linux-imx

/*

 * Copyright (c) 2017 Chen-Yu Tsai. All rights reserved.

 *

 * This software is licensed under the terms of the GNU General Public

 * License version 2, as published by the Free Software Foundation, and

 * may be copied, distributed, and modified under those terms.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 */

​

#ifndef _CCU_SDM_H

#define _CCU_SDM_H

​

#include <linux/clk-provider.h>

​

#include "ccu_common.h"

​

struct ccu_sdm_setting {

    unsigned long   rate;

​

    /*

     * XXX We don't know what the step and bottom register fields

     * mean. Just copy the whole register value from the vendor

     * kernel for now.

     */

    u32     pattern;

​

    /*

     * M and N factors here should be the values used in

     * calculation, not the raw values written to registers

     */

    u32     m;

    u32     n;

};

​

struct ccu_sdm_internal {

    struct ccu_sdm_setting  *table;

    u32     table_size;

    /* early SoCs don't have the SDM enable bit in the PLL register */

    u32     enable;

    /* second enable bit in tuning register */

    u32     tuning_enable;

    u16     tuning_reg;

};

​

#define _SUNXI_CCU_SDM(_table, _enable,         \

               _reg, _reg_enable)       \

    {                       \

        .table      = _table,       \

        .table_size = ARRAY_SIZE(_table),   \

        .enable     = _enable,      \

        .tuning_enable  = _reg_enable,      \

        .tuning_reg = _reg,         \

    }

​

bool ccu_sdm_helper_is_enabled(struct ccu_common *common,

                   struct ccu_sdm_internal *sdm);

void ccu_sdm_helper_enable(struct ccu_common *common,

               struct ccu_sdm_internal *sdm,

               unsigned long rate);