drivers/mfd/pcf50633-gpio.c

   1 /* NXP PCF50633 GPIO Driver
   2  *
   3  * (C) 2006-2008 by Openmoko, Inc.
   4  * Author: Balaji Rao <balajirrao@openmoko.org>
   5  * All rights reserved.
   6  *
   7  * Broken down from monstrous PCF50633 driver mainly by
   8  * Harald Welte, Andy Green and Werner Almesberger
   9  *
  10  *  This program is free software; you can redistribute  it and/or modify it
  11  *  under  the terms of  the GNU General  Public License as published by the
  12  *  Free Software Foundation;  either version 2 of the  License, or (at your
  13  *  option) any later version.
  14  *
  15  */
  16
  17 #include <linux/kernel.h>
  18 #include <linux/module.h>
  19
  20 #include <linux/mfd/pcf50633/core.h>
  21 #include <linux/mfd/pcf50633/gpio.h>
  22
  23 enum pcf50633_regulator_id {
  24         PCF50633_REGULATOR_AUTO,
  25         PCF50633_REGULATOR_DOWN1,
  26         PCF50633_REGULATOR_DOWN2,
  27         PCF50633_REGULATOR_LDO1,
  28         PCF50633_REGULATOR_LDO2,
  29         PCF50633_REGULATOR_LDO3,
  30         PCF50633_REGULATOR_LDO4,
  31         PCF50633_REGULATOR_LDO5,
  32         PCF50633_REGULATOR_LDO6,
  33         PCF50633_REGULATOR_HCLDO,
  34         PCF50633_REGULATOR_MEMLDO,
  35 };
  36
  37 #define PCF50633_REG_AUTOOUT    0x1a
  38 #define PCF50633_REG_DOWN1OUT   0x1e
  39 #define PCF50633_REG_DOWN2OUT   0x22
  40 #define PCF50633_REG_MEMLDOOUT  0x26
  41 #define PCF50633_REG_LDO1OUT    0x2d
  42 #define PCF50633_REG_LDO2OUT    0x2f
  43 #define PCF50633_REG_LDO3OUT    0x31
  44 #define PCF50633_REG_LDO4OUT    0x33
  45 #define PCF50633_REG_LDO5OUT    0x35
  46 #define PCF50633_REG_LDO6OUT    0x37
  47 #define PCF50633_REG_HCLDOOUT   0x39
  48
  49 static const u8 pcf50633_regulator_registers[PCF50633_NUM_REGULATORS] = {
  50         [PCF50633_REGULATOR_AUTO]       = PCF50633_REG_AUTOOUT,
  51         [PCF50633_REGULATOR_DOWN1]      = PCF50633_REG_DOWN1OUT,
  52         [PCF50633_REGULATOR_DOWN2]      = PCF50633_REG_DOWN2OUT,
  53         [PCF50633_REGULATOR_MEMLDO]     = PCF50633_REG_MEMLDOOUT,
  54         [PCF50633_REGULATOR_LDO1]       = PCF50633_REG_LDO1OUT,
  55         [PCF50633_REGULATOR_LDO2]       = PCF50633_REG_LDO2OUT,
  56         [PCF50633_REGULATOR_LDO3]       = PCF50633_REG_LDO3OUT,
  57         [PCF50633_REGULATOR_LDO4]       = PCF50633_REG_LDO4OUT,
  58         [PCF50633_REGULATOR_LDO5]       = PCF50633_REG_LDO5OUT,
  59         [PCF50633_REGULATOR_LDO6]       = PCF50633_REG_LDO6OUT,
  60         [PCF50633_REGULATOR_HCLDO]      = PCF50633_REG_HCLDOOUT,
  61 };
  62
  63 int pcf50633_gpio_set(struct pcf50633 *pcf, int gpio, u8 val)
  64 {
  65         u8 reg;
  66
  67         reg = gpio - PCF50633_GPIO1 + PCF50633_REG_GPIO1CFG;
  68
  69         return pcf50633_reg_set_bit_mask(pcf, reg, 0x07, val);
  70 }
  71 EXPORT_SYMBOL_GPL(pcf50633_gpio_set);
  72
  73 u8 pcf50633_gpio_get(struct pcf50633 *pcf, int gpio)
  74 {
  75         u8 reg, val;
  76
  77         reg = gpio - PCF50633_GPIO1 + PCF50633_REG_GPIO1CFG;
  78         val = pcf50633_reg_read(pcf, reg) & 0x07;
  79
  80         return val;
  81 }
  82 EXPORT_SYMBOL_GPL(pcf50633_gpio_get);
  83
  84 int pcf50633_gpio_invert_set(struct pcf50633 *pcf, int gpio, int invert)
  85 {
  86         u8 val, reg;
  87
  88         reg = gpio - PCF50633_GPIO1 + PCF50633_REG_GPIO1CFG;
  89         val = !!invert << 3;
  90
  91         return pcf50633_reg_set_bit_mask(pcf, reg, 1 << 3, val);
  92 }
  93 EXPORT_SYMBOL_GPL(pcf50633_gpio_invert_set);
  94
  95 int pcf50633_gpio_invert_get(struct pcf50633 *pcf, int gpio)
  96 {
  97         u8 reg, val;
  98
  99         reg = gpio - PCF50633_GPIO1 + PCF50633_REG_GPIO1CFG;
 100         val = pcf50633_reg_read(pcf, reg);
 101
 102         return val & (1 << 3);
 103 }
 104 EXPORT_SYMBOL_GPL(pcf50633_gpio_invert_get);
 105
 106 int pcf50633_gpio_power_supply_set(struct pcf50633 *pcf,
 107                                         int gpio, int regulator, int on)
 108 {
 109         u8 reg, val, mask;
 110
 111         /* the *ENA register is always one after the *OUT register */
 112         reg = pcf50633_regulator_registers[regulator] + 1;
 113
 114         val = !!on << (gpio - PCF50633_GPIO1);
 115         mask = 1 << (gpio - PCF50633_GPIO1);
 116
 117         return pcf50633_reg_set_bit_mask(pcf, reg, mask, val);
 118 }
 119 EXPORT_SYMBOL_GPL(pcf50633_gpio_power_supply_set);
 120
 121 MODULE_LICENSE("GPL");