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 prcm_data sun6i_a31_prcm_data = {
80 .nsubdevs = ARRAY_SIZE(sun6i_a31_prcm_subdevs),
81 .subdevs = sun6i_a31_prcm_subdevs,
84 static const struct of_device_id sun6i_prcm_dt_ids[] = {
86 .compatible = "allwinner,sun6i-a31-prcm",
87 .data = &sun6i_a31_prcm_data,
92 static int sun6i_prcm_probe(struct platform_device *pdev)
94 struct device_node *np = pdev->dev.of_node;
95 const struct of_device_id *match;
96 const struct prcm_data *data;
100 match = of_match_node(sun6i_prcm_dt_ids, np);
106 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
108 dev_err(&pdev->dev, "no prcm memory region provided\n");
112 ret = mfd_add_devices(&pdev->dev, 0, data->subdevs, data->nsubdevs,
115 dev_err(&pdev->dev, "failed to add subdevices\n");
122 static struct platform_driver sun6i_prcm_driver = {
124 .name = "sun6i-prcm",
125 .owner = THIS_MODULE,
126 .of_match_table = sun6i_prcm_dt_ids,
128 .probe = sun6i_prcm_probe,
130 module_platform_driver(sun6i_prcm_driver);
132 MODULE_AUTHOR("Boris BREZILLON <boris.brezillon@free-electrons.com>");
133 MODULE_DESCRIPTION("Allwinner sun6i PRCM driver");
134 MODULE_LICENSE("GPL v2");