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linux-sg2042/drivers/pinctrl/pinctrl-equilibrium.c

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// SPDX-License-Identifier: GPL-2.0
/* Copyright (C) 2019 Intel Corporation */
#include <linux/gpio/driver.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/pinctrl/pinctrl.h>
#include <linux/pinctrl/pinconf.h>
#include <linux/pinctrl/pinconf-generic.h>
#include <linux/pinctrl/pinmux.h>
#include <linux/platform_device.h>
#include "core.h"
#include "pinconf.h"
#include "pinmux.h"
#include "pinctrl-equilibrium.h"
#define PIN_NAME_FMT "io-%d"
#define PIN_NAME_LEN 10
#define PAD_REG_OFF 0x100
static void eqbr_gpio_disable_irq(struct irq_data *d)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
struct eqbr_gpio_ctrl *gctrl = gpiochip_get_data(gc);
unsigned int offset = irqd_to_hwirq(d);
unsigned long flags;
raw_spin_lock_irqsave(&gctrl->lock, flags);
writel(BIT(offset), gctrl->membase + GPIO_IRNENCLR);
raw_spin_unlock_irqrestore(&gctrl->lock, flags);
}
static void eqbr_gpio_enable_irq(struct irq_data *d)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
struct eqbr_gpio_ctrl *gctrl = gpiochip_get_data(gc);
unsigned int offset = irqd_to_hwirq(d);
unsigned long flags;
gc->direction_input(gc, offset);
raw_spin_lock_irqsave(&gctrl->lock, flags);
writel(BIT(offset), gctrl->membase + GPIO_IRNRNSET);
raw_spin_unlock_irqrestore(&gctrl->lock, flags);
}
static void eqbr_gpio_ack_irq(struct irq_data *d)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
struct eqbr_gpio_ctrl *gctrl = gpiochip_get_data(gc);
unsigned int offset = irqd_to_hwirq(d);
unsigned long flags;
raw_spin_lock_irqsave(&gctrl->lock, flags);
writel(BIT(offset), gctrl->membase + GPIO_IRNCR);
raw_spin_unlock_irqrestore(&gctrl->lock, flags);
}
static void eqbr_gpio_mask_ack_irq(struct irq_data *d)
{
eqbr_gpio_disable_irq(d);
eqbr_gpio_ack_irq(d);
}
static inline void eqbr_cfg_bit(void __iomem *addr,
unsigned int offset, unsigned int set)
{
if (set)
writel(readl(addr) | BIT(offset), addr);
else
writel(readl(addr) & ~BIT(offset), addr);
}
static int eqbr_irq_type_cfg(struct gpio_irq_type *type,
struct eqbr_gpio_ctrl *gctrl,
unsigned int offset)
{
unsigned long flags;
raw_spin_lock_irqsave(&gctrl->lock, flags);
eqbr_cfg_bit(gctrl->membase + GPIO_IRNCFG, offset, type->trig_type);
eqbr_cfg_bit(gctrl->membase + GPIO_EXINTCR1, offset, type->trig_type);
eqbr_cfg_bit(gctrl->membase + GPIO_EXINTCR0, offset, type->logic_type);
raw_spin_unlock_irqrestore(&gctrl->lock, flags);
return 0;
}
static int eqbr_gpio_set_irq_type(struct irq_data *d, unsigned int type)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
struct eqbr_gpio_ctrl *gctrl = gpiochip_get_data(gc);
unsigned int offset = irqd_to_hwirq(d);
struct gpio_irq_type it;
memset(&it, 0, sizeof(it));
if ((type & IRQ_TYPE_SENSE_MASK) == IRQ_TYPE_NONE)
return 0;
switch (type) {
case IRQ_TYPE_EDGE_RISING:
it.trig_type = GPIO_EDGE_TRIG;
it.edge_type = GPIO_SINGLE_EDGE;
it.logic_type = GPIO_POSITIVE_TRIG;
break;
case IRQ_TYPE_EDGE_FALLING:
it.trig_type = GPIO_EDGE_TRIG;
it.edge_type = GPIO_SINGLE_EDGE;
it.logic_type = GPIO_NEGATIVE_TRIG;
break;
case IRQ_TYPE_EDGE_BOTH:
it.trig_type = GPIO_EDGE_TRIG;
it.edge_type = GPIO_BOTH_EDGE;
it.logic_type = GPIO_POSITIVE_TRIG;
break;
case IRQ_TYPE_LEVEL_HIGH:
it.trig_type = GPIO_LEVEL_TRIG;
it.edge_type = GPIO_SINGLE_EDGE;
it.logic_type = GPIO_POSITIVE_TRIG;
break;
case IRQ_TYPE_LEVEL_LOW:
it.trig_type = GPIO_LEVEL_TRIG;
it.edge_type = GPIO_SINGLE_EDGE;
it.logic_type = GPIO_NEGATIVE_TRIG;
break;
default:
return -EINVAL;
}
eqbr_irq_type_cfg(&it, gctrl, offset);
if (it.trig_type == GPIO_EDGE_TRIG)
irq_set_handler_locked(d, handle_edge_irq);
else
irq_set_handler_locked(d, handle_level_irq);
return 0;
}
static void eqbr_irq_handler(struct irq_desc *desc)
{
struct gpio_chip *gc = irq_desc_get_handler_data(desc);
struct eqbr_gpio_ctrl *gctrl = gpiochip_get_data(gc);
struct irq_chip *ic = irq_desc_get_chip(desc);
unsigned long pins, offset;
chained_irq_enter(ic, desc);
pins = readl(gctrl->membase + GPIO_IRNCR);
for_each_set_bit(offset, &pins, gc->ngpio)
generic_handle_irq(irq_find_mapping(gc->irq.domain, offset));
chained_irq_exit(ic, desc);
}
static int gpiochip_setup(struct device *dev, struct eqbr_gpio_ctrl *gctrl)
{
struct gpio_irq_chip *girq;
struct gpio_chip *gc;
gc = &gctrl->chip;
gc->label = gctrl->name;
#if defined(CONFIG_OF_GPIO)
gc->of_node = gctrl->node;
#endif
if (!of_property_read_bool(gctrl->node, "interrupt-controller")) {
dev_dbg(dev, "gc %s: doesn't act as interrupt controller!\n",
gctrl->name);
return 0;
}
gctrl->ic.name = "gpio_irq";
gctrl->ic.irq_mask = eqbr_gpio_disable_irq;
gctrl->ic.irq_unmask = eqbr_gpio_enable_irq;
gctrl->ic.irq_ack = eqbr_gpio_ack_irq;
gctrl->ic.irq_mask_ack = eqbr_gpio_mask_ack_irq;
gctrl->ic.irq_set_type = eqbr_gpio_set_irq_type;
girq = &gctrl->chip.irq;
girq->chip = &gctrl->ic;
girq->parent_handler = eqbr_irq_handler;
girq->num_parents = 1;
girq->parents = devm_kcalloc(dev, 1, sizeof(*girq->parents), GFP_KERNEL);
if (!girq->parents)
return -ENOMEM;
girq->default_type = IRQ_TYPE_NONE;
girq->handler = handle_bad_irq;
girq->parents[0] = gctrl->virq;
return 0;
}
static int gpiolib_reg(struct eqbr_pinctrl_drv_data *drvdata)
{
struct device *dev = drvdata->dev;
struct eqbr_gpio_ctrl *gctrl;
struct device_node *np;
struct resource res;
int i, ret;
for (i = 0; i < drvdata->nr_gpio_ctrls; i++) {
gctrl = drvdata->gpio_ctrls + i;
np = gctrl->node;
gctrl->name = devm_kasprintf(dev, GFP_KERNEL, "gpiochip%d", i);
if (!gctrl->name)
return -ENOMEM;
if (of_address_to_resource(np, 0, &res)) {
dev_err(dev, "Failed to get GPIO register address\n");
return -ENXIO;
}
gctrl->membase = devm_ioremap_resource(dev, &res);
if (IS_ERR(gctrl->membase))
return PTR_ERR(gctrl->membase);
gctrl->virq = irq_of_parse_and_map(np, 0);
if (!gctrl->virq) {
dev_err(dev, "%s: failed to parse and map irq\n",
gctrl->name);
return -ENXIO;
}
raw_spin_lock_init(&gctrl->lock);
ret = bgpio_init(&gctrl->chip, dev, gctrl->bank->nr_pins / 8,
gctrl->membase + GPIO_IN,
gctrl->membase + GPIO_OUTSET,
gctrl->membase + GPIO_OUTCLR,
gctrl->membase + GPIO_DIR,
NULL, 0);
if (ret) {
dev_err(dev, "unable to init generic GPIO\n");
return ret;
}
ret = gpiochip_setup(dev, gctrl);
if (ret)
return ret;
ret = devm_gpiochip_add_data(dev, &gctrl->chip, gctrl);
if (ret)
return ret;
}
return 0;
}
static inline struct eqbr_pin_bank
*find_pinbank_via_pin(struct eqbr_pinctrl_drv_data *pctl, unsigned int pin)
{
struct eqbr_pin_bank *bank;
int i;
for (i = 0; i < pctl->nr_banks; i++) {
bank = &pctl->pin_banks[i];
if (pin >= bank->pin_base &&
(pin - bank->pin_base) < bank->nr_pins)
return bank;
}
return NULL;
}
static const struct pinctrl_ops eqbr_pctl_ops = {
.get_groups_count = pinctrl_generic_get_group_count,
.get_group_name = pinctrl_generic_get_group_name,
.get_group_pins = pinctrl_generic_get_group_pins,
.dt_node_to_map = pinconf_generic_dt_node_to_map_all,
.dt_free_map = pinconf_generic_dt_free_map,
};
static int eqbr_set_pin_mux(struct eqbr_pinctrl_drv_data *pctl,
unsigned int pmx, unsigned int pin)
{
struct eqbr_pin_bank *bank;
unsigned long flags;
unsigned int offset;
void __iomem *mem;
bank = find_pinbank_via_pin(pctl, pin);
if (!bank) {
dev_err(pctl->dev, "Couldn't find pin bank for pin %u\n", pin);
return -ENODEV;
}
mem = bank->membase;
offset = pin - bank->pin_base;
if (!(bank->aval_pinmap & BIT(offset))) {
dev_err(pctl->dev,
"PIN: %u is not valid, pinbase: %u, bitmap: %u\n",
pin, bank->pin_base, bank->aval_pinmap);
return -ENODEV;
}
raw_spin_lock_irqsave(&pctl->lock, flags);
writel(pmx, mem + (offset * 4));
raw_spin_unlock_irqrestore(&pctl->lock, flags);
return 0;
}
static int eqbr_pinmux_set_mux(struct pinctrl_dev *pctldev,
unsigned int selector, unsigned int group)
{
struct eqbr_pinctrl_drv_data *pctl = pinctrl_dev_get_drvdata(pctldev);
struct function_desc *func;
struct group_desc *grp;
unsigned int *pinmux;
int i;
func = pinmux_generic_get_function(pctldev, selector);
if (!func)
return -EINVAL;
grp = pinctrl_generic_get_group(pctldev, group);
if (!grp)
return -EINVAL;
pinmux = grp->data;
for (i = 0; i < grp->num_pins; i++)
eqbr_set_pin_mux(pctl, pinmux[i], grp->pins[i]);
return 0;
}
static int eqbr_pinmux_gpio_request(struct pinctrl_dev *pctldev,
struct pinctrl_gpio_range *range,
unsigned int pin)
{
struct eqbr_pinctrl_drv_data *pctl = pinctrl_dev_get_drvdata(pctldev);
return eqbr_set_pin_mux(pctl, EQBR_GPIO_MODE, pin);
}
static const struct pinmux_ops eqbr_pinmux_ops = {
.get_functions_count = pinmux_generic_get_function_count,
.get_function_name = pinmux_generic_get_function_name,
.get_function_groups = pinmux_generic_get_function_groups,
.set_mux = eqbr_pinmux_set_mux,
.gpio_request_enable = eqbr_pinmux_gpio_request,
.strict = true,
};
static int get_drv_cur(void __iomem *mem, unsigned int offset)
{
unsigned int idx = offset / DRV_CUR_PINS; /* 0-15, 16-31 per register*/
unsigned int pin_offset = offset % DRV_CUR_PINS;
return PARSE_DRV_CURRENT(readl(mem + REG_DRCC(idx)), pin_offset);
}
static struct eqbr_gpio_ctrl
*get_gpio_ctrls_via_bank(struct eqbr_pinctrl_drv_data *pctl,
struct eqbr_pin_bank *bank)
{
int i;
for (i = 0; i < pctl->nr_gpio_ctrls; i++) {
if (pctl->gpio_ctrls[i].bank == bank)
return &pctl->gpio_ctrls[i];
}
return NULL;
}
static int eqbr_pinconf_get(struct pinctrl_dev *pctldev, unsigned int pin,
unsigned long *config)
{
struct eqbr_pinctrl_drv_data *pctl = pinctrl_dev_get_drvdata(pctldev);
enum pin_config_param param = pinconf_to_config_param(*config);
struct eqbr_gpio_ctrl *gctrl;
struct eqbr_pin_bank *bank;
unsigned long flags;
unsigned int offset;
void __iomem *mem;
u32 val;
bank = find_pinbank_via_pin(pctl, pin);
if (!bank) {
dev_err(pctl->dev, "Couldn't find pin bank for pin %u\n", pin);
return -ENODEV;
}
mem = bank->membase;
offset = pin - bank->pin_base;
if (!(bank->aval_pinmap & BIT(offset))) {
dev_err(pctl->dev,
"PIN: %u is not valid, pinbase: %u, bitmap: %u\n",
pin, bank->pin_base, bank->aval_pinmap);
return -ENODEV;
}
raw_spin_lock_irqsave(&pctl->lock, flags);
switch (param) {
case PIN_CONFIG_BIAS_PULL_UP:
val = !!(readl(mem + REG_PUEN) & BIT(offset));
break;
case PIN_CONFIG_BIAS_PULL_DOWN:
val = !!(readl(mem + REG_PDEN) & BIT(offset));
break;
case PIN_CONFIG_DRIVE_OPEN_DRAIN:
val = !!(readl(mem + REG_OD) & BIT(offset));
break;
case PIN_CONFIG_DRIVE_STRENGTH:
val = get_drv_cur(mem, offset);
break;
case PIN_CONFIG_SLEW_RATE:
val = !!(readl(mem + REG_SRC) & BIT(offset));
break;
case PIN_CONFIG_OUTPUT_ENABLE:
gctrl = get_gpio_ctrls_via_bank(pctl, bank);
if (!gctrl) {
dev_err(pctl->dev, "Failed to find gpio via bank pinbase: %u, pin: %u\n",
bank->pin_base, pin);
raw_spin_unlock_irqrestore(&pctl->lock, flags);
return -ENODEV;
}
val = !!(readl(gctrl->membase + GPIO_DIR) & BIT(offset));
break;
default:
raw_spin_unlock_irqrestore(&pctl->lock, flags);
return -ENOTSUPP;
}
raw_spin_unlock_irqrestore(&pctl->lock, flags);
*config = pinconf_to_config_packed(param, val);
;
return 0;
}
static int eqbr_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
unsigned long *configs, unsigned int num_configs)
{
struct eqbr_pinctrl_drv_data *pctl = pinctrl_dev_get_drvdata(pctldev);
struct eqbr_gpio_ctrl *gctrl;
enum pin_config_param param;
struct eqbr_pin_bank *bank;
unsigned int val, offset;
struct gpio_chip *gc;
unsigned long flags;
void __iomem *mem;
u32 regval, mask;
int i;
for (i = 0; i < num_configs; i++) {
param = pinconf_to_config_param(configs[i]);
val = pinconf_to_config_argument(configs[i]);
bank = find_pinbank_via_pin(pctl, pin);
if (!bank) {
dev_err(pctl->dev,
"Couldn't find pin bank for pin %u\n", pin);
return -ENODEV;
}
mem = bank->membase;
offset = pin - bank->pin_base;
switch (param) {
case PIN_CONFIG_BIAS_PULL_UP:
mem += REG_PUEN;
mask = BIT(offset);
break;
case PIN_CONFIG_BIAS_PULL_DOWN:
mem += REG_PDEN;
mask = BIT(offset);
break;
case PIN_CONFIG_DRIVE_OPEN_DRAIN:
mem += REG_OD;
mask = BIT(offset);
break;
case PIN_CONFIG_DRIVE_STRENGTH:
mem += REG_DRCC(offset / DRV_CUR_PINS);
offset = (offset % DRV_CUR_PINS) * 2;
mask = GENMASK(1, 0) << offset;
break;
case PIN_CONFIG_SLEW_RATE:
mem += REG_SRC;
mask = BIT(offset);
break;
case PIN_CONFIG_OUTPUT_ENABLE:
gctrl = get_gpio_ctrls_via_bank(pctl, bank);
if (!gctrl) {
dev_err(pctl->dev, "Failed to find gpio via bank pinbase: %u, pin: %u\n",
bank->pin_base, pin);
return -ENODEV;
}
gc = &gctrl->chip;
gc->direction_output(gc, offset, 0);
continue;
default:
return -ENOTSUPP;
}
raw_spin_lock_irqsave(&pctl->lock, flags);
regval = readl(mem);
regval = (regval & ~mask) | ((val << offset) & mask);
writel(regval, mem);
raw_spin_unlock_irqrestore(&pctl->lock, flags);
}
return 0;
}
static int eqbr_pinconf_group_get(struct pinctrl_dev *pctldev,
unsigned int group, unsigned long *config)
{
unsigned int i, npins, old = 0;
const unsigned int *pins;
int ret;
ret = pinctrl_generic_get_group_pins(pctldev, group, &pins, &npins);
if (ret)
return ret;
for (i = 0; i < npins; i++) {
if (eqbr_pinconf_get(pctldev, pins[i], config))
return -ENOTSUPP;
if (i && old != *config)
return -ENOTSUPP;
old = *config;
}
return 0;
}
static int eqbr_pinconf_group_set(struct pinctrl_dev *pctldev,
unsigned int group, unsigned long *configs,
unsigned int num_configs)
{
const unsigned int *pins;
unsigned int i, npins;
int ret;
ret = pinctrl_generic_get_group_pins(pctldev, group, &pins, &npins);
if (ret)
return ret;
for (i = 0; i < npins; i++) {
ret = eqbr_pinconf_set(pctldev, pins[i], configs, num_configs);
if (ret)
return ret;
}
return 0;
}
static const struct pinconf_ops eqbr_pinconf_ops = {
.is_generic = true,
.pin_config_get = eqbr_pinconf_get,
.pin_config_set = eqbr_pinconf_set,
.pin_config_group_get = eqbr_pinconf_group_get,
.pin_config_group_set = eqbr_pinconf_group_set,
.pin_config_config_dbg_show = pinconf_generic_dump_config,
};
static bool is_func_exist(struct eqbr_pmx_func *funcs, const char *name,
unsigned int nr_funcs, unsigned int *idx)
{
int i;
if (!funcs)
return false;
for (i = 0; i < nr_funcs; i++) {
if (funcs[i].name && !strcmp(funcs[i].name, name)) {
*idx = i;
return true;
}
}
return false;
}
static int funcs_utils(struct device *dev, struct eqbr_pmx_func *funcs,
unsigned int *nr_funcs, funcs_util_ops op)
{
struct device_node *node = dev->of_node;
struct device_node *np;
struct property *prop;
const char *fn_name;
unsigned int fid;
int i, j;
i = 0;
for_each_child_of_node(node, np) {
prop = of_find_property(np, "groups", NULL);
if (!prop)
continue;
if (of_property_read_string(np, "function", &fn_name)) {
/* some groups may not have function, it's OK */
dev_dbg(dev, "Group %s: not function binded!\n",
(char *)prop->value);
continue;
}
switch (op) {
case OP_COUNT_NR_FUNCS:
if (!is_func_exist(funcs, fn_name, *nr_funcs, &fid))
*nr_funcs = *nr_funcs + 1;
break;
case OP_ADD_FUNCS:
if (!is_func_exist(funcs, fn_name, *nr_funcs, &fid))
funcs[i].name = fn_name;
break;
case OP_COUNT_NR_FUNC_GRPS:
if (is_func_exist(funcs, fn_name, *nr_funcs, &fid))
funcs[fid].nr_groups++;
break;
case OP_ADD_FUNC_GRPS:
if (is_func_exist(funcs, fn_name, *nr_funcs, &fid)) {
for (j = 0; j < funcs[fid].nr_groups; j++)
if (!funcs[fid].groups[j])
break;
funcs[fid].groups[j] = prop->value;
}
break;
default:
return -EINVAL;
}
i++;
}
return 0;
}
static int eqbr_build_functions(struct eqbr_pinctrl_drv_data *drvdata)
{
struct device *dev = drvdata->dev;
struct eqbr_pmx_func *funcs = NULL;
unsigned int nr_funcs = 0;
int i, ret;
ret = funcs_utils(dev, funcs, &nr_funcs, OP_COUNT_NR_FUNCS);
if (ret)
return ret;
funcs = devm_kcalloc(dev, nr_funcs, sizeof(*funcs), GFP_KERNEL);
if (!funcs)
return -ENOMEM;
ret = funcs_utils(dev, funcs, &nr_funcs, OP_ADD_FUNCS);
if (ret)
return ret;
ret = funcs_utils(dev, funcs, &nr_funcs, OP_COUNT_NR_FUNC_GRPS);
if (ret)
return ret;
for (i = 0; i < nr_funcs; i++) {
if (!funcs[i].nr_groups)
continue;
funcs[i].groups = devm_kcalloc(dev, funcs[i].nr_groups,
sizeof(*(funcs[i].groups)),
GFP_KERNEL);
if (!funcs[i].groups)
return -ENOMEM;
}
ret = funcs_utils(dev, funcs, &nr_funcs, OP_ADD_FUNC_GRPS);
if (ret)
return ret;
for (i = 0; i < nr_funcs; i++) {
ret = pinmux_generic_add_function(drvdata->pctl_dev,
funcs[i].name,
funcs[i].groups,
funcs[i].nr_groups,
drvdata);
if (ret < 0) {
dev_err(dev, "Failed to register function %s\n",
funcs[i].name);
return ret;
}
}
return 0;
}
static int eqbr_build_groups(struct eqbr_pinctrl_drv_data *drvdata)
{
struct device *dev = drvdata->dev;
struct device_node *node = dev->of_node;
unsigned int *pinmux, pin_id, pinmux_id;
struct group_desc group;
struct device_node *np;
struct property *prop;
int j, err;
for_each_child_of_node(node, np) {
prop = of_find_property(np, "groups", NULL);
if (!prop)
continue;
group.num_pins = of_property_count_u32_elems(np, "pins");
if (group.num_pins < 0) {
dev_err(dev, "No pins in the group: %s\n", prop->name);
return -EINVAL;
}
group.name = prop->value;
group.pins = devm_kcalloc(dev, group.num_pins,
sizeof(*(group.pins)), GFP_KERNEL);
if (!group.pins)
return -ENOMEM;
pinmux = devm_kcalloc(dev, group.num_pins, sizeof(*pinmux),
GFP_KERNEL);
if (!pinmux)
return -ENOMEM;
for (j = 0; j < group.num_pins; j++) {
if (of_property_read_u32_index(np, "pins", j, &pin_id)) {
dev_err(dev, "Group %s: Read intel pins id failed\n",
group.name);
return -EINVAL;
}
if (pin_id >= drvdata->pctl_desc.npins) {
dev_err(dev, "Group %s: Invalid pin ID, idx: %d, pin %u\n",
group.name, j, pin_id);
return -EINVAL;
}
group.pins[j] = pin_id;
if (of_property_read_u32_index(np, "pinmux", j, &pinmux_id)) {
dev_err(dev, "Group %s: Read intel pinmux id failed\n",
group.name);
return -EINVAL;
}
pinmux[j] = pinmux_id;
}
err = pinctrl_generic_add_group(drvdata->pctl_dev, group.name,
group.pins, group.num_pins,
pinmux);
if (err < 0) {
dev_err(dev, "Failed to register group %s\n", group.name);
return err;
}
memset(&group, 0, sizeof(group));
pinmux = NULL;
}
return 0;
}
static int pinctrl_reg(struct eqbr_pinctrl_drv_data *drvdata)
{
struct pinctrl_desc *pctl_desc;
struct pinctrl_pin_desc *pdesc;
struct device *dev;
unsigned int nr_pins;
char *pin_names;
int i, ret;
dev = drvdata->dev;
pctl_desc = &drvdata->pctl_desc;
pctl_desc->name = "eqbr-pinctrl";
pctl_desc->owner = THIS_MODULE;
pctl_desc->pctlops = &eqbr_pctl_ops;
pctl_desc->pmxops = &eqbr_pinmux_ops;
pctl_desc->confops = &eqbr_pinconf_ops;
raw_spin_lock_init(&drvdata->lock);
for (i = 0, nr_pins = 0; i < drvdata->nr_banks; i++)
nr_pins += drvdata->pin_banks[i].nr_pins;
pdesc = devm_kcalloc(dev, nr_pins, sizeof(*pdesc), GFP_KERNEL);
if (!pdesc)
return -ENOMEM;
pin_names = devm_kcalloc(dev, nr_pins, PIN_NAME_LEN, GFP_KERNEL);
if (!pin_names)
return -ENOMEM;
for (i = 0; i < nr_pins; i++) {
sprintf(pin_names, PIN_NAME_FMT, i);
pdesc[i].number = i;
pdesc[i].name = pin_names;
pin_names += PIN_NAME_LEN;
}
pctl_desc->pins = pdesc;
pctl_desc->npins = nr_pins;
dev_dbg(dev, "pinctrl total pin number: %u\n", nr_pins);
ret = devm_pinctrl_register_and_init(dev, pctl_desc, drvdata,
&drvdata->pctl_dev);
if (ret)
return ret;
ret = eqbr_build_groups(drvdata);
if (ret) {
dev_err(dev, "Failed to build groups\n");
return ret;
}
ret = eqbr_build_functions(drvdata);
if (ret) {
dev_err(dev, "Failed to build groups\n");
return ret;
}
return pinctrl_enable(drvdata->pctl_dev);
}
static int pinbank_init(struct device_node *np,
struct eqbr_pinctrl_drv_data *drvdata,
struct eqbr_pin_bank *bank, unsigned int id)
{
struct device *dev = drvdata->dev;
struct of_phandle_args spec;
int ret;
bank->membase = drvdata->membase + id * PAD_REG_OFF;
ret = of_parse_phandle_with_fixed_args(np, "gpio-ranges", 3, 0, &spec);
if (ret) {
dev_err(dev, "gpio-range not available!\n");
return ret;
}
bank->pin_base = spec.args[1];
bank->nr_pins = spec.args[2];
bank->aval_pinmap = readl(bank->membase + REG_AVAIL);
bank->id = id;
dev_dbg(dev, "pinbank id: %d, reg: %px, pinbase: %u, pin number: %u, pinmap: 0x%x\n",
id, bank->membase, bank->pin_base,
bank->nr_pins, bank->aval_pinmap);
return ret;
}
static int pinbank_probe(struct eqbr_pinctrl_drv_data *drvdata)
{
struct device *dev = drvdata->dev;
struct device_node *np_gpio;
struct eqbr_gpio_ctrl *gctrls;
struct eqbr_pin_bank *banks;
int i, nr_gpio;
/* Count gpio bank number */
nr_gpio = 0;
for_each_node_by_name(np_gpio, "gpio") {
if (of_device_is_available(np_gpio))
nr_gpio++;
}
if (!nr_gpio) {
dev_err(dev, "NO pin bank available!\n");
return -ENODEV;
}
/* Count pin bank number and gpio controller number */
banks = devm_kcalloc(dev, nr_gpio, sizeof(*banks), GFP_KERNEL);
if (!banks)
return -ENOMEM;
gctrls = devm_kcalloc(dev, nr_gpio, sizeof(*gctrls), GFP_KERNEL);
if (!gctrls)
return -ENOMEM;
dev_dbg(dev, "found %d gpio controller!\n", nr_gpio);
/* Initialize Pin bank */
i = 0;
for_each_node_by_name(np_gpio, "gpio") {
if (!of_device_is_available(np_gpio))
continue;
pinbank_init(np_gpio, drvdata, banks + i, i);
gctrls[i].node = np_gpio;
gctrls[i].bank = banks + i;
i++;
}
drvdata->pin_banks = banks;
drvdata->nr_banks = nr_gpio;
drvdata->gpio_ctrls = gctrls;
drvdata->nr_gpio_ctrls = nr_gpio;
return 0;
}
static int eqbr_pinctrl_probe(struct platform_device *pdev)
{
struct eqbr_pinctrl_drv_data *drvdata;
struct device *dev = &pdev->dev;
int ret;
drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
if (!drvdata)
return -ENOMEM;
drvdata->dev = dev;
drvdata->membase = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(drvdata->membase))
return PTR_ERR(drvdata->membase);
ret = pinbank_probe(drvdata);
if (ret)
return ret;
ret = pinctrl_reg(drvdata);
if (ret)
return ret;
ret = gpiolib_reg(drvdata);
if (ret)
return ret;
platform_set_drvdata(pdev, drvdata);
return 0;
}
static const struct of_device_id eqbr_pinctrl_dt_match[] = {
{ .compatible = "intel,lgm-io" },
{}
};
static struct platform_driver eqbr_pinctrl_driver = {
.probe = eqbr_pinctrl_probe,
.driver = {
.name = "eqbr-pinctrl",
.of_match_table = eqbr_pinctrl_dt_match,
},
};
module_platform_driver(eqbr_pinctrl_driver);
MODULE_AUTHOR("Zhu Yixin <yixin.zhu@intel.com>, Rahul Tanwar <rahul.tanwar@intel.com>");
MODULE_DESCRIPTION("Pinctrl Driver for LGM SoC (Equilibrium)");
MODULE_LICENSE("GPL v2");
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