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#include <linux/mfd/pcf50633/pmic.h>
  23
  24static const u8 pcf50633_regulator_registers[PCF50633_NUM_REGULATORS] = {
  25        [PCF50633_REGULATOR_AUTO]       = PCF50633_REG_AUTOOUT,
  26        [PCF50633_REGULATOR_DOWN1]      = PCF50633_REG_DOWN1OUT,
  27        [PCF50633_REGULATOR_DOWN2]      = PCF50633_REG_DOWN2OUT,
  28        [PCF50633_REGULATOR_MEMLDO]     = PCF50633_REG_MEMLDOOUT,
  29        [PCF50633_REGULATOR_LDO1]       = PCF50633_REG_LDO1OUT,
  30        [PCF50633_REGULATOR_LDO2]       = PCF50633_REG_LDO2OUT,
  31        [PCF50633_REGULATOR_LDO3]       = PCF50633_REG_LDO3OUT,
  32        [PCF50633_REGULATOR_LDO4]       = PCF50633_REG_LDO4OUT,
  33        [PCF50633_REGULATOR_LDO5]       = PCF50633_REG_LDO5OUT,
  34        [PCF50633_REGULATOR_LDO6]       = PCF50633_REG_LDO6OUT,
  35        [PCF50633_REGULATOR_HCLDO]      = PCF50633_REG_HCLDOOUT,
  36};
  37
  38int pcf50633_gpio_set(struct pcf50633 *pcf, int gpio, u8 val)
  39{
  40        u8 reg;
  41
  42        reg = gpio - PCF50633_GPIO1 + PCF50633_REG_GPIO1CFG;
  43
  44        return pcf50633_reg_set_bit_mask(pcf, reg, 0x07, val);
  45}
  46EXPORT_SYMBOL_GPL(pcf50633_gpio_set);
  47
  48u8 pcf50633_gpio_get(struct pcf50633 *pcf, int gpio)
  49{
  50        u8 reg, val;
  51
  52        reg = gpio - PCF50633_GPIO1 + PCF50633_REG_GPIO1CFG;
  53        val = pcf50633_reg_read(pcf, reg) & 0x07;
  54
  55        return val;
  56}
  57EXPORT_SYMBOL_GPL(pcf50633_gpio_get);
  58
  59int pcf50633_gpio_invert_set(struct pcf50633 *pcf, int gpio, int invert)
  60{
  61        u8 val, reg;
  62
  63        reg = gpio - PCF50633_GPIO1 + PCF50633_REG_GPIO1CFG;
  64        val = !!invert << 3;
  65
  66        return pcf50633_reg_set_bit_mask(pcf, reg, 1 << 3, val);
  67}
  68EXPORT_SYMBOL_GPL(pcf50633_gpio_invert_set);
  69
  70int pcf50633_gpio_invert_get(struct pcf50633 *pcf, int gpio)
  71{
  72        u8 reg, val;
  73
  74        reg = gpio - PCF50633_GPIO1 + PCF50633_REG_GPIO1CFG;
  75        val = pcf50633_reg_read(pcf, reg);
  76
  77        return val & (1 << 3);
  78}
  79EXPORT_SYMBOL_GPL(pcf50633_gpio_invert_get);
  80
  81int pcf50633_gpio_power_supply_set(struct pcf50633 *pcf,
  82                                        int gpio, int regulator, int on)
  83{
  84        u8 reg, val, mask;
  85
  86        /* the *ENA register is always one after the *OUT register */
  87        reg = pcf50633_regulator_registers[regulator] + 1;
  88
  89        val = !!on << (gpio - PCF50633_GPIO1);
  90        mask = 1 << (gpio - PCF50633_GPIO1);
  91
  92        return pcf50633_reg_set_bit_mask(pcf, reg, mask, val);
  93}
  94EXPORT_SYMBOL_GPL(pcf50633_gpio_power_supply_set);
  95
  96MODULE_LICENSE("GPL");
  97
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