drivers/mfd/pcf50633-gpio.c

0001 // SPDX-License-Identifier: GPL-2.0-or-later
0002 /* NXP PCF50633 GPIO Driver
0003  *
0004  * (C) 2006-2008 by Openmoko, Inc.
0005  * Author: Balaji Rao <balajirrao@openmoko.org>
0006  * All rights reserved.
0007  *
0008  * Broken down from monstrous PCF50633 driver mainly by
0009  * Harald Welte, Andy Green and Werner Almesberger
0010  */
0011
0012 #include <linux/kernel.h>
0013 #include <linux/module.h>
0014
0015 #include <linux/mfd/pcf50633/core.h>
0016 #include <linux/mfd/pcf50633/gpio.h>
0017 #include <linux/mfd/pcf50633/pmic.h>
0018
0019 static const u8 pcf50633_regulator_registers[PCF50633_NUM_REGULATORS] = {
0020     [PCF50633_REGULATOR_AUTO]   = PCF50633_REG_AUTOOUT,
0021     [PCF50633_REGULATOR_DOWN1]  = PCF50633_REG_DOWN1OUT,
0022     [PCF50633_REGULATOR_DOWN2]  = PCF50633_REG_DOWN2OUT,
0023     [PCF50633_REGULATOR_MEMLDO] = PCF50633_REG_MEMLDOOUT,
0024     [PCF50633_REGULATOR_LDO1]   = PCF50633_REG_LDO1OUT,
0025     [PCF50633_REGULATOR_LDO2]   = PCF50633_REG_LDO2OUT,
0026     [PCF50633_REGULATOR_LDO3]   = PCF50633_REG_LDO3OUT,
0027     [PCF50633_REGULATOR_LDO4]   = PCF50633_REG_LDO4OUT,
0028     [PCF50633_REGULATOR_LDO5]   = PCF50633_REG_LDO5OUT,
0029     [PCF50633_REGULATOR_LDO6]   = PCF50633_REG_LDO6OUT,
0030     [PCF50633_REGULATOR_HCLDO]  = PCF50633_REG_HCLDOOUT,
0031 };
0032
0033 int pcf50633_gpio_set(struct pcf50633 *pcf, int gpio, u8 val)
0034 {
0035     u8 reg;
0036
0037     reg = gpio - PCF50633_GPIO1 + PCF50633_REG_GPIO1CFG;
0038
0039     return pcf50633_reg_set_bit_mask(pcf, reg, 0x07, val);
0040 }
0041 EXPORT_SYMBOL_GPL(pcf50633_gpio_set);
0042
0043 u8 pcf50633_gpio_get(struct pcf50633 *pcf, int gpio)
0044 {
0045     u8 reg, val;
0046
0047     reg = gpio - PCF50633_GPIO1 + PCF50633_REG_GPIO1CFG;
0048     val = pcf50633_reg_read(pcf, reg) & 0x07;
0049
0050     return val;
0051 }
0052 EXPORT_SYMBOL_GPL(pcf50633_gpio_get);
0053
0054 int pcf50633_gpio_invert_set(struct pcf50633 *pcf, int gpio, int invert)
0055 {
0056     u8 val, reg;
0057
0058     reg = gpio - PCF50633_GPIO1 + PCF50633_REG_GPIO1CFG;
0059     val = !!invert << 3;
0060
0061     return pcf50633_reg_set_bit_mask(pcf, reg, 1 << 3, val);
0062 }
0063 EXPORT_SYMBOL_GPL(pcf50633_gpio_invert_set);
0064
0065 int pcf50633_gpio_invert_get(struct pcf50633 *pcf, int gpio)
0066 {
0067     u8 reg, val;
0068
0069     reg = gpio - PCF50633_GPIO1 + PCF50633_REG_GPIO1CFG;
0070     val = pcf50633_reg_read(pcf, reg);
0071
0072     return val & (1 << 3);
0073 }
0074 EXPORT_SYMBOL_GPL(pcf50633_gpio_invert_get);
0075
0076 int pcf50633_gpio_power_supply_set(struct pcf50633 *pcf,
0077                     int gpio, int regulator, int on)
0078 {
0079     u8 reg, val, mask;
0080
0081     /* the *ENA register is always one after the *OUT register */
0082     reg = pcf50633_regulator_registers[regulator] + 1;
0083
0084     val = !!on << (gpio - PCF50633_GPIO1);
0085     mask = 1 << (gpio - PCF50633_GPIO1);
0086
0087     return pcf50633_reg_set_bit_mask(pcf, reg, mask, val);
0088 }
0089 EXPORT_SYMBOL_GPL(pcf50633_gpio_power_supply_set);
0090
0091 MODULE_LICENSE("GPL");