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Viewing changes to drivers/gpio/tps65910-gpio.c

  • Committer: Bazaar Package Importer
  • Author(s): Paolo Pisati
  • Date: 2011-06-29 15:23:51 UTC
  • mfrom: (26.1.1 natty-proposed)
  • Revision ID: james.westby@ubuntu.com-20110629152351-xs96tm303d95rpbk
Tags: 3.0.0-1200.2
* Rebased against 3.0.0-6.7
* BSP from TI based on 3.0.0

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drivers/gpio/tps65910-gpio.c
 
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/*
 
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 * tps65910-gpio.c  --  TI TPS6591x
 
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 *
 
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 * Copyright 2010 Texas Instruments Inc.
 
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 *
 
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 * Author: Graeme Gregory <gg@slimlogic.co.uk>
 
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 * Author: Jorge Eduardo Candelaria jedu@slimlogic.co.uk>
 
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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/errno.h>
 
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#include <linux/gpio.h>
 
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#include <linux/i2c.h>
 
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#include <linux/mfd/tps65910.h>
 
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static int tps65910_gpio_get(struct gpio_chip *gc, unsigned offset)
 
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{
 
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        struct tps65910 *tps65910 = container_of(gc, struct tps65910, gpio);
 
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        uint8_t val;
 
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        tps65910->read(tps65910, TPS65910_GPIO0 + offset, 1, &val);
 
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        if (val & GPIO_STS_MASK)
 
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                return 1;
 
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        return 0;
 
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}
 
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static void tps65910_gpio_set(struct gpio_chip *gc, unsigned offset,
 
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                              int value)
 
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{
 
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        struct tps65910 *tps65910 = container_of(gc, struct tps65910, gpio);
 
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        if (value)
 
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                tps65910_set_bits(tps65910, TPS65910_GPIO0 + offset,
 
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                                                GPIO_SET_MASK);
 
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        else
 
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                tps65910_clear_bits(tps65910, TPS65910_GPIO0 + offset,
 
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                                                GPIO_SET_MASK);
 
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}
 
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static int tps65910_gpio_output(struct gpio_chip *gc, unsigned offset,
 
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                                int value)
 
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{
 
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        struct tps65910 *tps65910 = container_of(gc, struct tps65910, gpio);
 
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        /* Set the initial value */
 
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        tps65910_gpio_set(gc, 0, value);
 
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        return tps65910_set_bits(tps65910, TPS65910_GPIO0 + offset,
 
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                                                GPIO_CFG_MASK);
 
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}
 
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static int tps65910_gpio_input(struct gpio_chip *gc, unsigned offset)
 
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{
 
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        struct tps65910 *tps65910 = container_of(gc, struct tps65910, gpio);
 
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        return tps65910_clear_bits(tps65910, TPS65910_GPIO0 + offset,
 
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                                                GPIO_CFG_MASK);
 
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}
 
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void tps65910_gpio_init(struct tps65910 *tps65910, int gpio_base)
 
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{
 
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        int ret;
 
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        if (!gpio_base)
 
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                return;
 
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        tps65910->gpio.owner            = THIS_MODULE;
 
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        tps65910->gpio.label            = tps65910->i2c_client->name;
 
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        tps65910->gpio.dev              = tps65910->dev;
 
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        tps65910->gpio.base             = gpio_base;
 
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        switch(tps65910_chip_id(tps65910)) {
 
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        case TPS65910:
 
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                tps65910->gpio.ngpio    = 6;
 
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                break;
 
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        case TPS65911:
 
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                tps65910->gpio.ngpio    = 9;
 
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                break;
 
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        default:
 
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                return;
 
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        }
 
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        tps65910->gpio.can_sleep        = 1;
 
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        tps65910->gpio.direction_input  = tps65910_gpio_input;
 
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        tps65910->gpio.direction_output = tps65910_gpio_output;
 
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        tps65910->gpio.set              = tps65910_gpio_set;
 
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        tps65910->gpio.get              = tps65910_gpio_get;
 
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        ret = gpiochip_add(&tps65910->gpio);
 
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        if (ret)
 
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                dev_warn(tps65910->dev, "GPIO registration failed: %d\n", ret);
 
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}