tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1// SPDX-License-Identifier: GPL-2.0-only
2
3#include <linux/kernel.h>
4#include <linux/clk.h>
5#include <linux/clk-provider.h>
6#include <linux/clk/ti.h>
7#include <linux/of_platform.h>
8#include <dt-bindings/clock/dm814.h>
9
10#include "clock.h"
11
12static const struct omap_clkctrl_reg_data dm814_default_clkctrl_regs[] __initconst = {
13 { DM814_USB_OTG_HS_CLKCTRL, NULL, CLKF_SW_SUP, "pll260dcoclkldo" },
14 { 0 },
15};
16
17static const struct omap_clkctrl_reg_data dm814_alwon_clkctrl_regs[] __initconst = {
18 { DM814_UART1_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk10_ck" },
19 { DM814_UART2_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk10_ck" },
20 { DM814_UART3_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk10_ck" },
21 { DM814_GPIO1_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk6_ck" },
22 { DM814_GPIO2_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk6_ck" },
23 { DM814_I2C1_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk10_ck" },
24 { DM814_I2C2_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk10_ck" },
25 { DM814_WD_TIMER_CLKCTRL, NULL, CLKF_SW_SUP | CLKF_NO_IDLEST, "sysclk18_ck" },
26 { DM814_MCSPI1_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk10_ck" },
27 { DM814_GPMC_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk6_ck" },
28 { DM814_CPGMAC0_CLKCTRL, NULL, CLKF_SW_SUP, "cpsw_125mhz_gclk" },
29 { DM814_MPU_CLKCTRL, NULL, CLKF_SW_SUP, "mpu_ck" },
30 { DM814_RTC_CLKCTRL, NULL, CLKF_SW_SUP | CLKF_NO_IDLEST, "sysclk18_ck" },
31 { DM814_TPCC_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk4_ck" },
32 { DM814_TPTC0_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk4_ck" },
33 { DM814_TPTC1_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk4_ck" },
34 { DM814_TPTC2_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk4_ck" },
35 { DM814_TPTC3_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk4_ck" },
36 { DM814_MMC1_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk8_ck" },
37 { DM814_MMC2_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk8_ck" },
38 { DM814_MMC3_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk8_ck" },
39 { 0 },
40};
41
42const struct omap_clkctrl_data dm814_clkctrl_data[] __initconst = {
43 { 0x48180500, dm814_default_clkctrl_regs },
44 { 0x48181400, dm814_alwon_clkctrl_regs },
45 { 0 },
46};
47
48static struct ti_dt_clk dm814_clks[] = {
49 DT_CLK(NULL, "timer_sys_ck", "devosc_ck"),
50 { .node_name = NULL },
51};
52
53static bool timer_clocks_initialized;
54
55static int __init dm814x_adpll_early_init(void)
56{
57 struct device_node *np;
58
59 if (!timer_clocks_initialized)
60 return -ENODEV;
61
62 np = of_find_node_by_name(NULL, "pllss");
63 if (!np) {
64 pr_err("Could not find node for plls\n");
65 return -ENODEV;
66 }
67
68 of_platform_populate(np, NULL, NULL, NULL);
69
70 return 0;
71}
72core_initcall(dm814x_adpll_early_init);
73
74static const char * const init_clocks[] = {
75 "pll040clkout", /* MPU 481c5040.adpll.clkout */
76 "pll290clkout", /* DDR 481c5290.adpll.clkout */
77};
78
79static int __init dm814x_adpll_enable_init_clocks(void)
80{
81 int i, err;
82
83 if (!timer_clocks_initialized)
84 return -ENODEV;
85
86 for (i = 0; i < ARRAY_SIZE(init_clocks); i++) {
87 struct clk *clock;
88
89 clock = clk_get(NULL, init_clocks[i]);
90 if (WARN(IS_ERR(clock), "could not find init clock %s\n",
91 init_clocks[i]))
92 continue;
93 err = clk_prepare_enable(clock);
94 if (WARN(err, "could not enable init clock %s\n",
95 init_clocks[i]))
96 continue;
97 }
98
99 return 0;
100}
101postcore_initcall(dm814x_adpll_enable_init_clocks);
102
103int __init dm814x_dt_clk_init(void)
104{
105 ti_dt_clocks_register(dm814_clks);
106 omap2_clk_disable_autoidle_all();
107 ti_clk_add_aliases();
108 omap2_clk_enable_init_clocks(NULL, 0);
109 timer_clocks_initialized = true;
110
111 return 0;
112}