drivers/pinctrl/pinctrl-msm.h

   1 /*
   2  * Copyright (c) 2013, Sony Mobile Communications AB.
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 and
   6  * only version 2 as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  */
  13 #ifndef __PINCTRL_MSM_H__
  14 #define __PINCTRL_MSM_H__
  15
  16 #include <linux/pinctrl/pinctrl.h>
  17 #include <linux/pinctrl/pinmux.h>
  18 #include <linux/pinctrl/pinconf.h>
  19 #include <linux/pinctrl/machine.h>
  20
  21 /**
  22  * struct msm_function - a pinmux function
  23  * @name:    Name of the pinmux function.
  24  * @groups:  List of pingroups for this function.
  25  * @ngroups: Number of entries in @groups.
  26  */
  27 struct msm_function {
  28         const char *name;
  29         const char * const *groups;
  30         unsigned ngroups;
  31 };
  32
  33 /**
  34  * struct msm_pingroup - Qualcomm pingroup definition
  35  * @name:                 Name of the pingroup.
  36  * @pins:                 A list of pins assigned to this pingroup.
  37  * @npins:                Number of entries in @pins.
  38  * @funcs:                A list of pinmux functions that can be selected for
  39  *                        this group. The index of the selected function is used
  40  *                        for programming the function selector.
  41  *                        Entries should be indices into the groups list of the
  42  *                        struct msm_pinctrl_soc_data.
  43  * @ctl_reg:              Offset of the register holding control bits for this group.
  44  * @io_reg:               Offset of the register holding input/output bits for this group.
  45  * @intr_cfg_reg:         Offset of the register holding interrupt configuration bits.
  46  * @intr_status_reg:      Offset of the register holding the status bits for this group.
  47  * @intr_target_reg:      Offset of the register specifying routing of the interrupts
  48  *                        from this group.
  49  * @mux_bit:              Offset in @ctl_reg for the pinmux function selection.
  50  * @pull_bit:             Offset in @ctl_reg for the bias configuration.
  51  * @drv_bit:              Offset in @ctl_reg for the drive strength configuration.
  52  * @oe_bit:               Offset in @ctl_reg for controlling output enable.
  53  * @in_bit:               Offset in @io_reg for the input bit value.
  54  * @out_bit:              Offset in @io_reg for the output bit value.
  55  * @intr_enable_bit:      Offset in @intr_cfg_reg for enabling the interrupt for this group.
  56  * @intr_status_bit:      Offset in @intr_status_reg for reading and acking the interrupt
  57  *                        status.
  58  * @intr_target_bit:      Offset in @intr_target_reg for configuring the interrupt routing.
  59  * @intr_raw_status_bit:  Offset in @intr_cfg_reg for the raw status bit.
  60  * @intr_polarity_bit:    Offset in @intr_cfg_reg for specifying polarity of the interrupt.
  61  * @intr_detection_bit:   Offset in @intr_cfg_reg for specifying interrupt type.
  62  * @intr_detection_width: Number of bits used for specifying interrupt type,
  63  *                        Should be 2 for SoCs that can detect both edges in hardware,
  64  *                        otherwise 1.
  65  */
  66 struct msm_pingroup {
  67         const char *name;
  68         const unsigned *pins;
  69         unsigned npins;
  70
  71         unsigned funcs[8];
  72
  73         s16 ctl_reg;
  74         s16 io_reg;
  75         s16 intr_cfg_reg;
  76         s16 intr_status_reg;
  77         s16 intr_target_reg;
  78
  79         unsigned mux_bit:5;
  80
  81         unsigned pull_bit:5;
  82         unsigned drv_bit:5;
  83
  84         unsigned oe_bit:5;
  85         unsigned in_bit:5;
  86         unsigned out_bit:5;
  87
  88         unsigned intr_enable_bit:5;
  89         unsigned intr_status_bit:5;
  90
  91         unsigned intr_target_bit:5;
  92         unsigned intr_raw_status_bit:5;
  93         unsigned intr_polarity_bit:5;
  94         unsigned intr_detection_bit:5;
  95         unsigned intr_detection_width:5;
  96 };
  97
  98 /**
  99  * struct msm_pinctrl_soc_data - Qualcomm pin controller driver configuration
 100  * @pins:       An array describing all pins the pin controller affects.
 101  * @npins:      The number of entries in @pins.
 102  * @functions:  An array describing all mux functions the SoC supports.
 103  * @nfunctions: The number of entries in @functions.
 104  * @groups:     An array describing all pin groups the pin SoC supports.
 105  * @ngroups:    The numbmer of entries in @groups.
 106  * @ngpio:      The number of pingroups the driver should expose as GPIOs.
 107  */
 108 struct msm_pinctrl_soc_data {
 109         const struct pinctrl_pin_desc *pins;
 110         unsigned npins;
 111         const struct msm_function *functions;
 112         unsigned nfunctions;
 113         const struct msm_pingroup *groups;
 114         unsigned ngroups;
 115         unsigned ngpios;
 116 };
 117
 118 int msm_pinctrl_probe(struct platform_device *pdev,
 119                       const struct msm_pinctrl_soc_data *soc_data);
 120 int msm_pinctrl_remove(struct platform_device *pdev);
 121
 122 #endif