LXR linux/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
  19#include <linux/mfd/pcf50633/core.h>
  20#include <linux/mfd/pcf50633/gpio.h>
  21
  22enum pcf50633_regulator_id {
  23        PCF50633_REGULATOR_AUTO,
  24        PCF50633_REGULATOR_DOWN1,
  25        PCF50633_REGULATOR_DOWN2,
  26        PCF50633_REGULATOR_LDO1,
  27        PCF50633_REGULATOR_LDO2,
  28        PCF50633_REGULATOR_LDO3,
  29        PCF50633_REGULATOR_LDO4,
  30        PCF50633_REGULATOR_LDO5,
  31        PCF50633_REGULATOR_LDO6,
  32        PCF50633_REGULATOR_HCLDO,
  33        PCF50633_REGULATOR_MEMLDO,
  34};
  35
  36#define PCF50633_REG_AUTOOUT    0x1a
  37#define PCF50633_REG_DOWN1OUT   0x1e
  38#define PCF50633_REG_DOWN2OUT   0x22
  39#define PCF50633_REG_MEMLDOOUT  0x26
  40#define PCF50633_REG_LDO1OUT    0x2d
  41#define PCF50633_REG_LDO2OUT    0x2f
  42#define PCF50633_REG_LDO3OUT    0x31
  43#define PCF50633_REG_LDO4OUT    0x33
  44#define PCF50633_REG_LDO5OUT    0x35
  45#define PCF50633_REG_LDO6OUT    0x37
  46#define PCF50633_REG_HCLDOOUT   0x39
  47
  48static const u8 pcf50633_regulator_registers[PCF50633_NUM_REGULATORS] = {
  49        [PCF50633_REGULATOR_AUTO]       = PCF50633_REG_AUTOOUT,
  50        [PCF50633_REGULATOR_DOWN1]      = PCF50633_REG_DOWN1OUT,
  51        [PCF50633_REGULATOR_DOWN2]      = PCF50633_REG_DOWN2OUT,
  52        [PCF50633_REGULATOR_MEMLDO]     = PCF50633_REG_MEMLDOOUT,
  53        [PCF50633_REGULATOR_LDO1]       = PCF50633_REG_LDO1OUT,
  54        [PCF50633_REGULATOR_LDO2]       = PCF50633_REG_LDO2OUT,
  55        [PCF50633_REGULATOR_LDO3]       = PCF50633_REG_LDO3OUT,
  56        [PCF50633_REGULATOR_LDO4]       = PCF50633_REG_LDO4OUT,
  57        [PCF50633_REGULATOR_LDO5]       = PCF50633_REG_LDO5OUT,
  58        [PCF50633_REGULATOR_LDO6]       = PCF50633_REG_LDO6OUT,
  59        [PCF50633_REGULATOR_HCLDO]      = PCF50633_REG_HCLDOOUT,
  60};
  61
  62int pcf50633_gpio_set(struct pcf50633 *pcf, int gpio, u8 val)
  63{
  64        u8 reg;
  65
  66        reg = gpio - PCF50633_GPIO1 + PCF50633_REG_GPIO1CFG;
  67
  68        return pcf50633_reg_set_bit_mask(pcf, reg, 0x07, val);
  69}
  70EXPORT_SYMBOL_GPL(pcf50633_gpio_set);
  71
  72u8 pcf50633_gpio_get(struct pcf50633 *pcf, int gpio)
  73{
  74        u8 reg, val;
  75
  76        reg = gpio - PCF50633_GPIO1 + PCF50633_REG_GPIO1CFG;
  77        val = pcf50633_reg_read(pcf, reg) & 0x07;
  78
  79        return val;
  80}
  81EXPORT_SYMBOL_GPL(pcf50633_gpio_get);
  82
  83int pcf50633_gpio_invert_set(struct pcf50633 *pcf, int gpio, int invert)
  84{
  85        u8 val, reg;
  86
  87        reg = gpio - PCF50633_GPIO1 + PCF50633_REG_GPIO1CFG;
  88        val = !!invert << 3;
  89
  90        return pcf50633_reg_set_bit_mask(pcf, reg, 1 << 3, val);
  91}
  92EXPORT_SYMBOL_GPL(pcf50633_gpio_invert_set);
  93
  94int pcf50633_gpio_invert_get(struct pcf50633 *pcf, int gpio)
  95{
  96        u8 reg, val;
  97
  98        reg = gpio - PCF50633_GPIO1 + PCF50633_REG_GPIO1CFG;
  99        val = pcf50633_reg_read(pcf, reg);
 100
 101        return val & (1 << 3);
 102}
 103EXPORT_SYMBOL_GPL(pcf50633_gpio_invert_get);
 104
 105int pcf50633_gpio_power_supply_set(struct pcf50633 *pcf,
 106                                        int gpio, int regulator, int on)
 107{
 108        u8 reg, val, mask;
 109
 110        /* the *ENA register is always one after the *OUT register */
 111        reg = pcf50633_regulator_registers[regulator] + 1;
 112
 113        val = !!on << (gpio - PCF50633_GPIO1);
 114        mask = 1 << (gpio - PCF50633_GPIO1);
 115
 116        return pcf50633_reg_set_bit_mask(pcf, reg, mask, val);
 117}
 118EXPORT_SYMBOL_GPL(pcf50633_gpio_power_supply_set);
 119