// SPDX-License-Identifier: GPL-2.0-only

  /*
   * Copyright (C) 2014 Free Electrons
   *

   * Author: Boris BREZILLON <boris.brezillon@free-electrons.com>
   *
   * Allwinner PRCM (Power/Reset/Clock Management) driver

   */
  
  #include <linux/mfd/core.h>

  #include <linux/init.h>

  #include <linux/of.h>

  #define SUN8I_CODEC_ANALOG_BASE	0x1c0
  #define SUN8I_CODEC_ANALOG_SIZE	0x4

  struct prcm_data {
  	int nsubdevs;
  	const struct mfd_cell *subdevs;
  };
  
  static const struct resource sun6i_a31_ar100_clk_res[] = {
  	{
  		.start = 0x0,
  		.end = 0x3,
  		.flags = IORESOURCE_MEM,
  	},
  };
  
  static const struct resource sun6i_a31_apb0_clk_res[] = {
  	{
  		.start = 0xc,
  		.end = 0xf,
  		.flags = IORESOURCE_MEM,
  	},
  };
  
  static const struct resource sun6i_a31_apb0_gates_clk_res[] = {
  	{
  		.start = 0x28,
  		.end = 0x2b,
  		.flags = IORESOURCE_MEM,
  	},
  };

  static const struct resource sun6i_a31_ir_clk_res[] = {
  	{
  		.start = 0x54,
  		.end = 0x57,
  		.flags = IORESOURCE_MEM,
  	},
  };

  static const struct resource sun6i_a31_apb0_rstc_res[] = {
  	{
  		.start = 0xb0,
  		.end = 0xb3,
  		.flags = IORESOURCE_MEM,
  	},
  };

  static const struct resource sun8i_codec_analog_res[] = {
  	DEFINE_RES_MEM(SUN8I_CODEC_ANALOG_BASE, SUN8I_CODEC_ANALOG_SIZE),
  };

  static const struct mfd_cell sun6i_a31_prcm_subdevs[] = {
  	{
  		.name = "sun6i-a31-ar100-clk",
  		.of_compatible = "allwinner,sun6i-a31-ar100-clk",
  		.num_resources = ARRAY_SIZE(sun6i_a31_ar100_clk_res),
  		.resources = sun6i_a31_ar100_clk_res,
  	},
  	{
  		.name = "sun6i-a31-apb0-clk",
  		.of_compatible = "allwinner,sun6i-a31-apb0-clk",
  		.num_resources = ARRAY_SIZE(sun6i_a31_apb0_clk_res),
  		.resources = sun6i_a31_apb0_clk_res,
  	},
  	{
  		.name = "sun6i-a31-apb0-gates-clk",
  		.of_compatible = "allwinner,sun6i-a31-apb0-gates-clk",
  		.num_resources = ARRAY_SIZE(sun6i_a31_apb0_gates_clk_res),
  		.resources = sun6i_a31_apb0_gates_clk_res,
  	},
  	{

  		.name = "sun6i-a31-ir-clk",
  		.of_compatible = "allwinner,sun4i-a10-mod0-clk",
  		.num_resources = ARRAY_SIZE(sun6i_a31_ir_clk_res),
  		.resources = sun6i_a31_ir_clk_res,
  	},
  	{

  		.name = "sun6i-a31-apb0-clock-reset",
  		.of_compatible = "allwinner,sun6i-a31-clock-reset",
  		.num_resources = ARRAY_SIZE(sun6i_a31_apb0_rstc_res),
  		.resources = sun6i_a31_apb0_rstc_res,
  	},
  };

  static const struct mfd_cell sun8i_a23_prcm_subdevs[] = {
  	{
  		.name = "sun8i-a23-apb0-clk",
  		.of_compatible = "allwinner,sun8i-a23-apb0-clk",
  		.num_resources = ARRAY_SIZE(sun6i_a31_apb0_clk_res),
  		.resources = sun6i_a31_apb0_clk_res,
  	},
  	{
  		.name = "sun6i-a31-apb0-gates-clk",
  		.of_compatible = "allwinner,sun8i-a23-apb0-gates-clk",
  		.num_resources = ARRAY_SIZE(sun6i_a31_apb0_gates_clk_res),
  		.resources = sun6i_a31_apb0_gates_clk_res,
  	},
  	{
  		.name = "sun6i-a31-apb0-clock-reset",
  		.of_compatible = "allwinner,sun6i-a31-clock-reset",
  		.num_resources = ARRAY_SIZE(sun6i_a31_apb0_rstc_res),
  		.resources = sun6i_a31_apb0_rstc_res,
  	},

  	{
  		.name		= "sun8i-codec-analog",
  		.of_compatible	= "allwinner,sun8i-a23-codec-analog",
  		.num_resources	= ARRAY_SIZE(sun8i_codec_analog_res),
  		.resources	= sun8i_codec_analog_res,
  	},

  };

  static const struct prcm_data sun6i_a31_prcm_data = {
  	.nsubdevs = ARRAY_SIZE(sun6i_a31_prcm_subdevs),
  	.subdevs = sun6i_a31_prcm_subdevs,
  };

  static const struct prcm_data sun8i_a23_prcm_data = {
  	.nsubdevs = ARRAY_SIZE(sun8i_a23_prcm_subdevs),
  	.subdevs = sun8i_a23_prcm_subdevs,
  };

  static const struct of_device_id sun6i_prcm_dt_ids[] = {
  	{
  		.compatible = "allwinner,sun6i-a31-prcm",
  		.data = &sun6i_a31_prcm_data,
  	},

  	{
  		.compatible = "allwinner,sun8i-a23-prcm",
  		.data = &sun8i_a23_prcm_data,
  	},

  	{ /* sentinel */ },
  };
  
  static int sun6i_prcm_probe(struct platform_device *pdev)
  {

  	const struct of_device_id *match;
  	const struct prcm_data *data;
  	struct resource *res;
  	int ret;

  	match = of_match_node(sun6i_prcm_dt_ids, pdev->dev.of_node);

  	if (!match)
  		return -EINVAL;
  
  	data = match->data;
  
  	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  	if (!res) {
  		dev_err(&pdev->dev, "no prcm memory region provided
  ");
  		return -ENOENT;
  	}
  
  	ret = mfd_add_devices(&pdev->dev, 0, data->subdevs, data->nsubdevs,
  			      res, -1, NULL);
  	if (ret) {
  		dev_err(&pdev->dev, "failed to add subdevices
  ");
  		return ret;
  	}
  
  	return 0;
  }
  
  static struct platform_driver sun6i_prcm_driver = {
  	.driver = {
  		.name = "sun6i-prcm",

  		.of_match_table = sun6i_prcm_dt_ids,
  	},
  	.probe = sun6i_prcm_probe,
  };

  builtin_platform_driver(sun6i_prcm_driver);