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Message-Id: <65898579e78b4b3bb5db9ddc884a818046c1eb4c.1568274587.git.rahul.tanwar@linux.intel.com>
Date: Thu, 12 Sep 2019 15:59:10 +0800
From: Rahul Tanwar <rahul.tanwar@...ux.intel.com>
To: linus.walleij@...aro.org, robh+dt@...nel.org, mark.rutland@....com
Cc: linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
devicetree@...r.kernel.org, robh@...nel.org,
andriy.shevchenko@...el.com, qi-ming.wu@...el.com,
yixin.zhu@...ux.intel.com, cheol.yong.kim@...el.com,
Rahul Tanwar <rahul.tanwar@...ux.intel.com>
Subject: [PATCH v1 1/2] pinctrl: Add pinmux & GPIO controller driver for new SoC
Intel Lightning Mountain SoC has a pinmux controller & GPIO controller IP
which controls pin multiplexing & configuration including GPIO functions
selection & GPIO attributes configuration. Add GPIO & pin control framework
based driver for this IP.
Signed-off-by: Rahul Tanwar <rahul.tanwar@...ux.intel.com>
---
drivers/pinctrl/Kconfig | 13 +
drivers/pinctrl/Makefile | 1 +
drivers/pinctrl/pinctrl-equilibrium.c | 1377 +++++++++++++++++++++++++++++++++
drivers/pinctrl/pinctrl-equilibrium.h | 194 +++++
4 files changed, 1585 insertions(+)
create mode 100644 drivers/pinctrl/pinctrl-equilibrium.c
create mode 100644 drivers/pinctrl/pinctrl-equilibrium.h
diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig
index b372419d61f2..99f20099b8eb 100644
--- a/drivers/pinctrl/Kconfig
+++ b/drivers/pinctrl/Kconfig
@@ -420,4 +420,17 @@ config PINCTRL_TB10X
depends on OF && ARC_PLAT_TB10X
select GPIOLIB
+config PINCTRL_EQUILIBRIUM
+ tristate "Generic pinctrl and GPIO driver for Intel Lightning Mountain SoC"
+ select PINMUX
+ select PINCONF
+ select GPIOLIB
+ select GPIOLIB_IRQCHIP
+ help
+ Equilibrium pinctrl driver is a pinctrl & GPIO driver for Intel Lightning
+ Mountain network processor SoC that supports both the linux GPIO and pin
+ control frameworks. It provides interfaces to setup pinmux, assign desired
+ pin functions, configure GPIO attributes for LGM SoC pins. Pinmux and
+ pinconf settings are retrieved from device tree.
+
endif
diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile
index ac537fdbc998..879f312bfb75 100644
--- a/drivers/pinctrl/Makefile
+++ b/drivers/pinctrl/Makefile
@@ -46,6 +46,7 @@ obj-$(CONFIG_PINCTRL_ZYNQ) += pinctrl-zynq.o
obj-$(CONFIG_PINCTRL_INGENIC) += pinctrl-ingenic.o
obj-$(CONFIG_PINCTRL_RK805) += pinctrl-rk805.o
obj-$(CONFIG_PINCTRL_OCELOT) += pinctrl-ocelot.o
+obj-$(CONFIG_PINCTRL_EQUILIBRIUM) += pinctrl-equilibrium.o
obj-y += actions/
obj-$(CONFIG_ARCH_ASPEED) += aspeed/
diff --git a/drivers/pinctrl/pinctrl-equilibrium.c b/drivers/pinctrl/pinctrl-equilibrium.c
new file mode 100644
index 000000000000..abe522cdffbe
--- /dev/null
+++ b/drivers/pinctrl/pinctrl-equilibrium.c
@@ -0,0 +1,1377 @@
+// 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/pinmux.h>
+#include <linux/pinctrl/consumer.h>
+#include <linux/pinctrl/machine.h>
+#include <linux/platform_device.h>
+
+#include <dt-bindings/pinctrl/intel,equilibrium.h>
+#include "pinctrl-equilibrium.h"
+
+#define PIN_NAME_FMT "io-%d"
+#define PIN_NAME_LEN 10
+#define PAD_REG_OFF 0x100
+
+static const struct pin_config pin_cfg_type[] = {
+ {"intel,pullup", PINCONF_TYPE_PULL_UP},
+ {"intel,pulldown", PINCONF_TYPE_PULL_DOWN},
+ {"intel,drive-current", PINCONF_TYPE_DRIVE_CURRENT},
+ {"intel,slew-rate", PINCONF_TYPE_SLEW_RATE},
+ {"intel,open-drain", PINCONF_TYPE_OPEN_DRAIN},
+ {"intel,output", PINCONF_TYPE_OUTPUT},
+};
+
+static inline void eqbr_set_val(void __iomem *addr, u32 offset,
+ u32 mask, u32 set, raw_spinlock_t *lock)
+{
+ u32 val;
+ unsigned long flags;
+
+ raw_spin_lock_irqsave(lock, flags);
+ val = readl(addr) & ~(mask << offset);
+ writel(val | ((set & mask) << offset), addr);
+ raw_spin_unlock_irqrestore(lock, flags);
+}
+
+static int eqbr_irq_map(struct irq_domain *d,
+ unsigned int virq, irq_hw_number_t hw)
+{
+ struct intel_gpio_desc *desc = d->host_data;
+
+ irq_set_chip_data(virq, desc);
+ irq_set_chip_and_handler(virq, desc->ic, handle_level_irq);
+ return 0;
+}
+
+static const struct irq_domain_ops gc_irqdomain_ops = {
+ .map = eqbr_irq_map,
+ .xlate = irq_domain_xlate_twocell,
+};
+
+/* get direction 0 is out, 1 is in */
+static int intel_eqbr_gpio_get_dir(struct gpio_chip *gc, unsigned int offset)
+{
+ struct intel_gpio_desc *desc = gpiochip_get_data(gc);
+
+ return !(readl(desc->membase + GPIO_DIR) & BIT(offset));
+}
+
+static int intel_eqbr_gpio_dir_input(struct gpio_chip *gc, unsigned int offset)
+{
+ struct intel_gpio_desc *desc = gpiochip_get_data(gc);
+
+ writel(BIT(offset), desc->membase + GPIO_DIRCLR);
+ return 0;
+}
+
+static int intel_eqbr_gpio_dir_output(struct gpio_chip *gc, unsigned int offset,
+ int value)
+{
+ struct intel_gpio_desc *desc = gpiochip_get_data(gc);
+
+ if (value)
+ writel(BIT(offset), desc->membase + GPIO_OUTSET);
+ else
+ writel(BIT(offset), desc->membase + GPIO_OUTCLR);
+
+ writel(BIT(offset), desc->membase + GPIO_DIRSET);
+ return 0;
+}
+
+static void intel_eqbr_gpio_set(struct gpio_chip *gc,
+ unsigned int offset, int dir)
+{
+ struct intel_gpio_desc *desc = gpiochip_get_data(gc);
+
+ if (dir == GPIO_DIR_IN)
+ writel(BIT(offset), desc->membase + GPIO_DIRCLR);
+ else
+ writel(BIT(offset), desc->membase + GPIO_DIRSET);
+}
+
+static int intel_eqbr_gpio_get(struct gpio_chip *gc, unsigned int offset)
+{
+ struct intel_gpio_desc *desc = gpiochip_get_data(gc);
+ int dir, val;
+
+ dir = !(intel_eqbr_gpio_get_dir(gc, offset));
+
+ if (dir == GPIO_DIR_IN)
+ val = readl(desc->membase + GPIO_IN);
+ else
+ val = readl(desc->membase + GPIO_OUT);
+
+ val &= BIT(offset);
+ return !!val;
+}
+
+static int intel_eqbr_gpio_to_irq(struct gpio_chip *gc, unsigned int offset)
+{
+ struct intel_gpio_desc *desc = gpiochip_get_data(gc);
+ unsigned int virq;
+
+ if (!desc->irq_domain)
+ return -ENODEV;
+
+ virq = irq_find_mapping(desc->irq_domain, offset);
+ if (virq)
+ return virq;
+ else
+ return irq_create_mapping(desc->irq_domain, offset);
+}
+
+static int gpiochip_setup(struct device *dev, struct intel_gpio_desc *desc)
+{
+ struct gpio_chip *gc;
+ int ret;
+
+ gc = &desc->chip;
+ gc->owner = THIS_MODULE;
+ gc->request = gpiochip_generic_request;
+ gc->free = gpiochip_generic_free;
+ gc->get_direction = intel_eqbr_gpio_get_dir;
+ gc->direction_input = intel_eqbr_gpio_dir_input;
+ gc->direction_output = intel_eqbr_gpio_dir_output;
+ gc->get = intel_eqbr_gpio_get;
+ gc->set = intel_eqbr_gpio_set;
+ gc->base = -1; /* desc->bank->pin_base; */
+ gc->ngpio = desc->bank->nr_pins;
+ gc->label = desc->name;
+ gc->to_irq = intel_eqbr_gpio_to_irq;
+ gc->of_node = desc->node;
+ gc->parent = dev;
+
+ ret = devm_gpiochip_add_data(dev, gc, desc);
+ if (ret)
+ dev_err(dev, "failed to register gpiochip: %s, err: %d\n",
+ gc->label, ret);
+
+ return ret;
+}
+
+static void eqbr_gpio_disable_irq(struct irq_data *d)
+{
+ unsigned int offset = irqd_to_hwirq(d);
+ struct intel_gpio_desc *desc = irq_data_get_irq_chip_data(d);
+
+ writel(BIT(offset), desc->membase + GPIO_IRNENCLR);
+}
+
+static void eqbr_gpio_enable_irq(struct irq_data *d)
+{
+ unsigned int offset = irqd_to_hwirq(d);
+ struct intel_gpio_desc *desc = irq_data_get_irq_chip_data(d);
+
+ writel(BIT(offset), desc->membase + GPIO_IRNRNSET);
+}
+
+static void eqbr_gpio_ack_irq(struct irq_data *d)
+{
+ unsigned int offset = irqd_to_hwirq(d);
+ struct intel_gpio_desc *desc = irq_data_get_irq_chip_data(d);
+
+ writel(BIT(offset), desc->membase + GPIO_IRNCR);
+}
+
+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 intel_gpio_desc *desc,
+ unsigned int offset)
+{
+ unsigned long flags;
+
+ raw_spin_lock_irqsave(&desc->lock, flags);
+ eqbr_cfg_bit(desc->membase + GPIO_IRNCFG, offset, type->trig_type);
+ eqbr_cfg_bit(desc->membase + GPIO_EXINTCR1, offset, type->trig_type);
+ eqbr_cfg_bit(desc->membase + GPIO_EXINTCR0, offset, type->logic_type);
+ raw_spin_unlock_irqrestore(&desc->lock, flags);
+
+ return 0;
+}
+
+static int eqbr_gpio_set_irq_type(struct irq_data *d, unsigned int type)
+{
+ unsigned int offset = irqd_to_hwirq(d);
+ struct intel_gpio_desc *desc = irq_data_get_irq_chip_data(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, desc, 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 int eqbr_gpio_irq_req_res(struct irq_data *d)
+{
+ struct intel_gpio_desc *desc = irq_data_get_irq_chip_data(d);
+ unsigned int offset;
+ int ret;
+
+ offset = irqd_to_hwirq(d);
+
+ /* gpio must be set as input */
+ intel_eqbr_gpio_dir_input(&desc->chip, offset);
+ ret = gpiochip_lock_as_irq(&desc->chip, offset);
+ if (ret) {
+ pr_err("%s: Failed to lock gpio %u as irq!\n",
+ desc->name, offset);
+ return ret;
+ }
+ eqbr_gpio_enable_irq(d);
+
+ return 0;
+}
+
+static void eqbr_gpio_irq_rel_res(struct irq_data *d)
+{
+ struct intel_gpio_desc *desc = irq_data_get_irq_chip_data(d);
+ unsigned int offset = irqd_to_hwirq(d);
+
+ eqbr_gpio_disable_irq(d);
+ gpiochip_unlock_as_irq(&desc->chip, offset);
+}
+
+static struct irq_chip eqbr_irq_chip = {
+ .name = "gpio_irq",
+ .irq_mask = eqbr_gpio_disable_irq,
+ .irq_unmask = eqbr_gpio_enable_irq,
+ .irq_ack = eqbr_gpio_ack_irq,
+ .irq_mask_ack = eqbr_gpio_mask_ack_irq,
+ .irq_set_type = eqbr_gpio_set_irq_type,
+ .irq_request_resources = eqbr_gpio_irq_req_res,
+ .irq_release_resources = eqbr_gpio_irq_rel_res,
+};
+
+static void eqbr_irq_handler(struct irq_desc *desc)
+{
+ struct intel_gpio_desc *gc;
+ struct irq_chip *ic;
+ u32 pins, offset;
+ unsigned int virq;
+
+ gc = irq_desc_get_handler_data(desc);
+ ic = irq_desc_get_chip(desc);
+
+ chained_irq_enter(ic, desc);
+ pins = readl(gc->membase + GPIO_IRNCR);
+
+ for_each_set_bit(offset, (unsigned long *)&pins, gc->bank->nr_pins) {
+ virq = irq_linear_revmap(gc->irq_domain, offset);
+ if (!virq)
+ pr_err("gc[%s]:pin:%d irq not registered!\n",
+ gc->name, offset);
+ else
+ generic_handle_irq(virq);
+ }
+ chained_irq_exit(ic, desc);
+}
+
+static int irqchip_setup(struct device *dev, struct intel_gpio_desc *desc)
+{
+ struct device_node *np = desc->node;
+
+ if (!of_property_read_bool(np, "interrupt-controller")) {
+ dev_info(dev, "gc %s: doesn't act as interrupt controller!\n",
+ desc->name);
+ return 0;
+ }
+
+ desc->irq_domain = irq_domain_add_linear(desc->node,
+ desc->bank->nr_pins,
+ &gc_irqdomain_ops, desc);
+ if (!desc->irq_domain) {
+ dev_err(dev, "%s: failed to create gpio irq domain!\n",
+ desc->name);
+ return -ENODEV;
+ }
+ irq_set_chained_handler_and_data(desc->virq, eqbr_irq_handler, desc);
+ desc->ic = &eqbr_irq_chip;
+
+ return 0;
+}
+
+static int gpiolib_reg(struct intel_pinctrl_drv_data *drvdata)
+{
+ struct device_node *np;
+ struct intel_gpio_desc *desc;
+ struct device *dev;
+ int i, ret;
+ char name[32];
+ struct resource res;
+
+ dev = drvdata->dev;
+ for (i = 0; i < drvdata->nr_gpio_descs; i++) {
+ desc = drvdata->gpio_desc + i;
+ np = desc->node;
+ sprintf(name, "gpiochip%d", i);
+ desc->name = devm_kmemdup(dev, name,
+ strlen(name) + 1, GFP_KERNEL);
+ if (!desc->name)
+ return -ENOMEM;
+ if (of_address_to_resource(np, 0, &res)) {
+ dev_err(dev, "Failed to get GPIO register addrss\n");
+ return -ENXIO;
+ }
+ desc->membase = devm_ioremap_resource(dev, &res);
+ if (IS_ERR(desc->membase)) {
+ dev_err(dev, "ioremap fail\n");
+ return PTR_ERR(desc->membase);
+ }
+ dev_dbg(dev, "gpio resource: %pr\n", &res);
+ dev_dbg(dev, "gpiochip membase: %px\n", desc->membase);
+
+ desc->virq = irq_of_parse_and_map(np, 0);
+ if (!desc->virq) {
+ dev_err(dev, "%s: failed to parse and map irq\n",
+ name);
+ return -ENXIO;
+ }
+ raw_spin_lock_init(&desc->lock);
+
+ ret = gpiochip_setup(dev, desc);
+ if (ret)
+ return ret;
+ ret = irqchip_setup(dev, desc);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int eqbr_get_groups_count(struct pinctrl_dev *pctldev)
+{
+ struct intel_pinctrl_drv_data *pctl = pinctrl_dev_get_drvdata(pctldev);
+
+ return pctl->nr_grps;
+}
+
+static const char *eqbr_get_group_name(struct pinctrl_dev *pctldev,
+ unsigned int selector)
+{
+ struct intel_pinctrl_drv_data *pctl = pinctrl_dev_get_drvdata(pctldev);
+
+ return pctl->pin_grps[selector].name;
+}
+
+static int eqbr_get_group_pins(struct pinctrl_dev *pctldev,
+ unsigned int selector,
+ const unsigned int **pins,
+ unsigned int *num_pins)
+{
+ struct intel_pinctrl_drv_data *pctl = pinctrl_dev_get_drvdata(pctldev);
+
+ *pins = pctl->pin_grps[selector].pins;
+ *num_pins = pctl->pin_grps[selector].nr_pins;
+
+ return 0;
+}
+
+static int parse_mux_info(struct device_node *np)
+{
+ int ret;
+ const char *str;
+
+ ret = of_property_read_string(np, "intel,function", &str);
+ if (ret)
+ return -ENODEV;
+ ret = of_property_read_string(np, "intel,groups", &str);
+ if (ret)
+ return -ENODEV;
+
+ return ret;
+}
+
+static int add_config(struct intel_pinctrl_drv_data *drvdata,
+ unsigned long **confs, unsigned int *nr_conf,
+ unsigned long pinconf)
+{
+ unsigned long *configs;
+ struct device *dev = drvdata->dev;
+ unsigned int num_conf = *nr_conf + 1;
+
+ if (!(*nr_conf)) {
+ configs = devm_kcalloc(dev, 1, sizeof(pinconf), GFP_KERNEL);
+ if (!configs)
+ return -ENOMEM;
+ } else {
+ configs = devm_kmemdup(dev, *confs,
+ num_conf * sizeof(pinconf), GFP_KERNEL);
+ if (!configs)
+ return -ENOMEM;
+ devm_kfree(dev, *confs);
+ }
+
+ configs[num_conf - 1] = pinconf;
+ *confs = configs;
+ *nr_conf = num_conf;
+
+ return 0;
+}
+
+static void eqbr_add_map_mux(struct device_node *np, struct pinctrl_map **map,
+ int *index)
+{
+ int idx = *index;
+ const char *function, *group;
+
+ of_property_read_string(np, "intel,function", &function);
+ of_property_read_string(np, "intel,groups", &group);
+
+ (*map)[idx].type = PIN_MAP_TYPE_MUX_GROUP;
+ (*map)[idx].data.mux.group = group;
+ (*map)[idx].data.mux.function = function;
+ *index = idx + 1;
+}
+
+static void eqbr_add_map_configs(struct device_node *np,
+ struct pinctrl_map **map, int *index,
+ unsigned long *configs, unsigned int nr_config)
+{
+ int idx = *index;
+ const char *group;
+
+ of_property_read_string(np, "intel,groups", &group);
+ (*map)[idx].type = PIN_MAP_TYPE_CONFIGS_GROUP;
+ (*map)[idx].data.configs.group_or_pin = group;
+ (*map)[idx].data.configs.configs = configs;
+ (*map)[idx].data.configs.num_configs = nr_config;
+ *index = idx + 1;
+}
+
+static int eqbr_dt_node_to_map(struct pinctrl_dev *pctldev,
+ struct device_node *np,
+ struct pinctrl_map **map, unsigned int *num_maps)
+{
+ struct intel_pinctrl_drv_data *pctl = pinctrl_dev_get_drvdata(pctldev);
+ unsigned int map_cnt, nr_config;
+ unsigned long pin_conf, *configs = NULL;
+ int i, ret;
+ unsigned int val;
+ bool func = false;
+
+ *map = NULL;
+ *num_maps = map_cnt = nr_config = 0;
+
+ ret = parse_mux_info(np);
+ if (!ret) {
+ map_cnt++;
+ func = true;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(pin_cfg_type); i++) {
+ ret = of_property_read_u32(np, pin_cfg_type[i].property, &val);
+ if (!ret) {
+ pin_conf = PINCONF_PACK(pin_cfg_type[i].type, val);
+ ret = add_config(pctl, &configs, &nr_config, pin_conf);
+ if (ret)
+ return ret;
+ }
+ }
+
+ /**
+ * Create pinctrl_map for each groups, per group per entry.
+ * Create pinctrl_map for pin config, per group per entry.
+ */
+ if (nr_config)
+ map_cnt++;
+
+ *map = devm_kcalloc(pctl->dev, map_cnt, sizeof(**map), GFP_KERNEL);
+ if (!*map)
+ return -ENOMEM;
+
+ i = 0;
+ if (func)
+ eqbr_add_map_mux(np, map, &i);
+ if (nr_config)
+ eqbr_add_map_configs(np, map, &i, configs, nr_config);
+
+ *num_maps = map_cnt;
+
+ return 0;
+}
+
+static inline struct intel_pin_bank
+*find_pinbank_via_pin(struct intel_pinctrl_drv_data *pctl, unsigned int pin)
+{
+ int i;
+ struct intel_pin_bank *bank;
+
+ 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 void eqbr_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s,
+ unsigned int offset)
+{
+ struct intel_pinctrl_drv_data *pctl = pinctrl_dev_get_drvdata(pctldev);
+ struct intel_pin_bank *bank;
+ const struct intel_pin_group *group;
+ unsigned int pin = offset;
+ int i, j;
+
+ bank = find_pinbank_via_pin(pctl, pin);
+ offset = pin - bank->pin_base;
+
+ seq_printf(s, "pin mux: %u\n", readl(bank->membase + (offset << 2)));
+
+ for (i = 0; i < pctl->nr_grps; i++) {
+ group = &pctl->pin_grps[i];
+ for (j = 0; j < group->nr_pins; j++) {
+ if (pin == group->pins[j]) {
+ seq_printf(s, "group name: %s, mux: %u\n",
+ group->name, group->pmx);
+ break;
+ }
+ }
+ }
+}
+
+static void eqbr_dt_free_map(struct pinctrl_dev *pctldev,
+ struct pinctrl_map *map, unsigned int num_maps)
+{
+ struct intel_pinctrl_drv_data *pctl = pinctrl_dev_get_drvdata(pctldev);
+ int i;
+
+ for (i = 0; i < num_maps; i++)
+ if (map[i].type == PIN_MAP_TYPE_CONFIGS_GROUP)
+ devm_kfree(pctl->dev, map[i].data.configs.configs);
+ devm_kfree(pctl->dev, map);
+}
+
+static const struct pinctrl_ops eqbr_pctl_ops = {
+ .get_groups_count = eqbr_get_groups_count,
+ .get_group_name = eqbr_get_group_name,
+ .get_group_pins = eqbr_get_group_pins,
+ .pin_dbg_show = eqbr_pin_dbg_show,
+ .dt_node_to_map = eqbr_dt_node_to_map,
+ .dt_free_map = eqbr_dt_free_map,
+};
+
+static int eqbr_pinmux_get_func_count(struct pinctrl_dev *pctldev)
+{
+ struct intel_pinctrl_drv_data *pctl = pinctrl_dev_get_drvdata(pctldev);
+
+ return pctl->nr_funcs;
+}
+
+static const char *eqbr_pinmux_get_fname(struct pinctrl_dev *pctldev,
+ unsigned int selector)
+{
+ struct intel_pinctrl_drv_data *pctl = pinctrl_dev_get_drvdata(pctldev);
+
+ return pctl->pmx_funcs[selector].name;
+}
+
+static int eqbr_pinmux_get_groups(struct pinctrl_dev *pctldev,
+ unsigned int selector,
+ const char * const **groups,
+ unsigned int *num_groups)
+{
+ struct intel_pinctrl_drv_data *pctl = pinctrl_dev_get_drvdata(pctldev);
+
+ *groups = pctl->pmx_funcs[selector].groups;
+ *num_groups = pctl->pmx_funcs[selector].nr_groups;
+ return 0;
+}
+
+static int eqbr_set_pin_mux(struct intel_pinctrl_drv_data *pctl,
+ unsigned int pmx, unsigned int pin)
+{
+ void __iomem *mem;
+ struct intel_pin_bank *bank;
+ unsigned int offset;
+
+ 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;
+ }
+
+ writel(pmx, mem + (offset << 2));
+ return 0;
+}
+
+static int eqbr_pinmux_set_mux(struct pinctrl_dev *pctldev,
+ unsigned int selector, unsigned int group)
+{
+ struct intel_pinctrl_drv_data *pctl = pinctrl_dev_get_drvdata(pctldev);
+ const struct intel_pin_group *pin_group = NULL;
+ int i;
+
+ pin_group = &pctl->pin_grps[group];
+
+ for (i = 0; i < pin_group->nr_pins; i++)
+ eqbr_set_pin_mux(pctl, pin_group->pmx, pin_group->pins[i]);
+
+ return 0;
+}
+
+static int eqbr_pinmux_gpio_request(struct pinctrl_dev *pctldev,
+ struct pinctrl_gpio_range *range,
+ unsigned int pin)
+{
+ struct intel_pinctrl_drv_data *pctl = pinctrl_dev_get_drvdata(pctldev);
+
+ return eqbr_set_pin_mux(pctl, PINMUX_GPIO, pin);
+}
+
+static const struct pinmux_ops eqbr_pinmux_ops = {
+ .get_functions_count = eqbr_pinmux_get_func_count,
+ .get_function_name = eqbr_pinmux_get_fname,
+ .get_function_groups = eqbr_pinmux_get_groups,
+ .set_mux = eqbr_pinmux_set_mux,
+ .gpio_request_enable = eqbr_pinmux_gpio_request,
+ .strict = 1,
+};
+
+static void set_drv_cur(void __iomem *mem, unsigned int offset,
+ unsigned int set, raw_spinlock_t *lock)
+{
+ unsigned int idx = offset; /* 16 pin per register*/
+ unsigned int reg;
+
+ idx = idx / DRV_CUR_PINS;
+ offset %= DRV_CUR_PINS;
+ reg = REG_DRCC(idx);
+ eqbr_set_val(mem + REG_DRCC(idx), offset * 2,
+ 0x3, set, lock);
+}
+
+static int get_drv_cur(void __iomem *mem, unsigned int offset)
+{
+ unsigned int idx = offset; /* 0-15, 16-31 per register*/
+ unsigned int val;
+
+ idx = idx / DRV_CUR_PINS;
+ val = readl(mem + REG_DRCC(idx));
+ offset %= DRV_CUR_PINS;
+ val = PARSE_DRV_CURRENT(val, offset);
+
+ return val;
+}
+
+static struct intel_gpio_desc
+*get_gpio_desc_via_bank(struct intel_pinctrl_drv_data *pctl,
+ struct intel_pin_bank *bank)
+{
+ int i;
+
+ for (i = 0; i < pctl->nr_gpio_descs; i++) {
+ if (pctl->gpio_desc[i].bank == bank)
+ return &pctl->gpio_desc[i];
+ }
+
+ return NULL;
+}
+
+static int eqbr_pinconf_get(struct pinctrl_dev *pctldev, unsigned int pin,
+ unsigned long *config)
+{
+ struct intel_pinctrl_drv_data *pctl;
+ struct intel_pin_bank *bank;
+ unsigned int offset;
+ void __iomem *mem;
+ enum pincfg_type type = PINCONF_UNPACK_TYPE(*config);
+ struct intel_gpio_desc *gpio;
+ u32 val;
+
+ pctl = pinctrl_dev_get_drvdata(pctldev);
+ 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;
+ }
+
+ switch (type) {
+ case PINCONF_TYPE_PULL_UP:
+ val = !!(readl(mem + REG_PUEN) & BIT(offset));
+ break;
+ case PINCONF_TYPE_PULL_DOWN:
+ val = !!(readl(mem + REG_PDEN) & BIT(offset));
+ break;
+ case PINCONF_TYPE_OPEN_DRAIN:
+ val = !!(readl(mem + REG_OD) & BIT(offset));
+ break;
+ case PINCONF_TYPE_DRIVE_CURRENT:
+ val = get_drv_cur(mem, offset);
+ break;
+ case PINCONF_TYPE_SLEW_RATE:
+ val = !!(readl(mem + REG_SRC) & BIT(offset));
+ break;
+ case PINCONF_TYPE_OUTPUT:
+ gpio = get_gpio_desc_via_bank(pctl, bank);
+ if (!gpio) {
+ dev_err(pctl->dev, "Failed to find gpio via bank pinbase: %u, pin: %u\n",
+ bank->pin_base, pin);
+ return -ENODEV;
+ }
+ val = !!(readl(gpio->membase + GPIO_DIR) & BIT(offset));
+ break;
+ default:
+ dev_err(pctl->dev, "PINCONF type error: %u\n", type);
+ return -ENODEV;
+ }
+
+ *config = PINCONF_PACK(type, val);
+
+ return 0;
+}
+
+static int eqbr_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
+ unsigned long *configs, unsigned int num_configs)
+{
+ struct intel_pinctrl_drv_data *pctl;
+ enum pincfg_type type;
+ unsigned int val, offset;
+ struct intel_pin_bank *bank;
+ struct intel_gpio_desc *gpio;
+ void __iomem *mem;
+ int i;
+
+ pctl = pinctrl_dev_get_drvdata(pctldev);
+ for (i = 0; i < num_configs; i++) {
+ type = PINCONF_UNPACK_TYPE(configs[i]);
+ val = PINCONF_UNPACK_SET(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 (type) {
+ case PINCONF_TYPE_PULL_UP:
+ eqbr_set_val(mem + REG_PUEN, offset,
+ 1, val, &pctl->lock);
+ break;
+ case PINCONF_TYPE_PULL_DOWN:
+ eqbr_set_val(mem + REG_PDEN, offset,
+ 1, val, &pctl->lock);
+ break;
+ case PINCONF_TYPE_OPEN_DRAIN:
+ eqbr_set_val(mem + REG_OD, offset,
+ 1, val, &pctl->lock);
+ break;
+ case PINCONF_TYPE_DRIVE_CURRENT:
+ set_drv_cur(mem, offset, val, &pctl->lock);
+ break;
+ case PINCONF_TYPE_SLEW_RATE:
+ eqbr_set_val(mem + REG_SRC, offset,
+ 1, val, &pctl->lock);
+ break;
+ case PINCONF_TYPE_OUTPUT:
+ gpio = get_gpio_desc_via_bank(pctl, bank);
+ if (!gpio) {
+ dev_err(pctl->dev, "Failed to find gpio via bank pinbase: %u, pin: %u\n",
+ bank->pin_base, pin);
+ return -ENODEV;
+ }
+ intel_eqbr_gpio_dir_output(&gpio->chip, offset, 0);
+ break;
+ default:
+ dev_err(pctl->dev, "PINCONF type error: %u\n", type);
+ return -ENODEV;
+ }
+ }
+
+ return 0;
+}
+
+static int eqbr_pinconf_group_get(struct pinctrl_dev *pctldev,
+ unsigned int group, unsigned long *config)
+{
+ struct intel_pinctrl_drv_data *pctl;
+ const unsigned int *pins;
+
+ pctl = pinctrl_dev_get_drvdata(pctldev);
+ pins = pctl->pin_grps[group].pins;
+ eqbr_pinconf_get(pctldev, pins[0], config);
+ return 0;
+}
+
+static int eqbr_pinconf_group_set(struct pinctrl_dev *pctldev,
+ unsigned int group, unsigned long *configs,
+ unsigned int num_configs)
+{
+ struct intel_pinctrl_drv_data *pctl;
+ const unsigned int *pins;
+ unsigned int cnt;
+ int i;
+
+ pctl = pinctrl_dev_get_drvdata(pctldev);
+ pins = pctl->pin_grps[group].pins;
+ cnt = pctl->pin_grps[group].nr_pins;
+
+ for (i = 0; i < cnt; i++)
+ eqbr_pinconf_set(pctldev, pins[i], configs, num_configs);
+
+ return 0;
+}
+
+static void eqbr_pinconf_dbg_show(struct pinctrl_dev *pctldev,
+ struct seq_file *s, unsigned int offset)
+{
+ struct intel_pinctrl_drv_data *pctl;
+ struct intel_pin_bank *bank;
+ struct intel_gpio_desc *gpio;
+ void __iomem *mem;
+ unsigned int pin, val;
+
+ pin = offset;
+ pctl = pinctrl_dev_get_drvdata(pctldev);
+ bank = find_pinbank_via_pin(pctl, pin);
+
+ mem = bank->membase;
+ offset = pin - bank->pin_base;
+
+ val = !!(readl(mem + REG_PUEN) & BIT(offset));
+ seq_printf(s, "PULL UP: %u\n", val);
+ val = !!(readl(mem + REG_PDEN) & BIT(offset));
+ seq_printf(s, "PULL DOWN: %u\n", val);
+ val = !!(readl(mem + REG_OD) & BIT(offset));
+ seq_printf(s, "OPEN DRAIN: %u\n", val);
+ val = get_drv_cur(mem, offset);
+ seq_printf(s, "DRIVE CURRENT: %u\n", val);
+ val = !!(readl(mem + REG_SRC) & BIT(offset));
+ seq_printf(s, "SLEW RATE: %u\n", val);
+ gpio = get_gpio_desc_via_bank(pctl, bank);
+ val = intel_eqbr_gpio_get_dir(&gpio->chip, offset);
+ seq_printf(s, "OUTPUT: %u\n", !val);
+}
+
+static const struct pinconf_ops eqbr_pinconf_ops = {
+ .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_dbg_show = eqbr_pinconf_dbg_show,
+};
+
+static int create_pin_func(struct device *dev, struct intel_pmx_func **funcs,
+ unsigned int nr_funcs, const char *fn_name,
+ const char *grp_name)
+{
+ unsigned int cnt = nr_funcs + 1;
+ const char **grps;
+ struct intel_pmx_func *function;
+
+ if (!nr_funcs) {
+ function = devm_kcalloc(dev, cnt,
+ sizeof(*function), GFP_KERNEL);
+ if (!function)
+ return -ENOMEM;
+ } else {
+ function = devm_kmemdup(dev, *funcs,
+ cnt * sizeof(*function), GFP_KERNEL);
+ if (!function)
+ return -ENOMEM;
+ devm_kfree(dev, *funcs);
+ }
+
+ function[nr_funcs].name = fn_name;
+ grps = devm_kzalloc(dev, sizeof(*grps), GFP_KERNEL);
+ if (!grps)
+ return -ENOMEM;
+ *grps = grp_name;
+ function[nr_funcs].groups = grps;
+ function[nr_funcs].nr_groups = 1;
+ *funcs = function;
+
+ return 0;
+}
+
+static int add_group_to_func(struct device *dev, struct intel_pmx_func *funcs,
+ unsigned int nr_funcs, unsigned int idx,
+ const char *grp_name)
+{
+ unsigned int nr_grps = funcs[idx].nr_groups + 1;
+ const char **grps;
+
+ grps = devm_kmemdup(dev, funcs[idx].groups,
+ nr_grps * sizeof(*grps), GFP_KERNEL);
+ if (!grps)
+ return -ENOMEM;
+ devm_kfree(dev, funcs[idx].groups);
+ grps[nr_grps - 1] = grp_name;
+ funcs[idx].groups = grps;
+ funcs[idx].nr_groups = nr_grps;
+
+ return 0;
+}
+
+static int is_func_exist(struct intel_pmx_func *funcs, const char *name,
+ unsigned int nr_funcs, unsigned int *idx)
+{
+ int i;
+
+ if (!funcs || !nr_funcs)
+ return 0;
+
+ for (i = 0; i < nr_funcs; i++) {
+ if (strcmp(funcs[i].name, name) == 0) {
+ *idx = i;
+ return 1;
+ }
+ }
+
+ return 0;
+}
+
+static void dump_pinctrl_group_func(struct intel_pinctrl_drv_data *drvdata)
+{
+ struct device *dev = drvdata->dev;
+ const struct intel_pin_group *group;
+ const struct intel_pmx_func *func;
+ int i, j;
+
+ dev_info(dev, "Total %u groups, %u functions\n",
+ drvdata->nr_grps, drvdata->nr_funcs);
+
+ for (i = 0; i < drvdata->nr_grps; i++) {
+ group = &drvdata->pin_grps[i];
+
+ dev_dbg(dev, "group name: %s, pin num: %u, pmx: %u\n",
+ group->name, group->nr_pins, group->pmx);
+ for (j = 0; j < group->nr_pins; j++)
+ dev_dbg(dev, "pin[%d]: %u\n", j, group->pins[j]);
+ }
+
+ for (i = 0; i < drvdata->nr_funcs; i++) {
+ func = &drvdata->pmx_funcs[i];
+
+ dev_dbg(dev, "function name: %s, group num: %u\n",
+ func->name, func->nr_groups);
+ for (j = 0; j < func->nr_groups; j++)
+ dev_dbg(dev, "group[%d]: %s\n", j, func->groups[j]);
+ }
+}
+
+static int pinctrl_setup_from_dt(struct device *dev,
+ struct intel_pinctrl_drv_data *drvdata)
+{
+ struct device_node *node = dev->of_node;
+ struct device_node *np;
+ struct property *prop;
+ unsigned int nr_grps=0;
+ unsigned int nr_funcs=0;
+ struct intel_pin_group *grps;
+ struct intel_pmx_func *funcs;
+ int i, j, nr_pins, ret;
+ unsigned int *pins, pin_id, pmx, fid;
+ const char *fn_name;
+
+ /* Count group number, DON'T support nested child device tree node */
+ for_each_child_of_node(node, np) {
+ if (of_find_property(np, PINCTRL_GROUP, NULL))
+ nr_grps++;
+ }
+
+ if (!nr_grps) {
+ dev_err(dev, "No pin groups found in device tree!\n");
+ return -EINVAL;
+ }
+
+ grps = devm_kcalloc(dev, nr_grps, sizeof(*grps), GFP_KERNEL);
+ if (!grps)
+ return -ENOMEM;
+
+ i = 0;
+ for_each_child_of_node(node, np) {
+ prop = of_find_property(np, PINCTRL_GROUP, NULL);
+ if (prop) {
+ /* setup groups */
+ nr_pins = of_property_count_u32_elems(np,
+ PINCTRL_PINS);
+ if (nr_pins < 0) {
+ dev_err(dev, "No pins in the group: %s\n",
+ prop->name);
+ return -EINVAL;
+ }
+ grps[i].name = prop->value;
+ pins = devm_kcalloc(dev, nr_pins, sizeof(*pins),
+ GFP_KERNEL);
+ if (!pins)
+ return -ENOMEM;
+ for (j = 0; j < nr_pins; j++) {
+ if (of_property_read_u32_index(np, PINCTRL_PINS,
+ j, &pin_id)) {
+ dev_err(dev, "Group %s: Read intel pins id failed\n",
+ grps[i].name);
+ return -EINVAL;
+ }
+ if (pin_id >= drvdata->pctl_desc.npins) {
+ dev_err(dev, "Group %s: Invalid pin ID, idx: %d, pin %u\n",
+ grps[i].name, j, pin_id);
+ return -EINVAL;
+ }
+ pins[j] = pin_id;
+ }
+ grps[i].pins = pins;
+ grps[i].nr_pins = nr_pins;
+
+ /* setup functions */
+ if (of_property_read_string(np, PINCTRL_FUNCTION,
+ &fn_name)) {
+ /* some groups may not have function, it's OK */
+ dev_dbg(dev, "Group %s: not function binded!\n",
+ grps[i].name);
+ continue;
+ }
+
+ if (of_property_read_u32(np, PINCTRL_MUX, &pmx)) {
+ dev_err(dev, "Group %s: MUX value not configured in DT!\n",
+ grps[i].name);
+ return -EINVAL;
+ }
+ grps[i].pmx = pmx;
+
+ if (is_func_exist(funcs, fn_name, nr_funcs, &fid)) {
+ ret = add_group_to_func(dev, funcs, nr_funcs,
+ fid, prop->value);
+ if (ret)
+ return ret;
+ } else {
+ ret = create_pin_func(dev, &funcs, nr_funcs,
+ fn_name, prop->value);
+ if (ret)
+ return ret;
+ nr_funcs++;
+ }
+ i++;
+ }
+ }
+
+ drvdata->pin_grps = grps;
+ drvdata->nr_grps = nr_grps;
+ drvdata->pmx_funcs = funcs;
+ drvdata->nr_funcs = nr_funcs;
+
+ dump_pinctrl_group_func(drvdata);
+
+ return 0;
+}
+
+static int pinctrl_reg(struct intel_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 = "intel-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 = pinctrl_setup_from_dt(dev, drvdata);
+ if (ret)
+ return ret;
+
+ drvdata->pctl_dev = devm_pinctrl_register(dev, pctl_desc, drvdata);
+ if (IS_ERR(drvdata->pctl_dev)) {
+ dev_err(dev, "Register pinctrl failed!\n");
+ return PTR_ERR(drvdata->pctl_dev);
+ }
+
+ return 0;
+}
+
+static int pinbank_init(struct device_node *np,
+ struct intel_pinctrl_drv_data *drvdata,
+ struct intel_pin_bank *bank, unsigned int id)
+{
+ struct device *dev = drvdata->dev;
+ struct of_phandle_args spec;
+
+ bank->membase = drvdata->membase + id * PAD_REG_OFF;
+
+ if (of_parse_phandle_with_fixed_args(np, "gpio-ranges", 3, 0, &spec)) {
+ dev_err(dev, "gpio-range not available!\n");
+ return -EFAULT;
+ }
+
+ 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 0;
+}
+
+static int pinbank_probe(struct intel_pinctrl_drv_data *drvdata)
+{
+ struct device_node *node, *np_gpio;
+ struct intel_pin_bank *banks;
+ struct intel_gpio_desc *gpio_desc;
+ struct device *dev;
+ int i=0, nr_gpio=0;
+
+ dev = drvdata->dev;
+ node = dev->of_node;
+
+ /* Count gpio bank number */
+ 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;
+
+ gpio_desc = devm_kcalloc(dev, nr_gpio, sizeof(*gpio_desc), GFP_KERNEL);
+ if (!gpio_desc)
+ return -ENOMEM;
+
+ dev_dbg(dev, "found %d gpio controller!\n", nr_gpio);
+
+ /* Initialize Pin bank */
+ for_each_node_by_name(np_gpio, "gpio") {
+ if (!of_device_is_available(np_gpio))
+ continue;
+
+ pinbank_init(np_gpio, drvdata, banks + i, i);
+
+ gpio_desc[i].node = np_gpio;
+ gpio_desc[i].bank = banks + i;
+ i++;
+ }
+
+ drvdata->pin_banks = banks;
+ drvdata->nr_banks = nr_gpio;
+ drvdata->gpio_desc = gpio_desc;
+ drvdata->nr_gpio_descs = nr_gpio;
+
+ return 0;
+}
+
+/**
+ * reset all pins to DEFAULT state, including below registers
+ * PINMUX set to GPIO
+ * DIR set to INPUT
+ * Clear PULLUP/PULLDOWN/SLEW RATE/DRIVE CURRENT/OPEN DRAIN
+ */
+static void pinctrl_pin_reset(struct intel_pinctrl_drv_data *drvdata)
+{
+ int i;
+ unsigned int pin;
+ struct intel_gpio_desc *gdesc;
+
+ for (i = 0; i < drvdata->nr_gpio_descs; i++) {
+ gdesc = &drvdata->gpio_desc[i];
+ for (pin = 0; pin < gdesc->bank->nr_pins; pin++) {
+ if (!(BIT(pin) & gdesc->bank->aval_pinmap))
+ continue;
+ eqbr_set_pin_mux(drvdata, PINMUX_GPIO,
+ pin + gdesc->bank->pin_base);
+ intel_eqbr_gpio_dir_input(&gdesc->chip, pin);
+
+ eqbr_set_val(gdesc->bank->membase + REG_PUEN,
+ pin, 1, 0, &drvdata->lock);
+ eqbr_set_val(gdesc->bank->membase + REG_PDEN,
+ pin, 1, 0, &drvdata->lock);
+ eqbr_set_val(gdesc->bank->membase + REG_SRC,
+ pin, 1, 0, &drvdata->lock);
+ eqbr_set_val(gdesc->bank->membase + REG_OD,
+ pin, 1, 0, &drvdata->lock);
+ set_drv_cur(gdesc->bank->membase, pin, 0, &drvdata->lock);
+ }
+ }
+
+ for (i = 0; i < drvdata->nr_banks; i++) {
+ dev_dbg(drvdata->dev,
+ "bank: %d, pullup: %u, pulldown: %u, slew rate: %u\n",
+ i, readl(drvdata->pin_banks[i].membase + REG_PUEN),
+ readl(drvdata->pin_banks[i].membase + REG_PDEN),
+ readl(drvdata->pin_banks[i].membase + REG_SRC));
+ dev_dbg(drvdata->dev,
+ "bank: %d, DRCC0: %u, DRCC1: %u, open drain: %u\n",
+ i, readl(drvdata->pin_banks[i].membase + REG_DCC0),
+ readl(drvdata->pin_banks[i].membase + REG_DCC1),
+ readl(drvdata->pin_banks[i].membase + REG_OD));
+ }
+}
+
+static int intel_pinctrl_probe(struct platform_device *pdev)
+{
+ struct intel_pinctrl_drv_data *drvdata;
+ struct device *dev = &pdev->dev;
+ struct resource *res;
+ int ret;
+
+ drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
+ if (!drvdata)
+ return -ENOMEM;
+
+ drvdata->dev = dev;
+ platform_set_drvdata(pdev, drvdata);
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ drvdata->membase = devm_ioremap_resource(dev, res);
+ 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;
+
+ pinctrl_pin_reset(drvdata);
+
+ return 0;
+}
+
+static const struct of_device_id intel_pinctrl_dt_match[] = {
+ { .compatible = "intel,lgm-pinctrl" },
+ {}
+};
+
+static struct platform_driver intel_pinctrl_driver = {
+ .probe = intel_pinctrl_probe,
+ .driver = {
+ .name = "intel-pinctrl",
+ .of_match_table = intel_pinctrl_dt_match,
+ },
+};
+
+module_platform_driver(intel_pinctrl_driver);
+
+MODULE_AUTHOR("Zhu Yixin <yixin.zhu@...el.com>");
+MODULE_DESCRIPTION("Intel Pinctrl Driver for LGM SoC");
diff --git a/drivers/pinctrl/pinctrl-equilibrium.h b/drivers/pinctrl/pinctrl-equilibrium.h
new file mode 100644
index 000000000000..4a0d7d4173f9
--- /dev/null
+++ b/drivers/pinctrl/pinctrl-equilibrium.h
@@ -0,0 +1,194 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright(c) 2019 Intel Corporation.
+ */
+#ifndef __PINCTRL_EQUILIBRIUM_H
+#define __PINCTRL_EQUILIBRIUM_H
+
+/* PINPAD register offset */
+#define REG_PMX_BASE 0x0 /* Port Multiplexer Control Register */
+#define REG_PUEN 0x80 /* PULL UP Enable Register */
+#define REG_PDEN 0x84 /* PULL DOWN Enable Register */
+#define REG_SRC 0x88 /* Slew Rate Control Register */
+#define REG_DCC0 0x8C /* Drive Current Control Register 0 */
+#define REG_DCC1 0x90 /* Drive Current Control Register 1 */
+#define REG_OD 0x94 /* Open Drain Enable Register */
+#define REG_AVAIL 0x98 /* Pad Control Availability Register */
+#define DRV_CUR_PINS 16 /* Drive Current pin number per register */
+#define REG_DRCC(x) (REG_DCC0 + (x) * 4) /* Driver current macro */
+
+/* GPIO register offset */
+#define GPIO_OUT 0x0 /* Data Output Register */
+#define GPIO_IN 0x4 /* Data Input Register */
+#define GPIO_DIR 0x8 /* Direction Register */
+#define GPIO_EXINTCR0 0x18 /* External Interrupt Control Register 0 */
+#define GPIO_EXINTCR1 0x1C /* External Interrupt Control Register 1 */
+#define GPIO_IRNCR 0x20 /* IRN Capture Register */
+#define GPIO_IRNICR 0x24 /* IRN Interrupt Control Register */
+#define GPIO_IRNEN 0x28 /* IRN Interrupt Enable Register */
+#define GPIO_IRNCFG 0x2C /* IRN Interrupt Configuration Register */
+#define GPIO_IRNRNSET 0x30 /* IRN Interrupt Enable Set Register */
+#define GPIO_IRNENCLR 0x34 /* IRN Interrupt Enable Clear Register */
+#define GPIO_OUTSET 0x40 /* Output Set Register */
+#define GPIO_OUTCLR 0x44 /* Output Clear Register */
+#define GPIO_DIRSET 0x48 /* Direction Set Register */
+#define GPIO_DIRCLR 0x4C /* Direction Clear Register */
+
+/* parse given pin's driver current value */
+#define PARSE_DRV_CURRENT(val, pin) (((val) >> ((pin) << 1)) & 0x3)
+
+enum {
+ GPIO_DIR_IN = 0,
+ GPIO_DIR_OUT,
+};
+
+#define GPIO_EDGE_TRIG 0
+#define GPIO_LEVEL_TRIG 1
+#define GPIO_SINGLE_EDGE 0
+#define GPIO_BOTH_EDGE 1
+#define GPIO_POSITIVE_TRIG 0
+#define GPIO_NEGATIVE_TRIG 1
+
+enum pincfg_type {
+ PINCONF_TYPE_PULL_UP,
+ PINCONF_TYPE_PULL_DOWN,
+ PINCONF_TYPE_OPEN_DRAIN,
+ PINCONF_TYPE_DRIVE_CURRENT,
+ PINCONF_TYPE_SLEW_RATE,
+ PINCONF_TYPE_OUTPUT,
+};
+
+#define PINCONF_SET_SIZE 16
+#define PINCONF_TYPE_SIZE 16
+#define PINCONF_SET_MASK (BIT(PINCONF_SET_SIZE) - 1)
+#define PINCONF_TYPE_MASK (BIT(PINCONF_TYPE_SIZE) - 1)
+
+#define PINCONF_PACK(type, set) ((type) << PINCONF_SET_SIZE | (set))
+#define PINCONF_UNPACK_TYPE(cfg) \
+ (((cfg) >> PINCONF_SET_SIZE) & PINCONF_TYPE_MASK)
+#define PINCONF_UNPACK_SET(cfg) ((cfg) & PINCONF_SET_MASK)
+
+/**
+ * struct pin_config: pin configuration
+ * @property: configuration name in device tree.
+ * @type: type of the configuration.
+ */
+struct pin_config {
+ const char *property;
+ enum pincfg_type type;
+};
+
+/**
+ * struct gpio_irq_type: gpio irq configuration
+ * @trig_type: level trigger or edge trigger
+ * @edge_type: sigle edge or both edge
+ * @logic_type: positive trigger or negative trigger
+ */
+struct gpio_irq_type {
+ unsigned int trig_type;
+ unsigned int edge_type;
+ unsigned int logic_type;
+};
+
+/**
+ * struct intel_pin_group: represent group of pins of a pinmux function.
+ * @name: name of the pin group, used to lookup the group.
+ * @pins: the pins that form the group.
+ * @nr_pins: number of pins included in this group.
+ * @pmx: pinctrl mux value for this group.
+ */
+struct intel_pin_group {
+ const char *name;
+ const unsigned int *pins;
+ unsigned int nr_pins;
+ unsigned int pmx;
+};
+
+/**
+ * struct intel_pmx_func: represent a pin function.
+ * @name: name of the pin function, used to lookup the function.
+ * @groups: one or more names of pin groups that provide this function.
+ * @nr_groups: number of groups included in @groups.
+ */
+struct intel_pmx_func {
+ const char *name;
+ const char **groups;
+ unsigned int nr_groups;
+};
+
+/**
+ * struct intel_pin_bank: represent a pin bank.
+ * @membase: base address of the pin bank register.
+ * @id: bank id, to idenify the unique bank.
+ * @pin_base: starting pin number of the pin bank.
+ * @nr_pins: number of the pins of the pin bank.
+ * @aval_pinmap: available pin bitmap of the pin bank.
+ */
+struct intel_pin_bank {
+ void __iomem *membase;
+ unsigned int id;
+ unsigned int pin_base;
+ unsigned int nr_pins;
+ u32 aval_pinmap;
+};
+
+/**
+ * struct intel_gpio_desc: represent a gpio controller.
+ * @node: device node of gpio controller.
+ * @bank: pointer to corresponding pin bank.
+ * @membase: base address of the gpio controller.
+ * @chip: gpio chip.
+ * @ic: irq chip.
+ * @name: gpio chip name.
+ * @virq: irq number of the gpio chip to parent's irq domain.
+ * @irq_domain: interrupt domain represet the
+ * gpio interrupt controller.
+ * @lock: spin lock to protect gpio register write.
+ */
+struct intel_gpio_desc {
+ struct device_node *node;
+ struct intel_pin_bank *bank;
+ void __iomem *membase;
+ struct gpio_chip chip;
+ struct irq_chip *ic;
+ const char *name;
+ unsigned int virq;
+ struct irq_domain *irq_domain;
+ raw_spinlock_t lock; /* protect gpio register */
+};
+
+/**
+ * struct intel_pinctrl_drv_data:
+ * @dev: device instance representing the controller.
+ * @pctl_desc: pin controller descriptor.
+ * @pctl_dev: pin control class device
+ * @membase: base address of pin controller
+ * @pin_grps: list of pin groups of the driver.
+ * @nr_grps: number of pin groups.
+ * @pmx_funcs: list of pin functions of the driver.
+ * @nr_funcs: number of pin functions.
+ * @pin_banks: list of pin banks of the driver.
+ * @nr_banks: number of pin banks.
+ * @gpio_desc: list of gpio controller descriptor.
+ * @nr_gpio_descs: number of gpio descriptors.
+ * @lock: protect pinctrl register write
+ */
+struct intel_pinctrl_drv_data {
+ struct device *dev;
+ struct pinctrl_desc pctl_desc;
+ struct pinctrl_dev *pctl_dev;
+ void __iomem *membase;
+
+ const struct intel_pin_group *pin_grps;
+ unsigned int nr_grps;
+ const struct intel_pmx_func *pmx_funcs;
+ unsigned int nr_funcs;
+
+ struct intel_pin_bank *pin_banks;
+ unsigned int nr_banks;
+ struct intel_gpio_desc *gpio_desc;
+ unsigned int nr_gpio_descs;
+ raw_spinlock_t lock; /* protect pinpad register */
+};
+
+#endif /* __PINCTRL_EQUILIBRIUM_H */
--
2.11.0
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