--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Renesas RZ/T2H Pin Control and GPIO driver core
+ *
+ * Based on drivers/pinctrl/renesas/pinctrl-rzg2l.c
+ *
+ * Copyright (C) 2025 Renesas Electronics Corporation.
+ */
+
+#include <linux/bitfield.h>
+#include <linux/bitops.h>
+#include <linux/bits.h>
+#include <linux/cleanup.h>
+#include <linux/clk.h>
+#include <linux/gpio/driver.h>
+#include <linux/io.h>
+#include <linux/ioport.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/spinlock.h>
+#include <linux/types.h>
+
+#include <linux/pinctrl/consumer.h>
+#include <linux/pinctrl/pinconf-generic.h>
+#include <linux/pinctrl/pinconf.h>
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/pinctrl/pinmux.h>
+
+#include <dt-bindings/pinctrl/renesas,r9a09g077-pinctrl.h>
+
+#include "../core.h"
+#include "../pinconf.h"
+#include "../pinmux.h"
+
+#define DRV_NAME "pinctrl-rzt2h"
+
+#define P(m) (0x001 * (m))
+#define PM(m) (0x200 + 2 * (m))
+#define PMC(m) (0x400 + (m))
+#define PFC(m) (0x600 + 8 * (m))
+#define PIN(m) (0x800 + (m))
+#define RSELP(m) (0xc00 + (m))
+
+#define PM_MASK GENMASK(1, 0)
+#define PM_PIN_MASK(pin) (PM_MASK << ((pin) * 2))
+#define PM_INPUT BIT(0)
+#define PM_OUTPUT BIT(1)
+
+#define PFC_MASK GENMASK_ULL(5, 0)
+#define PFC_PIN_MASK(pin) (PFC_MASK << ((pin) * 8))
+
+/*
+ * Use 16 lower bits [15:0] for pin identifier
+ * Use 8 higher bits [23:16] for pin mux function
+ */
+#define MUX_PIN_ID_MASK GENMASK(15, 0)
+#define MUX_FUNC_MASK GENMASK(23, 16)
+
+#define RZT2H_PIN_ID_TO_PORT(id) ((id) / RZT2H_PINS_PER_PORT)
+#define RZT2H_PIN_ID_TO_PIN(id) ((id) % RZT2H_PINS_PER_PORT)
+
+#define RZT2H_MAX_SAFETY_PORTS 12
+
+struct rzt2h_pinctrl_data {
+ unsigned int n_port_pins;
+ const u8 *port_pin_configs;
+ unsigned int n_ports;
+};
+
+struct rzt2h_pinctrl {
+ struct pinctrl_dev *pctl;
+ struct pinctrl_desc desc;
+ struct pinctrl_pin_desc *pins;
+ const struct rzt2h_pinctrl_data *data;
+ void __iomem *base0, *base1;
+ struct device *dev;
+ struct gpio_chip gpio_chip;
+ struct pinctrl_gpio_range gpio_range;
+ spinlock_t lock; /* lock read/write registers */
+ struct mutex mutex; /* serialize adding groups and functions */
+ bool safety_port_enabled;
+};
+
+#define RZT2H_GET_BASE(pctrl, port) \
+ ((port) > RZT2H_MAX_SAFETY_PORTS ? (pctrl)->base0 : (pctrl)->base1)
+
+#define RZT2H_PINCTRL_REG_ACCESS(size, type) \
+static inline void rzt2h_pinctrl_write##size(struct rzt2h_pinctrl *pctrl, u8 port, \
+ type val, unsigned int offset) \
+{ \
+ write##size(val, RZT2H_GET_BASE(pctrl, port) + offset); \
+} \
+static inline type rzt2h_pinctrl_read##size(struct rzt2h_pinctrl *pctrl, u8 port, \
+ unsigned int offset) \
+{ \
+ return read##size(RZT2H_GET_BASE(pctrl, port) + offset); \
+}
+
+RZT2H_PINCTRL_REG_ACCESS(b, u8)
+RZT2H_PINCTRL_REG_ACCESS(w, u16)
+RZT2H_PINCTRL_REG_ACCESS(q, u64)
+
+static int rzt2h_validate_pin(struct rzt2h_pinctrl *pctrl, unsigned int offset)
+{
+ u8 port = RZT2H_PIN_ID_TO_PORT(offset);
+ u8 pin = RZT2H_PIN_ID_TO_PIN(offset);
+ u8 pincfg;
+
+ if (offset >= pctrl->data->n_port_pins || port >= pctrl->data->n_ports)
+ return -EINVAL;
+
+ if (!pctrl->safety_port_enabled && port <= RZT2H_MAX_SAFETY_PORTS)
+ return -EINVAL;
+
+ pincfg = pctrl->data->port_pin_configs[port];
+ return (pincfg & BIT(pin)) ? 0 : -EINVAL;
+}
+
+static void rzt2h_pinctrl_set_pfc_mode(struct rzt2h_pinctrl *pctrl,
+ u8 port, u8 pin, u8 func)
+{
+ u64 reg64;
+ u16 reg16;
+
+ guard(spinlock_irqsave)(&pctrl->lock);
+
+ /* Set pin to 'Non-use (Hi-Z input protection)' */
+ reg16 = rzt2h_pinctrl_readw(pctrl, port, PM(port));
+ reg16 &= ~PM_PIN_MASK(pin);
+ rzt2h_pinctrl_writew(pctrl, port, reg16, PM(port));
+
+ /* Temporarily switch to GPIO mode with PMC register */
+ reg16 = rzt2h_pinctrl_readb(pctrl, port, PMC(port));
+ rzt2h_pinctrl_writeb(pctrl, port, reg16 & ~BIT(pin), PMC(port));
+
+ /* Select Pin function mode with PFC register */
+ reg64 = rzt2h_pinctrl_readq(pctrl, port, PFC(port));
+ reg64 &= ~PFC_PIN_MASK(pin);
+ rzt2h_pinctrl_writeq(pctrl, port, reg64 | ((u64)func << (pin * 8)), PFC(port));
+
+ /* Switch to Peripheral pin function with PMC register */
+ reg16 = rzt2h_pinctrl_readb(pctrl, port, PMC(port));
+ rzt2h_pinctrl_writeb(pctrl, port, reg16 | BIT(pin), PMC(port));
+};
+
+static int rzt2h_pinctrl_set_mux(struct pinctrl_dev *pctldev,
+ unsigned int func_selector,
+ unsigned int group_selector)
+{
+ struct rzt2h_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
+ const struct function_desc *func;
+ struct group_desc *group;
+ const unsigned int *pins;
+ unsigned int i;
+ u8 *psel_val;
+ int ret;
+
+ func = pinmux_generic_get_function(pctldev, func_selector);
+ if (!func)
+ return -EINVAL;
+
+ group = pinctrl_generic_get_group(pctldev, group_selector);
+ if (!group)
+ return -EINVAL;
+
+ psel_val = func->data;
+ pins = group->grp.pins;
+
+ for (i = 0; i < group->grp.npins; i++) {
+ dev_dbg(pctrl->dev, "port:%u pin:%u PSEL:%u\n",
+ RZT2H_PIN_ID_TO_PORT(pins[i]), RZT2H_PIN_ID_TO_PIN(pins[i]),
+ psel_val[i]);
+ ret = rzt2h_validate_pin(pctrl, pins[i]);
+ if (ret)
+ return ret;
+
+ rzt2h_pinctrl_set_pfc_mode(pctrl, RZT2H_PIN_ID_TO_PORT(pins[i]),
+ RZT2H_PIN_ID_TO_PIN(pins[i]), psel_val[i]);
+ }
+
+ return 0;
+};
+
+static int rzt2h_map_add_config(struct pinctrl_map *map,
+ const char *group_or_pin,
+ enum pinctrl_map_type type,
+ unsigned long *configs,
+ unsigned int num_configs)
+{
+ unsigned long *cfgs;
+
+ cfgs = kmemdup_array(configs, num_configs, sizeof(*cfgs), GFP_KERNEL);
+ if (!cfgs)
+ return -ENOMEM;
+
+ map->type = type;
+ map->data.configs.group_or_pin = group_or_pin;
+ map->data.configs.configs = cfgs;
+ map->data.configs.num_configs = num_configs;
+
+ return 0;
+}
+
+static int rzt2h_dt_subnode_to_map(struct pinctrl_dev *pctldev,
+ struct device_node *np,
+ struct device_node *parent,
+ struct pinctrl_map **map,
+ unsigned int *num_maps,
+ unsigned int *index)
+{
+ struct rzt2h_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
+ struct pinctrl_map *maps = *map;
+ unsigned int nmaps = *num_maps;
+ unsigned long *configs = NULL;
+ unsigned int num_pinmux = 0;
+ unsigned int idx = *index;
+ unsigned int num_pins, i;
+ unsigned int num_configs;
+ struct property *pinmux;
+ struct property *prop;
+ int ret, gsel, fsel;
+ const char **pin_fn;
+ unsigned int *pins;
+ const char *name;
+ const char *pin;
+ u8 *psel_val;
+
+ pinmux = of_find_property(np, "pinmux", NULL);
+ if (pinmux)
+ num_pinmux = pinmux->length / sizeof(u32);
+
+ ret = of_property_count_strings(np, "pins");
+ if (ret == -EINVAL) {
+ num_pins = 0;
+ } else if (ret < 0) {
+ dev_err(pctrl->dev, "Invalid pins list in DT\n");
+ return ret;
+ } else {
+ num_pins = ret;
+ }
+
+ if (!num_pinmux && !num_pins)
+ return 0;
+
+ if (num_pinmux && num_pins) {
+ dev_err(pctrl->dev,
+ "DT node must contain either a pinmux or pins and not both\n");
+ return -EINVAL;
+ }
+
+ ret = pinconf_generic_parse_dt_config(np, pctldev, &configs, &num_configs);
+ if (ret < 0)
+ return ret;
+
+ if (num_pins && !num_configs) {
+ dev_err(pctrl->dev, "DT node must contain a config\n");
+ ret = -ENODEV;
+ goto done;
+ }
+
+ if (num_pinmux) {
+ nmaps += 1;
+ if (num_configs)
+ nmaps += 1;
+ }
+
+ if (num_pins)
+ nmaps += num_pins;
+
+ maps = krealloc_array(maps, nmaps, sizeof(*maps), GFP_KERNEL);
+ if (!maps) {
+ ret = -ENOMEM;
+ goto done;
+ }
+
+ *map = maps;
+ *num_maps = nmaps;
+ if (num_pins) {
+ of_property_for_each_string(np, "pins", prop, pin) {
+ ret = rzt2h_map_add_config(&maps[idx], pin,
+ PIN_MAP_TYPE_CONFIGS_PIN,
+ configs, num_configs);
+ if (ret < 0)
+ goto done;
+
+ idx++;
+ }
+ ret = 0;
+ goto done;
+ }
+
+ pins = devm_kcalloc(pctrl->dev, num_pinmux, sizeof(*pins), GFP_KERNEL);
+ psel_val = devm_kcalloc(pctrl->dev, num_pinmux, sizeof(*psel_val),
+ GFP_KERNEL);
+ pin_fn = devm_kzalloc(pctrl->dev, sizeof(*pin_fn), GFP_KERNEL);
+ if (!pins || !psel_val || !pin_fn) {
+ ret = -ENOMEM;
+ goto done;
+ }
+
+ /* Collect pin locations and mux settings from DT properties */
+ for (i = 0; i < num_pinmux; ++i) {
+ u32 value;
+
+ ret = of_property_read_u32_index(np, "pinmux", i, &value);
+ if (ret)
+ goto done;
+ pins[i] = FIELD_GET(MUX_PIN_ID_MASK, value);
+ psel_val[i] = FIELD_GET(MUX_FUNC_MASK, value);
+ }
+
+ if (parent) {
+ name = devm_kasprintf(pctrl->dev, GFP_KERNEL, "%pOFn.%pOFn",
+ parent, np);
+ if (!name) {
+ ret = -ENOMEM;
+ goto done;
+ }
+ } else {
+ name = np->name;
+ }
+
+ if (num_configs) {
+ ret = rzt2h_map_add_config(&maps[idx], name,
+ PIN_MAP_TYPE_CONFIGS_GROUP,
+ configs, num_configs);
+ if (ret < 0)
+ goto done;
+
+ idx++;
+ }
+
+ scoped_guard(mutex, &pctrl->mutex) {
+ /* Register a single pin group listing all the pins we read from DT */
+ gsel = pinctrl_generic_add_group(pctldev, name, pins, num_pinmux, NULL);
+ if (gsel < 0) {
+ ret = gsel;
+ goto done;
+ }
+
+ /*
+ * Register a single group function where the 'data' is an array PSEL
+ * register values read from DT.
+ */
+ pin_fn[0] = name;
+ fsel = pinmux_generic_add_function(pctldev, name, pin_fn, 1, psel_val);
+ if (fsel < 0) {
+ ret = fsel;
+ goto remove_group;
+ }
+ }
+
+ maps[idx].type = PIN_MAP_TYPE_MUX_GROUP;
+ maps[idx].data.mux.group = name;
+ maps[idx].data.mux.function = name;
+ idx++;
+
+ dev_dbg(pctrl->dev, "Parsed %pOF with %d pins\n", np, num_pinmux);
+ ret = 0;
+ goto done;
+
+remove_group:
+ pinctrl_generic_remove_group(pctldev, gsel);
+done:
+ *index = idx;
+ kfree(configs);
+ return ret;
+}
+
+static void rzt2h_dt_free_map(struct pinctrl_dev *pctldev,
+ struct pinctrl_map *map,
+ unsigned int num_maps)
+{
+ unsigned int i;
+
+ if (!map)
+ return;
+
+ for (i = 0; i < num_maps; ++i) {
+ if (map[i].type == PIN_MAP_TYPE_CONFIGS_GROUP ||
+ map[i].type == PIN_MAP_TYPE_CONFIGS_PIN)
+ kfree(map[i].data.configs.configs);
+ }
+ kfree(map);
+}
+
+static int rzt2h_dt_node_to_map(struct pinctrl_dev *pctldev,
+ struct device_node *np,
+ struct pinctrl_map **map,
+ unsigned int *num_maps)
+{
+ struct rzt2h_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
+ unsigned int index;
+ int ret;
+
+ *map = NULL;
+ *num_maps = 0;
+ index = 0;
+
+ for_each_child_of_node_scoped(np, child) {
+ ret = rzt2h_dt_subnode_to_map(pctldev, child, np, map,
+ num_maps, &index);
+ if (ret < 0)
+ goto done;
+ }
+
+ if (*num_maps == 0) {
+ ret = rzt2h_dt_subnode_to_map(pctldev, np, NULL, map,
+ num_maps, &index);
+ if (ret < 0)
+ goto done;
+ }
+
+ if (*num_maps)
+ return 0;
+
+ dev_err(pctrl->dev, "no mapping found in node %pOF\n", np);
+ ret = -EINVAL;
+
+done:
+ rzt2h_dt_free_map(pctldev, *map, *num_maps);
+ return ret;
+}
+
+static const struct pinctrl_ops rzt2h_pinctrl_pctlops = {
+ .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 = rzt2h_dt_node_to_map,
+ .dt_free_map = rzt2h_dt_free_map,
+};
+
+static const struct pinmux_ops rzt2h_pinctrl_pmxops = {
+ .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 = rzt2h_pinctrl_set_mux,
+ .strict = true,
+};
+
+static int rzt2h_gpio_request(struct gpio_chip *chip, unsigned int offset)
+{
+ struct rzt2h_pinctrl *pctrl = gpiochip_get_data(chip);
+ u8 port = RZT2H_PIN_ID_TO_PORT(offset);
+ u8 bit = RZT2H_PIN_ID_TO_PIN(offset);
+ int ret;
+ u8 reg;
+
+ ret = rzt2h_validate_pin(pctrl, offset);
+ if (ret)
+ return ret;
+
+ ret = pinctrl_gpio_request(chip, offset);
+ if (ret)
+ return ret;
+
+ guard(spinlock_irqsave)(&pctrl->lock);
+
+ /* Select GPIO mode in PMC Register */
+ reg = rzt2h_pinctrl_readb(pctrl, port, PMC(port));
+ reg &= ~BIT(bit);
+ rzt2h_pinctrl_writeb(pctrl, port, reg, PMC(port));
+
+ return 0;
+}
+
+static void rzt2h_gpio_set_direction(struct rzt2h_pinctrl *pctrl, u32 port,
+ u8 bit, bool output)
+{
+ u16 reg;
+
+ guard(spinlock_irqsave)(&pctrl->lock);
+
+ reg = rzt2h_pinctrl_readw(pctrl, port, PM(port));
+ reg &= ~PM_PIN_MASK(bit);
+
+ reg |= (output ? PM_OUTPUT : PM_INPUT) << (bit * 2);
+ rzt2h_pinctrl_writew(pctrl, port, reg, PM(port));
+}
+
+static int rzt2h_gpio_get_direction(struct gpio_chip *chip, unsigned int offset)
+{
+ struct rzt2h_pinctrl *pctrl = gpiochip_get_data(chip);
+ u8 port = RZT2H_PIN_ID_TO_PORT(offset);
+ u8 bit = RZT2H_PIN_ID_TO_PIN(offset);
+ u16 reg;
+ int ret;
+
+ ret = rzt2h_validate_pin(pctrl, offset);
+ if (ret)
+ return ret;
+
+ if (rzt2h_pinctrl_readb(pctrl, port, PMC(port)) & BIT(bit))
+ return -EINVAL;
+
+ reg = rzt2h_pinctrl_readw(pctrl, port, PM(port));
+ reg = (reg >> (bit * 2)) & PM_MASK;
+ if (reg & PM_OUTPUT)
+ return GPIO_LINE_DIRECTION_OUT;
+ if (reg & PM_INPUT)
+ return GPIO_LINE_DIRECTION_IN;
+
+ return -EINVAL;
+}
+
+static int rzt2h_gpio_set(struct gpio_chip *chip, unsigned int offset,
+ int value)
+{
+ struct rzt2h_pinctrl *pctrl = gpiochip_get_data(chip);
+ u8 port = RZT2H_PIN_ID_TO_PORT(offset);
+ u8 bit = RZT2H_PIN_ID_TO_PIN(offset);
+ u8 reg;
+
+ guard(spinlock_irqsave)(&pctrl->lock);
+
+ reg = rzt2h_pinctrl_readb(pctrl, port, P(port));
+ if (value)
+ rzt2h_pinctrl_writeb(pctrl, port, reg | BIT(bit), P(port));
+ else
+ rzt2h_pinctrl_writeb(pctrl, port, reg & ~BIT(bit), P(port));
+
+ return 0;
+}
+
+static int rzt2h_gpio_get(struct gpio_chip *chip, unsigned int offset)
+{
+ struct rzt2h_pinctrl *pctrl = gpiochip_get_data(chip);
+ u8 port = RZT2H_PIN_ID_TO_PORT(offset);
+ u8 bit = RZT2H_PIN_ID_TO_PIN(offset);
+ u16 reg;
+
+ reg = rzt2h_pinctrl_readw(pctrl, port, PM(port));
+ reg = (reg >> (bit * 2)) & PM_MASK;
+ if (reg & PM_INPUT)
+ return !!(rzt2h_pinctrl_readb(pctrl, port, PIN(port)) & BIT(bit));
+ if (reg & PM_OUTPUT)
+ return !!(rzt2h_pinctrl_readb(pctrl, port, P(port)) & BIT(bit));
+
+ return -EINVAL;
+}
+
+static int rzt2h_gpio_direction_input(struct gpio_chip *chip,
+ unsigned int offset)
+{
+ struct rzt2h_pinctrl *pctrl = gpiochip_get_data(chip);
+ u8 port = RZT2H_PIN_ID_TO_PORT(offset);
+ u8 bit = RZT2H_PIN_ID_TO_PIN(offset);
+
+ rzt2h_gpio_set_direction(pctrl, port, bit, false);
+
+ return 0;
+}
+
+static int rzt2h_gpio_direction_output(struct gpio_chip *chip,
+ unsigned int offset, int value)
+{
+ struct rzt2h_pinctrl *pctrl = gpiochip_get_data(chip);
+ u8 port = RZT2H_PIN_ID_TO_PORT(offset);
+ u8 bit = RZT2H_PIN_ID_TO_PIN(offset);
+
+ rzt2h_gpio_set(chip, offset, value);
+ rzt2h_gpio_set_direction(pctrl, port, bit, true);
+
+ return 0;
+}
+
+static void rzt2h_gpio_free(struct gpio_chip *chip, unsigned int offset)
+{
+ pinctrl_gpio_free(chip, offset);
+
+ /*
+ * Set the GPIO as an input to ensure that the next GPIO request won't
+ * drive the GPIO pin as an output.
+ */
+ rzt2h_gpio_direction_input(chip, offset);
+}
+
+static const char * const rzt2h_gpio_names[] = {
+ "P00_0", "P00_1", "P00_2", "P00_3", "P00_4", "P00_5", "P00_6", "P00_7",
+ "P01_0", "P01_1", "P01_2", "P01_3", "P01_4", "P01_5", "P01_6", "P01_7",
+ "P02_0", "P02_1", "P02_2", "P02_3", "P02_4", "P02_5", "P02_6", "P02_7",
+ "P03_0", "P03_1", "P03_2", "P03_3", "P03_4", "P03_5", "P03_6", "P03_7",
+ "P04_0", "P04_1", "P04_2", "P04_3", "P04_4", "P04_5", "P04_6", "P04_7",
+ "P05_0", "P05_1", "P05_2", "P05_3", "P05_4", "P05_5", "P05_6", "P05_7",
+ "P06_0", "P06_1", "P06_2", "P06_3", "P06_4", "P06_5", "P06_6", "P06_7",
+ "P07_0", "P07_1", "P07_2", "P07_3", "P07_4", "P07_5", "P07_6", "P07_7",
+ "P08_0", "P08_1", "P08_2", "P08_3", "P08_4", "P08_5", "P08_6", "P08_7",
+ "P09_0", "P09_1", "P09_2", "P09_3", "P09_4", "P09_5", "P09_6", "P09_7",
+ "P10_0", "P10_1", "P10_2", "P10_3", "P10_4", "P10_5", "P10_6", "P10_7",
+ "P11_0", "P11_1", "P11_2", "P11_3", "P11_4", "P11_5", "P11_6", "P11_7",
+ "P12_0", "P12_1", "P12_2", "P12_3", "P12_4", "P12_5", "P12_6", "P12_7",
+ "P13_0", "P13_1", "P13_2", "P13_3", "P13_4", "P13_5", "P13_6", "P13_7",
+ "P14_0", "P14_1", "P14_2", "P14_3", "P14_4", "P14_5", "P14_6", "P14_7",
+ "P15_0", "P15_1", "P15_2", "P15_3", "P15_4", "P15_5", "P15_6", "P15_7",
+ "P16_0", "P16_1", "P16_2", "P16_3", "P16_4", "P16_5", "P16_6", "P16_7",
+ "P17_0", "P17_1", "P17_2", "P17_3", "P17_4", "P17_5", "P17_6", "P17_7",
+ "P18_0", "P18_1", "P18_2", "P18_3", "P18_4", "P18_5", "P18_6", "P18_7",
+ "P19_0", "P19_1", "P19_2", "P19_3", "P19_4", "P19_5", "P19_6", "P19_7",
+ "P20_0", "P20_1", "P20_2", "P20_3", "P20_4", "P20_5", "P20_6", "P20_7",
+ "P21_0", "P21_1", "P21_2", "P21_3", "P21_4", "P21_5", "P21_6", "P21_7",
+ "P22_0", "P22_1", "P22_2", "P22_3", "P22_4", "P22_5", "P22_6", "P22_7",
+ "P23_0", "P23_1", "P23_2", "P23_3", "P23_4", "P23_5", "P23_6", "P23_7",
+ "P24_0", "P24_1", "P24_2", "P24_3", "P24_4", "P24_5", "P24_6", "P24_7",
+ "P25_0", "P25_1", "P25_2", "P25_3", "P25_4", "P25_5", "P25_6", "P25_7",
+ "P26_0", "P26_1", "P26_2", "P26_3", "P26_4", "P26_5", "P26_6", "P26_7",
+ "P27_0", "P27_1", "P27_2", "P27_3", "P27_4", "P27_5", "P27_6", "P27_7",
+ "P28_0", "P28_1", "P28_2", "P28_3", "P28_4", "P28_5", "P28_6", "P28_7",
+ "P29_0", "P29_1", "P29_2", "P29_3", "P29_4", "P29_5", "P29_6", "P29_7",
+ "P30_0", "P30_1", "P30_2", "P30_3", "P30_4", "P30_5", "P30_6", "P30_7",
+ "P31_0", "P31_1", "P31_2", "P31_3", "P31_4", "P31_5", "P31_6", "P31_7",
+ "P32_0", "P32_1", "P32_2", "P32_3", "P32_4", "P32_5", "P32_6", "P32_7",
+ "P33_0", "P33_1", "P33_2", "P33_3", "P33_4", "P33_5", "P33_6", "P33_7",
+ "P34_0", "P34_1", "P34_2", "P34_3", "P34_4", "P34_5", "P34_6", "P34_7",
+ "P35_0", "P35_1", "P35_2", "P35_3", "P35_4", "P35_5", "P35_6", "P35_7",
+};
+
+static int rzt2h_gpio_register(struct rzt2h_pinctrl *pctrl)
+{
+ struct pinctrl_gpio_range *range = &pctrl->gpio_range;
+ struct gpio_chip *chip = &pctrl->gpio_chip;
+ struct device *dev = pctrl->dev;
+ struct of_phandle_args of_args;
+ int ret;
+
+ ret = of_parse_phandle_with_fixed_args(dev->of_node, "gpio-ranges", 3, 0, &of_args);
+ if (ret)
+ return dev_err_probe(dev, ret, "Unable to parse gpio-ranges\n");
+
+ if (of_args.args[0] != 0 || of_args.args[1] != 0 ||
+ of_args.args[2] != pctrl->data->n_port_pins)
+ return dev_err_probe(dev, -EINVAL,
+ "gpio-ranges does not match selected SOC\n");
+
+ chip->base = -1;
+ chip->parent = dev;
+ chip->owner = THIS_MODULE;
+ chip->ngpio = of_args.args[2];
+ chip->names = rzt2h_gpio_names;
+ chip->request = rzt2h_gpio_request;
+ chip->free = rzt2h_gpio_free;
+ chip->get_direction = rzt2h_gpio_get_direction;
+ chip->direction_input = rzt2h_gpio_direction_input;
+ chip->direction_output = rzt2h_gpio_direction_output;
+ chip->get = rzt2h_gpio_get;
+ chip->set = rzt2h_gpio_set;
+ chip->label = dev_name(dev);
+
+ range->id = 0;
+ range->pin_base = 0;
+ range->base = 0;
+ range->npins = chip->ngpio;
+ range->name = chip->label;
+ range->gc = chip;
+
+ ret = devm_gpiochip_add_data(dev, chip, pctrl);
+ if (ret)
+ return dev_err_probe(dev, ret, "gpiochip registration failed\n");
+
+ return ret;
+}
+
+static int rzt2h_pinctrl_register(struct rzt2h_pinctrl *pctrl)
+{
+ struct pinctrl_desc *desc = &pctrl->desc;
+ struct device *dev = pctrl->dev;
+ struct pinctrl_pin_desc *pins;
+ unsigned int i, j;
+ int ret;
+
+ desc->name = DRV_NAME;
+ desc->npins = pctrl->data->n_port_pins;
+ desc->pctlops = &rzt2h_pinctrl_pctlops;
+ desc->pmxops = &rzt2h_pinctrl_pmxops;
+ desc->owner = THIS_MODULE;
+
+ pins = devm_kcalloc(dev, desc->npins, sizeof(*pins), GFP_KERNEL);
+ if (!pins)
+ return -ENOMEM;
+
+ pctrl->pins = pins;
+ desc->pins = pins;
+
+ for (i = 0, j = 0; i < pctrl->data->n_port_pins; i++) {
+ pins[i].number = i;
+ pins[i].name = rzt2h_gpio_names[i];
+ if (i && !(i % RZT2H_PINS_PER_PORT))
+ j++;
+ }
+
+ ret = devm_pinctrl_register_and_init(dev, desc, pctrl, &pctrl->pctl);
+ if (ret)
+ return dev_err_probe(dev, ret, "pinctrl registration failed\n");
+
+ ret = pinctrl_enable(pctrl->pctl);
+ if (ret)
+ return dev_err_probe(dev, ret, "pinctrl enable failed\n");
+
+ return rzt2h_gpio_register(pctrl);
+}
+
+static int rzt2h_pinctrl_cfg_regions(struct platform_device *pdev,
+ struct rzt2h_pinctrl *pctrl)
+{
+ struct resource *res;
+
+ pctrl->base0 = devm_platform_ioremap_resource_byname(pdev, "nsr");
+ if (IS_ERR(pctrl->base0))
+ return PTR_ERR(pctrl->base0);
+
+ /*
+ * Open-coded instead of using devm_platform_ioremap_resource_byname()
+ * because the "srs" region is optional.
+ */
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "srs");
+ if (res) {
+ u8 port;
+
+ pctrl->base1 = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(pctrl->base1))
+ return PTR_ERR(pctrl->base1);
+
+ pctrl->safety_port_enabled = true;
+
+ /* Configure to select safety region 0x812c0xxx */
+ for (port = 0; port <= RZT2H_MAX_SAFETY_PORTS; port++)
+ writeb(0x0, pctrl->base1 + RSELP(port));
+ }
+
+ return 0;
+}
+
+static int rzt2h_pinctrl_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct rzt2h_pinctrl *pctrl;
+ int ret;
+
+ pctrl = devm_kzalloc(dev, sizeof(*pctrl), GFP_KERNEL);
+ if (!pctrl)
+ return -ENOMEM;
+
+ pctrl->dev = dev;
+ pctrl->data = of_device_get_match_data(dev);
+
+ ret = rzt2h_pinctrl_cfg_regions(pdev, pctrl);
+ if (ret)
+ return ret;
+
+ spin_lock_init(&pctrl->lock);
+ mutex_init(&pctrl->mutex);
+ platform_set_drvdata(pdev, pctrl);
+
+ return rzt2h_pinctrl_register(pctrl);
+}
+
+static const u8 r9a09g077_gpio_configs[] = {
+ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x7f,
+};
+
+static struct rzt2h_pinctrl_data r9a09g077_data = {
+ .n_port_pins = ARRAY_SIZE(r9a09g077_gpio_configs) * RZT2H_PINS_PER_PORT,
+ .port_pin_configs = r9a09g077_gpio_configs,
+ .n_ports = ARRAY_SIZE(r9a09g077_gpio_configs),
+};
+
+static const struct of_device_id rzt2h_pinctrl_of_table[] = {
+ {
+ .compatible = "renesas,r9a09g077-pinctrl",
+ .data = &r9a09g077_data,
+ },
+ { /* sentinel */ }
+};
+
+static struct platform_driver rzt2h_pinctrl_driver = {
+ .driver = {
+ .name = DRV_NAME,
+ .of_match_table = of_match_ptr(rzt2h_pinctrl_of_table),
+ .suppress_bind_attrs = true,
+ },
+ .probe = rzt2h_pinctrl_probe,
+};
+
+static int __init rzt2h_pinctrl_init(void)
+{
+ return platform_driver_register(&rzt2h_pinctrl_driver);
+}
+core_initcall(rzt2h_pinctrl_init);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Thierry Bultel <thierry.bultel.yh@bp.renesas.com>");
+MODULE_AUTHOR("Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>");
+MODULE_DESCRIPTION("Pin and gpio controller driver for the RZ/T2H family");
projects / thirdparty / kernel / stable.git / commitdiff
