diff options
Diffstat (limited to 'drivers/pinctrl/nomadik/pinctrl-nomadik.h')
| -rw-r--r-- | drivers/pinctrl/nomadik/pinctrl-nomadik.h | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/drivers/pinctrl/nomadik/pinctrl-nomadik.h b/drivers/pinctrl/nomadik/pinctrl-nomadik.h new file mode 100644 index 0000000000..1ef2559bc5 --- /dev/null +++ b/drivers/pinctrl/nomadik/pinctrl-nomadik.h @@ -0,0 +1,180 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef PINCTRL_PINCTRL_NOMADIK_H +#define PINCTRL_PINCTRL_NOMADIK_H + +#include <linux/kernel.h> +#include <linux/types.h> + +#include <linux/pinctrl/pinctrl.h> + +/* Package definitions */ +#define PINCTRL_NMK_STN8815 0 +#define PINCTRL_NMK_DB8500 1 + +/* Alternate functions: function C is set in hw by setting both A and B */ +#define NMK_GPIO_ALT_GPIO 0 +#define NMK_GPIO_ALT_A 1 +#define NMK_GPIO_ALT_B 2 +#define NMK_GPIO_ALT_C (NMK_GPIO_ALT_A | NMK_GPIO_ALT_B) + +#define NMK_GPIO_ALT_CX_SHIFT 2 +#define NMK_GPIO_ALT_C1 ((1<<NMK_GPIO_ALT_CX_SHIFT) | NMK_GPIO_ALT_C) +#define NMK_GPIO_ALT_C2 ((2<<NMK_GPIO_ALT_CX_SHIFT) | NMK_GPIO_ALT_C) +#define NMK_GPIO_ALT_C3 ((3<<NMK_GPIO_ALT_CX_SHIFT) | NMK_GPIO_ALT_C) +#define NMK_GPIO_ALT_C4 ((4<<NMK_GPIO_ALT_CX_SHIFT) | NMK_GPIO_ALT_C) + +#define PRCM_GPIOCR_ALTCX(pin_num,\ + altc1_used, altc1_ri, altc1_cb,\ + altc2_used, altc2_ri, altc2_cb,\ + altc3_used, altc3_ri, altc3_cb,\ + altc4_used, altc4_ri, altc4_cb)\ +{\ + .pin = pin_num,\ + .altcx[PRCM_IDX_GPIOCR_ALTC1] = {\ + .used = altc1_used,\ + .reg_index = altc1_ri,\ + .control_bit = altc1_cb\ + },\ + .altcx[PRCM_IDX_GPIOCR_ALTC2] = {\ + .used = altc2_used,\ + .reg_index = altc2_ri,\ + .control_bit = altc2_cb\ + },\ + .altcx[PRCM_IDX_GPIOCR_ALTC3] = {\ + .used = altc3_used,\ + .reg_index = altc3_ri,\ + .control_bit = altc3_cb\ + },\ + .altcx[PRCM_IDX_GPIOCR_ALTC4] = {\ + .used = altc4_used,\ + .reg_index = altc4_ri,\ + .control_bit = altc4_cb\ + },\ +} + +/** + * enum prcm_gpiocr_reg_index + * Used to reference an PRCM GPIOCR register address. + */ +enum prcm_gpiocr_reg_index { + PRCM_IDX_GPIOCR1, + PRCM_IDX_GPIOCR2, + PRCM_IDX_GPIOCR3 +}; +/** + * enum prcm_gpiocr_altcx_index + * Used to reference an Other alternate-C function. + */ +enum prcm_gpiocr_altcx_index { + PRCM_IDX_GPIOCR_ALTC1, + PRCM_IDX_GPIOCR_ALTC2, + PRCM_IDX_GPIOCR_ALTC3, + PRCM_IDX_GPIOCR_ALTC4, + PRCM_IDX_GPIOCR_ALTC_MAX, +}; + +/** + * struct prcm_gpio_altcx - Other alternate-C function + * @used: other alternate-C function availability + * @reg_index: PRCM GPIOCR register index used to control the function + * @control_bit: PRCM GPIOCR bit used to control the function + */ +struct prcm_gpiocr_altcx { + bool used:1; + u8 reg_index:2; + u8 control_bit:5; +} __packed; + +/** + * struct prcm_gpio_altcx_pin_desc - Other alternate-C pin + * @pin: The pin number + * @altcx: array of other alternate-C[1-4] functions + */ +struct prcm_gpiocr_altcx_pin_desc { + unsigned short pin; + struct prcm_gpiocr_altcx altcx[PRCM_IDX_GPIOCR_ALTC_MAX]; +}; + +/** + * struct nmk_function - Nomadik pinctrl mux function + * @name: The name of the function, exported to pinctrl core. + * @groups: An array of pin groups that may select this function. + * @ngroups: The number of entries in @groups. + */ +struct nmk_function { + const char *name; + const char * const *groups; + unsigned ngroups; +}; + +/** + * struct nmk_pingroup - describes a Nomadik pin group + * @grp: Generic data of the pin group (name and pins) + * @altsetting: the altsetting to apply to all pins in this group to + * configure them to be used by a function + */ +struct nmk_pingroup { + struct pingroup grp; + int altsetting; +}; + +#define NMK_PIN_GROUP(a, b) \ + { \ + .grp = PINCTRL_PINGROUP(#a, a##_pins, ARRAY_SIZE(a##_pins)), \ + .altsetting = b, \ + } + +/** + * struct nmk_pinctrl_soc_data - Nomadik pin controller per-SoC configuration + * @pins: An array describing all pins the pin controller affects. + * All pins which are also GPIOs must be listed first within the + * array, and be numbered identically to the GPIO controller's + * numbering. + * @npins: The number of entries in @pins. + * @functions: The functions supported on this SoC. + * @nfunction: The number of entries in @functions. + * @groups: An array describing all pin groups the pin SoC supports. + * @ngroups: The number of entries in @groups. + * @altcx_pins: The pins that support Other alternate-C function on this SoC + * @npins_altcx: The number of Other alternate-C pins + * @prcm_gpiocr_registers: The array of PRCM GPIOCR registers on this SoC + */ +struct nmk_pinctrl_soc_data { + const struct pinctrl_pin_desc *pins; + unsigned npins; + const struct nmk_function *functions; + unsigned nfunctions; + const struct nmk_pingroup *groups; + unsigned ngroups; + const struct prcm_gpiocr_altcx_pin_desc *altcx_pins; + unsigned npins_altcx; + const u16 *prcm_gpiocr_registers; +}; + +#ifdef CONFIG_PINCTRL_STN8815 + +void nmk_pinctrl_stn8815_init(const struct nmk_pinctrl_soc_data **soc); + +#else + +static inline void +nmk_pinctrl_stn8815_init(const struct nmk_pinctrl_soc_data **soc) +{ +} + +#endif + +#ifdef CONFIG_PINCTRL_DB8500 + +void nmk_pinctrl_db8500_init(const struct nmk_pinctrl_soc_data **soc); + +#else + +static inline void +nmk_pinctrl_db8500_init(const struct nmk_pinctrl_soc_data **soc) +{ +} + +#endif + +#endif /* PINCTRL_PINCTRL_NOMADIK_H */ |