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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/drivers/mfd/pcf50633-gpio.c
15111 views
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/* NXP PCF50633 GPIO Driver

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 *

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 * (C) 2006-2008 by Openmoko, Inc.

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 * Author: Balaji Rao <[email protected]>

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 * All rights reserved.

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 *

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 * Broken down from monstrous PCF50633 driver mainly by

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 * Harald Welte, Andy Green and Werner Almesberger

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 *

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 *  This program is free software; you can redistribute  it and/or modify it

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 *  under  the terms of  the GNU General  Public License as published by the

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 *  Free Software Foundation;  either version 2 of the  License, or (at your

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 *  option) any later version.

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 *

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 */

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#include <linux/kernel.h>

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#include <linux/module.h>

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#include <linux/mfd/pcf50633/core.h>

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#include <linux/mfd/pcf50633/gpio.h>

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enum pcf50633_regulator_id {

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	PCF50633_REGULATOR_AUTO,

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	PCF50633_REGULATOR_DOWN1,

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	PCF50633_REGULATOR_DOWN2,

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	PCF50633_REGULATOR_LDO1,

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	PCF50633_REGULATOR_LDO2,

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	PCF50633_REGULATOR_LDO3,

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	PCF50633_REGULATOR_LDO4,

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	PCF50633_REGULATOR_LDO5,

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	PCF50633_REGULATOR_LDO6,

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	PCF50633_REGULATOR_HCLDO,

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	PCF50633_REGULATOR_MEMLDO,

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};

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#define PCF50633_REG_AUTOOUT	0x1a

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#define PCF50633_REG_DOWN1OUT	0x1e

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#define PCF50633_REG_DOWN2OUT	0x22

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#define PCF50633_REG_MEMLDOOUT	0x26

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#define PCF50633_REG_LDO1OUT	0x2d

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#define PCF50633_REG_LDO2OUT	0x2f

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#define PCF50633_REG_LDO3OUT	0x31

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#define PCF50633_REG_LDO4OUT	0x33

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#define PCF50633_REG_LDO5OUT	0x35

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#define PCF50633_REG_LDO6OUT	0x37

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#define PCF50633_REG_HCLDOOUT	0x39

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static const u8 pcf50633_regulator_registers[PCF50633_NUM_REGULATORS] = {

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	[PCF50633_REGULATOR_AUTO]	= PCF50633_REG_AUTOOUT,

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	[PCF50633_REGULATOR_DOWN1]	= PCF50633_REG_DOWN1OUT,

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	[PCF50633_REGULATOR_DOWN2]	= PCF50633_REG_DOWN2OUT,

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	[PCF50633_REGULATOR_MEMLDO]	= PCF50633_REG_MEMLDOOUT,

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	[PCF50633_REGULATOR_LDO1]	= PCF50633_REG_LDO1OUT,

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	[PCF50633_REGULATOR_LDO2]	= PCF50633_REG_LDO2OUT,

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	[PCF50633_REGULATOR_LDO3]	= PCF50633_REG_LDO3OUT,

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	[PCF50633_REGULATOR_LDO4]	= PCF50633_REG_LDO4OUT,

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	[PCF50633_REGULATOR_LDO5]	= PCF50633_REG_LDO5OUT,

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	[PCF50633_REGULATOR_LDO6]	= PCF50633_REG_LDO6OUT,

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	[PCF50633_REGULATOR_HCLDO]	= PCF50633_REG_HCLDOOUT,

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};

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int pcf50633_gpio_set(struct pcf50633 *pcf, int gpio, u8 val)

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{

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	u8 reg;

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	reg = gpio - PCF50633_GPIO1 + PCF50633_REG_GPIO1CFG;

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	return pcf50633_reg_set_bit_mask(pcf, reg, 0x07, val);

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}

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EXPORT_SYMBOL_GPL(pcf50633_gpio_set);

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u8 pcf50633_gpio_get(struct pcf50633 *pcf, int gpio)

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{

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	u8 reg, val;

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	reg = gpio - PCF50633_GPIO1 + PCF50633_REG_GPIO1CFG;

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	val = pcf50633_reg_read(pcf, reg) & 0x07;

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	return val;

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}

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EXPORT_SYMBOL_GPL(pcf50633_gpio_get);

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int pcf50633_gpio_invert_set(struct pcf50633 *pcf, int gpio, int invert)

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{

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	u8 val, reg;

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	reg = gpio - PCF50633_GPIO1 + PCF50633_REG_GPIO1CFG;

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	val = !!invert << 3;

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	return pcf50633_reg_set_bit_mask(pcf, reg, 1 << 3, val);

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}

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EXPORT_SYMBOL_GPL(pcf50633_gpio_invert_set);

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int pcf50633_gpio_invert_get(struct pcf50633 *pcf, int gpio)

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{

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	u8 reg, val;

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	reg = gpio - PCF50633_GPIO1 + PCF50633_REG_GPIO1CFG;

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	val = pcf50633_reg_read(pcf, reg);

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	return val & (1 << 3);

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}

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EXPORT_SYMBOL_GPL(pcf50633_gpio_invert_get);

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int pcf50633_gpio_power_supply_set(struct pcf50633 *pcf,

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					int gpio, int regulator, int on)

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{

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	u8 reg, val, mask;

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	/* the *ENA register is always one after the *OUT register */

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	reg = pcf50633_regulator_registers[regulator] + 1;

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	val = !!on << (gpio - PCF50633_GPIO1);

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	mask = 1 << (gpio - PCF50633_GPIO1);

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	return pcf50633_reg_set_bit_mask(pcf, reg, mask, val);

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}

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EXPORT_SYMBOL_GPL(pcf50633_gpio_power_supply_set);

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MODULE_LICENSE("GPL");

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