1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * OMAP1 Dual-Mode Timers - platform device registration |
4 | * |
5 | * Contains first level initialization routines which internally |
6 | * generates timer device information and registers with linux |
7 | * device model. It also has a low level function to change the timer |
8 | * input clock source. |
9 | * |
10 | * Copyright (C) 2011 Texas Instruments Incorporated - https://www.ti.com/ |
11 | * Tarun Kanti DebBarma <tarun.kanti@ti.com> |
12 | * Thara Gopinath <thara@ti.com> |
13 | */ |
14 | |
15 | #include <linux/clk.h> |
16 | #include <linux/io.h> |
17 | #include <linux/err.h> |
18 | #include <linux/slab.h> |
19 | #include <linux/platform_device.h> |
20 | #include <linux/platform_data/dmtimer-omap.h> |
21 | #include <linux/soc/ti/omap1-io.h> |
22 | |
23 | #include <clocksource/timer-ti-dm.h> |
24 | |
25 | #include "soc.h" |
26 | |
27 | #define OMAP1610_GPTIMER1_BASE 0xfffb1400 |
28 | #define OMAP1610_GPTIMER2_BASE 0xfffb1c00 |
29 | #define OMAP1610_GPTIMER3_BASE 0xfffb2400 |
30 | #define OMAP1610_GPTIMER4_BASE 0xfffb2c00 |
31 | #define OMAP1610_GPTIMER5_BASE 0xfffb3400 |
32 | #define OMAP1610_GPTIMER6_BASE 0xfffb3c00 |
33 | #define OMAP1610_GPTIMER7_BASE 0xfffb7400 |
34 | #define OMAP1610_GPTIMER8_BASE 0xfffbd400 |
35 | |
36 | #define OMAP1_DM_TIMER_COUNT 8 |
37 | |
38 | static int omap1_dm_timer_set_src(struct platform_device *pdev, |
39 | int source) |
40 | { |
41 | int n = (pdev->id - 1) << 1; |
42 | u32 l; |
43 | |
44 | l = omap_readl(MOD_CONF_CTRL_1) & ~(0x03 << n); |
45 | l |= source << n; |
46 | omap_writel(v: l, MOD_CONF_CTRL_1); |
47 | |
48 | return 0; |
49 | } |
50 | |
51 | static int __init omap1_dm_timer_init(void) |
52 | { |
53 | int i; |
54 | int ret; |
55 | struct dmtimer_platform_data *pdata; |
56 | struct platform_device *pdev; |
57 | |
58 | if (!cpu_is_omap16xx()) |
59 | return 0; |
60 | |
61 | for (i = 1; i <= OMAP1_DM_TIMER_COUNT; i++) { |
62 | struct resource res[2]; |
63 | u32 base, irq; |
64 | |
65 | switch (i) { |
66 | case 1: |
67 | base = OMAP1610_GPTIMER1_BASE; |
68 | irq = INT_1610_GPTIMER1; |
69 | break; |
70 | case 2: |
71 | base = OMAP1610_GPTIMER2_BASE; |
72 | irq = INT_1610_GPTIMER2; |
73 | break; |
74 | case 3: |
75 | base = OMAP1610_GPTIMER3_BASE; |
76 | irq = INT_1610_GPTIMER3; |
77 | break; |
78 | case 4: |
79 | base = OMAP1610_GPTIMER4_BASE; |
80 | irq = INT_1610_GPTIMER4; |
81 | break; |
82 | case 5: |
83 | base = OMAP1610_GPTIMER5_BASE; |
84 | irq = INT_1610_GPTIMER5; |
85 | break; |
86 | case 6: |
87 | base = OMAP1610_GPTIMER6_BASE; |
88 | irq = INT_1610_GPTIMER6; |
89 | break; |
90 | case 7: |
91 | base = OMAP1610_GPTIMER7_BASE; |
92 | irq = INT_1610_GPTIMER7; |
93 | break; |
94 | case 8: |
95 | base = OMAP1610_GPTIMER8_BASE; |
96 | irq = INT_1610_GPTIMER8; |
97 | break; |
98 | default: |
99 | /* |
100 | * not supposed to reach here. |
101 | * this is to remove warning. |
102 | */ |
103 | return -EINVAL; |
104 | } |
105 | |
106 | pdev = platform_device_alloc(name: "omap_timer" , id: i); |
107 | if (!pdev) { |
108 | pr_err("%s: Failed to device alloc for dmtimer%d\n" , |
109 | __func__, i); |
110 | return -ENOMEM; |
111 | } |
112 | |
113 | memset(res, 0, 2 * sizeof(struct resource)); |
114 | res[0].start = base; |
115 | res[0].end = base + 0x46; |
116 | res[0].flags = IORESOURCE_MEM; |
117 | res[1].start = irq; |
118 | res[1].end = irq; |
119 | res[1].flags = IORESOURCE_IRQ; |
120 | ret = platform_device_add_resources(pdev, res, |
121 | ARRAY_SIZE(res)); |
122 | if (ret) { |
123 | dev_err(&pdev->dev, "%s: Failed to add resources.\n" , |
124 | __func__); |
125 | goto err_free_pdev; |
126 | } |
127 | |
128 | pdata = kzalloc(size: sizeof(*pdata), GFP_KERNEL); |
129 | if (!pdata) { |
130 | ret = -ENOMEM; |
131 | goto err_free_pdata; |
132 | } |
133 | |
134 | pdata->set_timer_src = omap1_dm_timer_set_src; |
135 | pdata->timer_capability = OMAP_TIMER_ALWON | |
136 | OMAP_TIMER_NEEDS_RESET | OMAP_TIMER_HAS_DSP_IRQ; |
137 | |
138 | ret = platform_device_add_data(pdev, data: pdata, size: sizeof(*pdata)); |
139 | if (ret) { |
140 | dev_err(&pdev->dev, "%s: Failed to add platform data.\n" , |
141 | __func__); |
142 | goto err_free_pdata; |
143 | } |
144 | |
145 | ret = platform_device_add(pdev); |
146 | if (ret) { |
147 | dev_err(&pdev->dev, "%s: Failed to add platform device.\n" , |
148 | __func__); |
149 | goto err_free_pdata; |
150 | } |
151 | |
152 | dev_dbg(&pdev->dev, " Registered.\n" ); |
153 | } |
154 | |
155 | return 0; |
156 | |
157 | err_free_pdata: |
158 | kfree(objp: pdata); |
159 | |
160 | err_free_pdev: |
161 | platform_device_put(pdev); |
162 | |
163 | return ret; |
164 | } |
165 | arch_initcall(omap1_dm_timer_init); |
166 | |