drivers/mfd/pcf50633-gpio.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /* NXP PCF50633 GPIO Driver
   3  *
   4  * (C) 2006-2008 by Openmoko, Inc.
   5  * Author: Balaji Rao <balajirrao@openmoko.org>
   6  * All rights reserved.
   7  *
   8  * Broken down from monstrous PCF50633 driver mainly by
   9  * Harald Welte, Andy Green and Werner Almesberger
  10  */
  11
  12 #include <linux/kernel.h>
  13 #include <linux/module.h>
  14
  15 #include <linux/mfd/pcf50633/core.h>
  16 #include <linux/mfd/pcf50633/gpio.h>
  17 #include <linux/mfd/pcf50633/pmic.h>
  18
  19 static const u8 pcf50633_regulator_registers[PCF50633_NUM_REGULATORS] = {
  20         [PCF50633_REGULATOR_AUTO]       = PCF50633_REG_AUTOOUT,
  21         [PCF50633_REGULATOR_DOWN1]      = PCF50633_REG_DOWN1OUT,
  22         [PCF50633_REGULATOR_DOWN2]      = PCF50633_REG_DOWN2OUT,
  23         [PCF50633_REGULATOR_MEMLDO]     = PCF50633_REG_MEMLDOOUT,
  24         [PCF50633_REGULATOR_LDO1]       = PCF50633_REG_LDO1OUT,
  25         [PCF50633_REGULATOR_LDO2]       = PCF50633_REG_LDO2OUT,
  26         [PCF50633_REGULATOR_LDO3]       = PCF50633_REG_LDO3OUT,
  27         [PCF50633_REGULATOR_LDO4]       = PCF50633_REG_LDO4OUT,
  28         [PCF50633_REGULATOR_LDO5]       = PCF50633_REG_LDO5OUT,
  29         [PCF50633_REGULATOR_LDO6]       = PCF50633_REG_LDO6OUT,
  30         [PCF50633_REGULATOR_HCLDO]      = PCF50633_REG_HCLDOOUT,
  31 };
  32
  33 int pcf50633_gpio_set(struct pcf50633 *pcf, int gpio, u8 val)
  34 {
  35         u8 reg;
  36
  37         reg = gpio - PCF50633_GPIO1 + PCF50633_REG_GPIO1CFG;
  38
  39         return pcf50633_reg_set_bit_mask(pcf, reg, 0x07, val);
  40 }
  41 EXPORT_SYMBOL_GPL(pcf50633_gpio_set);
  42
  43 u8 pcf50633_gpio_get(struct pcf50633 *pcf, int gpio)
  44 {
  45         u8 reg, val;
  46
  47         reg = gpio - PCF50633_GPIO1 + PCF50633_REG_GPIO1CFG;
  48         val = pcf50633_reg_read(pcf, reg) & 0x07;
  49
  50         return val;
  51 }
  52 EXPORT_SYMBOL_GPL(pcf50633_gpio_get);
  53
  54 int pcf50633_gpio_invert_set(struct pcf50633 *pcf, int gpio, int invert)
  55 {
  56         u8 val, reg;
  57
  58         reg = gpio - PCF50633_GPIO1 + PCF50633_REG_GPIO1CFG;
  59         val = !!invert << 3;
  60
  61         return pcf50633_reg_set_bit_mask(pcf, reg, 1 << 3, val);
  62 }
  63 EXPORT_SYMBOL_GPL(pcf50633_gpio_invert_set);
  64
  65 int pcf50633_gpio_invert_get(struct pcf50633 *pcf, int gpio)
  66 {
  67         u8 reg, val;
  68
  69         reg = gpio - PCF50633_GPIO1 + PCF50633_REG_GPIO1CFG;
  70         val = pcf50633_reg_read(pcf, reg);
  71
  72         return val & (1 << 3);
  73 }
  74 EXPORT_SYMBOL_GPL(pcf50633_gpio_invert_get);
  75
  76 int pcf50633_gpio_power_supply_set(struct pcf50633 *pcf,
  77                                         int gpio, int regulator, int on)
  78 {
  79         u8 reg, val, mask;
  80
  81         /* the *ENA register is always one after the *OUT register */
  82         reg = pcf50633_regulator_registers[regulator] + 1;
  83
  84         val = !!on << (gpio - PCF50633_GPIO1);
  85         mask = 1 << (gpio - PCF50633_GPIO1);
  86
  87         return pcf50633_reg_set_bit_mask(pcf, reg, mask, val);
  88 }
  89 EXPORT_SYMBOL_GPL(pcf50633_gpio_power_supply_set);
  90
  91 MODULE_LICENSE("GPL");