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Diffstat (limited to 'drivers/gpio/gpio-i8255.h')
| -rw-r--r-- | drivers/gpio/gpio-i8255.h | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/drivers/gpio/gpio-i8255.h b/drivers/gpio/gpio-i8255.h index d9084aae9446..3daa0b145890 100644 --- a/drivers/gpio/gpio-i8255.h +++ b/drivers/gpio/gpio-i8255.h @@ -26,6 +26,34 @@ struct i8255_state { u8 control_state; }; +struct device; +struct irq_domain; +struct regmap; + +#define i8255_volatile_regmap_range(_base) regmap_reg_range(_base, _base + 0x2) + +/** + * struct i8255_regmap_config - Configuration for the register map of an i8255 + * @parent: parent device + * @map: regmap for the i8255 + * @num_ppi: number of i8255 Programmable Peripheral Interface + * @names: (optional) array of names for gpios + * @domain: (optional) IRQ domain if the controller is interrupt-capable + * + * Note: The regmap is expected to have cache enabled and i8255 control + * registers not marked as volatile. + */ +struct i8255_regmap_config { + struct device *parent; + struct regmap *map; + int num_ppi; + const char *const *names; + struct irq_domain *domain; +}; + +int devm_i8255_regmap_register(struct device *dev, + const struct i8255_regmap_config *config); + void i8255_direction_input(struct i8255 __iomem *ppi, struct i8255_state *state, unsigned long offset); void i8255_direction_output(struct i8255 __iomem *ppi, |