linux-imx

/*

 * MPC512x PSC in SPI mode driver.

 *

 * Copyright (C) 2007,2008 Freescale Semiconductor Inc.

 * Original port from 52xx driver:

 *  Hongjun Chen <hong-jun.chen@freescale.com>

 *

 * Fork of mpc52xx_psc_spi.c:

 *  Copyright (C) 2006 TOPTICA Photonics AG., Dragos Carp

 *

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

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

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

 * option) any later version.

 */

​

#include <linux/module.h>

#include <linux/kernel.h>

#include <linux/errno.h>

#include <linux/interrupt.h>

#include <linux/of_address.h>

#include <linux/of_irq.h>

#include <linux/of_platform.h>

#include <linux/completion.h>

#include <linux/io.h>

#include <linux/delay.h>

#include <linux/clk.h>

#include <linux/spi/spi.h>

#include <linux/fsl_devices.h>

#include <linux/gpio.h>

#include <asm/mpc52xx_psc.h>

​

enum {

    TYPE_MPC5121,

    TYPE_MPC5125,

};

​

/*

 * This macro abstracts the differences in the PSC register layout between

 * MPC5121 (which uses a struct mpc52xx_psc) and MPC5125 (using mpc5125_psc).

 */

#define psc_addr(mps, regname) ({                   \

    void *__ret = NULL;                     \

    switch (mps->type) {                        \

    case TYPE_MPC5121: {                        \

            struct mpc52xx_psc __iomem *psc = mps->psc; \

            __ret = &psc->regname;              \

        };                          \

        break;                          \

    case TYPE_MPC5125: {                        \

            struct mpc5125_psc __iomem *psc = mps->psc; \

            __ret = &psc->regname;              \

        };                          \

        break;                          \

    }                               \

    __ret; })

​

struct mpc512x_psc_spi {

    void (*cs_control)(struct spi_device *spi, bool on);

​

    /* driver internal data */

    int type;

    void __iomem *psc;