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-rw-r--r--drivers/pinctrl/pinctrl-cy8c95x0.c1482
1 files changed, 1482 insertions, 0 deletions
diff --git a/drivers/pinctrl/pinctrl-cy8c95x0.c b/drivers/pinctrl/pinctrl-cy8c95x0.c
new file mode 100644
index 0000000000..f2b9db66fd
--- /dev/null
+++ b/drivers/pinctrl/pinctrl-cy8c95x0.c
@@ -0,0 +1,1482 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * CY8C95X0 20/40/60 pin I2C GPIO port expander with interrupt support
+ *
+ * Copyright (C) 2022 9elements GmbH
+ * Authors: Patrick Rudolph <patrick.rudolph@9elements.com>
+ * Naresh Solanki <Naresh.Solanki@9elements.com>
+ */
+
+#include <linux/acpi.h>
+#include <linux/bitmap.h>
+#include <linux/dmi.h>
+#include <linux/gpio/driver.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/property.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/seq_file.h>
+
+#include <linux/pinctrl/consumer.h>
+#include <linux/pinctrl/pinconf.h>
+#include <linux/pinctrl/pinconf-generic.h>
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/pinctrl/pinmux.h>
+
+/* Fast access registers */
+#define CY8C95X0_INPUT 0x00
+#define CY8C95X0_OUTPUT 0x08
+#define CY8C95X0_INTSTATUS 0x10
+
+#define CY8C95X0_INPUT_(x) (CY8C95X0_INPUT + (x))
+#define CY8C95X0_OUTPUT_(x) (CY8C95X0_OUTPUT + (x))
+#define CY8C95X0_INTSTATUS_(x) (CY8C95X0_INTSTATUS + (x))
+
+/* Port Select configures the port */
+#define CY8C95X0_PORTSEL 0x18
+/* Port settings, write PORTSEL first */
+#define CY8C95X0_INTMASK 0x19
+#define CY8C95X0_PWMSEL 0x1A
+#define CY8C95X0_INVERT 0x1B
+#define CY8C95X0_DIRECTION 0x1C
+/* Drive mode register change state on writing '1' */
+#define CY8C95X0_DRV_PU 0x1D
+#define CY8C95X0_DRV_PD 0x1E
+#define CY8C95X0_DRV_ODH 0x1F
+#define CY8C95X0_DRV_ODL 0x20
+#define CY8C95X0_DRV_PP_FAST 0x21
+#define CY8C95X0_DRV_PP_SLOW 0x22
+#define CY8C95X0_DRV_HIZ 0x23
+#define CY8C95X0_DEVID 0x2E
+#define CY8C95X0_WATCHDOG 0x2F
+#define CY8C95X0_COMMAND 0x30
+
+#define CY8C95X0_PIN_TO_OFFSET(x) (((x) >= 20) ? ((x) + 4) : (x))
+
+static const struct i2c_device_id cy8c95x0_id[] = {
+ { "cy8c9520", 20, },
+ { "cy8c9540", 40, },
+ { "cy8c9560", 60, },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, cy8c95x0_id);
+
+#define OF_CY8C95X(__nrgpio) ((void *)(__nrgpio))
+
+static const struct of_device_id cy8c95x0_dt_ids[] = {
+ { .compatible = "cypress,cy8c9520", .data = OF_CY8C95X(20), },
+ { .compatible = "cypress,cy8c9540", .data = OF_CY8C95X(40), },
+ { .compatible = "cypress,cy8c9560", .data = OF_CY8C95X(60), },
+ { }
+};
+MODULE_DEVICE_TABLE(of, cy8c95x0_dt_ids);
+
+static const struct acpi_gpio_params cy8c95x0_irq_gpios = { 0, 0, true };
+
+static const struct acpi_gpio_mapping cy8c95x0_acpi_irq_gpios[] = {
+ { "irq-gpios", &cy8c95x0_irq_gpios, 1, ACPI_GPIO_QUIRK_ABSOLUTE_NUMBER },
+ { }
+};
+
+static int cy8c95x0_acpi_get_irq(struct device *dev)
+{
+ int ret;
+
+ ret = devm_acpi_dev_add_driver_gpios(dev, cy8c95x0_acpi_irq_gpios);
+ if (ret)
+ dev_warn(dev, "can't add GPIO ACPI mapping\n");
+
+ ret = acpi_dev_gpio_irq_get_by(ACPI_COMPANION(dev), "irq-gpios", 0);
+ if (ret < 0)
+ return ret;
+
+ dev_info(dev, "ACPI interrupt quirk (IRQ %d)\n", ret);
+ return ret;
+}
+
+static const struct dmi_system_id cy8c95x0_dmi_acpi_irq_info[] = {
+ {
+ /*
+ * On Intel Galileo Gen 1 board the IRQ pin is provided
+ * as an absolute number instead of being relative.
+ * Since first controller (gpio-sch.c) and second
+ * (gpio-dwapb.c) are at the fixed bases, we may safely
+ * refer to the number in the global space to get an IRQ
+ * out of it.
+ */
+ .matches = {
+ DMI_EXACT_MATCH(DMI_BOARD_NAME, "Galileo"),
+ },
+ },
+ {}
+};
+
+#define MAX_BANK 8
+#define BANK_SZ 8
+#define MAX_LINE (MAX_BANK * BANK_SZ)
+
+#define CY8C95X0_GPIO_MASK GENMASK(7, 0)
+
+/**
+ * struct cy8c95x0_pinctrl - driver data
+ * @regmap: Device's regmap
+ * @irq_lock: IRQ bus lock
+ * @i2c_lock: Mutex for the device internal mux register
+ * @irq_mask: I/O bits affected by interrupts
+ * @irq_trig_raise: I/O bits affected by raising voltage level
+ * @irq_trig_fall: I/O bits affected by falling voltage level
+ * @irq_trig_low: I/O bits affected by a low voltage level
+ * @irq_trig_high: I/O bits affected by a high voltage level
+ * @push_pull: I/O bits configured as push pull driver
+ * @shiftmask: Mask used to compensate for Gport2 width
+ * @nport: Number of Gports in this chip
+ * @gpio_chip: gpiolib chip
+ * @driver_data: private driver data
+ * @regulator: Pointer to the regulator for the IC
+ * @dev: struct device
+ * @pctldev: pin controller device
+ * @pinctrl_desc: pin controller description
+ * @name: Chip controller name
+ * @tpin: Total number of pins
+ */
+struct cy8c95x0_pinctrl {
+ struct regmap *regmap;
+ struct mutex irq_lock;
+ struct mutex i2c_lock;
+ DECLARE_BITMAP(irq_mask, MAX_LINE);
+ DECLARE_BITMAP(irq_trig_raise, MAX_LINE);
+ DECLARE_BITMAP(irq_trig_fall, MAX_LINE);
+ DECLARE_BITMAP(irq_trig_low, MAX_LINE);
+ DECLARE_BITMAP(irq_trig_high, MAX_LINE);
+ DECLARE_BITMAP(push_pull, MAX_LINE);
+ DECLARE_BITMAP(shiftmask, MAX_LINE);
+ int nport;
+ struct gpio_chip gpio_chip;
+ unsigned long driver_data;
+ struct regulator *regulator;
+ struct device *dev;
+ struct pinctrl_dev *pctldev;
+ struct pinctrl_desc pinctrl_desc;
+ char name[32];
+ unsigned int tpin;
+ struct gpio_desc *gpio_reset;
+};
+
+static const struct pinctrl_pin_desc cy8c9560_pins[] = {
+ PINCTRL_PIN(0, "gp00"),
+ PINCTRL_PIN(1, "gp01"),
+ PINCTRL_PIN(2, "gp02"),
+ PINCTRL_PIN(3, "gp03"),
+ PINCTRL_PIN(4, "gp04"),
+ PINCTRL_PIN(5, "gp05"),
+ PINCTRL_PIN(6, "gp06"),
+ PINCTRL_PIN(7, "gp07"),
+
+ PINCTRL_PIN(8, "gp10"),
+ PINCTRL_PIN(9, "gp11"),
+ PINCTRL_PIN(10, "gp12"),
+ PINCTRL_PIN(11, "gp13"),
+ PINCTRL_PIN(12, "gp14"),
+ PINCTRL_PIN(13, "gp15"),
+ PINCTRL_PIN(14, "gp16"),
+ PINCTRL_PIN(15, "gp17"),
+
+ PINCTRL_PIN(16, "gp20"),
+ PINCTRL_PIN(17, "gp21"),
+ PINCTRL_PIN(18, "gp22"),
+ PINCTRL_PIN(19, "gp23"),
+
+ PINCTRL_PIN(20, "gp30"),
+ PINCTRL_PIN(21, "gp31"),
+ PINCTRL_PIN(22, "gp32"),
+ PINCTRL_PIN(23, "gp33"),
+ PINCTRL_PIN(24, "gp34"),
+ PINCTRL_PIN(25, "gp35"),
+ PINCTRL_PIN(26, "gp36"),
+ PINCTRL_PIN(27, "gp37"),
+
+ PINCTRL_PIN(28, "gp40"),
+ PINCTRL_PIN(29, "gp41"),
+ PINCTRL_PIN(30, "gp42"),
+ PINCTRL_PIN(31, "gp43"),
+ PINCTRL_PIN(32, "gp44"),
+ PINCTRL_PIN(33, "gp45"),
+ PINCTRL_PIN(34, "gp46"),
+ PINCTRL_PIN(35, "gp47"),
+
+ PINCTRL_PIN(36, "gp50"),
+ PINCTRL_PIN(37, "gp51"),
+ PINCTRL_PIN(38, "gp52"),
+ PINCTRL_PIN(39, "gp53"),
+ PINCTRL_PIN(40, "gp54"),
+ PINCTRL_PIN(41, "gp55"),
+ PINCTRL_PIN(42, "gp56"),
+ PINCTRL_PIN(43, "gp57"),
+
+ PINCTRL_PIN(44, "gp60"),
+ PINCTRL_PIN(45, "gp61"),
+ PINCTRL_PIN(46, "gp62"),
+ PINCTRL_PIN(47, "gp63"),
+ PINCTRL_PIN(48, "gp64"),
+ PINCTRL_PIN(49, "gp65"),
+ PINCTRL_PIN(50, "gp66"),
+ PINCTRL_PIN(51, "gp67"),
+
+ PINCTRL_PIN(52, "gp70"),
+ PINCTRL_PIN(53, "gp71"),
+ PINCTRL_PIN(54, "gp72"),
+ PINCTRL_PIN(55, "gp73"),
+ PINCTRL_PIN(56, "gp74"),
+ PINCTRL_PIN(57, "gp75"),
+ PINCTRL_PIN(58, "gp76"),
+ PINCTRL_PIN(59, "gp77"),
+};
+
+static const char * const cy8c95x0_groups[] = {
+ "gp00",
+ "gp01",
+ "gp02",
+ "gp03",
+ "gp04",
+ "gp05",
+ "gp06",
+ "gp07",
+
+ "gp10",
+ "gp11",
+ "gp12",
+ "gp13",
+ "gp14",
+ "gp15",
+ "gp16",
+ "gp17",
+
+ "gp20",
+ "gp21",
+ "gp22",
+ "gp23",
+
+ "gp30",
+ "gp31",
+ "gp32",
+ "gp33",
+ "gp34",
+ "gp35",
+ "gp36",
+ "gp37",
+
+ "gp40",
+ "gp41",
+ "gp42",
+ "gp43",
+ "gp44",
+ "gp45",
+ "gp46",
+ "gp47",
+
+ "gp50",
+ "gp51",
+ "gp52",
+ "gp53",
+ "gp54",
+ "gp55",
+ "gp56",
+ "gp57",
+
+ "gp60",
+ "gp61",
+ "gp62",
+ "gp63",
+ "gp64",
+ "gp65",
+ "gp66",
+ "gp67",
+
+ "gp70",
+ "gp71",
+ "gp72",
+ "gp73",
+ "gp74",
+ "gp75",
+ "gp76",
+ "gp77",
+};
+
+static int cy8c95x0_pinmux_direction(struct cy8c95x0_pinctrl *chip,
+ unsigned int pin, bool input);
+
+static inline u8 cypress_get_port(struct cy8c95x0_pinctrl *chip, unsigned int pin)
+{
+ /* Account for GPORT2 which only has 4 bits */
+ return CY8C95X0_PIN_TO_OFFSET(pin) / BANK_SZ;
+}
+
+static int cypress_get_pin_mask(struct cy8c95x0_pinctrl *chip, unsigned int pin)
+{
+ /* Account for GPORT2 which only has 4 bits */
+ return BIT(CY8C95X0_PIN_TO_OFFSET(pin) % BANK_SZ);
+}
+
+static bool cy8c95x0_readable_register(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case 0x24 ... 0x27:
+ return false;
+ default:
+ return true;
+ }
+}
+
+static bool cy8c95x0_writeable_register(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case CY8C95X0_INPUT_(0) ... CY8C95X0_INPUT_(7):
+ return false;
+ case CY8C95X0_DEVID:
+ return false;
+ case 0x24 ... 0x27:
+ return false;
+ default:
+ return true;
+ }
+}
+
+static bool cy8c95x0_volatile_register(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case CY8C95X0_INPUT_(0) ... CY8C95X0_INPUT_(7):
+ case CY8C95X0_INTSTATUS_(0) ... CY8C95X0_INTSTATUS_(7):
+ case CY8C95X0_INTMASK:
+ case CY8C95X0_INVERT:
+ case CY8C95X0_PWMSEL:
+ case CY8C95X0_DIRECTION:
+ case CY8C95X0_DRV_PU:
+ case CY8C95X0_DRV_PD:
+ case CY8C95X0_DRV_ODH:
+ case CY8C95X0_DRV_ODL:
+ case CY8C95X0_DRV_PP_FAST:
+ case CY8C95X0_DRV_PP_SLOW:
+ case CY8C95X0_DRV_HIZ:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static bool cy8c95x0_precious_register(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case CY8C95X0_INTSTATUS_(0) ... CY8C95X0_INTSTATUS_(7):
+ return true;
+ default:
+ return false;
+ }
+}
+
+static const struct reg_default cy8c95x0_reg_defaults[] = {
+ { CY8C95X0_OUTPUT_(0), GENMASK(7, 0) },
+ { CY8C95X0_OUTPUT_(1), GENMASK(7, 0) },
+ { CY8C95X0_OUTPUT_(2), GENMASK(7, 0) },
+ { CY8C95X0_OUTPUT_(3), GENMASK(7, 0) },
+ { CY8C95X0_OUTPUT_(4), GENMASK(7, 0) },
+ { CY8C95X0_OUTPUT_(5), GENMASK(7, 0) },
+ { CY8C95X0_OUTPUT_(6), GENMASK(7, 0) },
+ { CY8C95X0_OUTPUT_(7), GENMASK(7, 0) },
+ { CY8C95X0_PORTSEL, 0 },
+ { CY8C95X0_PWMSEL, 0 },
+};
+
+static const struct regmap_config cy8c95x0_i2c_regmap = {
+ .reg_bits = 8,
+ .val_bits = 8,
+
+ .reg_defaults = cy8c95x0_reg_defaults,
+ .num_reg_defaults = ARRAY_SIZE(cy8c95x0_reg_defaults),
+
+ .readable_reg = cy8c95x0_readable_register,
+ .writeable_reg = cy8c95x0_writeable_register,
+ .volatile_reg = cy8c95x0_volatile_register,
+ .precious_reg = cy8c95x0_precious_register,
+
+ .cache_type = REGCACHE_FLAT,
+ .max_register = CY8C95X0_COMMAND,
+};
+
+static int cy8c95x0_write_regs_mask(struct cy8c95x0_pinctrl *chip, int reg,
+ unsigned long *val, unsigned long *mask)
+{
+ DECLARE_BITMAP(tmask, MAX_LINE);
+ DECLARE_BITMAP(tval, MAX_LINE);
+ int write_val;
+ int ret = 0;
+ int i, off = 0;
+ u8 bits;
+
+ /* Add the 4 bit gap of Gport2 */
+ bitmap_andnot(tmask, mask, chip->shiftmask, MAX_LINE);
+ bitmap_shift_left(tmask, tmask, 4, MAX_LINE);
+ bitmap_replace(tmask, tmask, mask, chip->shiftmask, BANK_SZ * 3);
+
+ bitmap_andnot(tval, val, chip->shiftmask, MAX_LINE);
+ bitmap_shift_left(tval, tval, 4, MAX_LINE);
+ bitmap_replace(tval, tval, val, chip->shiftmask, BANK_SZ * 3);
+
+ mutex_lock(&chip->i2c_lock);
+ for (i = 0; i < chip->nport; i++) {
+ /* Skip over unused banks */
+ bits = bitmap_get_value8(tmask, i * BANK_SZ);
+ if (!bits)
+ continue;
+
+ switch (reg) {
+ /* Muxed registers */
+ case CY8C95X0_INTMASK:
+ case CY8C95X0_PWMSEL:
+ case CY8C95X0_INVERT:
+ case CY8C95X0_DIRECTION:
+ case CY8C95X0_DRV_PU:
+ case CY8C95X0_DRV_PD:
+ case CY8C95X0_DRV_ODH:
+ case CY8C95X0_DRV_ODL:
+ case CY8C95X0_DRV_PP_FAST:
+ case CY8C95X0_DRV_PP_SLOW:
+ case CY8C95X0_DRV_HIZ:
+ ret = regmap_write(chip->regmap, CY8C95X0_PORTSEL, i);
+ if (ret < 0)
+ goto out;
+ off = reg;
+ break;
+ /* Direct access registers */
+ case CY8C95X0_INPUT:
+ case CY8C95X0_OUTPUT:
+ case CY8C95X0_INTSTATUS:
+ off = reg + i;
+ break;
+ default:
+ ret = -EINVAL;
+ goto out;
+ }
+
+ write_val = bitmap_get_value8(tval, i * BANK_SZ);
+
+ ret = regmap_update_bits(chip->regmap, off, bits, write_val);
+ if (ret < 0)
+ goto out;
+ }
+out:
+ mutex_unlock(&chip->i2c_lock);
+
+ if (ret < 0)
+ dev_err(chip->dev, "failed writing register %d: err %d\n", off, ret);
+
+ return ret;
+}
+
+static int cy8c95x0_read_regs_mask(struct cy8c95x0_pinctrl *chip, int reg,
+ unsigned long *val, unsigned long *mask)
+{
+ DECLARE_BITMAP(tmask, MAX_LINE);
+ DECLARE_BITMAP(tval, MAX_LINE);
+ DECLARE_BITMAP(tmp, MAX_LINE);
+ int read_val;
+ int ret = 0;
+ int i, off = 0;
+ u8 bits;
+
+ /* Add the 4 bit gap of Gport2 */
+ bitmap_andnot(tmask, mask, chip->shiftmask, MAX_LINE);
+ bitmap_shift_left(tmask, tmask, 4, MAX_LINE);
+ bitmap_replace(tmask, tmask, mask, chip->shiftmask, BANK_SZ * 3);
+
+ bitmap_andnot(tval, val, chip->shiftmask, MAX_LINE);
+ bitmap_shift_left(tval, tval, 4, MAX_LINE);
+ bitmap_replace(tval, tval, val, chip->shiftmask, BANK_SZ * 3);
+
+ mutex_lock(&chip->i2c_lock);
+ for (i = 0; i < chip->nport; i++) {
+ /* Skip over unused banks */
+ bits = bitmap_get_value8(tmask, i * BANK_SZ);
+ if (!bits)
+ continue;
+
+ switch (reg) {
+ /* Muxed registers */
+ case CY8C95X0_INTMASK:
+ case CY8C95X0_PWMSEL:
+ case CY8C95X0_INVERT:
+ case CY8C95X0_DIRECTION:
+ case CY8C95X0_DRV_PU:
+ case CY8C95X0_DRV_PD:
+ case CY8C95X0_DRV_ODH:
+ case CY8C95X0_DRV_ODL:
+ case CY8C95X0_DRV_PP_FAST:
+ case CY8C95X0_DRV_PP_SLOW:
+ case CY8C95X0_DRV_HIZ:
+ ret = regmap_write(chip->regmap, CY8C95X0_PORTSEL, i);
+ if (ret < 0)
+ goto out;
+ off = reg;
+ break;
+ /* Direct access registers */
+ case CY8C95X0_INPUT:
+ case CY8C95X0_OUTPUT:
+ case CY8C95X0_INTSTATUS:
+ off = reg + i;
+ break;
+ default:
+ ret = -EINVAL;
+ goto out;
+ }
+
+ ret = regmap_read(chip->regmap, off, &read_val);
+ if (ret < 0)
+ goto out;
+
+ read_val &= bits;
+ read_val |= bitmap_get_value8(tval, i * BANK_SZ) & ~bits;
+ bitmap_set_value8(tval, read_val, i * BANK_SZ);
+ }
+
+ /* Fill the 4 bit gap of Gport2 */
+ bitmap_shift_right(tmp, tval, 4, MAX_LINE);
+ bitmap_replace(val, tmp, tval, chip->shiftmask, MAX_LINE);
+
+out:
+ mutex_unlock(&chip->i2c_lock);
+
+ if (ret < 0)
+ dev_err(chip->dev, "failed reading register %d: err %d\n", off, ret);
+
+ return ret;
+}
+
+static int cy8c95x0_gpio_direction_input(struct gpio_chip *gc, unsigned int off)
+{
+ return pinctrl_gpio_direction_input(gc->base + off);
+}
+
+static int cy8c95x0_gpio_direction_output(struct gpio_chip *gc,
+ unsigned int off, int val)
+{
+ struct cy8c95x0_pinctrl *chip = gpiochip_get_data(gc);
+ u8 port = cypress_get_port(chip, off);
+ u8 outreg = CY8C95X0_OUTPUT_(port);
+ u8 bit = cypress_get_pin_mask(chip, off);
+ int ret;
+
+ /* Set output level */
+ ret = regmap_write_bits(chip->regmap, outreg, bit, val ? bit : 0);
+ if (ret)
+ return ret;
+
+ return pinctrl_gpio_direction_output(gc->base + off);
+}
+
+static int cy8c95x0_gpio_get_value(struct gpio_chip *gc, unsigned int off)
+{
+ struct cy8c95x0_pinctrl *chip = gpiochip_get_data(gc);
+ u8 inreg = CY8C95X0_INPUT_(cypress_get_port(chip, off));
+ u8 bit = cypress_get_pin_mask(chip, off);
+ u32 reg_val;
+ int ret;
+
+ ret = regmap_read(chip->regmap, inreg, &reg_val);
+ if (ret < 0) {
+ /*
+ * NOTE:
+ * Diagnostic already emitted; that's all we should
+ * do unless gpio_*_value_cansleep() calls become different
+ * from their nonsleeping siblings (and report faults).
+ */
+ return 0;
+ }
+
+ return !!(reg_val & bit);
+}
+
+static void cy8c95x0_gpio_set_value(struct gpio_chip *gc, unsigned int off,
+ int val)
+{
+ struct cy8c95x0_pinctrl *chip = gpiochip_get_data(gc);
+ u8 outreg = CY8C95X0_OUTPUT_(cypress_get_port(chip, off));
+ u8 bit = cypress_get_pin_mask(chip, off);
+
+ regmap_write_bits(chip->regmap, outreg, bit, val ? bit : 0);
+}
+
+static int cy8c95x0_gpio_get_direction(struct gpio_chip *gc, unsigned int off)
+{
+ struct cy8c95x0_pinctrl *chip = gpiochip_get_data(gc);
+ u8 port = cypress_get_port(chip, off);
+ u8 bit = cypress_get_pin_mask(chip, off);
+ u32 reg_val;
+ int ret;
+
+ mutex_lock(&chip->i2c_lock);
+
+ ret = regmap_write(chip->regmap, CY8C95X0_PORTSEL, port);
+ if (ret < 0)
+ goto out;
+
+ ret = regmap_read(chip->regmap, CY8C95X0_DIRECTION, &reg_val);
+ if (ret < 0)
+ goto out;
+
+ mutex_unlock(&chip->i2c_lock);
+
+ if (reg_val & bit)
+ return GPIO_LINE_DIRECTION_IN;
+
+ return GPIO_LINE_DIRECTION_OUT;
+out:
+ mutex_unlock(&chip->i2c_lock);
+ return ret;
+}
+
+static int cy8c95x0_gpio_get_pincfg(struct cy8c95x0_pinctrl *chip,
+ unsigned int off,
+ unsigned long *config)
+{
+ enum pin_config_param param = pinconf_to_config_param(*config);
+ u8 port = cypress_get_port(chip, off);
+ u8 bit = cypress_get_pin_mask(chip, off);
+ unsigned int reg;
+ u32 reg_val;
+ u16 arg = 0;
+ int ret;
+
+ mutex_lock(&chip->i2c_lock);
+
+ /* Select port */
+ ret = regmap_write(chip->regmap, CY8C95X0_PORTSEL, port);
+ if (ret < 0)
+ goto out;
+
+ switch (param) {
+ case PIN_CONFIG_BIAS_PULL_UP:
+ reg = CY8C95X0_DRV_PU;
+ break;
+ case PIN_CONFIG_BIAS_PULL_DOWN:
+ reg = CY8C95X0_DRV_PD;
+ break;
+ case PIN_CONFIG_BIAS_DISABLE:
+ reg = CY8C95X0_DRV_HIZ;
+ break;
+ case PIN_CONFIG_DRIVE_OPEN_DRAIN:
+ reg = CY8C95X0_DRV_ODL;
+ break;
+ case PIN_CONFIG_DRIVE_OPEN_SOURCE:
+ reg = CY8C95X0_DRV_ODH;
+ break;
+ case PIN_CONFIG_DRIVE_PUSH_PULL:
+ reg = CY8C95X0_DRV_PP_FAST;
+ break;
+ case PIN_CONFIG_INPUT_ENABLE:
+ reg = CY8C95X0_DIRECTION;
+ break;
+ case PIN_CONFIG_MODE_PWM:
+ reg = CY8C95X0_PWMSEL;
+ break;
+ case PIN_CONFIG_OUTPUT:
+ reg = CY8C95X0_OUTPUT_(port);
+ break;
+ case PIN_CONFIG_OUTPUT_ENABLE:
+ reg = CY8C95X0_DIRECTION;
+ break;
+
+ case PIN_CONFIG_BIAS_HIGH_IMPEDANCE:
+ case PIN_CONFIG_BIAS_BUS_HOLD:
+ case PIN_CONFIG_BIAS_PULL_PIN_DEFAULT:
+ case PIN_CONFIG_DRIVE_STRENGTH:
+ case PIN_CONFIG_DRIVE_STRENGTH_UA:
+ case PIN_CONFIG_INPUT_DEBOUNCE:
+ case PIN_CONFIG_INPUT_SCHMITT:
+ case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
+ case PIN_CONFIG_MODE_LOW_POWER:
+ case PIN_CONFIG_PERSIST_STATE:
+ case PIN_CONFIG_POWER_SOURCE:
+ case PIN_CONFIG_SKEW_DELAY:
+ case PIN_CONFIG_SLEEP_HARDWARE_STATE:
+ case PIN_CONFIG_SLEW_RATE:
+ default:
+ ret = -ENOTSUPP;
+ goto out;
+ }
+ /*
+ * Writing 1 to one of the drive mode registers will automatically
+ * clear conflicting set bits in the other drive mode registers.
+ */
+ ret = regmap_read(chip->regmap, reg, &reg_val);
+ if (reg_val & bit)
+ arg = 1;
+ if (param == PIN_CONFIG_OUTPUT_ENABLE)
+ arg = !arg;
+
+ *config = pinconf_to_config_packed(param, (u16)arg);
+out:
+ mutex_unlock(&chip->i2c_lock);
+
+ return ret;
+}
+
+static int cy8c95x0_gpio_set_pincfg(struct cy8c95x0_pinctrl *chip,
+ unsigned int off,
+ unsigned long config)
+{
+ u8 port = cypress_get_port(chip, off);
+ u8 bit = cypress_get_pin_mask(chip, off);
+ unsigned long param = pinconf_to_config_param(config);
+ unsigned long arg = pinconf_to_config_argument(config);
+ unsigned int reg;
+ int ret;
+
+ mutex_lock(&chip->i2c_lock);
+
+ /* Select port */
+ ret = regmap_write(chip->regmap, CY8C95X0_PORTSEL, port);
+ if (ret < 0)
+ goto out;
+
+ switch (param) {
+ case PIN_CONFIG_BIAS_PULL_UP:
+ __clear_bit(off, chip->push_pull);
+ reg = CY8C95X0_DRV_PU;
+ break;
+ case PIN_CONFIG_BIAS_PULL_DOWN:
+ __clear_bit(off, chip->push_pull);
+ reg = CY8C95X0_DRV_PD;
+ break;
+ case PIN_CONFIG_BIAS_DISABLE:
+ __clear_bit(off, chip->push_pull);
+ reg = CY8C95X0_DRV_HIZ;
+ break;
+ case PIN_CONFIG_DRIVE_OPEN_DRAIN:
+ __clear_bit(off, chip->push_pull);
+ reg = CY8C95X0_DRV_ODL;
+ break;
+ case PIN_CONFIG_DRIVE_OPEN_SOURCE:
+ __clear_bit(off, chip->push_pull);
+ reg = CY8C95X0_DRV_ODH;
+ break;
+ case PIN_CONFIG_DRIVE_PUSH_PULL:
+ __set_bit(off, chip->push_pull);
+ reg = CY8C95X0_DRV_PP_FAST;
+ break;
+ case PIN_CONFIG_MODE_PWM:
+ reg = CY8C95X0_PWMSEL;
+ break;
+ case PIN_CONFIG_OUTPUT_ENABLE:
+ ret = cy8c95x0_pinmux_direction(chip, off, !arg);
+ goto out;
+ case PIN_CONFIG_INPUT_ENABLE:
+ ret = cy8c95x0_pinmux_direction(chip, off, arg);
+ goto out;
+ default:
+ ret = -ENOTSUPP;
+ goto out;
+ }
+ /*
+ * Writing 1 to one of the drive mode registers will automatically
+ * clear conflicting set bits in the other drive mode registers.
+ */
+ ret = regmap_write_bits(chip->regmap, reg, bit, bit);
+
+out:
+ mutex_unlock(&chip->i2c_lock);
+ return ret;
+}
+
+static int cy8c95x0_gpio_get_multiple(struct gpio_chip *gc,
+ unsigned long *mask, unsigned long *bits)
+{
+ struct cy8c95x0_pinctrl *chip = gpiochip_get_data(gc);
+
+ return cy8c95x0_read_regs_mask(chip, CY8C95X0_INPUT, bits, mask);
+}
+
+static void cy8c95x0_gpio_set_multiple(struct gpio_chip *gc,
+ unsigned long *mask, unsigned long *bits)
+{
+ struct cy8c95x0_pinctrl *chip = gpiochip_get_data(gc);
+
+ cy8c95x0_write_regs_mask(chip, CY8C95X0_OUTPUT, bits, mask);
+}
+
+static int cy8c95x0_add_pin_ranges(struct gpio_chip *gc)
+{
+ struct cy8c95x0_pinctrl *chip = gpiochip_get_data(gc);
+ struct device *dev = chip->dev;
+ int ret;
+
+ ret = gpiochip_add_pin_range(gc, dev_name(dev), 0, 0, chip->tpin);
+ if (ret)
+ dev_err(dev, "failed to add GPIO pin range\n");
+
+ return ret;
+}
+
+static int cy8c95x0_setup_gpiochip(struct cy8c95x0_pinctrl *chip)
+{
+ struct gpio_chip *gc = &chip->gpio_chip;
+
+ gc->request = gpiochip_generic_request;
+ gc->free = gpiochip_generic_free;
+ gc->direction_input = cy8c95x0_gpio_direction_input;
+ gc->direction_output = cy8c95x0_gpio_direction_output;
+ gc->get = cy8c95x0_gpio_get_value;
+ gc->set = cy8c95x0_gpio_set_value;
+ gc->get_direction = cy8c95x0_gpio_get_direction;
+ gc->get_multiple = cy8c95x0_gpio_get_multiple;
+ gc->set_multiple = cy8c95x0_gpio_set_multiple;
+ gc->set_config = gpiochip_generic_config;
+ gc->can_sleep = true;
+ gc->add_pin_ranges = cy8c95x0_add_pin_ranges;
+
+ gc->base = -1;
+ gc->ngpio = chip->tpin;
+
+ gc->parent = chip->dev;
+ gc->owner = THIS_MODULE;
+ gc->names = NULL;
+
+ gc->label = dev_name(chip->dev);
+
+ return devm_gpiochip_add_data(chip->dev, gc, chip);
+}
+
+static void cy8c95x0_irq_mask(struct irq_data *d)
+{
+ struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+ struct cy8c95x0_pinctrl *chip = gpiochip_get_data(gc);
+ irq_hw_number_t hwirq = irqd_to_hwirq(d);
+
+ set_bit(hwirq, chip->irq_mask);
+ gpiochip_disable_irq(gc, hwirq);
+}
+
+static void cy8c95x0_irq_unmask(struct irq_data *d)
+{
+ struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+ struct cy8c95x0_pinctrl *chip = gpiochip_get_data(gc);
+ irq_hw_number_t hwirq = irqd_to_hwirq(d);
+
+ gpiochip_enable_irq(gc, hwirq);
+ clear_bit(hwirq, chip->irq_mask);
+}
+
+static void cy8c95x0_irq_bus_lock(struct irq_data *d)
+{
+ struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+ struct cy8c95x0_pinctrl *chip = gpiochip_get_data(gc);
+
+ mutex_lock(&chip->irq_lock);
+}
+
+static void cy8c95x0_irq_bus_sync_unlock(struct irq_data *d)
+{
+ struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+ struct cy8c95x0_pinctrl *chip = gpiochip_get_data(gc);
+ DECLARE_BITMAP(ones, MAX_LINE);
+ DECLARE_BITMAP(irq_mask, MAX_LINE);
+ DECLARE_BITMAP(reg_direction, MAX_LINE);
+
+ bitmap_fill(ones, MAX_LINE);
+
+ cy8c95x0_write_regs_mask(chip, CY8C95X0_INTMASK, chip->irq_mask, ones);
+
+ /* Switch direction to input if needed */
+ cy8c95x0_read_regs_mask(chip, CY8C95X0_DIRECTION, reg_direction, chip->irq_mask);
+ bitmap_or(irq_mask, chip->irq_mask, reg_direction, MAX_LINE);
+ bitmap_complement(irq_mask, irq_mask, MAX_LINE);
+
+ /* Look for any newly setup interrupt */
+ cy8c95x0_write_regs_mask(chip, CY8C95X0_DIRECTION, ones, irq_mask);
+
+ mutex_unlock(&chip->irq_lock);
+}
+
+static int cy8c95x0_irq_set_type(struct irq_data *d, unsigned int type)
+{
+ struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+ struct cy8c95x0_pinctrl *chip = gpiochip_get_data(gc);
+ irq_hw_number_t hwirq = irqd_to_hwirq(d);
+ unsigned int trig_type;
+
+ switch (type) {
+ case IRQ_TYPE_EDGE_RISING:
+ case IRQ_TYPE_EDGE_FALLING:
+ case IRQ_TYPE_EDGE_BOTH:
+ trig_type = type;
+ break;
+ case IRQ_TYPE_LEVEL_HIGH:
+ trig_type = IRQ_TYPE_EDGE_RISING;
+ break;
+ case IRQ_TYPE_LEVEL_LOW:
+ trig_type = IRQ_TYPE_EDGE_FALLING;
+ break;
+ default:
+ dev_err(chip->dev, "irq %d: unsupported type %d\n", d->irq, type);
+ return -EINVAL;
+ }
+
+ assign_bit(hwirq, chip->irq_trig_fall, trig_type & IRQ_TYPE_EDGE_FALLING);
+ assign_bit(hwirq, chip->irq_trig_raise, trig_type & IRQ_TYPE_EDGE_RISING);
+ assign_bit(hwirq, chip->irq_trig_low, type == IRQ_TYPE_LEVEL_LOW);
+ assign_bit(hwirq, chip->irq_trig_high, type == IRQ_TYPE_LEVEL_HIGH);
+
+ return 0;
+}
+
+static void cy8c95x0_irq_shutdown(struct irq_data *d)
+{
+ struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+ struct cy8c95x0_pinctrl *chip = gpiochip_get_data(gc);
+ irq_hw_number_t hwirq = irqd_to_hwirq(d);
+
+ clear_bit(hwirq, chip->irq_trig_raise);
+ clear_bit(hwirq, chip->irq_trig_fall);
+ clear_bit(hwirq, chip->irq_trig_low);
+ clear_bit(hwirq, chip->irq_trig_high);
+}
+
+static const struct irq_chip cy8c95x0_irqchip = {
+ .name = "cy8c95x0-irq",
+ .irq_mask = cy8c95x0_irq_mask,
+ .irq_unmask = cy8c95x0_irq_unmask,
+ .irq_bus_lock = cy8c95x0_irq_bus_lock,
+ .irq_bus_sync_unlock = cy8c95x0_irq_bus_sync_unlock,
+ .irq_set_type = cy8c95x0_irq_set_type,
+ .irq_shutdown = cy8c95x0_irq_shutdown,
+ .flags = IRQCHIP_IMMUTABLE,
+ GPIOCHIP_IRQ_RESOURCE_HELPERS,
+};
+
+static bool cy8c95x0_irq_pending(struct cy8c95x0_pinctrl *chip, unsigned long *pending)
+{
+ DECLARE_BITMAP(ones, MAX_LINE);
+ DECLARE_BITMAP(cur_stat, MAX_LINE);
+ DECLARE_BITMAP(new_stat, MAX_LINE);
+ DECLARE_BITMAP(trigger, MAX_LINE);
+
+ bitmap_fill(ones, MAX_LINE);
+
+ /* Read the current interrupt status from the device */
+ if (cy8c95x0_read_regs_mask(chip, CY8C95X0_INTSTATUS, trigger, ones))
+ return false;
+
+ /* Check latched inputs */
+ if (cy8c95x0_read_regs_mask(chip, CY8C95X0_INPUT, cur_stat, trigger))
+ return false;
+
+ /* Apply filter for rising/falling edge selection */
+ bitmap_replace(new_stat, chip->irq_trig_fall, chip->irq_trig_raise,
+ cur_stat, MAX_LINE);
+
+ bitmap_and(pending, new_stat, trigger, MAX_LINE);
+
+ return !bitmap_empty(pending, MAX_LINE);
+}
+
+static irqreturn_t cy8c95x0_irq_handler(int irq, void *devid)
+{
+ struct cy8c95x0_pinctrl *chip = devid;
+ struct gpio_chip *gc = &chip->gpio_chip;
+ DECLARE_BITMAP(pending, MAX_LINE);
+ int nested_irq, level;
+ bool ret;
+
+ ret = cy8c95x0_irq_pending(chip, pending);
+ if (!ret)
+ return IRQ_RETVAL(0);
+
+ ret = 0;
+ for_each_set_bit(level, pending, MAX_LINE) {
+ /* Already accounted for 4bit gap in GPort2 */
+ nested_irq = irq_find_mapping(gc->irq.domain, level);
+
+ if (unlikely(nested_irq <= 0)) {
+ dev_warn_ratelimited(gc->parent, "unmapped interrupt %d\n", level);
+ continue;
+ }
+
+ if (test_bit(level, chip->irq_trig_low))
+ while (!cy8c95x0_gpio_get_value(gc, level))
+ handle_nested_irq(nested_irq);
+ else if (test_bit(level, chip->irq_trig_high))
+ while (cy8c95x0_gpio_get_value(gc, level))
+ handle_nested_irq(nested_irq);
+ else
+ handle_nested_irq(nested_irq);
+
+ ret = 1;
+ }
+
+ return IRQ_RETVAL(ret);
+}
+
+static int cy8c95x0_pinctrl_get_groups_count(struct pinctrl_dev *pctldev)
+{
+ struct cy8c95x0_pinctrl *chip = pinctrl_dev_get_drvdata(pctldev);
+
+ return chip->tpin;
+}
+
+static const char *cy8c95x0_pinctrl_get_group_name(struct pinctrl_dev *pctldev,
+ unsigned int group)
+{
+ return cy8c95x0_groups[group];
+}
+
+static int cy8c95x0_pinctrl_get_group_pins(struct pinctrl_dev *pctldev,
+ unsigned int group,
+ const unsigned int **pins,
+ unsigned int *num_pins)
+{
+ *pins = &cy8c9560_pins[group].number;
+ *num_pins = 1;
+ return 0;
+}
+
+static const char *cy8c95x0_get_fname(unsigned int selector)
+{
+ if (selector == 0)
+ return "gpio";
+ else
+ return "pwm";
+}
+
+static void cy8c95x0_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s,
+ unsigned int pin)
+{
+ struct cy8c95x0_pinctrl *chip = pinctrl_dev_get_drvdata(pctldev);
+ DECLARE_BITMAP(mask, MAX_LINE);
+ DECLARE_BITMAP(pwm, MAX_LINE);
+
+ bitmap_zero(mask, MAX_LINE);
+ __set_bit(pin, mask);
+
+ if (cy8c95x0_read_regs_mask(chip, CY8C95X0_PWMSEL, pwm, mask)) {
+ seq_puts(s, "not available");
+ return;
+ }
+
+ seq_printf(s, "MODE:%s", cy8c95x0_get_fname(test_bit(pin, pwm)));
+}
+
+static const struct pinctrl_ops cy8c95x0_pinctrl_ops = {
+ .get_groups_count = cy8c95x0_pinctrl_get_groups_count,
+ .get_group_name = cy8c95x0_pinctrl_get_group_name,
+ .get_group_pins = cy8c95x0_pinctrl_get_group_pins,
+#ifdef CONFIG_OF
+ .dt_node_to_map = pinconf_generic_dt_node_to_map_pin,
+ .dt_free_map = pinconf_generic_dt_free_map,
+#endif
+ .pin_dbg_show = cy8c95x0_pin_dbg_show,
+};
+
+static const char *cy8c95x0_get_function_name(struct pinctrl_dev *pctldev, unsigned int selector)
+{
+ return cy8c95x0_get_fname(selector);
+}
+
+static int cy8c95x0_get_functions_count(struct pinctrl_dev *pctldev)
+{
+ return 2;
+}
+
+static int cy8c95x0_get_function_groups(struct pinctrl_dev *pctldev, unsigned int selector,
+ const char * const **groups,
+ unsigned int * const num_groups)
+{
+ struct cy8c95x0_pinctrl *chip = pinctrl_dev_get_drvdata(pctldev);
+
+ *groups = cy8c95x0_groups;
+ *num_groups = chip->tpin;
+ return 0;
+}
+
+static int cy8c95x0_set_mode(struct cy8c95x0_pinctrl *chip, unsigned int off, bool mode)
+{
+ u8 port = cypress_get_port(chip, off);
+ u8 bit = cypress_get_pin_mask(chip, off);
+ int ret;
+
+ /* Select port */
+ ret = regmap_write(chip->regmap, CY8C95X0_PORTSEL, port);
+ if (ret < 0)
+ return ret;
+
+ return regmap_write_bits(chip->regmap, CY8C95X0_PWMSEL, bit, mode ? bit : 0);
+}
+
+static int cy8c95x0_pinmux_mode(struct cy8c95x0_pinctrl *chip,
+ unsigned int selector, unsigned int group)
+{
+ u8 port = cypress_get_port(chip, group);
+ u8 bit = cypress_get_pin_mask(chip, group);
+ int ret;
+
+ ret = cy8c95x0_set_mode(chip, group, selector);
+ if (ret < 0)
+ return ret;
+
+ if (selector == 0)
+ return 0;
+
+ /* Set direction to output & set output to 1 so that PWM can work */
+ ret = regmap_write_bits(chip->regmap, CY8C95X0_DIRECTION, bit, bit);
+ if (ret < 0)
+ return ret;
+
+ return regmap_write_bits(chip->regmap, CY8C95X0_OUTPUT_(port), bit, bit);
+}
+
+static int cy8c95x0_set_mux(struct pinctrl_dev *pctldev, unsigned int selector,
+ unsigned int group)
+{
+ struct cy8c95x0_pinctrl *chip = pinctrl_dev_get_drvdata(pctldev);
+ int ret;
+
+ mutex_lock(&chip->i2c_lock);
+ ret = cy8c95x0_pinmux_mode(chip, selector, group);
+ mutex_unlock(&chip->i2c_lock);
+
+ return ret;
+}
+
+static int cy8c95x0_gpio_request_enable(struct pinctrl_dev *pctldev,
+ struct pinctrl_gpio_range *range,
+ unsigned int pin)
+{
+ struct cy8c95x0_pinctrl *chip = pinctrl_dev_get_drvdata(pctldev);
+ int ret;
+
+ mutex_lock(&chip->i2c_lock);
+ ret = cy8c95x0_set_mode(chip, pin, false);
+ mutex_unlock(&chip->i2c_lock);
+
+ return ret;
+}
+
+static int cy8c95x0_pinmux_direction(struct cy8c95x0_pinctrl *chip,
+ unsigned int pin, bool input)
+{
+ u8 port = cypress_get_port(chip, pin);
+ u8 bit = cypress_get_pin_mask(chip, pin);
+ int ret;
+
+ /* Select port... */
+ ret = regmap_write(chip->regmap, CY8C95X0_PORTSEL, port);
+ if (ret)
+ return ret;
+
+ /* ...then direction */
+ ret = regmap_write_bits(chip->regmap, CY8C95X0_DIRECTION, bit, input ? bit : 0);
+ if (ret)
+ return ret;
+
+ /*
+ * Disable driving the pin by forcing it to HighZ. Only setting
+ * the direction register isn't sufficient in Push-Pull mode.
+ */
+ if (input && test_bit(pin, chip->push_pull)) {
+ ret = regmap_write_bits(chip->regmap, CY8C95X0_DRV_HIZ, bit, bit);
+ if (ret)
+ return ret;
+
+ __clear_bit(pin, chip->push_pull);
+ }
+
+ return 0;
+}
+
+static int cy8c95x0_gpio_set_direction(struct pinctrl_dev *pctldev,
+ struct pinctrl_gpio_range *range,
+ unsigned int pin, bool input)
+{
+ struct cy8c95x0_pinctrl *chip = pinctrl_dev_get_drvdata(pctldev);
+ int ret;
+
+ mutex_lock(&chip->i2c_lock);
+ ret = cy8c95x0_pinmux_direction(chip, pin, input);
+ mutex_unlock(&chip->i2c_lock);
+
+ return ret;
+}
+
+static const struct pinmux_ops cy8c95x0_pmxops = {
+ .get_functions_count = cy8c95x0_get_functions_count,
+ .get_function_name = cy8c95x0_get_function_name,
+ .get_function_groups = cy8c95x0_get_function_groups,
+ .set_mux = cy8c95x0_set_mux,
+ .gpio_request_enable = cy8c95x0_gpio_request_enable,
+ .gpio_set_direction = cy8c95x0_gpio_set_direction,
+ .strict = true,
+};
+
+static int cy8c95x0_pinconf_get(struct pinctrl_dev *pctldev, unsigned int pin,
+ unsigned long *config)
+{
+ struct cy8c95x0_pinctrl *chip = pinctrl_dev_get_drvdata(pctldev);
+
+ return cy8c95x0_gpio_get_pincfg(chip, pin, config);
+}
+
+static int cy8c95x0_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
+ unsigned long *configs, unsigned int num_configs)
+{
+ struct cy8c95x0_pinctrl *chip = pinctrl_dev_get_drvdata(pctldev);
+ int ret = 0;
+ int i;
+
+ for (i = 0; i < num_configs; i++) {
+ ret = cy8c95x0_gpio_set_pincfg(chip, pin, configs[i]);
+ if (ret)
+ return ret;
+ }
+
+ return ret;
+}
+
+static const struct pinconf_ops cy8c95x0_pinconf_ops = {
+ .pin_config_get = cy8c95x0_pinconf_get,
+ .pin_config_set = cy8c95x0_pinconf_set,
+ .is_generic = true,
+};
+
+static int cy8c95x0_irq_setup(struct cy8c95x0_pinctrl *chip, int irq)
+{
+ struct gpio_irq_chip *girq = &chip->gpio_chip.irq;
+ DECLARE_BITMAP(pending_irqs, MAX_LINE);
+ int ret;
+
+ mutex_init(&chip->irq_lock);
+
+ bitmap_zero(pending_irqs, MAX_LINE);
+
+ /* Read IRQ status register to clear all pending interrupts */
+ ret = cy8c95x0_irq_pending(chip, pending_irqs);
+ if (ret) {
+ dev_err(chip->dev, "failed to clear irq status register\n");
+ return ret;
+ }
+
+ /* Mask all interrupts */
+ bitmap_fill(chip->irq_mask, MAX_LINE);
+
+ gpio_irq_chip_set_chip(girq, &cy8c95x0_irqchip);
+
+ /* This will let us handle the parent IRQ in the driver */
+ girq->parent_handler = NULL;
+ girq->num_parents = 0;
+ girq->parents = NULL;
+ girq->default_type = IRQ_TYPE_NONE;
+ girq->handler = handle_simple_irq;
+ girq->threaded = true;
+
+ ret = devm_request_threaded_irq(chip->dev, irq,
+ NULL, cy8c95x0_irq_handler,
+ IRQF_ONESHOT | IRQF_SHARED | IRQF_TRIGGER_HIGH,
+ dev_name(chip->dev), chip);
+ if (ret) {
+ dev_err(chip->dev, "failed to request irq %d\n", irq);
+ return ret;
+ }
+ dev_info(chip->dev, "Registered threaded IRQ\n");
+
+ return 0;
+}
+
+static int cy8c95x0_setup_pinctrl(struct cy8c95x0_pinctrl *chip)
+{
+ struct pinctrl_desc *pd = &chip->pinctrl_desc;
+
+ pd->pctlops = &cy8c95x0_pinctrl_ops;
+ pd->confops = &cy8c95x0_pinconf_ops;
+ pd->pmxops = &cy8c95x0_pmxops;
+ pd->name = dev_name(chip->dev);
+ pd->pins = cy8c9560_pins;
+ pd->npins = chip->tpin;
+ pd->owner = THIS_MODULE;
+
+ chip->pctldev = devm_pinctrl_register(chip->dev, pd, chip);
+ if (IS_ERR(chip->pctldev))
+ return dev_err_probe(chip->dev, PTR_ERR(chip->pctldev),
+ "can't register controller\n");
+
+ return 0;
+}
+
+static int cy8c95x0_detect(struct i2c_client *client,
+ struct i2c_board_info *info)
+{
+ struct i2c_adapter *adapter = client->adapter;
+ int ret;
+ const char *name;
+
+ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
+ return -ENODEV;
+
+ ret = i2c_smbus_read_byte_data(client, CY8C95X0_DEVID);
+ if (ret < 0)
+ return ret;
+ switch (ret & GENMASK(7, 4)) {
+ case 0x20:
+ name = cy8c95x0_id[0].name;
+ break;
+ case 0x40:
+ name = cy8c95x0_id[1].name;
+ break;
+ case 0x60:
+ name = cy8c95x0_id[2].name;
+ break;
+ default:
+ return -ENODEV;
+ }
+
+ dev_info(&client->dev, "Found a %s chip at 0x%02x.\n", name, client->addr);
+ strscpy(info->type, name, I2C_NAME_SIZE);
+
+ return 0;
+}
+
+static int cy8c95x0_probe(struct i2c_client *client)
+{
+ struct cy8c95x0_pinctrl *chip;
+ struct regulator *reg;
+ int ret;
+
+ chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
+ if (!chip)
+ return -ENOMEM;
+
+ chip->dev = &client->dev;
+
+ /* Set the device type */
+ chip->driver_data = (unsigned long)device_get_match_data(&client->dev);
+ if (!chip->driver_data)
+ chip->driver_data = i2c_match_id(cy8c95x0_id, client)->driver_data;
+ if (!chip->driver_data)
+ return -ENODEV;
+
+ i2c_set_clientdata(client, chip);
+
+ chip->tpin = chip->driver_data & CY8C95X0_GPIO_MASK;
+ chip->nport = DIV_ROUND_UP(CY8C95X0_PIN_TO_OFFSET(chip->tpin), BANK_SZ);
+
+ switch (chip->tpin) {
+ case 20:
+ strscpy(chip->name, cy8c95x0_id[0].name, I2C_NAME_SIZE);
+ break;
+ case 40:
+ strscpy(chip->name, cy8c95x0_id[1].name, I2C_NAME_SIZE);
+ break;
+ case 60:
+ strscpy(chip->name, cy8c95x0_id[2].name, I2C_NAME_SIZE);
+ break;
+ default:
+ return -ENODEV;
+ }
+
+ reg = devm_regulator_get(&client->dev, "vdd");
+ if (IS_ERR(reg)) {
+ if (PTR_ERR(reg) == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+ } else {
+ ret = regulator_enable(reg);
+ if (ret) {
+ dev_err(&client->dev, "failed to enable regulator vdd: %d\n", ret);
+ return ret;
+ }
+ chip->regulator = reg;
+ }
+
+ /* bring the chip out of reset if reset pin is provided */
+ chip->gpio_reset = devm_gpiod_get_optional(&client->dev, "reset", GPIOD_OUT_HIGH);
+ if (IS_ERR(chip->gpio_reset)) {
+ ret = dev_err_probe(chip->dev, PTR_ERR(chip->gpio_reset),
+ "Failed to get GPIO 'reset'\n");
+ goto err_exit;
+ } else if (chip->gpio_reset) {
+ usleep_range(1000, 2000);
+ gpiod_set_value_cansleep(chip->gpio_reset, 0);
+ usleep_range(250000, 300000);
+
+ gpiod_set_consumer_name(chip->gpio_reset, "CY8C95X0 RESET");
+ }
+
+ chip->regmap = devm_regmap_init_i2c(client, &cy8c95x0_i2c_regmap);
+ if (IS_ERR(chip->regmap)) {
+ ret = PTR_ERR(chip->regmap);
+ goto err_exit;
+ }
+
+ bitmap_zero(chip->push_pull, MAX_LINE);
+ bitmap_zero(chip->shiftmask, MAX_LINE);
+ bitmap_set(chip->shiftmask, 0, 20);
+ mutex_init(&chip->i2c_lock);
+
+ if (dmi_first_match(cy8c95x0_dmi_acpi_irq_info)) {
+ ret = cy8c95x0_acpi_get_irq(&client->dev);
+ if (ret > 0)
+ client->irq = ret;
+ }
+
+ if (client->irq) {
+ ret = cy8c95x0_irq_setup(chip, client->irq);
+ if (ret)
+ goto err_exit;
+ }
+
+ ret = cy8c95x0_setup_pinctrl(chip);
+ if (ret)
+ goto err_exit;
+
+ ret = cy8c95x0_setup_gpiochip(chip);
+ if (ret)
+ goto err_exit;
+
+ return 0;
+
+err_exit:
+ if (!IS_ERR_OR_NULL(chip->regulator))
+ regulator_disable(chip->regulator);
+ return ret;
+}
+
+static void cy8c95x0_remove(struct i2c_client *client)
+{
+ struct cy8c95x0_pinctrl *chip = i2c_get_clientdata(client);
+
+ if (!IS_ERR_OR_NULL(chip->regulator))
+ regulator_disable(chip->regulator);
+}
+
+static const struct acpi_device_id cy8c95x0_acpi_ids[] = {
+ { "INT3490", 40, },
+ { }
+};
+MODULE_DEVICE_TABLE(acpi, cy8c95x0_acpi_ids);
+
+static struct i2c_driver cy8c95x0_driver = {
+ .driver = {
+ .name = "cy8c95x0-pinctrl",
+ .of_match_table = cy8c95x0_dt_ids,
+ .acpi_match_table = cy8c95x0_acpi_ids,
+ },
+ .probe = cy8c95x0_probe,
+ .remove = cy8c95x0_remove,
+ .id_table = cy8c95x0_id,
+ .detect = cy8c95x0_detect,
+};
+module_i2c_driver(cy8c95x0_driver);
+
+MODULE_AUTHOR("Patrick Rudolph <patrick.rudolph@9elements.com>");
+MODULE_AUTHOR("Naresh Solanki <naresh.solanki@9elements.com>");
+MODULE_DESCRIPTION("Pinctrl driver for CY8C95X0");
+MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-05 21:23:55 +0000