1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Copyright (c) 2016 Icenowy Zheng <icenowy@aosc.xyz>
4  */
5 
6 #include <linux/clk-provider.h>
7 #include <linux/module.h>
8 #include <linux/of.h>
9 #include <linux/platform_device.h>
10 
11 #include "ccu_common.h"
12 #include "ccu_reset.h"
13 
14 #include "ccu_div.h"
15 #include "ccu_gate.h"
16 #include "ccu_mp.h"
17 #include "ccu_nm.h"
18 
19 #include "ccu-sun8i-r.h"
20 
21 static const struct clk_parent_data ar100_parents[] = {
22 	{ .fw_name = "losc" },
23 	{ .fw_name = "hosc" },
24 	{ .fw_name = "pll-periph" },
25 	{ .fw_name = "iosc" },
26 };
27 
28 static const struct ccu_mux_var_prediv ar100_predivs[] = {
29 	{ .index = 2, .shift = 8, .width = 5 },
30 };
31 
32 static struct ccu_div ar100_clk = {
33 	.div		= _SUNXI_CCU_DIV_FLAGS(4, 2, CLK_DIVIDER_POWER_OF_TWO),
34 
35 	.mux		= {
36 		.shift	= 16,
37 		.width	= 2,
38 
39 		.var_predivs	= ar100_predivs,
40 		.n_var_predivs	= ARRAY_SIZE(ar100_predivs),
41 	},
42 
43 	.common		= {
44 		.reg		= 0x00,
45 		.features	= CCU_FEATURE_VARIABLE_PREDIV,
46 		.hw.init	= CLK_HW_INIT_PARENTS_DATA("ar100",
47 							   ar100_parents,
48 							   &ccu_div_ops,
49 							   0),
50 	},
51 };
52 
53 static CLK_FIXED_FACTOR_HW(ahb0_clk, "ahb0", &ar100_clk.common.hw, 1, 1, 0);
54 
55 static SUNXI_CCU_M(apb0_clk, "apb0", "ahb0", 0x0c, 0, 2, 0);
56 
57 /*
58  * Define the parent as an array that can be reused to save space
59  * instead of having compound literals for each gate. Also have it
60  * non-const so we can change it on the A83T.
61  */
62 static const struct clk_hw *apb0_gate_parent[] = { &apb0_clk.common.hw };
63 static SUNXI_CCU_GATE_HWS(apb0_pio_clk,		"apb0-pio",
64 			  apb0_gate_parent, 0x28, BIT(0), 0);
65 static SUNXI_CCU_GATE_HWS(apb0_ir_clk,		"apb0-ir",
66 			  apb0_gate_parent, 0x28, BIT(1), 0);
67 static SUNXI_CCU_GATE_HWS(apb0_timer_clk,	"apb0-timer",
68 			  apb0_gate_parent, 0x28, BIT(2), 0);
69 static SUNXI_CCU_GATE_HWS(apb0_rsb_clk,		"apb0-rsb",
70 			  apb0_gate_parent, 0x28, BIT(3), 0);
71 static SUNXI_CCU_GATE_HWS(apb0_uart_clk,	"apb0-uart",
72 			  apb0_gate_parent, 0x28, BIT(4), 0);
73 static SUNXI_CCU_GATE_HWS(apb0_i2c_clk,		"apb0-i2c",
74 			  apb0_gate_parent, 0x28, BIT(6), 0);
75 static SUNXI_CCU_GATE_HWS(apb0_twd_clk,		"apb0-twd",
76 			  apb0_gate_parent, 0x28, BIT(7), 0);
77 
78 static const char * const r_mod0_default_parents[] = { "osc32k", "osc24M" };
79 static SUNXI_CCU_MP_WITH_MUX_GATE(ir_clk, "ir",
80 				  r_mod0_default_parents, 0x54,
81 				  0, 4,		/* M */
82 				  16, 2,	/* P */
83 				  24, 2,	/* mux */
84 				  BIT(31),	/* gate */
85 				  0);
86 
87 static const struct clk_parent_data a83t_r_mod0_parents[] = {
88 	{ .fw_name = "iosc" },
89 	{ .fw_name = "hosc" },
90 };
91 static const struct ccu_mux_fixed_prediv a83t_ir_predivs[] = {
92 	{ .index = 0, .div = 16 },
93 };
94 static struct ccu_mp a83t_ir_clk = {
95 	.enable	= BIT(31),
96 
97 	.m	= _SUNXI_CCU_DIV(0, 4),
98 	.p	= _SUNXI_CCU_DIV(16, 2),
99 
100 	.mux	= {
101 		.shift	= 24,
102 		.width	= 2,
103 		.fixed_predivs	= a83t_ir_predivs,
104 		.n_predivs	= ARRAY_SIZE(a83t_ir_predivs),
105 	},
106 
107 	.common		= {
108 		.reg		= 0x54,
109 		.features	= CCU_FEATURE_VARIABLE_PREDIV,
110 		.hw.init	= CLK_HW_INIT_PARENTS_DATA("ir",
111 							   a83t_r_mod0_parents,
112 							   &ccu_mp_ops,
113 							   0),
114 	},
115 };
116 
117 static struct ccu_common *sun8i_r_ccu_clks[] = {
118 	&ar100_clk.common,
119 	&apb0_clk.common,
120 	&apb0_pio_clk.common,
121 	&apb0_ir_clk.common,
122 	&apb0_timer_clk.common,
123 	&apb0_rsb_clk.common,
124 	&apb0_uart_clk.common,
125 	&apb0_i2c_clk.common,
126 	&apb0_twd_clk.common,
127 	&ir_clk.common,
128 	&a83t_ir_clk.common,
129 };
130 
131 static struct clk_hw_onecell_data sun8i_a83t_r_hw_clks = {
132 	.hws	= {
133 		[CLK_AR100]		= &ar100_clk.common.hw,
134 		[CLK_AHB0]		= &ahb0_clk.hw,
135 		[CLK_APB0]		= &apb0_clk.common.hw,
136 		[CLK_APB0_PIO]		= &apb0_pio_clk.common.hw,
137 		[CLK_APB0_IR]		= &apb0_ir_clk.common.hw,
138 		[CLK_APB0_TIMER]	= &apb0_timer_clk.common.hw,
139 		[CLK_APB0_RSB]		= &apb0_rsb_clk.common.hw,
140 		[CLK_APB0_UART]		= &apb0_uart_clk.common.hw,
141 		[CLK_APB0_I2C]		= &apb0_i2c_clk.common.hw,
142 		[CLK_APB0_TWD]		= &apb0_twd_clk.common.hw,
143 		[CLK_IR]		= &a83t_ir_clk.common.hw,
144 	},
145 	.num	= CLK_NUMBER,
146 };
147 
148 static struct clk_hw_onecell_data sun8i_h3_r_hw_clks = {
149 	.hws	= {
150 		[CLK_AR100]		= &ar100_clk.common.hw,
151 		[CLK_AHB0]		= &ahb0_clk.hw,
152 		[CLK_APB0]		= &apb0_clk.common.hw,
153 		[CLK_APB0_PIO]		= &apb0_pio_clk.common.hw,
154 		[CLK_APB0_IR]		= &apb0_ir_clk.common.hw,
155 		[CLK_APB0_TIMER]	= &apb0_timer_clk.common.hw,
156 		[CLK_APB0_UART]		= &apb0_uart_clk.common.hw,
157 		[CLK_APB0_I2C]		= &apb0_i2c_clk.common.hw,
158 		[CLK_APB0_TWD]		= &apb0_twd_clk.common.hw,
159 		[CLK_IR]		= &ir_clk.common.hw,
160 	},
161 	.num	= CLK_NUMBER,
162 };
163 
164 static struct clk_hw_onecell_data sun50i_a64_r_hw_clks = {
165 	.hws	= {
166 		[CLK_AR100]		= &ar100_clk.common.hw,
167 		[CLK_AHB0]		= &ahb0_clk.hw,
168 		[CLK_APB0]		= &apb0_clk.common.hw,
169 		[CLK_APB0_PIO]		= &apb0_pio_clk.common.hw,
170 		[CLK_APB0_IR]		= &apb0_ir_clk.common.hw,
171 		[CLK_APB0_TIMER]	= &apb0_timer_clk.common.hw,
172 		[CLK_APB0_RSB]		= &apb0_rsb_clk.common.hw,
173 		[CLK_APB0_UART]		= &apb0_uart_clk.common.hw,
174 		[CLK_APB0_I2C]		= &apb0_i2c_clk.common.hw,
175 		[CLK_APB0_TWD]		= &apb0_twd_clk.common.hw,
176 		[CLK_IR]		= &ir_clk.common.hw,
177 	},
178 	.num	= CLK_NUMBER,
179 };
180 
181 static struct ccu_reset_map sun8i_a83t_r_ccu_resets[] = {
182 	[RST_APB0_IR]		=  { 0xb0, BIT(1) },
183 	[RST_APB0_TIMER]	=  { 0xb0, BIT(2) },
184 	[RST_APB0_RSB]		=  { 0xb0, BIT(3) },
185 	[RST_APB0_UART]		=  { 0xb0, BIT(4) },
186 	[RST_APB0_I2C]		=  { 0xb0, BIT(6) },
187 };
188 
189 static struct ccu_reset_map sun8i_h3_r_ccu_resets[] = {
190 	[RST_APB0_IR]		=  { 0xb0, BIT(1) },
191 	[RST_APB0_TIMER]	=  { 0xb0, BIT(2) },
192 	[RST_APB0_UART]		=  { 0xb0, BIT(4) },
193 	[RST_APB0_I2C]		=  { 0xb0, BIT(6) },
194 };
195 
196 static struct ccu_reset_map sun50i_a64_r_ccu_resets[] = {
197 	[RST_APB0_IR]		=  { 0xb0, BIT(1) },
198 	[RST_APB0_TIMER]	=  { 0xb0, BIT(2) },
199 	[RST_APB0_RSB]		=  { 0xb0, BIT(3) },
200 	[RST_APB0_UART]		=  { 0xb0, BIT(4) },
201 	[RST_APB0_I2C]		=  { 0xb0, BIT(6) },
202 };
203 
204 static const struct sunxi_ccu_desc sun8i_a83t_r_ccu_desc = {
205 	.ccu_clks	= sun8i_r_ccu_clks,
206 	.num_ccu_clks	= ARRAY_SIZE(sun8i_r_ccu_clks),
207 
208 	.hw_clks	= &sun8i_a83t_r_hw_clks,
209 
210 	.resets		= sun8i_a83t_r_ccu_resets,
211 	.num_resets	= ARRAY_SIZE(sun8i_a83t_r_ccu_resets),
212 };
213 
214 static const struct sunxi_ccu_desc sun8i_h3_r_ccu_desc = {
215 	.ccu_clks	= sun8i_r_ccu_clks,
216 	.num_ccu_clks	= ARRAY_SIZE(sun8i_r_ccu_clks),
217 
218 	.hw_clks	= &sun8i_h3_r_hw_clks,
219 
220 	.resets		= sun8i_h3_r_ccu_resets,
221 	.num_resets	= ARRAY_SIZE(sun8i_h3_r_ccu_resets),
222 };
223 
224 static const struct sunxi_ccu_desc sun50i_a64_r_ccu_desc = {
225 	.ccu_clks	= sun8i_r_ccu_clks,
226 	.num_ccu_clks	= ARRAY_SIZE(sun8i_r_ccu_clks),
227 
228 	.hw_clks	= &sun50i_a64_r_hw_clks,
229 
230 	.resets		= sun50i_a64_r_ccu_resets,
231 	.num_resets	= ARRAY_SIZE(sun50i_a64_r_ccu_resets),
232 };
233 
sun8i_r_ccu_probe(struct platform_device * pdev)234 static int sun8i_r_ccu_probe(struct platform_device *pdev)
235 {
236 	const struct sunxi_ccu_desc *desc;
237 	void __iomem *reg;
238 
239 	desc = of_device_get_match_data(&pdev->dev);
240 	if (!desc)
241 		return -EINVAL;
242 
243 	reg = devm_platform_ioremap_resource(pdev, 0);
244 	if (IS_ERR(reg))
245 		return PTR_ERR(reg);
246 
247 	return devm_sunxi_ccu_probe(&pdev->dev, reg, desc);
248 }
249 
250 static const struct of_device_id sun8i_r_ccu_ids[] = {
251 	{
252 		.compatible = "allwinner,sun8i-a83t-r-ccu",
253 		.data = &sun8i_a83t_r_ccu_desc,
254 	},
255 	{
256 		.compatible = "allwinner,sun8i-h3-r-ccu",
257 		.data = &sun8i_h3_r_ccu_desc,
258 	},
259 	{
260 		.compatible = "allwinner,sun50i-a64-r-ccu",
261 		.data = &sun50i_a64_r_ccu_desc,
262 	},
263 	{ }
264 };
265 
266 static struct platform_driver sun8i_r_ccu_driver = {
267 	.probe	= sun8i_r_ccu_probe,
268 	.driver	= {
269 		.name			= "sun8i-r-ccu",
270 		.suppress_bind_attrs	= true,
271 		.of_match_table		= sun8i_r_ccu_ids,
272 	},
273 };
274 module_platform_driver(sun8i_r_ccu_driver);
275 
276 MODULE_IMPORT_NS(SUNXI_CCU);
277 MODULE_LICENSE("GPL");
278