1 /*
2 * Copyright 2023 NXP
3 *
4 * Based on clock_control_mcux_scg.c, which is:
5 * Copyright (c) 2019-2021 Vestas Wind Systems A/S
6 * Copyright (c) 2017, NXP
7 *
8 * SPDX-License-Identifier: Apache-2.0
9 */
10
11 #define DT_DRV_COMPAT nxp_scg_k4
12
13 #include <zephyr/drivers/clock_control.h>
14 #include <zephyr/dt-bindings/clock/scg_k4.h>
15 #include <soc.h>
16 #include <fsl_clock.h>
17
18 #define LOG_LEVEL CONFIG_CLOCK_CONTROL_LOG_LEVEL
19 #include <zephyr/logging/log.h>
20 LOG_MODULE_REGISTER(clock_control_scg);
21
22 #define MCUX_SCG_CLOCK_NODE(name) DT_INST_CHILD(0, name)
23
mcux_scg_k4_on(const struct device * dev,clock_control_subsys_t sub_system)24 static int mcux_scg_k4_on(const struct device *dev, clock_control_subsys_t sub_system)
25 {
26 return 0;
27 }
28
mcux_scg_k4_off(const struct device * dev,clock_control_subsys_t sub_system)29 static int mcux_scg_k4_off(const struct device *dev, clock_control_subsys_t sub_system)
30 {
31 return 0;
32 }
33
mcux_scg_k4_get_rate(const struct device * dev,clock_control_subsys_t sub_system,uint32_t * rate)34 static int mcux_scg_k4_get_rate(const struct device *dev, clock_control_subsys_t sub_system,
35 uint32_t *rate)
36 {
37 clock_name_t clock_name;
38
39 switch ((uint32_t)sub_system) {
40 case SCG_K4_CORESYS_CLK:
41 clock_name = kCLOCK_CoreSysClk;
42 break;
43 case SCG_K4_SLOW_CLK:
44 clock_name = kCLOCK_SlowClk;
45 break;
46 case SCG_K4_PLAT_CLK:
47 clock_name = kCLOCK_PlatClk;
48 break;
49 case SCG_K4_SYS_CLK:
50 clock_name = kCLOCK_SysClk;
51 break;
52 case SCG_K4_BUS_CLK:
53 clock_name = kCLOCK_BusClk;
54 break;
55 case SCG_K4_SYSOSC_CLK:
56 clock_name = kCLOCK_ScgSysOscClk;
57 break;
58 case SCG_K4_SIRC_CLK:
59 clock_name = kCLOCK_ScgSircClk;
60 break;
61 case SCG_K4_FIRC_CLK:
62 clock_name = kCLOCK_ScgFircClk;
63 break;
64 case SCG_K4_RTCOSC_CLK:
65 clock_name = kCLOCK_RtcOscClk;
66 break;
67 default:
68 LOG_ERR("Unsupported clock name");
69 return -EINVAL;
70 }
71
72 *rate = CLOCK_GetFreq(clock_name);
73 return 0;
74 }
75
76 static DEVICE_API(clock_control, mcux_scg_driver_api) = {
77 .on = mcux_scg_k4_on,
78 .off = mcux_scg_k4_off,
79 .get_rate = mcux_scg_k4_get_rate,
80 };
81
82 DEVICE_DT_INST_DEFINE(0, NULL, NULL, NULL, NULL, PRE_KERNEL_1,
83 CONFIG_CLOCK_CONTROL_INIT_PRIORITY, &mcux_scg_driver_api);
84
