treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / mfd / sun6i-prcm.c
blobc31927d4bbbecdecd68cd1702f20c4a4cf6af2f9
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (C) 2014 Free Electrons
5 * Author: Boris BREZILLON <boris.brezillon@free-electrons.com>
7 * Allwinner PRCM (Power/Reset/Clock Management) driver
8 */
10 #include <linux/mfd/core.h>
11 #include <linux/init.h>
12 #include <linux/of.h>
14 #define SUN8I_CODEC_ANALOG_BASE 0x1c0
15 #define SUN8I_CODEC_ANALOG_SIZE 0x4
17 struct prcm_data {
18 int nsubdevs;
19 const struct mfd_cell *subdevs;
22 static const struct resource sun6i_a31_ar100_clk_res[] = {
24 .start = 0x0,
25 .end = 0x3,
26 .flags = IORESOURCE_MEM,
30 static const struct resource sun6i_a31_apb0_clk_res[] = {
32 .start = 0xc,
33 .end = 0xf,
34 .flags = IORESOURCE_MEM,
38 static const struct resource sun6i_a31_apb0_gates_clk_res[] = {
40 .start = 0x28,
41 .end = 0x2b,
42 .flags = IORESOURCE_MEM,
46 static const struct resource sun6i_a31_ir_clk_res[] = {
48 .start = 0x54,
49 .end = 0x57,
50 .flags = IORESOURCE_MEM,
54 static const struct resource sun6i_a31_apb0_rstc_res[] = {
56 .start = 0xb0,
57 .end = 0xb3,
58 .flags = IORESOURCE_MEM,
62 static const struct resource sun8i_codec_analog_res[] = {
63 DEFINE_RES_MEM(SUN8I_CODEC_ANALOG_BASE, SUN8I_CODEC_ANALOG_SIZE),
66 static const struct mfd_cell sun6i_a31_prcm_subdevs[] = {
68 .name = "sun6i-a31-ar100-clk",
69 .of_compatible = "allwinner,sun6i-a31-ar100-clk",
70 .num_resources = ARRAY_SIZE(sun6i_a31_ar100_clk_res),
71 .resources = sun6i_a31_ar100_clk_res,
74 .name = "sun6i-a31-apb0-clk",
75 .of_compatible = "allwinner,sun6i-a31-apb0-clk",
76 .num_resources = ARRAY_SIZE(sun6i_a31_apb0_clk_res),
77 .resources = sun6i_a31_apb0_clk_res,
80 .name = "sun6i-a31-apb0-gates-clk",
81 .of_compatible = "allwinner,sun6i-a31-apb0-gates-clk",
82 .num_resources = ARRAY_SIZE(sun6i_a31_apb0_gates_clk_res),
83 .resources = sun6i_a31_apb0_gates_clk_res,
86 .name = "sun6i-a31-ir-clk",
87 .of_compatible = "allwinner,sun4i-a10-mod0-clk",
88 .num_resources = ARRAY_SIZE(sun6i_a31_ir_clk_res),
89 .resources = sun6i_a31_ir_clk_res,
92 .name = "sun6i-a31-apb0-clock-reset",
93 .of_compatible = "allwinner,sun6i-a31-clock-reset",
94 .num_resources = ARRAY_SIZE(sun6i_a31_apb0_rstc_res),
95 .resources = sun6i_a31_apb0_rstc_res,
99 static const struct mfd_cell sun8i_a23_prcm_subdevs[] = {
101 .name = "sun8i-a23-apb0-clk",
102 .of_compatible = "allwinner,sun8i-a23-apb0-clk",
103 .num_resources = ARRAY_SIZE(sun6i_a31_apb0_clk_res),
104 .resources = sun6i_a31_apb0_clk_res,
107 .name = "sun6i-a31-apb0-gates-clk",
108 .of_compatible = "allwinner,sun8i-a23-apb0-gates-clk",
109 .num_resources = ARRAY_SIZE(sun6i_a31_apb0_gates_clk_res),
110 .resources = sun6i_a31_apb0_gates_clk_res,
113 .name = "sun6i-a31-apb0-clock-reset",
114 .of_compatible = "allwinner,sun6i-a31-clock-reset",
115 .num_resources = ARRAY_SIZE(sun6i_a31_apb0_rstc_res),
116 .resources = sun6i_a31_apb0_rstc_res,
119 .name = "sun8i-codec-analog",
120 .of_compatible = "allwinner,sun8i-a23-codec-analog",
121 .num_resources = ARRAY_SIZE(sun8i_codec_analog_res),
122 .resources = sun8i_codec_analog_res,
126 static const struct prcm_data sun6i_a31_prcm_data = {
127 .nsubdevs = ARRAY_SIZE(sun6i_a31_prcm_subdevs),
128 .subdevs = sun6i_a31_prcm_subdevs,
131 static const struct prcm_data sun8i_a23_prcm_data = {
132 .nsubdevs = ARRAY_SIZE(sun8i_a23_prcm_subdevs),
133 .subdevs = sun8i_a23_prcm_subdevs,
136 static const struct of_device_id sun6i_prcm_dt_ids[] = {
138 .compatible = "allwinner,sun6i-a31-prcm",
139 .data = &sun6i_a31_prcm_data,
142 .compatible = "allwinner,sun8i-a23-prcm",
143 .data = &sun8i_a23_prcm_data,
145 { /* sentinel */ },
148 static int sun6i_prcm_probe(struct platform_device *pdev)
150 const struct of_device_id *match;
151 const struct prcm_data *data;
152 struct resource *res;
153 int ret;
155 match = of_match_node(sun6i_prcm_dt_ids, pdev->dev.of_node);
156 if (!match)
157 return -EINVAL;
159 data = match->data;
161 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
162 if (!res) {
163 dev_err(&pdev->dev, "no prcm memory region provided\n");
164 return -ENOENT;
167 ret = mfd_add_devices(&pdev->dev, 0, data->subdevs, data->nsubdevs,
168 res, -1, NULL);
169 if (ret) {
170 dev_err(&pdev->dev, "failed to add subdevices\n");
171 return ret;
174 return 0;
177 static struct platform_driver sun6i_prcm_driver = {
178 .driver = {
179 .name = "sun6i-prcm",
180 .of_match_table = sun6i_prcm_dt_ids,
182 .probe = sun6i_prcm_probe,
184 builtin_platform_driver(sun6i_prcm_driver);