENABLE:
arg = pin->mode == PM8XXX_GPIO_MODE_INPUT;
break;
case PIN_CONFIG_OUTPUT:
if (pin->mode & PM8XXX_GPIO_MODE_OUTPUT)
arg = pin->output_value;
else
arg = 0;
break;
case PIN_CONFIG_POWER_SOURCE:
arg = pin->power_source;
break;
case PM8XXX_QCOM_DRIVE_STRENGH:
arg = pin->output_strength;
break;
case PIN_CONFIG_DRIVE_PUSH_PULL:
arg = !pin->open_drain;
break;
case PIN_CONFIG_DRIVE_OPEN_DRAIN:
arg = pin->open_drain;
break;
default:
return -EINVAL;
}
*config = pinconf_to_config_packed(param, arg);
return 0;
}
static int pm8xxx_pin_config_set(struct pinctrl_dev *pctldev,
unsigned int offset,
unsigned long *configs,
unsigned num_configs)
{
struct pm8xxx_gpio *pctrl = pinctrl_dev_get_drvdata(pctldev);
struct pm8xxx_pin_data *pin = pctrl->desc.pins[offset].drv_data;
unsigned param;
unsigned arg;
unsigned i;
u8 banks = 0;
u8 val;
for (i = 0; i < num_configs; i++) {
param = pinconf_to_config_param(configs[i]);
arg = pinconf_to_config_argument(configs[i]);
switch (param) {
case PIN_CONFIG_BIAS_DISABLE:
pin->bias = PM8XXX_GPIO_BIAS_NP;
banks |= BIT(2);
pin->disable = 0;
banks |= BIT(3);
break;
case PIN_CONFIG_BIAS_PULL_DOWN:
pin->bias = PM8XXX_GPIO_BIAS_PD;
banks |= BIT(2);
pin->disable = 0;
banks |= BIT(3);
break;
case PM8XXX_QCOM_PULL_UP_STRENGTH:
if (arg > PM8XXX_GPIO_BIAS_PU_1P5_30) {
dev_err(pctrl->dev, "invalid pull-up strength\n");
return -EINVAL;
}
pin->pull_up_strength = arg;
/* FALLTHROUGH */
case PIN_CONFIG_BIAS_PULL_UP:
pin->bias = pin->pull_up_strength;
banks |= BIT(2);
pin->disable = 0;
banks |= BIT(3);
break;
case PIN_CONFIG_BIAS_HIGH_IMPEDANCE:
pin->disable = 1;
banks |= BIT(3);
break;
case PIN_CONFIG_INPUT_ENABLE:
pin->mode = PM8XXX_GPIO_MODE_INPUT;
banks |= BIT(0) | BIT(1);
break;
case PIN_CONFIG_OUTPUT:
pin->mode = PM8XXX_GPIO_MODE_OUTPUT;
pin->output_value = !!arg;
banks |= BIT(0) | BIT(1);
break;
case PIN_CONFIG_POWER_SOURCE:
pin->power_source = arg;
banks |= BIT(0);
break;
case PM8XXX_QCOM_DRIVE_STRENGH:
if (arg > PMIC_GPIO_STRENGTH_LOW) {
dev_err(pctrl->dev, "invalid drive strength\n");
return -EINVAL;
}
pin->output_strength = arg;
banks |= BIT(3);
break;
case PIN_CONFIG_DRIVE_PUSH_PULL:
pin->open_drain = 0;
banks |= BIT(1);
break;
case PIN_CONFIG_DRIVE_OPEN_DRAIN:
pin->open_drain = 1;
banks |= BIT(1);
break;
default:
dev_err(pctrl->dev,
"unsupported config parameter: %x\n",
param);
return -EINVAL;
}
}
if (banks & BIT(0)) {
val = pin->power_source << 1;
val |= PM8XXX_GPIO_MODE_ENABLED;
pm8xxx_write_bank(pctrl, pin, 0, val);
}
if (banks & BIT(1)) {
val = pin->mode << 2;
val |= pin->open_drain << 1;
val |= pin->output_value;
pm8xxx_write_bank(pctrl, pin, 1, val);
}
if (banks & BIT(2)) {
val = pin->bias << 1;
pm8xxx_write_bank(pctrl, pin, 2, val);
}
if (banks & BIT(3)) {
val = pin->output_strength << 2;
val |= pin->disable;
pm8xxx_write_bank(pctrl, pin, 3, val);
}
if (banks & BIT(4)) {
val = pin->function << 1;
pm8xxx_write_bank(pctrl, pin, 4, val);
}
if (banks & BIT(5)) {
val = 0;
if (!pin->inverted)
val |= BIT(3);
pm8xxx_write_bank(pctrl, pin, 5, val);
}
return 0;
}
static const struct pinconf_ops pm8xxx_pinconf_ops = {
.is_generic = true,
.pin_config_group_get = pm8xxx_pin_config_get,
.pin_config_group_set = pm8xxx_pin_config_set,
};
static struct pinctrl_desc pm8xxx_pinctrl_desc = {
.name = "pm8xxx_gpio",
.pctlops = &pm8xxx_pinctrl_ops,
.pmxops = &pm8xxx_pinmux_ops,
.confops = &pm8xxx_pinconf_ops,
.owner = THIS_MODULE,
};
static int pm8xxx_gpio_direction_input(struct gpio_chip *chip,
unsigned offset)
{
struct pm8xxx_gpio *pctrl = container_of(chip, struct pm8xxx_gpio, chip);
struct pm8xxx_pin_data *pin = pctrl->desc.pins[offset].drv_data;
u8 val;
pin->mode = PM8XXX_GPIO_MODE_INPUT;
val = pin->mode << 2;
pm8xxx_write_bank(pctrl, pin, 1, val);
return 0;
}
static int pm8xxx_gpio_direction_output(struct gpio_chip *chip,
unsigned offset,
int value)
{
struct pm8xxx_gpio *pctrl = container_of(chip, struct pm8xxx_gpio, chip);
struct pm8xxx_pin_data *pin = pctrl->desc.pins[offset].drv_data;
u8 val;
pin->mode = PM8XXX_GPIO_MODE_OUTPUT;
pin->output_value = !!value;
val = pin->mode << 2;
val |= pin->open_drain << 1;
val |= pin->output_value;
pm8xxx_write_bank(pctrl, pin, 1, val);
return 0;
}
static int pm8xxx_gpio_get(struct gpio_chip *chip, unsigned offset)
{
struct pm8xxx_gpio *pctrl = container_of(chip, struct pm8xxx_gpio, chip);
struct pm8xxx_pin_data *pin = pctrl->desc.pins[offset].drv_data;
bool state;
int ret;
if (pin->mode == PM8XXX_GPIO_MODE_OUTPUT) {
ret = pin->output_value;
} else {
ret = irq_get_irqchip_state(pin->irq, IRQCHIP_STATE_LINE_LEVEL, &state);
if (!ret)
ret = !!state;
}
return ret;
}
static void pm8xxx_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
{
struct pm8xxx_gpio *pctrl = container_of(chip, struct pm8xxx_gpio, chip);
struct pm8xxx_pin_data *pin = pctrl->desc.pins[offset].drv_data;
u8 val;
pin->output_value = !!value;
val = pin->mode << 2;
val |= pin->open_drain << 1;
val |= pin->output_value;
pm8xxx_write_bank(pctrl, pin, 1, val);
}
static int pm8xxx_gpio_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] - 1;
}
static int pm8xxx_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
{
struct pm8xxx_gpio *pctrl = container_of(chip, struct pm8xxx_gpio, chip);
struct pm8xxx_pin_data *pin = pctrl->desc.pins[offset].drv_data;
return pin->irq;
}
#ifdef CONFIG_DEBUG_FS
#include <linux/seq_file.h>
static void pm8xxx_gpio_dbg_show_one(struct seq_file *s,
struct pinctrl_dev *pctldev,
struct gpio_chip *chip,
unsigned offset,
unsigned gpio)
{
struct pm8xxx_gpio *pctrl = container_of(chip, struct pm8xxx_gpio, chip);
struct pm8xxx_pin_data *pin = pctrl->desc.pins[offset].drv_data;
static const char * const modes[] = {
"in", "both", "out", "off"
};
static const char * const biases[] = {
"pull-up 30uA", "pull-up 1.5uA", "pull-up 31.5uA",
"pull-up 1.5uA + 30uA boost", "pull-down 10uA", "no pull"
};
static const char * const buffer_types[] = {
"push-pull", "open-drain"
};
static const char * const strengths[] = {
"no", "high", "medium", "low"
};
seq_printf(s, " gpio%-2d:", offset + 1);
if (pin->disable) {
seq_puts(s, " ---");
} else {
seq_printf(s, " %-4s", modes[pin->mode]);
seq_printf(s, " %-7s", pm8xxx_gpio_functions[pin->function]);
seq_printf(s, " VIN%d", pin->power_source);
seq_printf(s, " %-27s", biases[pin->bias]);
seq_printf(s, " %-10s", buffer_types[pin->open_drain]);
seq_printf(s, " %-4s", pin->output_value ? "high" : "low");
seq_printf(s, " %-7s", strengths[pin->output_strength]);
if (pin->inverted)
seq_puts(s, " inverted");
}
}
static void pm8xxx_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
{
unsigned gpio = chip->base;
unsigned i;
for (i = 0; i < chip->ngpio; i++, gpio++) {
pm8xxx_gpio_dbg_show_one(s, NULL, chip, i, gpio);
seq_puts(s, "\n");
}
}
#else
#define msm_gpio_dbg_show NULL
#endif
static struct gpio_chip pm8xxx_gpio_template = {
.direction_input = pm8xxx_gpio_direction_input,
.direction_output = pm8xxx_gpio_direction_output,
.get = pm8xxx_gpio_get,
.set = pm8xxx_gpio_set,
.of_xlate = pm8xxx_gpio_of_xlate,
.to_irq = pm8xxx_gpio_to_irq,
.dbg_show = pm8xxx_gpio_dbg_show,
.owner = THIS_MODULE,
};
static int pm8xxx_pin_populate(struct pm8xxx_gpio *pctrl,
struct pm8xxx_pin_data *pin)
{
int val;
val = pm8xxx_read_bank(pctrl, pin, 0);
if (val < 0)
return val;
pin->power_source = (val >> 1) & 0x7;
val = pm8xxx_read_bank(pctrl, pin, 1);
if (val < 0)
return val;
pin->mode = (val >> 2) & 0x3;
pin->open_drain = !!(val & BIT(1));
pin->output_value = val & BIT(0);
val = pm8xxx_read_bank(pctrl, pin, 2);
if (val < 0)
return val;
pin->bias = (val >> 1) & 0x7;
if (pin->bias <= PM8XXX_GPIO_BIAS_PU_1P5_30)
pin->pull_up_strength = pin->bias;
else
pin->pull_up_strength = PM8XXX_GPIO_BIAS_PU_30;
val = pm8xxx_read_bank(pctrl, pin, 3);
if (val < 0)
return val;
pin->output_strength = (val >> 2) & 0x3;
pin->disable = val & BIT(0);
val = pm8xxx_read_bank(pctrl, pin, 4);
if (val < 0)
return val;
pin->function = (val >> 1) & 0x7;
val = pm8xxx_read_bank(pctrl, pin, 5);
if (val < 0)
return val;
pin->inverted = !(val & BIT(3));
return 0;
}
static const struct of_device_id pm8xxx_gpio_of_match[] = {
{ .compatible = "qcom,pm8018-gpio", .data = (void *)6 },
{ .compatible = "qcom,pm8038-gpio", .data = (void *)12 },
{ .compatible = "qcom,pm8058-gpio", .data = (void *)40 },
{ .compatible = "qcom,pm8917-gpio", .data = (void *)38 },
{ .compatible = "qcom,pm8921-gpio", .data = (void *)44 },
{ },
};
MODULE_DEVICE_TABLE(of, pm8xxx_gpio_of_match);
static int pm8xxx_gpio_probe(struct platform_device *pdev)
{
struct pm8xxx_pin_data *pin_data;
struct pinctrl_pin_desc *pins;
struct pm8xxx_gpio *pctrl;
int ret;
int i;
pctrl = devm_kzalloc(&pdev->dev, sizeof(*pctrl), GFP_KERNEL);
if (!pctrl)
return -ENOMEM;
pctrl->dev = &pdev->dev;
pctrl->npins = (unsigned)of_device_get_match_data(&pdev->dev);
pctrl->regmap = dev_get_regmap(pdev->dev.parent, NULL);
if (!pctrl->regmap) {
dev_err(&pdev->dev, "parent regmap unavailable\n");
return -ENXIO;
}
pctrl->desc = pm8xxx_pinctrl_desc;
pctrl->desc.npins = pctrl->npins;
pins = devm_kcalloc(&pdev->dev,
pctrl->desc.npins,
sizeof(struct pinctrl_pin_desc),
GFP_KERNEL);
if (!pins)
return -ENOMEM;
pin_data = devm_kcalloc(&pdev->dev,
pctrl->desc.npins,
sizeof(struct pm8xxx_pin_data),
GFP_KERNEL);
if (!pin_data)
return -ENOMEM;
for (i = 0; i < pctrl->desc.npins; i++) {
pin_data[i].reg = SSBI_REG_ADDR_GPIO(i);
pin_data[i].irq = platform_get_irq(pdev, i);
if (pin_data[i].irq < 0) {
dev_err(&pdev->dev,
"missing interrupts for pin %d\n", i);
return pin_data[i].irq;
}
ret = pm8xxx_pin_populate(pctrl, &pin_data[i]);
if (ret)
return ret;
pins[i].number = i;
pins[i].name = pm8xxx_groups[i];
pins[i].drv_data = &pin_data[i];
}
pctrl->desc.pins = pins;
pctrl->desc.num_custom_params = ARRAY_SIZE(pm8xxx_gpio_bindings);
pctrl->desc.custom_params = pm8xxx_gpio_bindings;
#ifdef CONFIG_DEBUG_FS
pctrl->desc.custom_conf_items = pm8xxx_conf_items;
#endif
pctrl->pctrl = pinctrl_register(&pctrl->desc, &pdev->dev, pctrl);
if (!pctrl->pctrl) {
dev_err(&pdev->dev, "couldn't register pm8xxx gpio driver\n");
return -ENODEV;
}
pctrl->chip = pm8xxx_gpio_template;
pctrl->chip.base = -1;
pctrl->chip.dev = &pdev->dev;
pctrl->chip.of_node = pdev->dev.of_node;
pctrl->chip.of_gpio_n_cells = 2;
pctrl->chip.label = dev_name(pctrl->dev);
pctrl->chip.ngpio = pctrl->npins;
ret = gpiochip_add(&pctrl->chip);
if (ret) {
dev_err(&pdev->dev, "failed register gpiochip\n");
goto unregister_pinctrl;
}
ret = gpiochip_add_pin_range(&pctrl->chip,
dev_name(pctrl->dev),
0, 0, pctrl->chip.ngpio);
if (ret) {
dev_err(pctrl->dev, "failed to add pin range\n");
goto unregister_gpiochip;
}
platform_set_drvdata(pdev, pctrl);
dev_dbg(&pdev->dev, "Qualcomm pm8xxx gpio driver probed\n");
return 0;
unregister_gpiochip:
gpiochip_remove(&pctrl->chip);
unregister_pinctrl:
pinctrl_unregister(pctrl->pctrl);
return ret;
}
static int pm8xxx_gpio_remove(struct platform_device *pdev)
{
struct pm8xxx_gpio *pctrl = platform_get_drvdata(pdev);
gpiochip_remove(&pctrl->chip);
pinctrl_unregister(pctrl->pctrl);
return 0;
}
static struct platform_driver pm8xxx_gpio_driver = {
.driver = {
.name = "qcom-ssbi-gpio",
.of_match_table = pm8xxx_gpio_of_match,
},
.probe = pm8xxx_gpio_probe,
.remove = pm8xxx_gpio_remove,
};
module_platform_driver(pm8xxx_gpio_driver);
MODULE_AUTHOR("Bjorn Andersson <bjorn.andersson@sonymobile.com>");
MODULE_DESCRIPTION("Qualcomm PM8xxx GPIO driver");
MODULE_LICENSE("GPL v2");

882
drivers/pinctrl/qcom/pinctrl-ssbi-mpp.c Normal file
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/*
* Copyright (c) 2015, Sony Mobile Communications AB.
* Copyright (c) 2013, 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/module.h>
#include <linux/platform_device.h>
#include <linux/pinctrl/pinctrl.h>
#include <linux/pinctrl/pinmux.h>
#include <linux/pinctrl/pinconf.h>
#include <linux/pinctrl/pinconf-generic.h>
#include <linux/slab.h>
#include <linux/regmap.h>
#include <linux/gpio.h>
#include <linux/interrupt.h>
#include <linux/of_device.h>
#include <dt-bindings/pinctrl/qcom,pmic-mpp.h>
#include "../core.h"
#include "../pinctrl-utils.h"
/* MPP registers */
#define SSBI_REG_ADDR_MPP_BASE 0x50
#define SSBI_REG_ADDR_MPP(n) (SSBI_REG_ADDR_MPP_BASE + n)
/* MPP Type: type */
#define PM8XXX_MPP_TYPE_D_INPUT 0
#define PM8XXX_MPP_TYPE_D_OUTPUT 1
#define PM8XXX_MPP_TYPE_D_BI_DIR 2
#define PM8XXX_MPP_TYPE_A_INPUT 3
#define PM8XXX_MPP_TYPE_A_OUTPUT 4
#define PM8XXX_MPP_TYPE_SINK 5
#define PM8XXX_MPP_TYPE_DTEST_SINK 6
#define PM8XXX_MPP_TYPE_DTEST_OUTPUT 7
/* Digital Input: control */
#define PM8XXX_MPP_DIN_TO_INT 0
#define PM8XXX_MPP_DIN_TO_DBUS1 1
#define PM8XXX_MPP_DIN_TO_DBUS2 2
#define PM8XXX_MPP_DIN_TO_DBUS3 3
/* Digital Output: control */
#define PM8XXX_MPP_DOUT_CTRL_LOW 0
#define PM8XXX_MPP_DOUT_CTRL_HIGH 1
#define PM8XXX_MPP_DOUT_CTRL_MPP 2
#define PM8XXX_MPP_DOUT_CTRL_INV_MPP 3
/* Bidirectional: control */
#define PM8XXX_MPP_BI_PULLUP_1KOHM 0
#define PM8XXX_MPP_BI_PULLUP_OPEN 1
#define PM8XXX_MPP_BI_PULLUP_10KOHM 2
#define PM8XXX_MPP_BI_PULLUP_30KOHM 3
/* Analog Output: control */
#define PM8XXX_MPP_AOUT_CTRL_DISABLE 0
#define PM8XXX_MPP_AOUT_CTRL_ENABLE 1
#define PM8XXX_MPP_AOUT_CTRL_MPP_HIGH_EN 2
#define PM8XXX_MPP_AOUT_CTRL_MPP_LOW_EN 3
/* Current Sink: control */
#define PM8XXX_MPP_CS_CTRL_DISABLE 0
#define PM8XXX_MPP_CS_CTRL_ENABLE 1
#define PM8XXX_MPP_CS_CTRL_MPP_HIGH_EN 2
#define PM8XXX_MPP_CS_CTRL_MPP_LOW_EN 3
/* DTEST Current Sink: control */
#define PM8XXX_MPP_DTEST_CS_CTRL_EN1 0
#define PM8XXX_MPP_DTEST_CS_CTRL_EN2 1
#define PM8XXX_MPP_DTEST_CS_CTRL_EN3 2
#define PM8XXX_MPP_DTEST_CS_CTRL_EN4 3
/* DTEST Digital Output: control */
#define PM8XXX_MPP_DTEST_DBUS1 0
#define PM8XXX_MPP_DTEST_DBUS2 1
#define PM8XXX_MPP_DTEST_DBUS3 2
#define PM8XXX_MPP_DTEST_DBUS4 3
/* custom pinconf parameters */
#define PM8XXX_CONFIG_AMUX (PIN_CONFIG_END + 1)
#define PM8XXX_CONFIG_DTEST_SELECTOR (PIN_CONFIG_END + 2)
#define PM8XXX_CONFIG_ALEVEL (PIN_CONFIG_END + 3)
#define PM8XXX_CONFIG_PAIRED (PIN_CONFIG_END + 4)
/**
* struct pm8xxx_pin_data - dynamic configuration for a pin
* @reg: address of the control register
* @irq: IRQ from the PMIC interrupt controller
* @mode: operating mode for the pin (digital, analog or current sink)
* @input: pin is input
* @output: pin is output
* @high_z: pin is floating
* @paired: mpp operates in paired mode
* @output_value: logical output value of the mpp
* @power_source: selected power source
* @dtest: DTEST route selector
* @amux: input muxing in analog mode
* @aout_level: selector of the output in analog mode
* @drive_strength: drive strength of the current sink
* @pullup: pull up value, when in digital bidirectional mode
*/
struct pm8xxx_pin_data {
unsigned reg;
int irq;
u8 mode;
bool input;
bool output;
bool high_z;
bool paired;
bool output_value;
u8 power_source;
u8 dtest;
u8 amux;
u8 aout_level;
u8 drive_strength;
unsigned pullup;
};
struct pm8xxx_mpp {
struct device *dev;
struct regmap *regmap;
struct pinctrl_dev *pctrl;
struct gpio_chip chip;
struct pinctrl_desc desc;
unsigned npins;
};
static const struct pinconf_generic_params pm8xxx_mpp_bindings[] = {
{"qcom,amux-route", PM8XXX_CONFIG_AMUX, 0},
{"qcom,analog-level", PM8XXX_CONFIG_ALEVEL, 0},
{"qcom,dtest", PM8XXX_CONFIG_DTEST_SELECTOR, 0},
{"qcom,paired", PM8XXX_CONFIG_PAIRED, 0},
};
#ifdef CONFIG_DEBUG_FS
static const struct pin_config_item pm8xxx_conf_items[] = {
PCONFDUMP(PM8XXX_CONFIG_AMUX, "analog mux", NULL, true),
PCONFDUMP(PM8XXX_CONFIG_ALEVEL, "analog level", NULL, true),
PCONFDUMP(PM8XXX_CONFIG_DTEST_SELECTOR, "dtest", NULL, true),
PCONFDUMP(PM8XXX_CONFIG_PAIRED, "paired", NULL, false),
};
#endif
#define PM8XXX_MAX_MPPS 12
static const char * const pm8xxx_groups[PM8XXX_MAX_MPPS] = {
"mpp1", "mpp2", "mpp3", "mpp4", "mpp5", "mpp6", "mpp7", "mpp8",
"mpp9", "mpp10", "mpp11", "mpp12",
};
#define PM8XXX_MPP_DIGITAL 0
#define PM8XXX_MPP_ANALOG 1
#define PM8XXX_MPP_SINK 2
static const char * const pm8xxx_mpp_functions[] = {
"digital", "analog", "sink",
};
static int pm8xxx_mpp_update(struct pm8xxx_mpp *pctrl,
struct pm8xxx_pin_data *pin)
{
unsigned level;
unsigned ctrl;
unsigned type;
int ret;
u8 val;
switch (pin->mode) {
case PM8XXX_MPP_DIGITAL:
if (pin->dtest) {
type = PM8XXX_MPP_TYPE_DTEST_OUTPUT;
ctrl = pin->dtest - 1;
} else if (pin->input && pin->output) {
type = PM8XXX_MPP_TYPE_D_BI_DIR;
if (pin->high_z)
ctrl = PM8XXX_MPP_BI_PULLUP_OPEN;
else if (pin->pullup == 600)
ctrl = PM8XXX_MPP_BI_PULLUP_1KOHM;
else if (pin->pullup == 10000)
ctrl = PM8XXX_MPP_BI_PULLUP_10KOHM;
else
ctrl = PM8XXX_MPP_BI_PULLUP_30KOHM;
} else if (pin->input) {
type = PM8XXX_MPP_TYPE_D_INPUT;
if (pin->dtest)
ctrl = pin->dtest;
else
ctrl = PM8XXX_MPP_DIN_TO_INT;
} else {
type = PM8XXX_MPP_TYPE_D_OUTPUT;
ctrl = !!pin->output_value;
if (pin->paired)
ctrl |= BIT(1);
}
level = pin->power_source;
break;
case PM8XXX_MPP_ANALOG:
if (pin->output) {
type = PM8XXX_MPP_TYPE_A_OUTPUT;
level = pin->aout_level;
ctrl = pin->output_value;
if (pin->paired)
ctrl |= BIT(1);
} else {
type = PM8XXX_MPP_TYPE_A_INPUT;
level = pin->amux;
ctrl = 0;
}
break;
case PM8XXX_MPP_SINK:
level = (pin->drive_strength / 5) - 1;
if (pin->dtest) {
type = PM8XXX_MPP_TYPE_DTEST_SINK;
ctrl = pin->dtest - 1;
} else {
type = PM8XXX_MPP_TYPE_SINK;
ctrl = pin->output_value;
if (pin->paired)
ctrl |= BIT(1);
}
break;
default:
return -EINVAL;
}
val = type << 5 | level << 2 | ctrl;
ret = regmap_write(pctrl->regmap, pin->reg, val);
if (ret)
dev_err(pctrl->dev, "failed to write register\n");
return ret;
}
static int pm8xxx_get_groups_count(struct pinctrl_dev *pctldev)
{
struct pm8xxx_mpp *pctrl = pinctrl_dev_get_drvdata(pctldev);
return pctrl->npins;
}
static const char *pm8xxx_get_group_name(struct pinctrl_dev *pctldev,
unsigned group)
{
return pm8xxx_groups[group];
}
static int pm8xxx_get_group_pins(struct pinctrl_dev *pctldev,
unsigned group,
const unsigned **pins,
unsigned *num_pins)
{
struct pm8xxx_mpp *pctrl = pinctrl_dev_get_drvdata(pctldev);
*pins = &pctrl->desc.pins[group].number;
*num_pins = 1;
return 0;
}
static const struct pinctrl_ops pm8xxx_pinctrl_ops = {
.get_groups_count = pm8xxx_get_groups_count,
.get_group_name = pm8xxx_get_group_name,
.get_group_pins = pm8xxx_get_group_pins,
.dt_node_to_map = pinconf_generic_dt_node_to_map_group,
.dt_free_map = pinctrl_utils_dt_free_map,
};
static int pm8xxx_get_functions_count(struct pinctrl_dev *pctldev)
{
return ARRAY_SIZE(pm8xxx_mpp_functions);
}
static const char *pm8xxx_get_function_name(struct pinctrl_dev *pctldev,
unsigned function)
{
return pm8xxx_mpp_functions[function];
}
static int pm8xxx_get_function_groups(struct pinctrl_dev *pctldev,
unsigned function,
const char * const **groups,
unsigned * const num_groups)
{
struct pm8xxx_mpp *pctrl = pinctrl_dev_get_drvdata(pctldev);
*groups = pm8xxx_groups;
*num_groups = pctrl->npins;
return 0;
}
static int pm8xxx_pinmux_set_mux(struct pinctrl_dev *pctldev,
unsigned function,
unsigned group)
{
struct pm8xxx_mpp *pctrl = pinctrl_dev_get_drvdata(pctldev);
struct pm8xxx_pin_data *pin = pctrl->desc.pins[group].drv_data;
pin->mode = function;
pm8xxx_mpp_update(pctrl, pin);
return 0;
}
static const struct pinmux_ops pm8xxx_pinmux_ops = {
.get_functions_count = pm8xxx_get_functions_count,
.get_function_name = pm8xxx_get_function_name,
.get_function_groups = pm8xxx_get_function_groups,
.set_mux = pm8xxx_pinmux_set_mux,
};
static int pm8xxx_pin_config_get(struct pinctrl_dev *pctldev,
unsigned int offset,
unsigned long *config)
{
struct pm8xxx_mpp *pctrl = pinctrl_dev_get_drvdata(pctldev);
struct pm8xxx_pin_data *pin = pctrl->desc.pins[offset].drv_data;
unsigned param = pinconf_to_config_param(*config);
unsigned arg;
switch (param) {
case PIN_CONFIG_BIAS_PULL_UP:
arg = pin->pullup;
break;
case PIN_CONFIG_BIAS_HIGH_IMPEDANCE:
arg = pin->high_z;
break;
case PIN_CONFIG_INPUT_ENABLE:
arg = pin->input;
break;
case PIN_CONFIG_OUTPUT:
arg = pin->output_value;
break;
case PIN_CONFIG_POWER_SOURCE:
arg = pin->power_source;
break;
case PIN_CONFIG_DRIVE_STRENGTH:
arg = pin->drive_strength;
break;
case PM8XXX_CONFIG_DTEST_SELECTOR:
arg = pin->dtest;
break;
case PM8XXX_CONFIG_AMUX:
arg = pin->amux;
break;
case PM8XXX_CONFIG_ALEVEL:
arg = pin->aout_level;
break;
case PM8XXX_CONFIG_PAIRED:
arg = pin->paired;
break;
default:
return -EINVAL;
}
*config = pinconf_to_config_packed(param, arg);
return 0;
}
static int pm8xxx_pin_config_set(struct pinctrl_dev *pctldev,
unsigned int offset,
unsigned long *configs,
unsigned num_configs)
{
struct pm8xxx_mpp *pctrl = pinctrl_dev_get_drvdata(pctldev);
struct pm8xxx_pin_data *pin = pctrl->desc.pins[offset].drv_data;
unsigned param;
unsigned arg;
unsigned i;
for (i = 0; i < num_configs; i++) {
param = pinconf_to_config_param(configs[i]);
arg = pinconf_to_config_argument(configs[i]);
switch (param) {
case PIN_CONFIG_BIAS_PULL_UP:
pin->pullup = arg;
break;
case PIN_CONFIG_BIAS_HIGH_IMPEDANCE:
pin->high_z = true;
break;
case PIN_CONFIG_INPUT_ENABLE:
pin->input = true;
break;
case PIN_CONFIG_OUTPUT:
pin->output = true;
pin->output_value = !!arg;
break;
case PIN_CONFIG_POWER_SOURCE:
pin->power_source = arg;
break;
case PIN_CONFIG_DRIVE_STRENGTH:
pin->drive_strength = arg;
break;
case PM8XXX_CONFIG_DTEST_SELECTOR:
pin->dtest = arg;
break;
case PM8XXX_CONFIG_AMUX:
pin->amux = arg;
break;
case PM8XXX_CONFIG_ALEVEL:
pin->aout_level = arg;
break;
case PM8XXX_CONFIG_PAIRED:
pin->paired = !!arg;
break;
default:
dev_err(pctrl->dev,
"unsupported config parameter: %x\n",
param);
return -EINVAL;
}
}
pm8xxx_mpp_update(pctrl, pin);
return 0;
}
static const struct pinconf_ops pm8xxx_pinconf_ops = {
.is_generic = true,
.pin_config_group_get = pm8xxx_pin_config_get,
.pin_config_group_set = pm8xxx_pin_config_set,
};
static struct pinctrl_desc pm8xxx_pinctrl_desc = {
.name = "pm8xxx_mpp",
.pctlops = &pm8xxx_pinctrl_ops,
.pmxops = &pm8xxx_pinmux_ops,
.confops = &pm8xxx_pinconf_ops,
.owner = THIS_MODULE,
};
static int pm8xxx_mpp_direction_input(struct gpio_chip *chip,
unsigned offset)
{
struct pm8xxx_mpp *pctrl = container_of(chip, struct pm8xxx_mpp, chip);
struct pm8xxx_pin_data *pin = pctrl->desc.pins[offset].drv_data;
switch (pin->mode) {
case PM8XXX_MPP_DIGITAL:
pin->input = true;
break;
case PM8XXX_MPP_ANALOG:
pin->input = true;
pin->output = true;
break;
case PM8XXX_MPP_SINK:
return -EINVAL;
}
pm8xxx_mpp_update(pctrl, pin);
return 0;
}
static int pm8xxx_mpp_direction_output(struct gpio_chip *chip,
unsigned offset,
int value)
{
struct pm8xxx_mpp *pctrl = container_of(chip, struct pm8xxx_mpp, chip);
struct pm8xxx_pin_data *pin = pctrl->desc.pins[offset].drv_data;
switch (pin->mode) {
case PM8XXX_MPP_DIGITAL:
pin->output = true;
break;
case PM8XXX_MPP_ANALOG:
pin->input = false;
pin->output = true;
break;
case PM8XXX_MPP_SINK:
pin->input = false;
pin->output = true;
break;
}
pm8xxx_mpp_update(pctrl, pin);
return 0;
}
static int pm8xxx_mpp_get(struct gpio_chip *chip, unsigned offset)
{
struct pm8xxx_mpp *pctrl = container_of(chip, struct pm8xxx_mpp, chip);
struct pm8xxx_pin_data *pin = pctrl->desc.pins[offset].drv_data;
bool state;
int ret;
if (!pin->input)
return pin->output_value;
ret = irq_get_irqchip_state(pin->irq, IRQCHIP_STATE_LINE_LEVEL, &state);
if (!ret)
ret = !!state;
return ret;
}
static void pm8xxx_mpp_set(struct gpio_chip *chip, unsigned offset, int value)
{
struct pm8xxx_mpp *pctrl = container_of(chip, struct pm8xxx_mpp, chip);
struct pm8xxx_pin_data *pin = pctrl->desc.pins[offset].drv_data;
pin->output_value = !!value;
pm8xxx_mpp_update(pctrl, pin);
}
static int pm8xxx_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] - 1;
}
static int pm8xxx_mpp_to_irq(struct gpio_chip *chip, unsigned offset)
{
struct pm8xxx_mpp *pctrl = container_of(chip, struct pm8xxx_mpp, chip);
struct pm8xxx_pin_data *pin = pctrl->desc.pins[offset].drv_data;
return pin->irq;
}
#ifdef CONFIG_DEBUG_FS
#include <linux/seq_file.h>
static void pm8xxx_mpp_dbg_show_one(struct seq_file *s,
struct pinctrl_dev *pctldev,
struct gpio_chip *chip,
unsigned offset,
unsigned gpio)
{
struct pm8xxx_mpp *pctrl = container_of(chip, struct pm8xxx_mpp, chip);
struct pm8xxx_pin_data *pin = pctrl->desc.pins[offset].drv_data;
static const char * const aout_lvls[] = {
"1v25", "1v25_2", "0v625", "0v3125", "mpp", "abus1", "abus2",
"abus3"
};
static const char * const amuxs[] = {
"amux5", "amux6", "amux7", "amux8", "amux9", "abus1", "abus2",
"abus3",
};
seq_printf(s, " mpp%-2d:", offset + 1);
switch (pin->mode) {
case PM8XXX_MPP_DIGITAL:
seq_puts(s, " digital ");
if (pin->dtest) {
seq_printf(s, "dtest%d\n", pin->dtest);
} else if (pin->input && pin->output) {
if (pin->high_z)
seq_puts(s, "bi-dir high-z");
else
seq_printf(s, "bi-dir %dOhm", pin->pullup);
} else if (pin->input) {
if (pin->dtest)
seq_printf(s, "in dtest%d", pin->dtest);
else
seq_puts(s, "in gpio");
} else if (pin->output) {
seq_puts(s, "out ");
if (!pin->paired) {
seq_puts(s, pin->output_value ?
"high" : "low");
} else {
seq_puts(s, pin->output_value ?
"inverted" : "follow");
}
}
break;
case PM8XXX_MPP_ANALOG:
seq_puts(s, " analog ");
if (pin->output) {
seq_printf(s, "out %s ", aout_lvls[pin->aout_level]);
if (!pin->paired) {
seq_puts(s, pin->output_value ?
"high" : "low");
} else {
seq_puts(s, pin->output_value ?
"inverted" : "follow");
}
} else {
seq_printf(s, "input mux %s", amuxs[pin->amux]);
}
break;
case PM8XXX_MPP_SINK:
seq_printf(s, " sink %dmA ", pin->drive_strength);
if (pin->dtest) {
seq_printf(s, "dtest%d", pin->dtest);
} else {
if (!pin->paired) {
seq_puts(s, pin->output_value ?
"high" : "low");
} else {
seq_puts(s, pin->output_value ?
"inverted" : "follow");
}
}
break;
}
}
static void pm8xxx_mpp_dbg_show(struct seq_file *s, struct gpio_chip *chip)
{
unsigned gpio = chip->base;
unsigned i;
for (i = 0; i < chip->ngpio; i++, gpio++) {
pm8xxx_mpp_dbg_show_one(s, NULL, chip, i, gpio);
seq_puts(s, "\n");
}
}
#else
#define msm_mpp_dbg_show NULL
#endif
static struct gpio_chip pm8xxx_mpp_template = {
.direction_input = pm8xxx_mpp_direction_input,
.direction_output = pm8xxx_mpp_direction_output,
.get = pm8xxx_mpp_get,
.set = pm8xxx_mpp_set,
.of_xlate = pm8xxx_mpp_of_xlate,
.to_irq = pm8xxx_mpp_to_irq,
.dbg_show = pm8xxx_mpp_dbg_show,
.owner = THIS_MODULE,
};
static int pm8xxx_pin_populate(struct pm8xxx_mpp *pctrl,
struct pm8xxx_pin_data *pin)
{
unsigned int val;
unsigned level;
unsigned ctrl;
unsigned type;
int ret;
ret = regmap_read(pctrl->regmap, pin->reg, &val);
if (ret) {
dev_err(pctrl->dev, "failed to read register\n");
return ret;
}
type = (val >> 5) & 7;
level = (val >> 2) & 7;
ctrl = (val) & 3;
switch (type) {
case PM8XXX_MPP_TYPE_D_INPUT:
pin->mode = PM8XXX_MPP_DIGITAL;
pin->input = true;
pin->power_source = level;
pin->dtest = ctrl;
break;
case PM8XXX_MPP_TYPE_D_OUTPUT:
pin->mode = PM8XXX_MPP_DIGITAL;
pin->output = true;
pin->power_source = level;
pin->output_value = !!(ctrl & BIT(0));
pin->paired = !!(ctrl & BIT(1));
break;
case PM8XXX_MPP_TYPE_D_BI_DIR:
pin->mode = PM8XXX_MPP_DIGITAL;
pin->input = true;
pin->output = true;
pin->power_source = level;
switch (ctrl) {
case PM8XXX_MPP_BI_PULLUP_1KOHM:
pin->pullup = 600;
break;
case PM8XXX_MPP_BI_PULLUP_OPEN:
pin->high_z = true;
break;
case PM8XXX_MPP_BI_PULLUP_10KOHM:
pin->pullup = 10000;
break;
case PM8XXX_MPP_BI_PULLUP_30KOHM:
pin->pullup = 30000;
break;
}
break;
case PM8XXX_MPP_TYPE_A_INPUT:
pin->mode = PM8XXX_MPP_ANALOG;
pin->input = true;
pin->amux = level;
break;
case PM8XXX_MPP_TYPE_A_OUTPUT:
pin->mode = PM8XXX_MPP_ANALOG;
pin->output = true;
pin->aout_level = level;
pin->output_value = !!(ctrl & BIT(0));
pin->paired = !!(ctrl & BIT(1));
break;
case PM8XXX_MPP_TYPE_SINK:
pin->mode = PM8XXX_MPP_SINK;
pin->drive_strength = 5 * (level + 1);
pin->output_value = !!(ctrl & BIT(0));
pin->paired = !!(ctrl & BIT(1));
break;
case PM8XXX_MPP_TYPE_DTEST_SINK:
pin->mode = PM8XXX_MPP_SINK;
pin->dtest = ctrl + 1;
pin->drive_strength = 5 * (level + 1);
break;
case PM8XXX_MPP_TYPE_DTEST_OUTPUT:
pin->mode = PM8XXX_MPP_DIGITAL;
pin->power_source = level;
if (ctrl >= 1)
pin->dtest = ctrl;
break;
}
return 0;
}
static const struct of_device_id pm8xxx_mpp_of_match[] = {
{ .compatible = "qcom,pm8018-mpp", .data = (void *)6 },
{ .compatible = "qcom,pm8038-mpp", .data = (void *)6 },
{ .compatible = "qcom,pm8917-mpp", .data = (void *)10 },
{ .compatible = "qcom,pm8821-mpp", .data = (void *)4 },
{ .compatible = "qcom,pm8921-mpp", .data = (void *)12 },
{ },
};
MODULE_DEVICE_TABLE(of, pm8xxx_mpp_of_match);
static int pm8xxx_mpp_probe(struct platform_device *pdev)
{
struct pm8xxx_pin_data *pin_data;
struct pinctrl_pin_desc *pins;
struct pm8xxx_mpp *pctrl;
int ret;
int i;
pctrl = devm_kzalloc(&pdev->dev, sizeof(*pctrl), GFP_KERNEL);
if (!pctrl)
return -ENOMEM;
pctrl->dev = &pdev->dev;
pctrl->npins = (unsigned)of_device_get_match_data(&pdev->dev);
pctrl->regmap = dev_get_regmap(pdev->dev.parent, NULL);
if (!pctrl->regmap) {
dev_err(&pdev->dev, "parent regmap unavailable\n");
return -ENXIO;
}
pctrl->desc = pm8xxx_pinctrl_desc;
pctrl->desc.npins = pctrl->npins;
pins = devm_kcalloc(&pdev->dev,
pctrl->desc.npins,
sizeof(struct pinctrl_pin_desc),
GFP_KERNEL);
if (!pins)
return -ENOMEM;
pin_data = devm_kcalloc(&pdev->dev,
pctrl->desc.npins,
sizeof(struct pm8xxx_pin_data),
GFP_KERNEL);
if (!pin_data)
return -ENOMEM;
for (i = 0; i < pctrl->desc.npins; i++) {
pin_data[i].reg = SSBI_REG_ADDR_MPP(i);
pin_data[i].irq = platform_get_irq(pdev, i);
if (pin_data[i].irq < 0) {
dev_err(&pdev->dev,
"missing interrupts for pin %d\n", i);
return pin_data[i].irq;
}
ret = pm8xxx_pin_populate(pctrl, &pin_data[i]);
if (ret)
return ret;
pins[i].number = i;
pins[i].name = pm8xxx_groups[i];
pins[i].drv_data = &pin_data[i];
}
pctrl->desc.pins = pins;
pctrl->desc.num_custom_params = ARRAY_SIZE(pm8xxx_mpp_bindings);
pctrl->desc.custom_params = pm8xxx_mpp_bindings;
#ifdef CONFIG_DEBUG_FS
pctrl->desc.custom_conf_items = pm8xxx_conf_items;
#endif
pctrl->pctrl = pinctrl_register(&pctrl->desc, &pdev->dev, pctrl);
if (!pctrl->pctrl) {
dev_err(&pdev->dev, "couldn't register pm8xxx mpp driver\n");
return -ENODEV;
}
pctrl->chip = pm8xxx_mpp_template;
pctrl->chip.base = -1;
pctrl->chip.dev = &pdev->dev;
pctrl->chip.of_node = pdev->dev.of_node;
pctrl->chip.of_gpio_n_cells = 2;
pctrl->chip.label = dev_name(pctrl->dev);
pctrl->chip.ngpio = pctrl->npins;
ret = gpiochip_add(&pctrl->chip);
if (ret) {
dev_err(&pdev->dev, "failed register gpiochip\n");
goto unregister_pinctrl;
}
ret = gpiochip_add_pin_range(&pctrl->chip,
dev_name(pctrl->dev),
0, 0, pctrl->chip.ngpio);
if (ret) {
dev_err(pctrl->dev, "failed to add pin range\n");
goto unregister_gpiochip;
}
platform_set_drvdata(pdev, pctrl);
dev_dbg(&pdev->dev, "Qualcomm pm8xxx mpp driver probed\n");
return 0;
unregister_gpiochip:
gpiochip_remove(&pctrl->chip);
unregister_pinctrl:
pinctrl_unregister(pctrl->pctrl);
return ret;
}
static int pm8xxx_mpp_remove(struct platform_device *pdev)
{
struct pm8xxx_mpp *pctrl = platform_get_drvdata(pdev);
gpiochip_remove(&pctrl->chip);
pinctrl_unregister(pctrl->pctrl);
return 0;
}
static struct platform_driver pm8xxx_mpp_driver = {
.driver = {
.name = "qcom-ssbi-mpp",
.of_match_table = pm8xxx_mpp_of_match,
},
.probe = pm8xxx_mpp_probe,
.remove = pm8xxx_mpp_remove,
};
module_platform_driver(pm8xxx_mpp_driver);
MODULE_AUTHOR("Bjorn Andersson <bjorn.andersson@sonymobile.com>");
MODULE_DESCRIPTION("Qualcomm PM8xxx MPP driver");
MODULE_LICENSE("GPL v2");

51
include/dt-bindings/pinctrl/qcom,pmic-mpp.h
View File

@ -7,6 +7,47 @@
#define _DT_BINDINGS_PINCTRL_QCOM_PMIC_MPP_H
/* power-source */
/* Digital Input/Output: level [PM8058] */
#define PM8058_MPP_VPH 0
#define PM8058_MPP_S3 1
#define PM8058_MPP_L2 2
#define PM8058_MPP_L3 3
/* Digital Input/Output: level [PM8901] */
#define PM8901_MPP_MSMIO 0
#define PM8901_MPP_DIG 1
#define PM8901_MPP_L5 2
#define PM8901_MPP_S4 3
#define PM8901_MPP_VPH 4
/* Digital Input/Output: level [PM8921] */
#define PM8921_MPP_S4 1
#define PM8921_MPP_L15 3
#define PM8921_MPP_L17 4
#define PM8921_MPP_VPH 7
/* Digital Input/Output: level [PM8821] */
#define PM8821_MPP_1P8 0
#define PM8821_MPP_VPH 7
/* Digital Input/Output: level [PM8018] */
#define PM8018_MPP_L4 0
#define PM8018_MPP_L14 1
#define PM8018_MPP_S3 2
#define PM8018_MPP_L6 3
#define PM8018_MPP_L2 4
#define PM8018_MPP_L5 5
#define PM8018_MPP_VPH 7
/* Digital Input/Output: level [PM8038] */
#define PM8038_MPP_L20 0
#define PM8038_MPP_L11 1
#define PM8038_MPP_L5 2
#define PM8038_MPP_L15 3
#define PM8038_MPP_L17 4
#define PM8038_MPP_VPH 7
#define PM8841_MPP_VPH 0
#define PM8841_MPP_S3 2
@ -37,6 +78,16 @@
#define PMIC_MPP_AMUX_ROUTE_ABUS3 6
#define PMIC_MPP_AMUX_ROUTE_ABUS4 7
/* Analog Output: level */
#define PMIC_MPP_AOUT_LVL_1V25 0
#define PMIC_MPP_AOUT_LVL_1V25_2 1
#define PMIC_MPP_AOUT_LVL_0V625 2
#define PMIC_MPP_AOUT_LVL_0V3125 3
#define PMIC_MPP_AOUT_LVL_MPP 4
#define PMIC_MPP_AOUT_LVL_ABUS1 5
#define PMIC_MPP_AOUT_LVL_ABUS2 6
#define PMIC_MPP_AOUT_LVL_ABUS3 7
/* To be used with "function" */
#define PMIC_MPP_FUNC_NORMAL "normal"
#define PMIC_MPP_FUNC_PAIRED "paired"