1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (c) 2016 Chen-Yu Tsai. All rights reserved.
7 #include <linux/clk-provider.h>
8 #include <linux/of_address.h>
9 #include <linux/platform_device.h>
10 #include <linux/reset.h>
12 #include "ccu_common.h"
15 #include "ccu_reset.h"
17 #include "ccu-sun9i-a80-de.h"
19 static SUNXI_CCU_GATE(fe0_clk, "fe0", "fe0-div",
21 static SUNXI_CCU_GATE(fe1_clk, "fe1", "fe1-div",
23 static SUNXI_CCU_GATE(fe2_clk, "fe2", "fe2-div",
25 static SUNXI_CCU_GATE(iep_deu0_clk, "iep-deu0", "de",
27 static SUNXI_CCU_GATE(iep_deu1_clk, "iep-deu1", "de",
29 static SUNXI_CCU_GATE(be0_clk, "be0", "be0-div",
31 static SUNXI_CCU_GATE(be1_clk, "be1", "be1-div",
33 static SUNXI_CCU_GATE(be2_clk, "be2", "be2-div",
35 static SUNXI_CCU_GATE(iep_drc0_clk, "iep-drc0", "de",
37 static SUNXI_CCU_GATE(iep_drc1_clk, "iep-drc1", "de",
39 static SUNXI_CCU_GATE(merge_clk, "merge", "de",
42 static SUNXI_CCU_GATE(dram_fe0_clk, "dram-fe0", "sdram",
44 static SUNXI_CCU_GATE(dram_fe1_clk, "dram-fe1", "sdram",
46 static SUNXI_CCU_GATE(dram_fe2_clk, "dram-fe2", "sdram",
48 static SUNXI_CCU_GATE(dram_deu0_clk, "dram-deu0", "sdram",
50 static SUNXI_CCU_GATE(dram_deu1_clk, "dram-deu1", "sdram",
52 static SUNXI_CCU_GATE(dram_be0_clk, "dram-be0", "sdram",
54 static SUNXI_CCU_GATE(dram_be1_clk, "dram-be1", "sdram",
56 static SUNXI_CCU_GATE(dram_be2_clk, "dram-be2", "sdram",
58 static SUNXI_CCU_GATE(dram_drc0_clk, "dram-drc0", "sdram",
60 static SUNXI_CCU_GATE(dram_drc1_clk, "dram-drc1", "sdram",
63 static SUNXI_CCU_GATE(bus_fe0_clk, "bus-fe0", "bus-de",
65 static SUNXI_CCU_GATE(bus_fe1_clk, "bus-fe1", "bus-de",
67 static SUNXI_CCU_GATE(bus_fe2_clk, "bus-fe2", "bus-de",
69 static SUNXI_CCU_GATE(bus_deu0_clk, "bus-deu0", "bus-de",
71 static SUNXI_CCU_GATE(bus_deu1_clk, "bus-deu1", "bus-de",
73 static SUNXI_CCU_GATE(bus_be0_clk, "bus-be0", "bus-de",
75 static SUNXI_CCU_GATE(bus_be1_clk, "bus-be1", "bus-de",
77 static SUNXI_CCU_GATE(bus_be2_clk, "bus-be2", "bus-de",
79 static SUNXI_CCU_GATE(bus_drc0_clk, "bus-drc0", "bus-de",
81 static SUNXI_CCU_GATE(bus_drc1_clk, "bus-drc1", "bus-de",
84 static SUNXI_CCU_M(fe0_div_clk, "fe0-div", "de", 0x20, 0, 4, 0);
85 static SUNXI_CCU_M(fe1_div_clk, "fe1-div", "de", 0x20, 4, 4, 0);
86 static SUNXI_CCU_M(fe2_div_clk, "fe2-div", "de", 0x20, 8, 4, 0);
87 static SUNXI_CCU_M(be0_div_clk, "be0-div", "de", 0x20, 16, 4, 0);
88 static SUNXI_CCU_M(be1_div_clk, "be1-div", "de", 0x20, 20, 4, 0);
89 static SUNXI_CCU_M(be2_div_clk, "be2-div", "de", 0x20, 24, 4, 0);
91 static struct ccu_common *sun9i_a80_de_clks[] = {
100 &iep_drc0_clk.common,
101 &iep_drc1_clk.common,
104 &dram_fe0_clk.common,
105 &dram_fe1_clk.common,
106 &dram_fe2_clk.common,
107 &dram_deu0_clk.common,
108 &dram_deu1_clk.common,
109 &dram_be0_clk.common,
110 &dram_be1_clk.common,
111 &dram_be2_clk.common,
112 &dram_drc0_clk.common,
113 &dram_drc1_clk.common,
118 &bus_deu0_clk.common,
119 &bus_deu1_clk.common,
123 &bus_drc0_clk.common,
124 &bus_drc1_clk.common,
134 static struct clk_hw_onecell_data sun9i_a80_de_hw_clks = {
136 [CLK_FE0] = &fe0_clk.common.hw,
137 [CLK_FE1] = &fe1_clk.common.hw,
138 [CLK_FE2] = &fe2_clk.common.hw,
139 [CLK_IEP_DEU0] = &iep_deu0_clk.common.hw,
140 [CLK_IEP_DEU1] = &iep_deu1_clk.common.hw,
141 [CLK_BE0] = &be0_clk.common.hw,
142 [CLK_BE1] = &be1_clk.common.hw,
143 [CLK_BE2] = &be2_clk.common.hw,
144 [CLK_IEP_DRC0] = &iep_drc0_clk.common.hw,
145 [CLK_IEP_DRC1] = &iep_drc1_clk.common.hw,
146 [CLK_MERGE] = &merge_clk.common.hw,
148 [CLK_DRAM_FE0] = &dram_fe0_clk.common.hw,
149 [CLK_DRAM_FE1] = &dram_fe1_clk.common.hw,
150 [CLK_DRAM_FE2] = &dram_fe2_clk.common.hw,
151 [CLK_DRAM_DEU0] = &dram_deu0_clk.common.hw,
152 [CLK_DRAM_DEU1] = &dram_deu1_clk.common.hw,
153 [CLK_DRAM_BE0] = &dram_be0_clk.common.hw,
154 [CLK_DRAM_BE1] = &dram_be1_clk.common.hw,
155 [CLK_DRAM_BE2] = &dram_be2_clk.common.hw,
156 [CLK_DRAM_DRC0] = &dram_drc0_clk.common.hw,
157 [CLK_DRAM_DRC1] = &dram_drc1_clk.common.hw,
159 [CLK_BUS_FE0] = &bus_fe0_clk.common.hw,
160 [CLK_BUS_FE1] = &bus_fe1_clk.common.hw,
161 [CLK_BUS_FE2] = &bus_fe2_clk.common.hw,
162 [CLK_BUS_DEU0] = &bus_deu0_clk.common.hw,
163 [CLK_BUS_DEU1] = &bus_deu1_clk.common.hw,
164 [CLK_BUS_BE0] = &bus_be0_clk.common.hw,
165 [CLK_BUS_BE1] = &bus_be1_clk.common.hw,
166 [CLK_BUS_BE2] = &bus_be2_clk.common.hw,
167 [CLK_BUS_DRC0] = &bus_drc0_clk.common.hw,
168 [CLK_BUS_DRC1] = &bus_drc1_clk.common.hw,
170 [CLK_FE0_DIV] = &fe0_div_clk.common.hw,
171 [CLK_FE1_DIV] = &fe1_div_clk.common.hw,
172 [CLK_FE2_DIV] = &fe2_div_clk.common.hw,
173 [CLK_BE0_DIV] = &be0_div_clk.common.hw,
174 [CLK_BE1_DIV] = &be1_div_clk.common.hw,
175 [CLK_BE2_DIV] = &be2_div_clk.common.hw,
180 static struct ccu_reset_map sun9i_a80_de_resets[] = {
181 [RST_FE0] = { 0x0c, BIT(0) },
182 [RST_FE1] = { 0x0c, BIT(1) },
183 [RST_FE2] = { 0x0c, BIT(2) },
184 [RST_DEU0] = { 0x0c, BIT(4) },
185 [RST_DEU1] = { 0x0c, BIT(5) },
186 [RST_BE0] = { 0x0c, BIT(8) },
187 [RST_BE1] = { 0x0c, BIT(9) },
188 [RST_BE2] = { 0x0c, BIT(10) },
189 [RST_DRC0] = { 0x0c, BIT(12) },
190 [RST_DRC1] = { 0x0c, BIT(13) },
191 [RST_MERGE] = { 0x0c, BIT(20) },
194 static const struct sunxi_ccu_desc sun9i_a80_de_clk_desc = {
195 .ccu_clks = sun9i_a80_de_clks,
196 .num_ccu_clks = ARRAY_SIZE(sun9i_a80_de_clks),
198 .hw_clks = &sun9i_a80_de_hw_clks,
200 .resets = sun9i_a80_de_resets,
201 .num_resets = ARRAY_SIZE(sun9i_a80_de_resets),
204 static int sun9i_a80_de_clk_probe(struct platform_device *pdev)
206 struct resource *res;
208 struct reset_control *rstc;
212 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
213 reg = devm_ioremap_resource(&pdev->dev, res);
217 bus_clk = devm_clk_get(&pdev->dev, "bus");
218 if (IS_ERR(bus_clk)) {
219 ret = PTR_ERR(bus_clk);
220 if (ret != -EPROBE_DEFER)
221 dev_err(&pdev->dev, "Couldn't get bus clk: %d\n", ret);
225 rstc = devm_reset_control_get_exclusive(&pdev->dev, NULL);
228 if (ret != -EPROBE_DEFER)
230 "Couldn't get reset control: %d\n", ret);
234 /* The bus clock needs to be enabled for us to access the registers */
235 ret = clk_prepare_enable(bus_clk);
237 dev_err(&pdev->dev, "Couldn't enable bus clk: %d\n", ret);
241 /* The reset control needs to be asserted for the controls to work */
242 ret = reset_control_deassert(rstc);
245 "Couldn't deassert reset control: %d\n", ret);
246 goto err_disable_clk;
249 ret = sunxi_ccu_probe(pdev->dev.of_node, reg,
250 &sun9i_a80_de_clk_desc);
252 goto err_assert_reset;
257 reset_control_assert(rstc);
259 clk_disable_unprepare(bus_clk);
263 static const struct of_device_id sun9i_a80_de_clk_ids[] = {
264 { .compatible = "allwinner,sun9i-a80-de-clks" },
268 static struct platform_driver sun9i_a80_de_clk_driver = {
269 .probe = sun9i_a80_de_clk_probe,
271 .name = "sun9i-a80-de-clks",
272 .of_match_table = sun9i_a80_de_clk_ids,
275 builtin_platform_driver(sun9i_a80_de_clk_driver);