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Diffstat (limited to 'drivers/pinctrl/meson/pinctrl-meson.h')
| -rw-r--r-- | drivers/pinctrl/meson/pinctrl-meson.h | 209 |
1 files changed, 209 insertions, 0 deletions
diff --git a/drivers/pinctrl/meson/pinctrl-meson.h b/drivers/pinctrl/meson/pinctrl-meson.h new file mode 100644 index 000000000000..bfea8adc7953 --- /dev/null +++ b/drivers/pinctrl/meson/pinctrl-meson.h @@ -0,0 +1,209 @@ +/* + * Pin controller and GPIO driver for Amlogic Meson SoCs + * + * Copyright (C) 2014 Beniamino Galvani <b.galvani@gmail.com> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * version 2 as published by the Free Software Foundation. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <linux/gpio.h> +#include <linux/pinctrl/pinctrl.h> +#include <linux/regmap.h> +#include <linux/types.h> + +/** + * struct meson_pmx_group - a pinmux group + * + * @name: group name + * @pins: pins in the group + * @num_pins: number of pins in the group + * @is_gpio: whether the group is a single GPIO group + * @reg: register offset for the group in the domain mux registers + * @bit bit index enabling the group + * @domain: index of the domain this group belongs to + */ +struct meson_pmx_group { + const char *name; + const unsigned int *pins; + unsigned int num_pins; + bool is_gpio; + unsigned int reg; + unsigned int bit; + unsigned int domain; +}; + +/** + * struct meson_pmx_func - a pinmux function + * + * @name: function name + * @groups: groups in the function + * @num_groups: number of groups in the function + */ +struct meson_pmx_func { + const char *name; + const char * const *groups; + unsigned int num_groups; +}; + +/** + * struct meson_reg_desc - a register descriptor + * + * @reg: register offset in the regmap + * @bit: bit index in register + * + * The structure describes the information needed to control pull, + * pull-enable, direction, etc. for a single pin + */ +struct meson_reg_desc { + unsigned int reg; + unsigned int bit; +}; + +/** + * enum meson_reg_type - type of registers encoded in @meson_reg_desc + */ +enum meson_reg_type { + REG_PULLEN, + REG_PULL, + REG_DIR, + REG_OUT, + REG_IN, + NUM_REG, +}; + +/** + * struct meson bank + * + * @name: bank name + * @first: first pin of the bank + * @last: last pin of the bank + * @regs: array of register descriptors + * + * A bank represents a set of pins controlled by a contiguous set of + * bits in the domain registers. The structure specifies which bits in + * the regmap control the different functionalities. Each member of + * the @regs array refers to the first pin of the bank. + */ +struct meson_bank { + const char *name; + unsigned int first; + unsigned int last; + struct meson_reg_desc regs[NUM_REG]; +}; + +/** + * struct meson_domain_data - domain platform data + * + * @name: name of the domain + * @banks: set of banks belonging to the domain + * @num_banks: number of banks in the domain + */ +struct meson_domain_data { + const char *name; + struct meson_bank *banks; + unsigned int num_banks; + unsigned int pin_base; + unsigned int num_pins; +}; + +/** + * struct meson_domain + * + * @reg_mux: registers for mux settings + * @reg_pullen: registers for pull-enable settings + * @reg_pull: registers for pull settings + * @reg_gpio: registers for gpio settings + * @chip: gpio chip associated with the domain + * @data; platform data for the domain + * @node: device tree node for the domain + * + * A domain represents a set of banks controlled by the same set of + * registers. + */ +struct meson_domain { + struct regmap *reg_mux; + struct regmap *reg_pullen; + struct regmap *reg_pull; + struct regmap *reg_gpio; + + struct gpio_chip chip; + struct meson_domain_data *data; + struct device_node *of_node; +}; + +struct meson_pinctrl_data { + const struct pinctrl_pin_desc *pins; + struct meson_pmx_group *groups; + struct meson_pmx_func *funcs; + struct meson_domain_data *domain_data; + unsigned int num_pins; + unsigned int num_groups; + unsigned int num_funcs; + unsigned int num_domains; +}; + +struct meson_pinctrl { + struct device *dev; + struct pinctrl_dev *pcdev; + struct pinctrl_desc desc; + struct meson_pinctrl_data *data; + struct meson_domain *domains; +}; + +#define GROUP(grp, r, b) \ + { \ + .name = #grp, \ + .pins = grp ## _pins, \ + .num_pins = ARRAY_SIZE(grp ## _pins), \ + .reg = r, \ + .bit = b, \ + .domain = 0, \ + } + +#define GPIO_GROUP(gpio) \ + { \ + .name = #gpio, \ + .pins = (const unsigned int[]){ PIN_ ## gpio}, \ + .num_pins = 1, \ + .is_gpio = true, \ + } + +#define GROUP_AO(grp, r, b) \ + { \ + .name = #grp, \ + .pins = grp ## _pins, \ + .num_pins = ARRAY_SIZE(grp ## _pins), \ + .reg = r, \ + .bit = b, \ + .domain = 1, \ + } + +#define FUNCTION(fn) \ + { \ + .name = #fn, \ + .groups = fn ## _groups, \ + .num_groups = ARRAY_SIZE(fn ## _groups), \ + } + +#define BANK(n, f, l, per, peb, pr, pb, dr, db, or, ob, ir, ib) \ + { \ + .name = n, \ + .first = f, \ + .last = l, \ + .regs = { \ + [REG_PULLEN] = { per, peb }, \ + [REG_PULL] = { pr, pb }, \ + [REG_DIR] = { dr, db }, \ + [REG_OUT] = { or, ob }, \ + [REG_IN] = { ir, ib }, \ + }, \ + } + +#define MESON_PIN(x) PINCTRL_PIN(PIN_ ## x, #x) + +extern struct meson_pinctrl_data meson8_pinctrl_data; |