drivers/pinctrl/nomadik/pinctrl-nomadik.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef PINCTRL_PINCTRL_NOMADIK_H
   3 #define PINCTRL_PINCTRL_NOMADIK_H
   4
   5 /* Package definitions */
   6 #define PINCTRL_NMK_STN8815     0
   7 #define PINCTRL_NMK_DB8500      1
   8 #define PINCTRL_NMK_DB8540      2
   9
  10 /* Alternate functions: function C is set in hw by setting both A and B */
  11 #define NMK_GPIO_ALT_GPIO       0
  12 #define NMK_GPIO_ALT_A  1
  13 #define NMK_GPIO_ALT_B  2
  14 #define NMK_GPIO_ALT_C  (NMK_GPIO_ALT_A | NMK_GPIO_ALT_B)
  15
  16 #define NMK_GPIO_ALT_CX_SHIFT 2
  17 #define NMK_GPIO_ALT_C1 ((1<<NMK_GPIO_ALT_CX_SHIFT) | NMK_GPIO_ALT_C)
  18 #define NMK_GPIO_ALT_C2 ((2<<NMK_GPIO_ALT_CX_SHIFT) | NMK_GPIO_ALT_C)
  19 #define NMK_GPIO_ALT_C3 ((3<<NMK_GPIO_ALT_CX_SHIFT) | NMK_GPIO_ALT_C)
  20 #define NMK_GPIO_ALT_C4 ((4<<NMK_GPIO_ALT_CX_SHIFT) | NMK_GPIO_ALT_C)
  21
  22 #define PRCM_GPIOCR_ALTCX(pin_num,\
  23         altc1_used, altc1_ri, altc1_cb,\
  24         altc2_used, altc2_ri, altc2_cb,\
  25         altc3_used, altc3_ri, altc3_cb,\
  26         altc4_used, altc4_ri, altc4_cb)\
  27 {\
  28         .pin = pin_num,\
  29         .altcx[PRCM_IDX_GPIOCR_ALTC1] = {\
  30                 .used = altc1_used,\
  31                 .reg_index = altc1_ri,\
  32                 .control_bit = altc1_cb\
  33         },\
  34         .altcx[PRCM_IDX_GPIOCR_ALTC2] = {\
  35                 .used = altc2_used,\
  36                 .reg_index = altc2_ri,\
  37                 .control_bit = altc2_cb\
  38         },\
  39         .altcx[PRCM_IDX_GPIOCR_ALTC3] = {\
  40                 .used = altc3_used,\
  41                 .reg_index = altc3_ri,\
  42                 .control_bit = altc3_cb\
  43         },\
  44         .altcx[PRCM_IDX_GPIOCR_ALTC4] = {\
  45                 .used = altc4_used,\
  46                 .reg_index = altc4_ri,\
  47                 .control_bit = altc4_cb\
  48         },\
  49 }
  50
  51 /**
  52  * enum prcm_gpiocr_reg_index
  53  * Used to reference an PRCM GPIOCR register address.
  54  */
  55 enum prcm_gpiocr_reg_index {
  56         PRCM_IDX_GPIOCR1,
  57         PRCM_IDX_GPIOCR2,
  58         PRCM_IDX_GPIOCR3
  59 };
  60 /**
  61  * enum prcm_gpiocr_altcx_index
  62  * Used to reference an Other alternate-C function.
  63  */
  64 enum prcm_gpiocr_altcx_index {
  65         PRCM_IDX_GPIOCR_ALTC1,
  66         PRCM_IDX_GPIOCR_ALTC2,
  67         PRCM_IDX_GPIOCR_ALTC3,
  68         PRCM_IDX_GPIOCR_ALTC4,
  69         PRCM_IDX_GPIOCR_ALTC_MAX,
  70 };
  71
  72 /**
  73  * struct prcm_gpio_altcx - Other alternate-C function
  74  * @used: other alternate-C function availability
  75  * @reg_index: PRCM GPIOCR register index used to control the function
  76  * @control_bit: PRCM GPIOCR bit used to control the function
  77  */
  78 struct prcm_gpiocr_altcx {
  79         bool used:1;
  80         u8 reg_index:2;
  81         u8 control_bit:5;
  82 } __packed;
  83
  84 /**
  85  * struct prcm_gpio_altcx_pin_desc - Other alternate-C pin
  86  * @pin: The pin number
  87  * @altcx: array of other alternate-C[1-4] functions
  88  */
  89 struct prcm_gpiocr_altcx_pin_desc {
  90         unsigned short pin;
  91         struct prcm_gpiocr_altcx altcx[PRCM_IDX_GPIOCR_ALTC_MAX];
  92 };
  93
  94 /**
  95  * struct nmk_function - Nomadik pinctrl mux function
  96  * @name: The name of the function, exported to pinctrl core.
  97  * @groups: An array of pin groups that may select this function.
  98  * @ngroups: The number of entries in @groups.
  99  */
 100 struct nmk_function {
 101         const char *name;
 102         const char * const *groups;
 103         unsigned ngroups;
 104 };
 105
 106 /**
 107  * struct nmk_pingroup - describes a Nomadik pin group
 108  * @name: the name of this specific pin group
 109  * @pins: an array of discrete physical pins used in this group, taken
 110  *      from the driver-local pin enumeration space
 111  * @num_pins: the number of pins in this group array, i.e. the number of
 112  *      elements in .pins so we can iterate over that array
 113  * @altsetting: the altsetting to apply to all pins in this group to
 114  *      configure them to be used by a function
 115  */
 116 struct nmk_pingroup {
 117         const char *name;
 118         const unsigned int *pins;
 119         const unsigned npins;
 120         int altsetting;
 121 };
 122
 123 /**
 124  * struct nmk_pinctrl_soc_data - Nomadik pin controller per-SoC configuration
 125  * @pins:       An array describing all pins the pin controller affects.
 126  *              All pins which are also GPIOs must be listed first within the
 127  *              array, and be numbered identically to the GPIO controller's
 128  *              numbering.
 129  * @npins:      The number of entries in @pins.
 130  * @functions:  The functions supported on this SoC.
 131  * @nfunction:  The number of entries in @functions.
 132  * @groups:     An array describing all pin groups the pin SoC supports.
 133  * @ngroups:    The number of entries in @groups.
 134  * @altcx_pins: The pins that support Other alternate-C function on this SoC
 135  * @npins_altcx: The number of Other alternate-C pins
 136  * @prcm_gpiocr_registers: The array of PRCM GPIOCR registers on this SoC
 137  */
 138 struct nmk_pinctrl_soc_data {
 139         const struct pinctrl_pin_desc *pins;
 140         unsigned npins;
 141         const struct nmk_function *functions;
 142         unsigned nfunctions;
 143         const struct nmk_pingroup *groups;
 144         unsigned ngroups;
 145         const struct prcm_gpiocr_altcx_pin_desc *altcx_pins;
 146         unsigned npins_altcx;
 147         const u16 *prcm_gpiocr_registers;
 148 };
 149
 150 #ifdef CONFIG_PINCTRL_STN8815
 151
 152 void nmk_pinctrl_stn8815_init(const struct nmk_pinctrl_soc_data **soc);
 153
 154 #else
 155
 156 static inline void
 157 nmk_pinctrl_stn8815_init(const struct nmk_pinctrl_soc_data **soc)
 158 {
 159 }
 160
 161 #endif
 162
 163 #ifdef CONFIG_PINCTRL_DB8500
 164
 165 void nmk_pinctrl_db8500_init(const struct nmk_pinctrl_soc_data **soc);
 166
 167 #else
 168
 169 static inline void
 170 nmk_pinctrl_db8500_init(const struct nmk_pinctrl_soc_data **soc)
 171 {
 172 }
 173
 174 #endif
 175
 176 #ifdef CONFIG_PINCTRL_DB8540
 177
 178 void nmk_pinctrl_db8540_init(const struct nmk_pinctrl_soc_data **soc);
 179
 180 #else
 181
 182 static inline void
 183 nmk_pinctrl_db8540_init(const struct nmk_pinctrl_soc_data **soc)
 184 {
 185 }
 186
 187 #endif
 188
 189 #endif /* PINCTRL_PINCTRL_NOMADIK_H */