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
  22 enum 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
  48 static 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
  62 int 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 }
  70 EXPORT_SYMBOL_GPL(pcf50633_gpio_set);
  71
  72 u8 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 }
  81 EXPORT_SYMBOL_GPL(pcf50633_gpio_get);
  82
  83 int 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 }
  92 EXPORT_SYMBOL_GPL(pcf50633_gpio_invert_set);
  93
  94 int 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 }
 103 EXPORT_SYMBOL_GPL(pcf50633_gpio_invert_get);
 104
 105 int 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 }
 118 EXPORT_SYMBOL_GPL(pcf50633_gpio_power_supply_set);