linux-imx

/*======================================================================

​

    Device driver for the PCMCIA control functionality of StrongARM

    SA-1100 microprocessors.

​

    The contents of this file are subject to the Mozilla Public

    License Version 1.1 (the "License"); you may not use this file

    except in compliance with the License. You may obtain a copy of

    the License at http://www.mozilla.org/MPL/

​

    Software distributed under the License is distributed on an "AS

    IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or

    implied. See the License for the specific language governing

    rights and limitations under the License.

​

    The initial developer of the original code is John G. Dorsey

    <john+@cs.cmu.edu>.  Portions created by John G. Dorsey are

    Copyright (C) 1999 John G. Dorsey.  All Rights Reserved.

​

    Alternatively, the contents of this file may be used under the

    terms of the GNU Public License version 2 (the "GPL"), in which

    case the provisions of the GPL are applicable instead of the

    above.  If you wish to allow the use of your version of this file

    only under the terms of the GPL and not to allow others to use

    your version of this file under the MPL, indicate your decision

    by deleting the provisions above and replace them with the notice

    and other provisions required by the GPL.  If you do not delete

    the provisions above, a recipient may use your version of this

    file under either the MPL or the GPL.

======================================================================*/

​

#include <linux/module.h>

#include <linux/gpio/consumer.h>

#include <linux/init.h>

#include <linux/regulator/consumer.h>

#include <linux/slab.h>

#include <linux/platform_device.h>

​

#include <pcmcia/ss.h>

​

#include <asm/hardware/scoop.h>

​

#include "sa1100_generic.h"

​

static const char *sa11x0_cf_gpio_names[] = {

    [SOC_STAT_CD] = "detect",

    [SOC_STAT_BVD1] = "bvd1",

    [SOC_STAT_BVD2] = "bvd2",

    [SOC_STAT_RDY] = "ready",

};

​

static int sa11x0_cf_hw_init(struct soc_pcmcia_socket *skt)

{

    struct device *dev = skt->socket.dev.parent;

    int i;

​

    skt->gpio_reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);

    if (IS_ERR(skt->gpio_reset))

        return PTR_ERR(skt->gpio_reset);

​

    skt->gpio_bus_enable = devm_gpiod_get_optional(dev, "bus-enable",

                               GPIOD_OUT_HIGH);

    if (IS_ERR(skt->gpio_bus_enable))

        return PTR_ERR(skt->gpio_bus_enable);

​

    skt->vcc.reg = devm_regulator_get_optional(dev, "vcc");

    if (IS_ERR(skt->vcc.reg))

        return PTR_ERR(skt->vcc.reg);

​

    if (!skt->vcc.reg)

        dev_warn(dev,

             "no Vcc regulator provided, ignoring Vcc controls\n");

​

    for (i = 0; i < ARRAY_SIZE(sa11x0_cf_gpio_names); i++) {

        skt->stat[i].name = sa11x0_cf_gpio_names[i];

        skt->stat[i].desc = devm_gpiod_get_optional(dev,

                    sa11x0_cf_gpio_names[i], GPIOD_IN);

        if (IS_ERR(skt->stat[i].desc))

            return PTR_ERR(skt->stat[i].desc);

    }

    return 0;

}

​

static int sa11x0_cf_configure_socket(struct soc_pcmcia_socket *skt,

    const socket_state_t *state)

{

    return soc_pcmcia_regulator_set(skt, &skt->vcc, state->Vcc);

}

​

static struct pcmcia_low_level sa11x0_cf_ops = {

    .owner = THIS_MODULE,