// SPDX-License-Identifier: GPL-2.0-only /* Copyright (C) 2015 Broadcom Corporation * * This file contains the Northstar plus (NSP) IOMUX driver that supports * group based PINMUX configuration. The Northstar plus IOMUX controller * allows pins to be individually muxed to GPIO function. The NAND and MMC is * a group based selection. The gpio_a 8 - 11 are muxed with gpio_b and pwm. * To select PWM, one need to enable the corresponding gpio_b as well. * * gpio_a (8 - 11) * +---------- * | * gpio_a (8-11) | gpio_b (0 - 3) * ------------------------+-------+---------- * | * | pwm (0 - 3) * +---------- */ #include <linux/err.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 "../pinctrl-utils.h" #define NSP_MUX_BASE0 … #define NSP_MUX_BASE1 … #define NSP_MUX_BASE2 … /* * nsp IOMUX register description * * @base: base 0 or base 1 * @shift: bit shift for mux configuration of a group * @mask: bit mask of the function * @alt: alternate function to set to */ struct nsp_mux { … }; /* * Keep track of nsp IOMUX configuration and prevent double configuration * * @nsp_mux: nsp IOMUX register description * @is_configured: flag to indicate whether a mux setting has already been * configured */ struct nsp_mux_log { … }; /* * Group based IOMUX configuration * * @name: name of the group * @pins: array of pins used by this group * @num_pins: total number of pins used by this group * @mux: nsp group based IOMUX configuration */ struct nsp_pin_group { … }; /* * nsp mux function and supported pin groups * * @name: name of the function * @groups: array of groups that can be supported by this function * @num_groups: total number of groups that can be supported by this function */ struct nsp_pin_function { … }; /* * nsp IOMUX pinctrl core * * @pctl: pointer to pinctrl_dev * @dev: pointer to device * @base0: first mux register * @base1: second mux register * @base2: third mux register * @groups: pointer to array of groups * @num_groups: total number of groups * @functions: pointer to array of functions * @num_functions: total number of functions * @mux_log: pointer to the array of mux logs * @lock: lock to protect register access */ struct nsp_pinctrl { … }; /* * Description of a pin in nsp * * @pin: pin number * @name: pin name * @gpio_select: reg data to select GPIO */ struct nsp_pin { … }; #define NSP_PIN_DESC(p, n, g) … /* * List of muxable pins in nsp */ static struct nsp_pin nsp_pins[] = …; /* * List of groups of pins */ static const unsigned int spi_pins[] = …; static const unsigned int i2c_pins[] = …; static const unsigned int mdio_pins[] = …; static const unsigned int pwm0_pins[] = …; static const unsigned int gpio_b_0_pins[] = …; static const unsigned int pwm1_pins[] = …; static const unsigned int gpio_b_1_pins[] = …; static const unsigned int pwm2_pins[] = …; static const unsigned int gpio_b_2_pins[] = …; static const unsigned int pwm3_pins[] = …; static const unsigned int gpio_b_3_pins[] = …; static const unsigned int uart1_pins[] = …; static const unsigned int uart2_pins[] = …; static const unsigned int synce_pins[] = …; static const unsigned int sata0_led_pins[] = …; static const unsigned int sata1_led_pins[] = …; static const unsigned int xtal_out_pins[] = …; static const unsigned int sdio_pwr_pins[] = …; static const unsigned int sdio_1p8v_pins[] = …; static const unsigned int switch_p05_led0_pins[] = …; static const unsigned int switch_p05_led1_pins[] = …; static const unsigned int nand_pins[] = …; static const unsigned int emmc_pins[] = …; #define NSP_PIN_GROUP(group_name, ba, sh, ma, al) … /* * List of nsp pin groups */ static const struct nsp_pin_group nsp_pin_groups[] = …; /* * List of groups supported by functions */ static const char * const spi_grps[] = …; static const char * const i2c_grps[] = …; static const char * const mdio_grps[] = …; static const char * const pwm_grps[] = …; static const char * const gpio_b_grps[] = …; static const char * const uart1_grps[] = …; static const char * const uart2_grps[] = …; static const char * const synce_grps[] = …; static const char * const sata_led_grps[] = …; static const char * const xtal_out_grps[] = …; static const char * const sdio_grps[] = …; static const char * const switch_led_grps[] = …; static const char * const nand_grps[] = …; static const char * const emmc_grps[] = …; #define NSP_PIN_FUNCTION(func) … /* * List of supported functions in nsp */ static const struct nsp_pin_function nsp_pin_functions[] = …; static int nsp_get_groups_count(struct pinctrl_dev *pctrl_dev) { … } static const char *nsp_get_group_name(struct pinctrl_dev *pctrl_dev, unsigned int selector) { … } static int nsp_get_group_pins(struct pinctrl_dev *pctrl_dev, unsigned int selector, const unsigned int **pins, unsigned int *num_pins) { … } static void nsp_pin_dbg_show(struct pinctrl_dev *pctrl_dev, struct seq_file *s, unsigned int offset) { … } static const struct pinctrl_ops nsp_pinctrl_ops = …; static int nsp_get_functions_count(struct pinctrl_dev *pctrl_dev) { … } static const char *nsp_get_function_name(struct pinctrl_dev *pctrl_dev, unsigned int selector) { … } static int nsp_get_function_groups(struct pinctrl_dev *pctrl_dev, unsigned int selector, const char * const **groups, unsigned * const num_groups) { … } static int nsp_pinmux_set(struct nsp_pinctrl *pinctrl, const struct nsp_pin_function *func, const struct nsp_pin_group *grp, struct nsp_mux_log *mux_log) { … } static int nsp_pinmux_enable(struct pinctrl_dev *pctrl_dev, unsigned int func_select, unsigned int grp_select) { … } static int nsp_gpio_request_enable(struct pinctrl_dev *pctrl_dev, struct pinctrl_gpio_range *range, unsigned int pin) { … } static void nsp_gpio_disable_free(struct pinctrl_dev *pctrl_dev, struct pinctrl_gpio_range *range, unsigned int pin) { … } static const struct pinmux_ops nsp_pinmux_ops = …; static struct pinctrl_desc nsp_pinctrl_desc = …; static int nsp_mux_log_init(struct nsp_pinctrl *pinctrl) { … } static int nsp_pinmux_probe(struct platform_device *pdev) { … } static const struct of_device_id nsp_pinmux_of_match[] = …; static struct platform_driver nsp_pinmux_driver = …; static int __init nsp_pinmux_init(void) { … } arch_initcall(nsp_pinmux_init);
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