ti_clk_dpll.h

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 2017 Emmanuel Vadot <manu@freebsd.org>
    5  *
    6  * Copyright (c) 2020 Oskar Holmlund <oskar.holmlund@ohdata.se>
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
   22  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   23  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
   24  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
   25  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   27  * SUCH DAMAGE.
   28  *
   29  * $FreeBSD$
   30  */
   31 
   32 #ifndef _TI_DPLL_CLOCK_H_
   33 #define _TI_DPLL_CLOCK_H_
   34 
   35 #include <dev/extres/clk/clk.h>
   36 
   37 /* Registers are described in AM335x TRM chapter 8.1.12.2.* */
   38 
   39 /* Register offsets */
   40 #define CM_CLKSEL_DPLL_PERIPH                   0x49C
   41 
   42 /* CM_IDLEST_DPLL_xxx */
   43 #define ST_MN_BYPASS_MASK       0x0100
   44 #define ST_MN_BYPASS_SHIFT      8
   45 #define ST_DPLL_CLK_MASK        0x0001
   46 
   47 /* CM_CLKMODE_DPLL_DPLL_EN feature flag */
   48 #define LOW_POWER_STOP_MODE_FLAG                0x01
   49 #define MN_BYPASS_MODE_FLAG                     0x02
   50 #define IDLE_BYPASS_LOW_POWER_MODE_FLAG         0x04
   51 #define IDLE_BYPASS_FAST_RELOCK_MODE_FLAG       0x08
   52 #define LOCK_MODE_FLAG                          0x10
   53 
   54 /* CM_CLKMODE_DPLL_xxx */
   55 #define DPLL_EN_LOW_POWER_STOP_MODE             0x01
   56 #define DPLL_EN_MN_BYPASS_MODE                  0x04
   57 #define DPLL_EN_IDLE_BYPASS_LOW_POWER_MODE      0x05
   58 #define DPLL_EN_IDLE_BYPASS_FAST_RELOCK_MODE    0x06
   59 #define DPLL_EN_LOCK_MODE                       0x07
   60 
   61 #define TI_CLK_FACTOR_ZERO_BASED        0x0002
   62 #define TI_CLK_FACTOR_FIXED             0x0008
   63 #define TI_CLK_FACTOR_MIN_VALUE         0x0020
   64 #define TI_CLK_FACTOR_MAX_VALUE         0x0040
   65 
   66 /* Based on aw_clk_factor sys/arm/allwinner/clkng/aw_clk.h */
   67 struct ti_clk_factor {
   68         uint32_t        shift;  /* Shift bits for the factor */
   69         uint32_t        mask;   /* Mask to get the factor */
   70         uint32_t        width;  /* Number of bits for the factor */
   71         uint32_t        value;  /* Fixed value */
   72 
   73         uint32_t        min_value;
   74         uint32_t        max_value;
   75 
   76         uint32_t        flags;  /* Flags */
   77 };
   78 
   79 struct ti_clk_dpll_def {
   80         struct clknode_init_def clkdef;
   81 
   82         uint32_t                ti_clkmode_offset; /* control */
   83         uint8_t                 ti_clkmode_flags;
   84 
   85         uint32_t                ti_idlest_offset;
   86 
   87         uint32_t                ti_clksel_offset; /* mult-div1 */
   88         struct ti_clk_factor    ti_clksel_mult;
   89         struct ti_clk_factor    ti_clksel_div;
   90 
   91         uint32_t                ti_autoidle_offset;
   92 };
   93 
   94 int ti_clknode_dpll_register(struct clkdom *clkdom, struct ti_clk_dpll_def *clkdef);
   95 
   96 #endif /* _TI_DPLL_CLOCK_H_ */

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FreeBSD/Linux Kernel Cross Reference sys/arm/ti/clk/ti_clk_dpll.h

FreeBSD/Linux Kernel Cross Reference
sys/arm/ti/clk/ti_clk_dpll.h