linux/drivers/mfd/pcf50633-gpio.c
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   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
  23enum 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
  49static 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
  63int 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}
  71EXPORT_SYMBOL_GPL(pcf50633_gpio_set);
  72
  73u8 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}
  82EXPORT_SYMBOL_GPL(pcf50633_gpio_get);
  83
  84int 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}
  93EXPORT_SYMBOL_GPL(pcf50633_gpio_invert_set);
  94
  95int 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}
 104EXPORT_SYMBOL_GPL(pcf50633_gpio_invert_get);
 105
 106int 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}
 119EXPORT_SYMBOL_GPL(pcf50633_gpio_power_supply_set);
 120
 121MODULE_LICENSE("GPL");
 122