// SPDX-License-Identifier: GPL-2.0 // Copyright (c) 2016-2018 Nuvoton Technology corporation. // Copyright (c) 2016, Dell Inc // Copyright (c) 2021-2022 Jonathan Neuschäfer // // This driver uses the following registers: // - Pin mux registers, in the GCR (general control registers) block // - GPIO registers, specific to each GPIO bank // - GPIO event (interrupt) registers, located centrally in the GPIO register // block, shared between all GPIO banks #include <linux/device.h> #include <linux/fwnode.h> #include <linux/gpio/driver.h> #include <linux/interrupt.h> #include <linux/irq.h> #include <linux/mfd/syscon.h> #include <linux/module.h> #include <linux/mod_devicetable.h> #include <linux/platform_device.h> #include <linux/regmap.h> #include <linux/pinctrl/pinconf.h> #include <linux/pinctrl/pinconf-generic.h> #include <linux/pinctrl/pinctrl.h> #include <linux/pinctrl/pinmux.h> #include "../core.h" /* GCR registers */ #define WPCM450_GCR_MFSEL1 … #define WPCM450_GCR_MFSEL2 … #define WPCM450_GCR_NONE … /* GPIO event (interrupt) registers */ #define WPCM450_GPEVTYPE … #define WPCM450_GPEVPOL … #define WPCM450_GPEVDBNC … #define WPCM450_GPEVEN … #define WPCM450_GPEVST … #define WPCM450_NUM_BANKS … #define WPCM450_NUM_GPIOS … #define WPCM450_NUM_GPIO_IRQS … struct wpcm450_pinctrl; struct wpcm450_bank; struct wpcm450_gpio { … }; struct wpcm450_pinctrl { … }; struct wpcm450_bank { … }; static const struct wpcm450_bank wpcm450_banks[WPCM450_NUM_BANKS] = …; static int wpcm450_gpio_irq_bitnum(struct wpcm450_gpio *gpio, struct irq_data *d) { … } static int wpcm450_irq_bitnum_to_gpio(struct wpcm450_gpio *gpio, int bitnum) { … } static void wpcm450_gpio_irq_ack(struct irq_data *d) { … } static void wpcm450_gpio_irq_mask(struct irq_data *d) { … } static void wpcm450_gpio_irq_unmask(struct irq_data *d) { … } /* * This is an implementation of the gpio_chip->get() function, for use in * wpcm450_gpio_fix_evpol. Unfortunately, we can't use the bgpio-provided * implementation there, because it would require taking gpio_chip->bgpio_lock, * which is a spin lock, but wpcm450_gpio_fix_evpol must work in contexts where * a raw spin lock is held. */ static int wpcm450_gpio_get(struct wpcm450_gpio *gpio, int offset) { … } /* * Since the GPIO controller does not support dual-edge triggered interrupts * (IRQ_TYPE_EDGE_BOTH), they are emulated using rising/falling edge triggered * interrupts. wpcm450_gpio_fix_evpol sets the interrupt polarity for the * specified emulated dual-edge triggered interrupts, so that the next edge can * be detected. */ static void wpcm450_gpio_fix_evpol(struct wpcm450_gpio *gpio, unsigned long all) { … } static int wpcm450_gpio_set_irq_type(struct irq_data *d, unsigned int flow_type) { … } static const struct irq_chip wpcm450_gpio_irqchip = …; static void wpcm450_gpio_irqhandler(struct irq_desc *desc) { … } static int smb0_pins[] = …; static int smb1_pins[] = …; static int smb2_pins[] = …; static int smb3_pins[] = …; static int smb4_pins[] = …; static int smb5_pins[] = …; static int scs1_pins[] = …; static int scs2_pins[] = …; static int scs3_pins[] = …; static int bsp_pins[] = …; static int hsp1_pins[] = …; static int hsp2_pins[] = …; static int r1err_pins[] = …; static int r1md_pins[] = …; static int rmii2_pins[] = …; static int r2err_pins[] = …; static int r2md_pins[] = …; static int kbcc_pins[] = …; static int clko_pins[] = …; static int smi_pins[] = …; static int uinc_pins[] = …; static int mben_pins[] = …; static int gspi_pins[] = …; static int sspi_pins[] = …; static int xcs1_pins[] = …; static int xcs2_pins[] = …; static int sdio_pins[] = …; static int fi0_pins[] = …; static int fi1_pins[] = …; static int fi2_pins[] = …; static int fi3_pins[] = …; static int fi4_pins[] = …; static int fi5_pins[] = …; static int fi6_pins[] = …; static int fi7_pins[] = …; static int fi8_pins[] = …; static int fi9_pins[] = …; static int fi10_pins[] = …; static int fi11_pins[] = …; static int fi12_pins[] = …; static int fi13_pins[] = …; static int fi14_pins[] = …; static int fi15_pins[] = …; static int pwm0_pins[] = …; static int pwm1_pins[] = …; static int pwm2_pins[] = …; static int pwm3_pins[] = …; static int pwm4_pins[] = …; static int pwm5_pins[] = …; static int pwm6_pins[] = …; static int pwm7_pins[] = …; static int hg0_pins[] = …; static int hg1_pins[] = …; static int hg2_pins[] = …; static int hg3_pins[] = …; static int hg4_pins[] = …; static int hg5_pins[] = …; static int hg6_pins[] = …; static int hg7_pins[] = …; #define WPCM450_GRPS … \ enum { … }; static const struct pingroup wpcm450_groups[] = …; #define WPCM450_SFUNC(a) … #define WPCM450_FUNC(a, b...) … #define WPCM450_MKFUNC(nm) … struct wpcm450_func { … }; WPCM450_SFUNC(smb3); WPCM450_SFUNC(smb4); WPCM450_SFUNC(smb5); WPCM450_SFUNC(scs1); WPCM450_SFUNC(scs2); WPCM450_SFUNC(scs3); WPCM450_SFUNC(smb0); WPCM450_SFUNC(smb1); WPCM450_SFUNC(smb2); WPCM450_SFUNC(bsp); WPCM450_SFUNC(hsp1); WPCM450_SFUNC(hsp2); WPCM450_SFUNC(r1err); WPCM450_SFUNC(r1md); WPCM450_SFUNC(rmii2); WPCM450_SFUNC(r2err); WPCM450_SFUNC(r2md); WPCM450_SFUNC(kbcc); WPCM450_SFUNC(clko); WPCM450_SFUNC(smi); WPCM450_SFUNC(uinc); WPCM450_SFUNC(gspi); WPCM450_SFUNC(mben); WPCM450_SFUNC(xcs2); WPCM450_SFUNC(xcs1); WPCM450_SFUNC(sdio); WPCM450_SFUNC(sspi); WPCM450_SFUNC(fi0); WPCM450_SFUNC(fi1); WPCM450_SFUNC(fi2); WPCM450_SFUNC(fi3); WPCM450_SFUNC(fi4); WPCM450_SFUNC(fi5); WPCM450_SFUNC(fi6); WPCM450_SFUNC(fi7); WPCM450_SFUNC(fi8); WPCM450_SFUNC(fi9); WPCM450_SFUNC(fi10); WPCM450_SFUNC(fi11); WPCM450_SFUNC(fi12); WPCM450_SFUNC(fi13); WPCM450_SFUNC(fi14); WPCM450_SFUNC(fi15); WPCM450_SFUNC(pwm0); WPCM450_SFUNC(pwm1); WPCM450_SFUNC(pwm2); WPCM450_SFUNC(pwm3); WPCM450_SFUNC(pwm4); WPCM450_SFUNC(pwm5); WPCM450_SFUNC(pwm6); WPCM450_SFUNC(pwm7); WPCM450_SFUNC(hg0); WPCM450_SFUNC(hg1); WPCM450_SFUNC(hg2); WPCM450_SFUNC(hg3); WPCM450_SFUNC(hg4); WPCM450_SFUNC(hg5); WPCM450_SFUNC(hg6); WPCM450_SFUNC(hg7); #define WPCM450_GRP … WPCM450_FUNC(gpio, WPCM450_GRPS); #undef WPCM450_GRP /* Function names */ static struct wpcm450_func wpcm450_funcs[] = …; #define WPCM450_PINCFG(a, b, c, d, e, f, g) … struct wpcm450_pincfg { … }; /* Add this value to bit0 or bit1 to indicate that the MFSEL bit is inverted */ #define INV … static const struct wpcm450_pincfg pincfg[] = …; #define WPCM450_PIN(n) … static const struct pinctrl_pin_desc wpcm450_pins[] = …; /* Helper function to update MFSEL field according to the selected function */ static void wpcm450_update_mfsel(struct regmap *gcr_regmap, int reg, int bit, int fn, int fn_selected) { … } /* Enable mode in pin group */ static void wpcm450_setfunc(struct regmap *gcr_regmap, const unsigned int *pin, int npins, int func) { … } static int wpcm450_get_groups_count(struct pinctrl_dev *pctldev) { … } static const char *wpcm450_get_group_name(struct pinctrl_dev *pctldev, unsigned int selector) { … } static int wpcm450_get_group_pins(struct pinctrl_dev *pctldev, unsigned int selector, const unsigned int **pins, unsigned int *npins) { … } static void wpcm450_dt_free_map(struct pinctrl_dev *pctldev, struct pinctrl_map *map, u32 num_maps) { … } static const struct pinctrl_ops wpcm450_pinctrl_ops = …; static int wpcm450_get_functions_count(struct pinctrl_dev *pctldev) { … } static const char *wpcm450_get_function_name(struct pinctrl_dev *pctldev, unsigned int function) { … } static int wpcm450_get_function_groups(struct pinctrl_dev *pctldev, unsigned int function, const char * const **groups, unsigned int * const ngroups) { … } static int wpcm450_pinmux_set_mux(struct pinctrl_dev *pctldev, unsigned int function, unsigned int group) { … } static const struct pinmux_ops wpcm450_pinmux_ops = …; static int debounce_bitnum(int gpio) { … } static int wpcm450_config_get(struct pinctrl_dev *pctldev, unsigned int pin, unsigned long *config) { … } static int wpcm450_config_set_one(struct wpcm450_pinctrl *pctrl, unsigned int pin, unsigned long config) { … } static int wpcm450_config_set(struct pinctrl_dev *pctldev, unsigned int pin, unsigned long *configs, unsigned int num_configs) { … } static const struct pinconf_ops wpcm450_pinconf_ops = …; static struct pinctrl_desc wpcm450_pinctrl_desc = …; static int wpcm450_gpio_set_config(struct gpio_chip *chip, unsigned int offset, unsigned long config) { … } static int wpcm450_gpio_add_pin_ranges(struct gpio_chip *chip) { … } static int wpcm450_gpio_register(struct platform_device *pdev, struct wpcm450_pinctrl *pctrl) { … } static int wpcm450_pinctrl_probe(struct platform_device *pdev) { … } static const struct of_device_id wpcm450_pinctrl_match[] = …; MODULE_DEVICE_TABLE(of, wpcm450_pinctrl_match); static struct platform_driver wpcm450_pinctrl_driver = …; module_platform_driver(…) …; MODULE_LICENSE(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …;
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