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 #include <linux/mfd/pcf50633/pmic.h>
  23
  24 static 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
  38 int 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 }
  46 EXPORT_SYMBOL_GPL(pcf50633_gpio_set);
  47
  48 u8 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 }
  57 EXPORT_SYMBOL_GPL(pcf50633_gpio_get);
  58
  59 int 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 }
  68 EXPORT_SYMBOL_GPL(pcf50633_gpio_invert_set);
  69
  70 int 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 }
  79 EXPORT_SYMBOL_GPL(pcf50633_gpio_invert_get);
  80
  81 int 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 }
  94 EXPORT_SYMBOL_GPL(pcf50633_gpio_power_supply_set);
  95
  96 MODULE_LICENSE("GPL");