2 * Copyright (C) 2014 Free Electrons
4 * License Terms: GNU General Public License v2
5 * Author: Boris BREZILLON <boris.brezillon@free-electrons.com>
7 * Allwinner PRCM (Power/Reset/Clock Management) driver
11 #include <linux/mfd/core.h>
12 #include <linux/module.h>
17 const struct mfd_cell *subdevs;
20 static const struct resource sun6i_a31_ar100_clk_res[] = {
24 .flags = IORESOURCE_MEM,
28 static const struct resource sun6i_a31_apb0_clk_res[] = {
32 .flags = IORESOURCE_MEM,
36 static const struct resource sun6i_a31_apb0_gates_clk_res[] = {
40 .flags = IORESOURCE_MEM,
44 static const struct resource sun6i_a31_apb0_rstc_res[] = {
48 .flags = IORESOURCE_MEM,
52 static const struct mfd_cell sun6i_a31_prcm_subdevs[] = {
54 .name = "sun6i-a31-ar100-clk",
55 .of_compatible = "allwinner,sun6i-a31-ar100-clk",
56 .num_resources = ARRAY_SIZE(sun6i_a31_ar100_clk_res),
57 .resources = sun6i_a31_ar100_clk_res,
60 .name = "sun6i-a31-apb0-clk",
61 .of_compatible = "allwinner,sun6i-a31-apb0-clk",
62 .num_resources = ARRAY_SIZE(sun6i_a31_apb0_clk_res),
63 .resources = sun6i_a31_apb0_clk_res,
66 .name = "sun6i-a31-apb0-gates-clk",
67 .of_compatible = "allwinner,sun6i-a31-apb0-gates-clk",
68 .num_resources = ARRAY_SIZE(sun6i_a31_apb0_gates_clk_res),
69 .resources = sun6i_a31_apb0_gates_clk_res,
72 .name = "sun6i-a31-apb0-clock-reset",
73 .of_compatible = "allwinner,sun6i-a31-clock-reset",
74 .num_resources = ARRAY_SIZE(sun6i_a31_apb0_rstc_res),
75 .resources = sun6i_a31_apb0_rstc_res,
79 static const struct mfd_cell sun8i_a23_prcm_subdevs[] = {
81 .name = "sun8i-a23-apb0-clk",
82 .of_compatible = "allwinner,sun8i-a23-apb0-clk",
83 .num_resources = ARRAY_SIZE(sun6i_a31_apb0_clk_res),
84 .resources = sun6i_a31_apb0_clk_res,
87 .name = "sun6i-a31-apb0-gates-clk",
88 .of_compatible = "allwinner,sun8i-a23-apb0-gates-clk",
89 .num_resources = ARRAY_SIZE(sun6i_a31_apb0_gates_clk_res),
90 .resources = sun6i_a31_apb0_gates_clk_res,
93 .name = "sun6i-a31-apb0-clock-reset",
94 .of_compatible = "allwinner,sun6i-a31-clock-reset",
95 .num_resources = ARRAY_SIZE(sun6i_a31_apb0_rstc_res),
96 .resources = sun6i_a31_apb0_rstc_res,
100 static const struct prcm_data sun6i_a31_prcm_data = {
101 .nsubdevs = ARRAY_SIZE(sun6i_a31_prcm_subdevs),
102 .subdevs = sun6i_a31_prcm_subdevs,
105 static const struct prcm_data sun8i_a23_prcm_data = {
106 .nsubdevs = ARRAY_SIZE(sun8i_a23_prcm_subdevs),
107 .subdevs = sun8i_a23_prcm_subdevs,
110 static const struct of_device_id sun6i_prcm_dt_ids[] = {
112 .compatible = "allwinner,sun6i-a31-prcm",
113 .data = &sun6i_a31_prcm_data,
116 .compatible = "allwinner,sun8i-a23-prcm",
117 .data = &sun8i_a23_prcm_data,
122 static int sun6i_prcm_probe(struct platform_device *pdev)
124 struct device_node *np = pdev->dev.of_node;
125 const struct of_device_id *match;
126 const struct prcm_data *data;
127 struct resource *res;
130 match = of_match_node(sun6i_prcm_dt_ids, np);
136 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
138 dev_err(&pdev->dev, "no prcm memory region provided\n");
142 ret = mfd_add_devices(&pdev->dev, 0, data->subdevs, data->nsubdevs,
145 dev_err(&pdev->dev, "failed to add subdevices\n");
152 static struct platform_driver sun6i_prcm_driver = {
154 .name = "sun6i-prcm",
155 .owner = THIS_MODULE,
156 .of_match_table = sun6i_prcm_dt_ids,
158 .probe = sun6i_prcm_probe,
160 module_platform_driver(sun6i_prcm_driver);
162 MODULE_AUTHOR("Boris BREZILLON <boris.brezillon@free-electrons.com>");
163 MODULE_DESCRIPTION("Allwinner sun6i PRCM driver");
164 MODULE_LICENSE("GPL v2");