/*
* Marvell 37xx SoC pinctrl driver
*
* Copyright (C) 2017 Marvell
*
* Gregory CLEMENT <gregory.clement@free-electrons.com>
*
* This file is licensed under the terms of the GNU General Public
* License version 2 or later. This program is licensed "as is"
* without any warranty of any kind, whether express or implied.
*/
#include <linux/gpio/driver.h>
#include <linux/mfd/syscon.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_device.h>
#include <linux/of_irq.h>
#include <linux/pinctrl/pinconf-generic.h>
#include <linux/pinctrl/pinconf.h>
#include <linux/pinctrl/pinctrl.h>
#include <linux/pinctrl/pinmux.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include "../pinctrl-utils.h"
#define OUTPUT_EN 0x0
#define INPUT_VAL 0x10
#define OUTPUT_VAL 0x18
#define OUTPUT_CTL 0x20
#define SELECTION 0x30
#define IRQ_EN 0x0
#define IRQ_POL 0x08
#define IRQ_STATUS 0x10
#define IRQ_WKUP 0x18
#define NB_FUNCS 3
#define GPIO_PER_REG 32
/**
* struct armada_37xx_pin_group: represents group of pins of a pinmux function.
* The pins of a pinmux groups are composed of one or two groups of contiguous
* pins.
* @name: Name of the pin group, used to lookup the group.
* @start_pin: Index of the first pin of the main range of pins belonging to
* the group
* @npins: Number of pins included in the first range
* @reg_mask: Bit mask matching the group in the selection register
* @val: Value to write to the registers for a given function
* @extra_pin: Index of the first pin of the optional second range of pins
* belonging to the group
* @extra_npins:Number of pins included in the second optional range
* @funcs: A list of pinmux functions that can be selected for this group.
* @pins: List of the pins included in the group
*/
struct armada_37xx_pin_group {
const char *name;
unsigned int start_pin;
unsigned int npins;
u32 reg_mask;
u32 val[NB_FUNCS];
unsigned int extra_pin;
unsigned int extra_npins;
const char *funcs[NB_FUNCS];
unsigned int *pins;
};
struct armada_37xx_pin_data {
u8 nr_pins;
char *name;
struct armada_37xx_pin_group *groups;
int ngroups;
};
struct armada_37xx_pmx_func {
const char *name;
const char **groups;
unsigned int ngroups;
};
struct armada_37xx_pm_state {
u32 out_en_l;
u32 out_en_h;
u32 out_val_l;
u32 out_val_h;
u32 irq_en_l;
u32 irq_en_h;
u32 irq_pol_l;
u32 irq_pol_h;
u32 selection;
};
struct armada_37xx_pinctrl {
struct regmap *regmap;
void __iomem *base;
const struct armada_37xx_pin_data *data;
struct device *dev;
struct gpio_chip gpio_chip;
struct irq_chip irq_chip;
spinlock_t irq_lock;
struct pinctrl_desc pctl;
struct pinctrl_dev *pctl_dev;
struct armada_37xx_pin_group *groups;
unsigned int ngroups;
struct armada_37xx_pmx_func *funcs;
unsigned int nfuncs;
struct armada_37xx_pm_state pm;
};
#define PIN_GRP(_name, _start, _nr, _mask, _func1, _func2) \
{ \
.name = _name, \
.start_pin = _start, \
.npins = _nr, \
.reg_mask = _mask, \
.val = {0, _mask}, \
.funcs = {_func1, _func2} \
}
#define PIN_GRP_GPIO(_name, _start, _nr, _mask, _func1) \
{ \
.name = _name, \
.start_pin = _start, \
.npins = _nr, \
.reg_mask = _mask, \
.val = {0, _mask}, \
.funcs = {_func1, "gpio"} \
}
#define PIN_GRP_GPIO_2(_name, _start, _nr, _mask, _val1, _val2, _func1) \
{ \
.name = _name, \
.start_pin = _start, \
.npins = _nr, \
.reg_mask = _mask, \
.val = {_val1, _val2}, \
.funcs = {_func1, "gpio"} \
}
#define PIN_GRP_GPIO_3(_name, _start, _nr, _mask, _v1, _v2, _v3, _f1, _f2) \
{ \
.name = _name, \
.start_pin = _start, \
.npins = _nr, \
.reg_mask = _mask, \
.val = {_v1, _v2, _v3}, \
.funcs = {_f1, _f2, "gpio"} \
}
#define PIN_GRP_EXTRA(_name, _start, _nr, _mask, _v1, _v2, _start2, _nr2, \
_f1, _f2) \
{ \
.name = _name, \
.start_pin = _start, \
.npins = _nr, \
.reg_mask = _mask, \
.val = {_v1, _v2}, \
.extra_pin = _start2, \
.extra_npins = _nr2, \
.funcs = {_f1, _f2} \
}
static struct armada_37xx_pin_group armada_37xx_nb_groups[] = {
PIN_GRP_GPIO("jtag", 20, 5, BIT(0), "jtag"),
PIN_GRP_GPIO("sdio0", 8, 3, BIT(1), "sdio"),
PIN_GRP_GPIO("emmc_nb", 27, 9, BIT(2),