// SPDX-License-Identifier: GPL-2.0-only /* * Driver for the Atmel PIO4 controller * * Copyright (C) 2015 Atmel, * 2015 Ludovic Desroches <[email protected]> */ #include <dt-bindings/pinctrl/at91.h> #include <linux/clk.h> #include <linux/gpio/driver.h> #include <linux/init.h> #include <linux/interrupt.h> #include <linux/io.h> #include <linux/of.h> #include <linux/platform_device.h> #include <linux/seq_file.h> #include <linux/slab.h> #include <linux/pinctrl/pinconf-generic.h> #include <linux/pinctrl/pinconf.h> #include <linux/pinctrl/pinctrl.h> #include <linux/pinctrl/pinmux.h> #include "core.h" #include "pinconf.h" #include "pinctrl-utils.h" /* * Warning: * In order to not introduce confusion between Atmel PIO groups and pinctrl * framework groups, Atmel PIO groups will be called banks, line is kept to * designed the pin id into this bank. */ #define ATMEL_PIO_MSKR … #define ATMEL_PIO_CFGR … #define ATMEL_PIO_CFGR_FUNC_MASK … #define ATMEL_PIO_DIR_MASK … #define ATMEL_PIO_PUEN_MASK … #define ATMEL_PIO_PDEN_MASK … #define ATMEL_PIO_SR_MASK … #define ATMEL_PIO_IFEN_MASK … #define ATMEL_PIO_IFSCEN_MASK … #define ATMEL_PIO_OPD_MASK … #define ATMEL_PIO_SCHMITT_MASK … #define ATMEL_PIO_DRVSTR_MASK … #define ATMEL_PIO_DRVSTR_OFFSET … #define ATMEL_PIO_CFGR_EVTSEL_MASK … #define ATMEL_PIO_CFGR_EVTSEL_FALLING … #define ATMEL_PIO_CFGR_EVTSEL_RISING … #define ATMEL_PIO_CFGR_EVTSEL_BOTH … #define ATMEL_PIO_CFGR_EVTSEL_LOW … #define ATMEL_PIO_CFGR_EVTSEL_HIGH … #define ATMEL_PIO_PDSR … #define ATMEL_PIO_LOCKSR … #define ATMEL_PIO_SODR … #define ATMEL_PIO_CODR … #define ATMEL_PIO_ODSR … #define ATMEL_PIO_IER … #define ATMEL_PIO_IDR … #define ATMEL_PIO_IMR … #define ATMEL_PIO_ISR … #define ATMEL_PIO_IOFR … #define ATMEL_PIO_NPINS_PER_BANK … #define ATMEL_PIO_BANK(pin_id) … #define ATMEL_PIO_LINE(pin_id) … #define ATMEL_PIO_BANK_OFFSET … #define ATMEL_GET_PIN_NO(pinfunc) … #define ATMEL_GET_PIN_FUNC(pinfunc) … #define ATMEL_GET_PIN_IOSET(pinfunc) … /* Custom pinconf parameters */ #define ATMEL_PIN_CONFIG_DRIVE_STRENGTH … /** * struct atmel_pioctrl_data - Atmel PIO controller (pinmux + gpio) data struct * @nbanks: number of PIO banks * @last_bank_count: number of lines in the last bank (can be less than * the rest of the banks). * @slew_rate_support: slew rate support */ struct atmel_pioctrl_data { … }; struct atmel_group { … }; struct atmel_pin { … }; /** * struct atmel_pioctrl - Atmel PIO controller (pinmux + gpio) * @reg_base: base address of the controller. * @clk: clock of the controller. * @nbanks: number of PIO groups, it can vary depending on the SoC. * @pinctrl_dev: pinctrl device registered. * @groups: groups table to provide group name and pin in the group to pinctrl. * @group_names: group names table to provide all the group/pin names to * pinctrl or gpio. * @pins: pins table used for both pinctrl and gpio. pin_id, bank and line * fields are set at probe time. Other ones are set when parsing dt * pinctrl. * @npins: number of pins. * @gpio_chip: gpio chip registered. * @irq_domain: irq domain for the gpio controller. * @irqs: table containing the hw irq number of the bank. The index of the * table is the bank id. * @pm_wakeup_sources: bitmap of wakeup sources (lines) * @pm_suspend_backup: backup/restore register values on suspend/resume * @dev: device entry for the Atmel PIO controller. * @node: node of the Atmel PIO controller. * @slew_rate_support: slew rate support */ struct atmel_pioctrl { … }; static const char * const atmel_functions[] = …; static const struct pinconf_generic_params atmel_custom_bindings[] = …; /* --- GPIO --- */ static unsigned int atmel_gpio_read(struct atmel_pioctrl *atmel_pioctrl, unsigned int bank, unsigned int reg) { … } static void atmel_gpio_write(struct atmel_pioctrl *atmel_pioctrl, unsigned int bank, unsigned int reg, unsigned int val) { … } static void atmel_gpio_irq_ack(struct irq_data *d) { … } static int atmel_gpio_irq_set_type(struct irq_data *d, unsigned int type) { … } static void atmel_gpio_irq_mask(struct irq_data *d) { … } static void atmel_gpio_irq_unmask(struct irq_data *d) { … } static int atmel_gpio_irq_set_wake(struct irq_data *d, unsigned int on) { … } static struct irq_chip atmel_gpio_irq_chip = …; static int atmel_gpio_to_irq(struct gpio_chip *chip, unsigned int offset) { … } static void atmel_gpio_irq_handler(struct irq_desc *desc) { … } static int atmel_gpio_direction_input(struct gpio_chip *chip, unsigned int offset) { … } static int atmel_gpio_get(struct gpio_chip *chip, unsigned int offset) { … } static int atmel_gpio_get_multiple(struct gpio_chip *chip, unsigned long *mask, unsigned long *bits) { … } static int atmel_gpio_direction_output(struct gpio_chip *chip, unsigned int offset, int value) { … } static void atmel_gpio_set(struct gpio_chip *chip, unsigned int offset, int val) { … } static void atmel_gpio_set_multiple(struct gpio_chip *chip, unsigned long *mask, unsigned long *bits) { … } static struct gpio_chip atmel_gpio_chip = …; /* --- PINCTRL --- */ static unsigned int atmel_pin_config_read(struct pinctrl_dev *pctldev, unsigned int pin_id) { … } static void atmel_pin_config_write(struct pinctrl_dev *pctldev, unsigned int pin_id, u32 conf) { … } static int atmel_pctl_get_groups_count(struct pinctrl_dev *pctldev) { … } static const char *atmel_pctl_get_group_name(struct pinctrl_dev *pctldev, unsigned int selector) { … } static int atmel_pctl_get_group_pins(struct pinctrl_dev *pctldev, unsigned int selector, const unsigned int **pins, unsigned int *num_pins) { … } static struct atmel_group * atmel_pctl_find_group_by_pin(struct pinctrl_dev *pctldev, unsigned int pin) { … } static int atmel_pctl_xlate_pinfunc(struct pinctrl_dev *pctldev, struct device_node *np, u32 pinfunc, const char **grp_name, const char **func_name) { … } static int atmel_pctl_dt_subnode_to_map(struct pinctrl_dev *pctldev, struct device_node *np, struct pinctrl_map **map, unsigned int *reserved_maps, unsigned int *num_maps) { … } static int atmel_pctl_dt_node_to_map(struct pinctrl_dev *pctldev, struct device_node *np_config, struct pinctrl_map **map, unsigned int *num_maps) { … } static const struct pinctrl_ops atmel_pctlops = …; static int atmel_pmx_get_functions_count(struct pinctrl_dev *pctldev) { … } static const char *atmel_pmx_get_function_name(struct pinctrl_dev *pctldev, unsigned int selector) { … } static int atmel_pmx_get_function_groups(struct pinctrl_dev *pctldev, unsigned int selector, const char * const **groups, unsigned * const num_groups) { … } static int atmel_pmx_set_mux(struct pinctrl_dev *pctldev, unsigned int function, unsigned int group) { … } static const struct pinmux_ops atmel_pmxops = …; static int atmel_conf_pin_config_group_get(struct pinctrl_dev *pctldev, unsigned int group, unsigned long *config) { … } static int atmel_conf_pin_config_group_set(struct pinctrl_dev *pctldev, unsigned int group, unsigned long *configs, unsigned int num_configs) { … } static int atmel_conf_pin_config_set(struct pinctrl_dev *pctldev, unsigned pin, unsigned long *configs, unsigned num_configs) { … } static int atmel_conf_pin_config_get(struct pinctrl_dev *pctldev, unsigned pin, unsigned long *configs) { … } static void atmel_conf_pin_config_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s, unsigned int pin_id) { … } static const struct pinconf_ops atmel_confops = …; static struct pinctrl_desc atmel_pinctrl_desc = …; static int __maybe_unused atmel_pctrl_suspend(struct device *dev) { … } static int __maybe_unused atmel_pctrl_resume(struct device *dev) { … } static const struct dev_pm_ops atmel_pctrl_pm_ops = …; /* * The number of banks can be different from a SoC to another one. * We can have up to 16 banks. */ static const struct atmel_pioctrl_data atmel_sama5d2_pioctrl_data = …; static const struct atmel_pioctrl_data microchip_sama7g5_pioctrl_data = …; static const struct of_device_id atmel_pctrl_of_match[] = …; /* * This lock class allows to tell lockdep that parent IRQ and children IRQ do * not share the same class so it does not raise false positive */ static struct lock_class_key atmel_lock_key; static struct lock_class_key atmel_request_key; static int atmel_pinctrl_probe(struct platform_device *pdev) { … } static struct platform_driver atmel_pinctrl_driver = …; builtin_platform_driver(…) …;
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