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OpenCloudOS-Kernel/drivers/pinctrl/pinctrl-ocelot.c

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// SPDX-License-Identifier: (GPL-2.0 OR MIT)
/*
* Microsemi SoCs pinctrl driver
*
* Author: <alexandre.belloni@free-electrons.com>
* License: Dual MIT/GPL
* Copyright (c) 2017 Microsemi Corporation
*/
#include <linux/gpio/driver.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/of_device.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <linux/pinctrl/pinctrl.h>
#include <linux/pinctrl/pinmux.h>
#include <linux/pinctrl/pinconf.h>
#include <linux/pinctrl/pinconf-generic.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include "core.h"
#include "pinconf.h"
#include "pinmux.h"
#define OCELOT_GPIO_OUT_SET 0x0
#define OCELOT_GPIO_OUT_CLR 0x4
#define OCELOT_GPIO_OUT 0x8
#define OCELOT_GPIO_IN 0xc
#define OCELOT_GPIO_OE 0x10
#define OCELOT_GPIO_INTR 0x14
#define OCELOT_GPIO_INTR_ENA 0x18
#define OCELOT_GPIO_INTR_IDENT 0x1c
#define OCELOT_GPIO_ALT0 0x20
#define OCELOT_GPIO_ALT1 0x24
#define OCELOT_GPIO_SD_MAP 0x28
#define OCELOT_FUNC_PER_PIN 4
enum {
FUNC_NONE,
FUNC_GPIO,
FUNC_IRQ0_IN,
FUNC_IRQ0_OUT,
FUNC_IRQ1_IN,
FUNC_IRQ1_OUT,
FUNC_MIIM1,
FUNC_MIIM2,
FUNC_PCI_WAKE,
FUNC_PTP0,
FUNC_PTP1,
FUNC_PTP2,
FUNC_PTP3,
FUNC_PWM,
FUNC_RECO_CLK0,
FUNC_RECO_CLK1,
FUNC_SFP0,
FUNC_SFP1,
FUNC_SFP2,
FUNC_SFP3,
FUNC_SFP4,
FUNC_SFP5,
FUNC_SFP6,
FUNC_SFP7,
FUNC_SFP8,
FUNC_SFP9,
FUNC_SFP10,
FUNC_SFP11,
FUNC_SFP12,
FUNC_SFP13,
FUNC_SFP14,
FUNC_SFP15,
FUNC_SG0,
FUNC_SG1,
FUNC_SG2,
FUNC_SI,
FUNC_TACHO,
FUNC_TWI,
FUNC_TWI2,
FUNC_TWI_SCL_M,
FUNC_UART,
FUNC_UART2,
FUNC_MAX
};
static const char *const ocelot_function_names[] = {
[FUNC_NONE] = "none",
[FUNC_GPIO] = "gpio",
[FUNC_IRQ0_IN] = "irq0_in",
[FUNC_IRQ0_OUT] = "irq0_out",
[FUNC_IRQ1_IN] = "irq1_in",
[FUNC_IRQ1_OUT] = "irq1_out",
[FUNC_MIIM1] = "miim1",
[FUNC_MIIM2] = "miim2",
[FUNC_PCI_WAKE] = "pci_wake",
[FUNC_PTP0] = "ptp0",
[FUNC_PTP1] = "ptp1",
[FUNC_PTP2] = "ptp2",
[FUNC_PTP3] = "ptp3",
[FUNC_PWM] = "pwm",
[FUNC_RECO_CLK0] = "reco_clk0",
[FUNC_RECO_CLK1] = "reco_clk1",
[FUNC_SFP0] = "sfp0",
[FUNC_SFP1] = "sfp1",
[FUNC_SFP2] = "sfp2",
[FUNC_SFP3] = "sfp3",
[FUNC_SFP4] = "sfp4",
[FUNC_SFP5] = "sfp5",
[FUNC_SFP6] = "sfp6",
[FUNC_SFP7] = "sfp7",
[FUNC_SFP8] = "sfp8",
[FUNC_SFP9] = "sfp9",
[FUNC_SFP10] = "sfp10",
[FUNC_SFP11] = "sfp11",
[FUNC_SFP12] = "sfp12",
[FUNC_SFP13] = "sfp13",
[FUNC_SFP14] = "sfp14",
[FUNC_SFP15] = "sfp15",
[FUNC_SG0] = "sg0",
[FUNC_SG1] = "sg1",
[FUNC_SG2] = "sg2",
[FUNC_SI] = "si",
[FUNC_TACHO] = "tacho",
[FUNC_TWI] = "twi",
[FUNC_TWI2] = "twi2",
[FUNC_TWI_SCL_M] = "twi_scl_m",
[FUNC_UART] = "uart",
[FUNC_UART2] = "uart2",
};
struct ocelot_pmx_func {
const char **groups;
unsigned int ngroups;
};
struct ocelot_pin_caps {
unsigned int pin;
unsigned char functions[OCELOT_FUNC_PER_PIN];
};
struct ocelot_pinctrl {
struct device *dev;
struct pinctrl_dev *pctl;
struct gpio_chip gpio_chip;
struct regmap *map;
struct pinctrl_desc *desc;
struct ocelot_pmx_func func[FUNC_MAX];
u8 stride;
};
#define OCELOT_P(p, f0, f1, f2) \
static struct ocelot_pin_caps ocelot_pin_##p = { \
.pin = p, \
.functions = { \
FUNC_GPIO, FUNC_##f0, FUNC_##f1, FUNC_##f2, \
}, \
}
OCELOT_P(0, SG0, NONE, NONE);
OCELOT_P(1, SG0, NONE, NONE);
OCELOT_P(2, SG0, NONE, NONE);
OCELOT_P(3, SG0, NONE, NONE);
OCELOT_P(4, IRQ0_IN, IRQ0_OUT, TWI_SCL_M);
OCELOT_P(5, IRQ1_IN, IRQ1_OUT, PCI_WAKE);
OCELOT_P(6, UART, TWI_SCL_M, NONE);
OCELOT_P(7, UART, TWI_SCL_M, NONE);
OCELOT_P(8, SI, TWI_SCL_M, IRQ0_OUT);
OCELOT_P(9, SI, TWI_SCL_M, IRQ1_OUT);
OCELOT_P(10, PTP2, TWI_SCL_M, SFP0);
OCELOT_P(11, PTP3, TWI_SCL_M, SFP1);
OCELOT_P(12, UART2, TWI_SCL_M, SFP2);
OCELOT_P(13, UART2, TWI_SCL_M, SFP3);
OCELOT_P(14, MIIM1, TWI_SCL_M, SFP4);
OCELOT_P(15, MIIM1, TWI_SCL_M, SFP5);
OCELOT_P(16, TWI, NONE, SI);
OCELOT_P(17, TWI, TWI_SCL_M, SI);
OCELOT_P(18, PTP0, TWI_SCL_M, NONE);
OCELOT_P(19, PTP1, TWI_SCL_M, NONE);
OCELOT_P(20, RECO_CLK0, TACHO, NONE);
OCELOT_P(21, RECO_CLK1, PWM, NONE);
#define OCELOT_PIN(n) { \
.number = n, \
.name = "GPIO_"#n, \
.drv_data = &ocelot_pin_##n \
}
static const struct pinctrl_pin_desc ocelot_pins[] = {
OCELOT_PIN(0),
OCELOT_PIN(1),
OCELOT_PIN(2),
OCELOT_PIN(3),
OCELOT_PIN(4),
OCELOT_PIN(5),
OCELOT_PIN(6),
OCELOT_PIN(7),
OCELOT_PIN(8),
OCELOT_PIN(9),
OCELOT_PIN(10),
OCELOT_PIN(11),
OCELOT_PIN(12),
OCELOT_PIN(13),
OCELOT_PIN(14),
OCELOT_PIN(15),
OCELOT_PIN(16),
OCELOT_PIN(17),
OCELOT_PIN(18),
OCELOT_PIN(19),
OCELOT_PIN(20),
OCELOT_PIN(21),
};
#define JAGUAR2_P(p, f0, f1) \
static struct ocelot_pin_caps jaguar2_pin_##p = { \
.pin = p, \
.functions = { \
FUNC_GPIO, FUNC_##f0, FUNC_##f1, FUNC_NONE \
}, \
}
JAGUAR2_P(0, SG0, NONE);
JAGUAR2_P(1, SG0, NONE);
JAGUAR2_P(2, SG0, NONE);
JAGUAR2_P(3, SG0, NONE);
JAGUAR2_P(4, SG1, NONE);
JAGUAR2_P(5, SG1, NONE);
JAGUAR2_P(6, IRQ0_IN, IRQ0_OUT);
JAGUAR2_P(7, IRQ1_IN, IRQ1_OUT);
JAGUAR2_P(8, PTP0, NONE);
JAGUAR2_P(9, PTP1, NONE);
JAGUAR2_P(10, UART, NONE);
JAGUAR2_P(11, UART, NONE);
JAGUAR2_P(12, SG1, NONE);
JAGUAR2_P(13, SG1, NONE);
JAGUAR2_P(14, TWI, TWI_SCL_M);
JAGUAR2_P(15, TWI, NONE);
JAGUAR2_P(16, SI, TWI_SCL_M);
JAGUAR2_P(17, SI, TWI_SCL_M);
JAGUAR2_P(18, SI, TWI_SCL_M);
JAGUAR2_P(19, PCI_WAKE, NONE);
JAGUAR2_P(20, IRQ0_OUT, TWI_SCL_M);
JAGUAR2_P(21, IRQ1_OUT, TWI_SCL_M);
JAGUAR2_P(22, TACHO, NONE);
JAGUAR2_P(23, PWM, NONE);
JAGUAR2_P(24, UART2, NONE);
JAGUAR2_P(25, UART2, SI);
JAGUAR2_P(26, PTP2, SI);
JAGUAR2_P(27, PTP3, SI);
JAGUAR2_P(28, TWI2, SI);
JAGUAR2_P(29, TWI2, SI);
JAGUAR2_P(30, SG2, SI);
JAGUAR2_P(31, SG2, SI);
JAGUAR2_P(32, SG2, SI);
JAGUAR2_P(33, SG2, SI);
JAGUAR2_P(34, NONE, TWI_SCL_M);
JAGUAR2_P(35, NONE, TWI_SCL_M);
JAGUAR2_P(36, NONE, TWI_SCL_M);
JAGUAR2_P(37, NONE, TWI_SCL_M);
JAGUAR2_P(38, NONE, TWI_SCL_M);
JAGUAR2_P(39, NONE, TWI_SCL_M);
JAGUAR2_P(40, NONE, TWI_SCL_M);
JAGUAR2_P(41, NONE, TWI_SCL_M);
JAGUAR2_P(42, NONE, TWI_SCL_M);
JAGUAR2_P(43, NONE, TWI_SCL_M);
JAGUAR2_P(44, NONE, SFP8);
JAGUAR2_P(45, NONE, SFP9);
JAGUAR2_P(46, NONE, SFP10);
JAGUAR2_P(47, NONE, SFP11);
JAGUAR2_P(48, SFP0, NONE);
JAGUAR2_P(49, SFP1, SI);
JAGUAR2_P(50, SFP2, SI);
JAGUAR2_P(51, SFP3, SI);
JAGUAR2_P(52, SFP4, NONE);
JAGUAR2_P(53, SFP5, NONE);
JAGUAR2_P(54, SFP6, NONE);
JAGUAR2_P(55, SFP7, NONE);
JAGUAR2_P(56, MIIM1, SFP12);
JAGUAR2_P(57, MIIM1, SFP13);
JAGUAR2_P(58, MIIM2, SFP14);
JAGUAR2_P(59, MIIM2, SFP15);
JAGUAR2_P(60, NONE, NONE);
JAGUAR2_P(61, NONE, NONE);
JAGUAR2_P(62, NONE, NONE);
JAGUAR2_P(63, NONE, NONE);
#define JAGUAR2_PIN(n) { \
.number = n, \
.name = "GPIO_"#n, \
.drv_data = &jaguar2_pin_##n \
}
static const struct pinctrl_pin_desc jaguar2_pins[] = {
JAGUAR2_PIN(0),
JAGUAR2_PIN(1),
JAGUAR2_PIN(2),
JAGUAR2_PIN(3),
JAGUAR2_PIN(4),
JAGUAR2_PIN(5),
JAGUAR2_PIN(6),
JAGUAR2_PIN(7),
JAGUAR2_PIN(8),
JAGUAR2_PIN(9),
JAGUAR2_PIN(10),
JAGUAR2_PIN(11),
JAGUAR2_PIN(12),
JAGUAR2_PIN(13),
JAGUAR2_PIN(14),
JAGUAR2_PIN(15),
JAGUAR2_PIN(16),
JAGUAR2_PIN(17),
JAGUAR2_PIN(18),
JAGUAR2_PIN(19),
JAGUAR2_PIN(20),
JAGUAR2_PIN(21),
JAGUAR2_PIN(22),
JAGUAR2_PIN(23),
JAGUAR2_PIN(24),
JAGUAR2_PIN(25),
JAGUAR2_PIN(26),
JAGUAR2_PIN(27),
JAGUAR2_PIN(28),
JAGUAR2_PIN(29),
JAGUAR2_PIN(30),
JAGUAR2_PIN(31),
JAGUAR2_PIN(32),
JAGUAR2_PIN(33),
JAGUAR2_PIN(34),
JAGUAR2_PIN(35),
JAGUAR2_PIN(36),
JAGUAR2_PIN(37),
JAGUAR2_PIN(38),
JAGUAR2_PIN(39),
JAGUAR2_PIN(40),
JAGUAR2_PIN(41),
JAGUAR2_PIN(42),
JAGUAR2_PIN(43),
JAGUAR2_PIN(44),
JAGUAR2_PIN(45),
JAGUAR2_PIN(46),
JAGUAR2_PIN(47),
JAGUAR2_PIN(48),
JAGUAR2_PIN(49),
JAGUAR2_PIN(50),
JAGUAR2_PIN(51),
JAGUAR2_PIN(52),
JAGUAR2_PIN(53),
JAGUAR2_PIN(54),
JAGUAR2_PIN(55),
JAGUAR2_PIN(56),
JAGUAR2_PIN(57),
JAGUAR2_PIN(58),
JAGUAR2_PIN(59),
JAGUAR2_PIN(60),
JAGUAR2_PIN(61),
JAGUAR2_PIN(62),
JAGUAR2_PIN(63),
};
static int ocelot_get_functions_count(struct pinctrl_dev *pctldev)
{
return ARRAY_SIZE(ocelot_function_names);
}
static const char *ocelot_get_function_name(struct pinctrl_dev *pctldev,
unsigned int function)
{
return ocelot_function_names[function];
}
static int ocelot_get_function_groups(struct pinctrl_dev *pctldev,
unsigned int function,
const char *const **groups,
unsigned *const num_groups)
{
struct ocelot_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
*groups = info->func[function].groups;
*num_groups = info->func[function].ngroups;
return 0;
}
static int ocelot_pin_function_idx(struct ocelot_pinctrl *info,
unsigned int pin, unsigned int function)
{
struct ocelot_pin_caps *p = info->desc->pins[pin].drv_data;
int i;
for (i = 0; i < OCELOT_FUNC_PER_PIN; i++) {
if (function == p->functions[i])
return i;
}
return -1;
}
#define REG(r, info, p) ((r) * (info)->stride + (4 * ((p) / 32)))
static int ocelot_pinmux_set_mux(struct pinctrl_dev *pctldev,
unsigned int selector, unsigned int group)
{
struct ocelot_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
struct ocelot_pin_caps *pin = info->desc->pins[group].drv_data;
unsigned int p = pin->pin % 32;
int f;
f = ocelot_pin_function_idx(info, group, selector);
if (f < 0)
return -EINVAL;
/*
* f is encoded on two bits.
* bit 0 of f goes in BIT(pin) of ALT0, bit 1 of f goes in BIT(pin) of
* ALT1
* This is racy because both registers can't be updated at the same time
* but it doesn't matter much for now.
*/
regmap_update_bits(info->map, REG(OCELOT_GPIO_ALT0, info, pin->pin),
BIT(p), f << p);
regmap_update_bits(info->map, REG(OCELOT_GPIO_ALT1, info, pin->pin),
BIT(p), f << (p - 1));
return 0;
}
static int ocelot_gpio_set_direction(struct pinctrl_dev *pctldev,
struct pinctrl_gpio_range *range,
unsigned int pin, bool input)
{
struct ocelot_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
unsigned int p = pin % 32;
regmap_update_bits(info->map, REG(OCELOT_GPIO_OE, info, p), BIT(p),
input ? 0 : BIT(p));
return 0;
}
static int ocelot_gpio_request_enable(struct pinctrl_dev *pctldev,
struct pinctrl_gpio_range *range,
unsigned int offset)
{
struct ocelot_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
unsigned int p = offset % 32;
regmap_update_bits(info->map, REG(OCELOT_GPIO_ALT0, info, offset),
BIT(p), 0);
regmap_update_bits(info->map, REG(OCELOT_GPIO_ALT1, info, offset),
BIT(p), 0);
return 0;
}
static const struct pinmux_ops ocelot_pmx_ops = {
.get_functions_count = ocelot_get_functions_count,
.get_function_name = ocelot_get_function_name,
.get_function_groups = ocelot_get_function_groups,
.set_mux = ocelot_pinmux_set_mux,
.gpio_set_direction = ocelot_gpio_set_direction,
.gpio_request_enable = ocelot_gpio_request_enable,
};
static int ocelot_pctl_get_groups_count(struct pinctrl_dev *pctldev)
{
struct ocelot_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
return info->desc->npins;
}
static const char *ocelot_pctl_get_group_name(struct pinctrl_dev *pctldev,
unsigned int group)
{
struct ocelot_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
return info->desc->pins[group].name;
}
static int ocelot_pctl_get_group_pins(struct pinctrl_dev *pctldev,
unsigned int group,
const unsigned int **pins,
unsigned int *num_pins)
{
struct ocelot_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
*pins = &info->desc->pins[group].number;
*num_pins = 1;
return 0;
}
static const struct pinctrl_ops ocelot_pctl_ops = {
.get_groups_count = ocelot_pctl_get_groups_count,
.get_group_name = ocelot_pctl_get_group_name,
.get_group_pins = ocelot_pctl_get_group_pins,
.dt_node_to_map = pinconf_generic_dt_node_to_map_pin,
.dt_free_map = pinconf_generic_dt_free_map,
};
static struct pinctrl_desc ocelot_desc = {
.name = "ocelot-pinctrl",
.pins = ocelot_pins,
.npins = ARRAY_SIZE(ocelot_pins),
.pctlops = &ocelot_pctl_ops,
.pmxops = &ocelot_pmx_ops,
.owner = THIS_MODULE,
};
static struct pinctrl_desc jaguar2_desc = {
.name = "jaguar2-pinctrl",
.pins = jaguar2_pins,
.npins = ARRAY_SIZE(jaguar2_pins),
.pctlops = &ocelot_pctl_ops,
.pmxops = &ocelot_pmx_ops,
.owner = THIS_MODULE,
};
static int ocelot_create_group_func_map(struct device *dev,
struct ocelot_pinctrl *info)
{
int f, npins, i;
u8 *pins = kcalloc(info->desc->npins, sizeof(u8), GFP_KERNEL);
if (!pins)
return -ENOMEM;
for (f = 0; f < FUNC_MAX; f++) {
for (npins = 0, i = 0; i < info->desc->npins; i++) {
if (ocelot_pin_function_idx(info, i, f) >= 0)
pins[npins++] = i;
}
if (!npins)
continue;
info->func[f].ngroups = npins;
info->func[f].groups = devm_kcalloc(dev, npins, sizeof(char *),
GFP_KERNEL);
if (!info->func[f].groups) {
kfree(pins);
return -ENOMEM;
}
for (i = 0; i < npins; i++)
info->func[f].groups[i] = info->desc->pins[pins[i]].name;
}
kfree(pins);
return 0;
}
static int ocelot_pinctrl_register(struct platform_device *pdev,
struct ocelot_pinctrl *info)
{
int ret;
ret = ocelot_create_group_func_map(&pdev->dev, info);
if (ret) {
dev_err(&pdev->dev, "Unable to create group func map.\n");
return ret;
}
info->pctl = devm_pinctrl_register(&pdev->dev, info->desc, info);
if (IS_ERR(info->pctl)) {
dev_err(&pdev->dev, "Failed to register pinctrl\n");
return PTR_ERR(info->pctl);
}
return 0;
}
static int ocelot_gpio_get(struct gpio_chip *chip, unsigned int offset)
{
struct ocelot_pinctrl *info = gpiochip_get_data(chip);
unsigned int val;
regmap_read(info->map, REG(OCELOT_GPIO_IN, info, offset), &val);
return !!(val & BIT(offset % 32));
}
static void ocelot_gpio_set(struct gpio_chip *chip, unsigned int offset,
int value)
{
struct ocelot_pinctrl *info = gpiochip_get_data(chip);
if (value)
regmap_write(info->map, REG(OCELOT_GPIO_OUT_SET, info, offset),
BIT(offset % 32));
else
regmap_write(info->map, REG(OCELOT_GPIO_OUT_CLR, info, offset),
BIT(offset % 32));
}
static int ocelot_gpio_get_direction(struct gpio_chip *chip,
unsigned int offset)
{
struct ocelot_pinctrl *info = gpiochip_get_data(chip);
unsigned int val;
regmap_read(info->map, REG(OCELOT_GPIO_OE, info, offset), &val);
return !(val & BIT(offset % 32));
}
static int ocelot_gpio_direction_input(struct gpio_chip *chip,
unsigned int offset)
{
return pinctrl_gpio_direction_input(chip->base + offset);
}
static int ocelot_gpio_direction_output(struct gpio_chip *chip,
unsigned int offset, int value)
{
struct ocelot_pinctrl *info = gpiochip_get_data(chip);
unsigned int pin = BIT(offset % 32);
if (value)
regmap_write(info->map, REG(OCELOT_GPIO_OUT_SET, info, offset),
pin);
else
regmap_write(info->map, REG(OCELOT_GPIO_OUT_CLR, info, offset),
pin);
return pinctrl_gpio_direction_output(chip->base + offset);
}
static const struct gpio_chip ocelot_gpiolib_chip = {
.request = gpiochip_generic_request,
.free = gpiochip_generic_free,
.set = ocelot_gpio_set,
.get = ocelot_gpio_get,
.get_direction = ocelot_gpio_get_direction,
.direction_input = ocelot_gpio_direction_input,
.direction_output = ocelot_gpio_direction_output,
.owner = THIS_MODULE,
};
static void ocelot_irq_mask(struct irq_data *data)
{
struct gpio_chip *chip = irq_data_get_irq_chip_data(data);
struct ocelot_pinctrl *info = gpiochip_get_data(chip);
unsigned int gpio = irqd_to_hwirq(data);
regmap_update_bits(info->map, REG(OCELOT_GPIO_INTR_ENA, info, gpio),
BIT(gpio % 32), 0);
}
static void ocelot_irq_unmask(struct irq_data *data)
{
struct gpio_chip *chip = irq_data_get_irq_chip_data(data);
struct ocelot_pinctrl *info = gpiochip_get_data(chip);
unsigned int gpio = irqd_to_hwirq(data);
regmap_update_bits(info->map, REG(OCELOT_GPIO_INTR_ENA, info, gpio),
BIT(gpio % 32), BIT(gpio % 32));
}
static void ocelot_irq_ack(struct irq_data *data)
{
struct gpio_chip *chip = irq_data_get_irq_chip_data(data);
struct ocelot_pinctrl *info = gpiochip_get_data(chip);
unsigned int gpio = irqd_to_hwirq(data);
regmap_write_bits(info->map, REG(OCELOT_GPIO_INTR, info, gpio),
BIT(gpio % 32), BIT(gpio % 32));
}
static int ocelot_irq_set_type(struct irq_data *data, unsigned int type);
static struct irq_chip ocelot_eoi_irqchip = {
.name = "gpio",
.irq_mask = ocelot_irq_mask,
.irq_eoi = ocelot_irq_ack,
.irq_unmask = ocelot_irq_unmask,
.flags = IRQCHIP_EOI_THREADED | IRQCHIP_EOI_IF_HANDLED,
.irq_set_type = ocelot_irq_set_type,
};
static struct irq_chip ocelot_irqchip = {
.name = "gpio",
.irq_mask = ocelot_irq_mask,
.irq_ack = ocelot_irq_ack,
.irq_unmask = ocelot_irq_unmask,
.irq_set_type = ocelot_irq_set_type,
};
static int ocelot_irq_set_type(struct irq_data *data, unsigned int type)
{
type &= IRQ_TYPE_SENSE_MASK;
if (!(type & (IRQ_TYPE_EDGE_BOTH | IRQ_TYPE_LEVEL_HIGH)))
return -EINVAL;
if (type & IRQ_TYPE_LEVEL_HIGH)
irq_set_chip_handler_name_locked(data, &ocelot_eoi_irqchip,
handle_fasteoi_irq, NULL);
if (type & IRQ_TYPE_EDGE_BOTH)
irq_set_chip_handler_name_locked(data, &ocelot_irqchip,
handle_edge_irq, NULL);
return 0;
}
static void ocelot_irq_handler(struct irq_desc *desc)
{
struct irq_chip *parent_chip = irq_desc_get_chip(desc);
struct gpio_chip *chip = irq_desc_get_handler_data(desc);
struct ocelot_pinctrl *info = gpiochip_get_data(chip);
unsigned int reg = 0, irq, i;
unsigned long irqs;
for (i = 0; i < info->stride; i++) {
regmap_read(info->map, OCELOT_GPIO_INTR_IDENT + 4 * i, &reg);
if (!reg)
continue;
chained_irq_enter(parent_chip, desc);
irqs = reg;
for_each_set_bit(irq, &irqs,
min(32U, info->desc->npins - 32 * i))
generic_handle_irq(irq_linear_revmap(chip->irq.domain,
irq + 32 * i));
chained_irq_exit(parent_chip, desc);
}
}
static int ocelot_gpiochip_register(struct platform_device *pdev,
struct ocelot_pinctrl *info)
{
struct gpio_chip *gc;
int ret, irq;
info->gpio_chip = ocelot_gpiolib_chip;
gc = &info->gpio_chip;
gc->ngpio = info->desc->npins;
gc->parent = &pdev->dev;
gc->base = 0;
gc->of_node = info->dev->of_node;
gc->label = "ocelot-gpio";
ret = devm_gpiochip_add_data(&pdev->dev, gc, info);
if (ret)
return ret;
irq = irq_of_parse_and_map(pdev->dev.of_node, 0);
if (irq <= 0)
return irq;
ret = gpiochip_irqchip_add(gc, &ocelot_irqchip, 0, handle_edge_irq,
IRQ_TYPE_NONE);
if (ret)
return ret;
gpiochip_set_chained_irqchip(gc, &ocelot_irqchip, irq,
ocelot_irq_handler);
return 0;
}
static const struct of_device_id ocelot_pinctrl_of_match[] = {
{ .compatible = "mscc,ocelot-pinctrl", .data = &ocelot_desc },
{ .compatible = "mscc,jaguar2-pinctrl", .data = &jaguar2_desc },
{},
};
static int ocelot_pinctrl_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct ocelot_pinctrl *info;
void __iomem *base;
int ret;
struct regmap_config regmap_config = {
.reg_bits = 32,
.val_bits = 32,
.reg_stride = 4,
};
info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
if (!info)
return -ENOMEM;
info->desc = (struct pinctrl_desc *)device_get_match_data(dev);
base = devm_ioremap_resource(dev,
platform_get_resource(pdev, IORESOURCE_MEM, 0));
if (IS_ERR(base)) {
dev_err(dev, "Failed to ioremap registers\n");
return PTR_ERR(base);
}
info->stride = 1 + (info->desc->npins - 1) / 32;
regmap_config.max_register = OCELOT_GPIO_SD_MAP * info->stride + 15 * 4;
info->map = devm_regmap_init_mmio(dev, base, &regmap_config);
if (IS_ERR(info->map)) {
dev_err(dev, "Failed to create regmap\n");
return PTR_ERR(info->map);
}
dev_set_drvdata(dev, info->map);
info->dev = dev;
ret = ocelot_pinctrl_register(pdev, info);
if (ret)
return ret;
ret = ocelot_gpiochip_register(pdev, info);
if (ret)
return ret;
return 0;
}
static struct platform_driver ocelot_pinctrl_driver = {
.driver = {
.name = "pinctrl-ocelot",
.of_match_table = of_match_ptr(ocelot_pinctrl_of_match),
.suppress_bind_attrs = true,
},
.probe = ocelot_pinctrl_probe,
};
builtin_platform_driver(ocelot_pinctrl_driver);
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