cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

sun6i-prcm.c (4215B)

      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);