linux-imx

/*

 * TI da8xx master peripheral priority driver

 *

 * Copyright (C) 2016 BayLibre SAS

 *

 * Author:

 *   Bartosz Golaszewski <bgolaszewski@baylibre.com>

 *

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

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 */

​

#include <linux/module.h>

#include <linux/of.h>

#include <linux/platform_device.h>

#include <linux/io.h>

#include <linux/regmap.h>

​

/*

 * REVISIT: Linux doesn't have a good framework for the kind of performance

 * knobs this driver controls. We can't use device tree properties as it deals

 * with hardware configuration rather than description. We also don't want to

 * commit to maintaining some random sysfs attributes.

 *

 * For now we just hardcode the register values for the boards that need

 * some changes (as is the case for the LCD controller on da850-lcdk - the

 * first board we support here). When linux gets an appropriate framework,

 * we'll easily convert the driver to it.

 */

​

#define DA8XX_MSTPRI0_OFFSET        0

#define DA8XX_MSTPRI1_OFFSET        4

#define DA8XX_MSTPRI2_OFFSET        8

​

enum {

    DA8XX_MSTPRI_ARM_I = 0,

    DA8XX_MSTPRI_ARM_D,

    DA8XX_MSTPRI_UPP,

    DA8XX_MSTPRI_SATA,

    DA8XX_MSTPRI_PRU0,

    DA8XX_MSTPRI_PRU1,

    DA8XX_MSTPRI_EDMA30TC0,

    DA8XX_MSTPRI_EDMA30TC1,

    DA8XX_MSTPRI_EDMA31TC0,

    DA8XX_MSTPRI_VPIF_DMA_0,

    DA8XX_MSTPRI_VPIF_DMA_1,

    DA8XX_MSTPRI_EMAC,

    DA8XX_MSTPRI_USB0CFG,

    DA8XX_MSTPRI_USB0CDMA,

    DA8XX_MSTPRI_UHPI,

    DA8XX_MSTPRI_USB1,

    DA8XX_MSTPRI_LCDC,

};

​

struct da8xx_mstpri_descr {

    int reg;

    int shift;

    int mask;

};

​

static const struct da8xx_mstpri_descr da8xx_mstpri_priority_list[] = {

    [DA8XX_MSTPRI_ARM_I] = {