// SPDX-License-Identifier: GPL-2.0-only /* * CY8C95X0 20/40/60 pin I2C GPIO port expander with interrupt support * * Copyright (C) 2022 9elements GmbH * Author: Patrick Rudolph * Author: Naresh Solanki */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* 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); #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; }; 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 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; } 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), 0xff }, { CY8C95X0_OUTPUT_(1), 0xff }, { CY8C95X0_OUTPUT_(2), 0xff }, { CY8C95X0_OUTPUT_(3), 0xff }, { CY8C95X0_OUTPUT_(4), 0xff }, { CY8C95X0_OUTPUT_(5), 0xff }, { CY8C95X0_OUTPUT_(6), 0xff }, { CY8C95X0_OUTPUT_(7), 0xff }, { 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) { struct cy8c95x0_pinctrl *chip = gpiochip_get_data(gc); u8 port = cypress_get_port(chip, off); u8 bit = cypress_get_pin_mask(chip, off); int ret; mutex_lock(&chip->i2c_lock); ret = regmap_write(chip->regmap, CY8C95X0_PORTSEL, port); if (ret) goto out; ret = regmap_write_bits(chip->regmap, CY8C95X0_DIRECTION, bit, bit); if (ret) goto out; if (test_bit(off, chip->push_pull)) { /* * Disable driving the pin by forcing it to HighZ. Only setting the * direction register isn't sufficient in Push-Pull mode. */ ret = regmap_write_bits(chip->regmap, CY8C95X0_DRV_HIZ, bit, bit); if (ret) goto out; clear_bit(off, chip->push_pull); } out: mutex_unlock(&chip->i2c_lock); return ret; } 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; mutex_lock(&chip->i2c_lock); /* select port */ ret = regmap_write(chip->regmap, CY8C95X0_PORTSEL, port); if (ret) goto out; /* then direction */ ret = regmap_write_bits(chip->regmap, CY8C95X0_DIRECTION, bit, 0); out: mutex_unlock(&chip->i2c_lock); return ret; } 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, ®_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, ®_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, ®_val); if (reg_val & bit) arg = 1; *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 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; 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->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_functions_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_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_pinmux_cfg(struct cy8c95x0_pinctrl *chip, unsigned int val, unsigned long off) { 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; ret = regmap_write_bits(chip->regmap, CY8C95X0_PWMSEL, bit, val ? bit : 0); if (ret < 0) return ret; /* 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); return cy8c95x0_pinmux_cfg(chip, selector, group); } static const struct pinmux_ops cy8c95x0_pmxops = { .get_functions_count = cy8c95x0_get_functions_count, .get_function_name = cy8c95x0_get_functions_name, .get_function_groups = cy8c95x0_get_groups, .set_mux = cy8c95x0_set_mux, .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 & 0xf0) { 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; } 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 (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_new = cy8c95x0_probe, .remove = cy8c95x0_remove, .id_table = cy8c95x0_id, .detect = cy8c95x0_detect, }; module_i2c_driver(cy8c95x0_driver); MODULE_AUTHOR("Patrick Rudolph "); MODULE_AUTHOR("Naresh Solanki "); MODULE_DESCRIPTION("Pinctrl driver for CY8C95X0"); MODULE_LICENSE("GPL");