1 /*
2 * Copyright (c) 2015, Freescale Semiconductor, Inc.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without modification,
6 * are permitted provided that the following conditions are met:
7 *
8 * o Redistributions of source code must retain the above copyright notice, this list
9 * of conditions and the following disclaimer.
10 *
11 * o Redistributions in binary form must reproduce the above copyright notice, this
12 * list of conditions and the following disclaimer in the documentation and/or
13 * other materials provided with the distribution.
14 *
15 * o Neither the name of Freescale Semiconductor, Inc. nor the names of its
16 * contributors may be used to endorse or promote products derived from this
17 * software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
21 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
22 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
23 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
24 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
25 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
26 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
28 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #include "ccm_imx7d.h"
32
33 /*******************************************************************************
34 * Code
35 ******************************************************************************/
36
37 /*FUNCTION**********************************************************************
38 *
39 * Function Name : CCM_SetDivider
40 * Description : Set root clock divider
41 *
42 *END**************************************************************************/
CCM_SetRootDivider(CCM_Type * base,uint32_t ccmRoot,uint32_t pre,uint32_t post)43 void CCM_SetRootDivider(CCM_Type * base, uint32_t ccmRoot, uint32_t pre, uint32_t post)
44 {
45 assert (pre < 8);
46 assert (post < 64);
47
48 CCM_REG(ccmRoot) = (CCM_REG(ccmRoot) &
49 (~(CCM_TARGET_ROOT_PRE_PODF_MASK | CCM_TARGET_ROOT_POST_PODF_MASK))) |
50 CCM_TARGET_ROOT_PRE_PODF(pre) | CCM_TARGET_ROOT_POST_PODF(post);
51 }
52
53 /*FUNCTION**********************************************************************
54 *
55 * Function Name : CCM_GetDivider
56 * Description : Get root clock divider
57 *
58 *END**************************************************************************/
CCM_GetRootDivider(CCM_Type * base,uint32_t ccmRoot,uint32_t * pre,uint32_t * post)59 void CCM_GetRootDivider(CCM_Type * base, uint32_t ccmRoot, uint32_t *pre, uint32_t *post)
60 {
61 assert (pre && post);
62
63 *pre = (CCM_REG(ccmRoot) & CCM_TARGET_ROOT_PRE_PODF_MASK) >> CCM_TARGET_ROOT_PRE_PODF_SHIFT;
64 *post = (CCM_REG(ccmRoot) & CCM_TARGET_ROOT_POST_PODF_MASK) >> CCM_TARGET_ROOT_POST_PODF_SHIFT;
65 }
66
67 /*FUNCTION**********************************************************************
68 *
69 * Function Name : CCM_UpdateRoot
70 * Description : Update clock root in one step, for dynamical clock switching
71 *
72 *END**************************************************************************/
CCM_UpdateRoot(CCM_Type * base,uint32_t ccmRoot,uint32_t mux,uint32_t pre,uint32_t post)73 void CCM_UpdateRoot(CCM_Type * base, uint32_t ccmRoot, uint32_t mux, uint32_t pre, uint32_t post)
74 {
75 assert (pre < 8);
76 assert (post < 64);
77
78 CCM_REG(ccmRoot) = (CCM_REG(ccmRoot) &
79 (~(CCM_TARGET_ROOT_MUX_MASK | CCM_TARGET_ROOT_PRE_PODF_MASK | CCM_TARGET_ROOT_POST_PODF_MASK))) |
80 CCM_TARGET_ROOT_MUX(mux) | CCM_TARGET_ROOT_PRE_PODF(pre) | CCM_TARGET_ROOT_POST_PODF(post);
81 }
82
83 /*******************************************************************************
84 * EOF
85 ******************************************************************************/
86
