// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2014 Free Electrons
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*
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* Author: Boris BREZILLON <boris.brezillon@free-electrons.com>
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*
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* Allwinner PRCM (Power/Reset/Clock Management) driver
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*/
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#include <linux/mfd/core.h>
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#include <linux/init.h>
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#include <linux/of.h>
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#define SUN8I_CODEC_ANALOG_BASE 0x1c0
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#define SUN8I_CODEC_ANALOG_SIZE 0x4
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struct prcm_data {
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int nsubdevs;
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const struct mfd_cell *subdevs;
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};
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static const struct resource sun6i_a31_ar100_clk_res[] = {
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{
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.start = 0x0,
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.end = 0x3,
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.flags = IORESOURCE_MEM,
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},
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};
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static const struct resource sun6i_a31_apb0_clk_res[] = {
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{
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.start = 0xc,
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.end = 0xf,
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.flags = IORESOURCE_MEM,
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},
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};
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static const struct resource sun6i_a31_apb0_gates_clk_res[] = {
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{
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.start = 0x28,
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.end = 0x2b,
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.flags = IORESOURCE_MEM,
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},
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};
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static const struct resource sun6i_a31_ir_clk_res[] = {
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{
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.start = 0x54,
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.end = 0x57,
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.flags = IORESOURCE_MEM,
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},
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};
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static const struct resource sun6i_a31_apb0_rstc_res[] = {
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{
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.start = 0xb0,
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.end = 0xb3,
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.flags = IORESOURCE_MEM,
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},
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};
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static const struct resource sun8i_codec_analog_res[] = {
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DEFINE_RES_MEM(SUN8I_CODEC_ANALOG_BASE, SUN8I_CODEC_ANALOG_SIZE),
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};
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static const struct mfd_cell sun6i_a31_prcm_subdevs[] = {
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{
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.name = "sun6i-a31-ar100-clk",
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.of_compatible = "allwinner,sun6i-a31-ar100-clk",
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.num_resources = ARRAY_SIZE(sun6i_a31_ar100_clk_res),
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.resources = sun6i_a31_ar100_clk_res,
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},
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{
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.name = "sun6i-a31-apb0-clk",
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.of_compatible = "allwinner,sun6i-a31-apb0-clk",
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.num_resources = ARRAY_SIZE(sun6i_a31_apb0_clk_res),
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.resources = sun6i_a31_apb0_clk_res,
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},
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{
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.name = "sun6i-a31-apb0-gates-clk",
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.of_compatible = "allwinner,sun6i-a31-apb0-gates-clk",
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.num_resources = ARRAY_SIZE(sun6i_a31_apb0_gates_clk_res),
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.resources = sun6i_a31_apb0_gates_clk_res,
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},
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{
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.name = "sun6i-a31-ir-clk",
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.of_compatible = "allwinner,sun4i-a10-mod0-clk",
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.num_resources = ARRAY_SIZE(sun6i_a31_ir_clk_res),
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.resources = sun6i_a31_ir_clk_res,
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},
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{
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.name = "sun6i-a31-apb0-clock-reset",
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.of_compatible = "allwinner,sun6i-a31-clock-reset",
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.num_resources = ARRAY_SIZE(sun6i_a31_apb0_rstc_res),
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.resources = sun6i_a31_apb0_rstc_res,
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},
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};
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static const struct mfd_cell sun8i_a23_prcm_subdevs[] = {
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{
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.name = "sun8i-a23-apb0-clk",
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.of_compatible = "allwinner,sun8i-a23-apb0-clk",
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.num_resources = ARRAY_SIZE(sun6i_a31_apb0_clk_res),
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.resources = sun6i_a31_apb0_clk_res,
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},
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{
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.name = "sun6i-a31-apb0-gates-clk",
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.of_compatible = "allwinner,sun8i-a23-apb0-gates-clk",
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.num_resources = ARRAY_SIZE(sun6i_a31_apb0_gates_clk_res),
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.resources = sun6i_a31_apb0_gates_clk_res,
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},
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{
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.name = "sun6i-a31-apb0-clock-reset",
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.of_compatible = "allwinner,sun6i-a31-clock-reset",
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.num_resources = ARRAY_SIZE(sun6i_a31_apb0_rstc_res),
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.resources = sun6i_a31_apb0_rstc_res,
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},
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{
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.name = "sun8i-codec-analog",
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.of_compatible = "allwinner,sun8i-a23-codec-analog",
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.num_resources = ARRAY_SIZE(sun8i_codec_analog_res),
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.resources = sun8i_codec_analog_res,
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},
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};
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static const struct prcm_data sun6i_a31_prcm_data = {
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.nsubdevs = ARRAY_SIZE(sun6i_a31_prcm_subdevs),
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.subdevs = sun6i_a31_prcm_subdevs,
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};
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static const struct prcm_data sun8i_a23_prcm_data = {
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.nsubdevs = ARRAY_SIZE(sun8i_a23_prcm_subdevs),
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.subdevs = sun8i_a23_prcm_subdevs,
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};
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static const struct of_device_id sun6i_prcm_dt_ids[] = {
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{
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.compatible = "allwinner,sun6i-a31-prcm",
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.data = &sun6i_a31_prcm_data,
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},
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{
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.compatible = "allwinner,sun8i-a23-prcm",
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.data = &sun8i_a23_prcm_data,
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},
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{ /* sentinel */ },
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};
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static int sun6i_prcm_probe(struct platform_device *pdev)
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{
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const struct of_device_id *match;
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const struct prcm_data *data;
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struct resource *res;
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int ret;
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match = of_match_node(sun6i_prcm_dt_ids, pdev->dev.of_node);
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if (!match)
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return -EINVAL;
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data = match->data;
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!res) {
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dev_err(&pdev->dev, "no prcm memory region provided\n");
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return -ENOENT;
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}
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ret = mfd_add_devices(&pdev->dev, 0, data->subdevs, data->nsubdevs,
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res, -1, NULL);
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if (ret) {
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dev_err(&pdev->dev, "failed to add subdevices\n");
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return ret;
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}
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return 0;
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}
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static struct platform_driver sun6i_prcm_driver = {
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.driver = {
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.name = "sun6i-prcm",
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.of_match_table = sun6i_prcm_dt_ids,
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},
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.probe = sun6i_prcm_probe,
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};
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builtin_platform_driver(sun6i_prcm_driver);
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