1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 * Copyright (C) 2014 Free Electrons
  4 *
  5 * Author: Boris BREZILLON <boris.brezillon@free-electrons.com>
  6 *
  7 * Allwinner PRCM (Power/Reset/Clock Management) driver
  8 */
  9
 10#include <linux/mfd/core.h>
 11#include <linux/init.h>
 12#include <linux/of.h>
 13
 14#define SUN8I_CODEC_ANALOG_BASE	0x1c0
 15#define SUN8I_CODEC_ANALOG_SIZE	0x4
 16
 17struct prcm_data {
 18	int nsubdevs;
 19	const struct mfd_cell *subdevs;
 20};
 21
 22static const struct resource sun6i_a31_ar100_clk_res[] = {
 23	DEFINE_RES_MEM(0x0, 4)
 24};
 25
 26static const struct resource sun6i_a31_apb0_clk_res[] = {
 27	DEFINE_RES_MEM(0xc, 4)
 28};
 29
 30static const struct resource sun6i_a31_apb0_gates_clk_res[] = {
 31	DEFINE_RES_MEM(0x28, 4)
 32};
 33
 34static const struct resource sun6i_a31_ir_clk_res[] = {
 35	DEFINE_RES_MEM(0x54, 4)
 36};
 37
 38static const struct resource sun6i_a31_apb0_rstc_res[] = {
 39	DEFINE_RES_MEM(0xb0, 4)
 40};
 41
 42static const struct resource sun8i_codec_analog_res[] = {
 43	DEFINE_RES_MEM(SUN8I_CODEC_ANALOG_BASE, SUN8I_CODEC_ANALOG_SIZE),
 44};
 45
 46static const struct mfd_cell sun6i_a31_prcm_subdevs[] = {
 47	{
 48		.name = "sun6i-a31-ar100-clk",
 49		.of_compatible = "allwinner,sun6i-a31-ar100-clk",
 50		.num_resources = ARRAY_SIZE(sun6i_a31_ar100_clk_res),
 51		.resources = sun6i_a31_ar100_clk_res,
 52	},
 53	{
 54		.name = "sun6i-a31-apb0-clk",
 55		.of_compatible = "allwinner,sun6i-a31-apb0-clk",
 56		.num_resources = ARRAY_SIZE(sun6i_a31_apb0_clk_res),
 57		.resources = sun6i_a31_apb0_clk_res,
 58	},
 59	{
 60		.name = "sun6i-a31-apb0-gates-clk",
 61		.of_compatible = "allwinner,sun6i-a31-apb0-gates-clk",
 62		.num_resources = ARRAY_SIZE(sun6i_a31_apb0_gates_clk_res),
 63		.resources = sun6i_a31_apb0_gates_clk_res,
 64	},
 65	{
 66		.name = "sun6i-a31-ir-clk",
 67		.of_compatible = "allwinner,sun4i-a10-mod0-clk",
 68		.num_resources = ARRAY_SIZE(sun6i_a31_ir_clk_res),
 69		.resources = sun6i_a31_ir_clk_res,
 70	},
 71	{
 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,
 76	},
 77};
 78
 79static const struct mfd_cell sun8i_a23_prcm_subdevs[] = {
 80	{
 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,
 85	},
 86	{
 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,
 91	},
 92	{
 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,
 97	},
 98	{
 99		.name		= "sun8i-codec-analog",
100		.of_compatible	= "allwinner,sun8i-a23-codec-analog",
101		.num_resources	= ARRAY_SIZE(sun8i_codec_analog_res),
102		.resources	= sun8i_codec_analog_res,
103	},
104};
105
106static const struct prcm_data sun6i_a31_prcm_data = {
107	.nsubdevs = ARRAY_SIZE(sun6i_a31_prcm_subdevs),
108	.subdevs = sun6i_a31_prcm_subdevs,
109};
110
111static const struct prcm_data sun8i_a23_prcm_data = {
112	.nsubdevs = ARRAY_SIZE(sun8i_a23_prcm_subdevs),
113	.subdevs = sun8i_a23_prcm_subdevs,
114};
115
116static const struct of_device_id sun6i_prcm_dt_ids[] = {
117	{
118		.compatible = "allwinner,sun6i-a31-prcm",
119		.data = &sun6i_a31_prcm_data,
120	},
121	{
122		.compatible = "allwinner,sun8i-a23-prcm",
123		.data = &sun8i_a23_prcm_data,
124	},
125	{ /* sentinel */ },
126};
127
128static int sun6i_prcm_probe(struct platform_device *pdev)
129{
130	const struct of_device_id *match;
131	const struct prcm_data *data;
132	struct resource *res;
133	int ret;
134
135	match = of_match_node(sun6i_prcm_dt_ids, pdev->dev.of_node);
136	if (!match)
137		return -EINVAL;
138
139	data = match->data;
140
141	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
142	if (!res) {
143		dev_err(&pdev->dev, "no prcm memory region provided\n");
144		return -ENOENT;
145	}
146
147	ret = mfd_add_devices(&pdev->dev, 0, data->subdevs, data->nsubdevs,
148			      res, -1, NULL);
149	if (ret) {
150		dev_err(&pdev->dev, "failed to add subdevices\n");
151		return ret;
152	}
153
154	return 0;
155}
156
157static struct platform_driver sun6i_prcm_driver = {
158	.driver = {
159		.name = "sun6i-prcm",
160		.of_match_table = sun6i_prcm_dt_ids,
161	},
162	.probe = sun6i_prcm_probe,
163};
164builtin_platform_driver(sun6i_prcm_driver);