drivers/clk/mediatek/clk-mt8186-mcu.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 //
   3 // Copyright (c) 2022 MediaTek Inc.
   4 // Author: Chun-Jie Chen <chun-jie.chen@mediatek.com>
   5
   6 #include <linux/clk-provider.h>
   7 #include <linux/platform_device.h>
   8 #include <dt-bindings/clock/mt8186-clk.h>
   9
  10 #include "clk-mtk.h"
  11
  12 static const char * const mcu_armpll_ll_parents[] = {
  13         "clk26m",
  14         "armpll_ll",
  15         "mainpll",
  16         "univpll_d2"
  17 };
  18
  19 static const char * const mcu_armpll_bl_parents[] = {
  20         "clk26m",
  21         "armpll_bl",
  22         "mainpll",
  23         "univpll_d2"
  24 };
  25
  26 static const char * const mcu_armpll_bus_parents[] = {
  27         "clk26m",
  28         "ccipll",
  29         "mainpll",
  30         "univpll_d2"
  31 };
  32
  33 /*
  34  * We only configure the CPU muxes when adjust CPU frequency in MediaTek CPUFreq Driver.
  35  * Other fields like divider always keep the same value. (set once in bootloader)
  36  */
  37 static struct mtk_composite mcu_muxes[] = {
  38         /* CPU_PLLDIV_CFG0 */
  39         MUX(CLK_MCU_ARMPLL_LL_SEL, "mcu_armpll_ll_sel", mcu_armpll_ll_parents, 0x2A0, 9, 2),
  40         /* CPU_PLLDIV_CFG1 */
  41         MUX(CLK_MCU_ARMPLL_BL_SEL, "mcu_armpll_bl_sel", mcu_armpll_bl_parents, 0x2A4, 9, 2),
  42         /* BUS_PLLDIV_CFG */
  43         MUX(CLK_MCU_ARMPLL_BUS_SEL, "mcu_armpll_bus_sel", mcu_armpll_bus_parents, 0x2E0, 9, 2),
  44 };
  45
  46 static const struct mtk_clk_desc mcu_desc = {
  47         .composite_clks = mcu_muxes,
  48         .num_composite_clks = ARRAY_SIZE(mcu_muxes),
  49 };
  50
  51 static const struct of_device_id of_match_clk_mt8186_mcu[] = {
  52         { .compatible = "mediatek,mt8186-mcusys", .data = &mcu_desc },
  53         { /* sentinel */}
  54 };
  55 MODULE_DEVICE_TABLE(of, of_match_clk_mt8186_mcu);
  56
  57 static struct platform_driver clk_mt8186_mcu_drv = {
  58         .driver = {
  59                 .name = "clk-mt8186-mcu",
  60                 .of_match_table = of_match_clk_mt8186_mcu,
  61         },
  62         .probe = mtk_clk_simple_probe,
  63         .remove = mtk_clk_simple_remove,
  64 };
  65 module_platform_driver(clk_mt8186_mcu_drv);
  66
  67 MODULE_DESCRIPTION("MediaTek MT8186 mcusys clocks driver");
  68 MODULE_LICENSE("GPL");