1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0-only */ 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * Copyright (c) 2017 Chen-Yu Tsai. All rights reserved. 4*4882a593Smuzhiyun */ 5*4882a593Smuzhiyun 6*4882a593Smuzhiyun #ifndef _CCU_SDM_H 7*4882a593Smuzhiyun #define _CCU_SDM_H 8*4882a593Smuzhiyun 9*4882a593Smuzhiyun #include <linux/clk-provider.h> 10*4882a593Smuzhiyun 11*4882a593Smuzhiyun #include "ccu_common.h" 12*4882a593Smuzhiyun 13*4882a593Smuzhiyun struct ccu_sdm_setting { 14*4882a593Smuzhiyun unsigned long rate; 15*4882a593Smuzhiyun 16*4882a593Smuzhiyun /* 17*4882a593Smuzhiyun * XXX We don't know what the step and bottom register fields 18*4882a593Smuzhiyun * mean. Just copy the whole register value from the vendor 19*4882a593Smuzhiyun * kernel for now. 20*4882a593Smuzhiyun */ 21*4882a593Smuzhiyun u32 pattern; 22*4882a593Smuzhiyun 23*4882a593Smuzhiyun /* 24*4882a593Smuzhiyun * M and N factors here should be the values used in 25*4882a593Smuzhiyun * calculation, not the raw values written to registers 26*4882a593Smuzhiyun */ 27*4882a593Smuzhiyun u32 m; 28*4882a593Smuzhiyun u32 n; 29*4882a593Smuzhiyun }; 30*4882a593Smuzhiyun 31*4882a593Smuzhiyun struct ccu_sdm_internal { 32*4882a593Smuzhiyun struct ccu_sdm_setting *table; 33*4882a593Smuzhiyun u32 table_size; 34*4882a593Smuzhiyun /* early SoCs don't have the SDM enable bit in the PLL register */ 35*4882a593Smuzhiyun u32 enable; 36*4882a593Smuzhiyun /* second enable bit in tuning register */ 37*4882a593Smuzhiyun u32 tuning_enable; 38*4882a593Smuzhiyun u16 tuning_reg; 39*4882a593Smuzhiyun }; 40*4882a593Smuzhiyun 41*4882a593Smuzhiyun #define _SUNXI_CCU_SDM(_table, _enable, \ 42*4882a593Smuzhiyun _reg, _reg_enable) \ 43*4882a593Smuzhiyun { \ 44*4882a593Smuzhiyun .table = _table, \ 45*4882a593Smuzhiyun .table_size = ARRAY_SIZE(_table), \ 46*4882a593Smuzhiyun .enable = _enable, \ 47*4882a593Smuzhiyun .tuning_enable = _reg_enable, \ 48*4882a593Smuzhiyun .tuning_reg = _reg, \ 49*4882a593Smuzhiyun } 50*4882a593Smuzhiyun 51*4882a593Smuzhiyun bool ccu_sdm_helper_is_enabled(struct ccu_common *common, 52*4882a593Smuzhiyun struct ccu_sdm_internal *sdm); 53*4882a593Smuzhiyun void ccu_sdm_helper_enable(struct ccu_common *common, 54*4882a593Smuzhiyun struct ccu_sdm_internal *sdm, 55*4882a593Smuzhiyun unsigned long rate); 56*4882a593Smuzhiyun void ccu_sdm_helper_disable(struct ccu_common *common, 57*4882a593Smuzhiyun struct ccu_sdm_internal *sdm); 58*4882a593Smuzhiyun 59*4882a593Smuzhiyun bool ccu_sdm_helper_has_rate(struct ccu_common *common, 60*4882a593Smuzhiyun struct ccu_sdm_internal *sdm, 61*4882a593Smuzhiyun unsigned long rate); 62*4882a593Smuzhiyun 63*4882a593Smuzhiyun unsigned long ccu_sdm_helper_read_rate(struct ccu_common *common, 64*4882a593Smuzhiyun struct ccu_sdm_internal *sdm, 65*4882a593Smuzhiyun u32 m, u32 n); 66*4882a593Smuzhiyun 67*4882a593Smuzhiyun int ccu_sdm_helper_get_factors(struct ccu_common *common, 68*4882a593Smuzhiyun struct ccu_sdm_internal *sdm, 69*4882a593Smuzhiyun unsigned long rate, 70*4882a593Smuzhiyun unsigned long *m, unsigned long *n); 71*4882a593Smuzhiyun 72*4882a593Smuzhiyun #endif 73