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

  /*
   * AMD ACPI support for ACPI2platform device.
   *
   * Copyright (c) 2014,2015 AMD Corporation.
   * Authors: Ken Xue <Ken.Xue@amd.com>
   *	Wu, Jeff <Jeff.Wu@amd.com>

   */
  
  #include <linux/clk-provider.h>

  #include <linux/platform_data/clk-st.h>

  #include <linux/platform_device.h>
  #include <linux/pm_domain.h>
  #include <linux/clkdev.h>
  #include <linux/acpi.h>
  #include <linux/err.h>

  #include <linux/io.h>

  #include <linux/pm.h>
  
  #include "internal.h"
  
  ACPI_MODULE_NAME("acpi_apd");
  struct apd_private_data;
  
  /**
   * ACPI_APD_SYSFS : add device attributes in sysfs
   * ACPI_APD_PM : attach power domain to device
   */
  #define ACPI_APD_SYSFS	BIT(0)
  #define ACPI_APD_PM	BIT(1)
  
  /**
   * struct apd_device_desc - a descriptor for apd device
   * @flags: device flags like %ACPI_APD_SYSFS, %ACPI_APD_PM
   * @fixed_clk_rate: fixed rate input clock source for acpi device;
   *			0 means no fixed rate input clock source
   * @setup: a hook routine to set device resource during create platform device
   *
   * Device description defined as acpi_device_id.driver_data
   */
  struct apd_device_desc {
  	unsigned int flags;
  	unsigned int fixed_clk_rate;

  	struct property_entry *properties;

  	int (*setup)(struct apd_private_data *pdata);
  };
  
  struct apd_private_data {
  	struct clk *clk;
  	struct acpi_device *adev;
  	const struct apd_device_desc *dev_desc;
  };

  #if defined(CONFIG_X86_AMD_PLATFORM_DEVICE) || defined(CONFIG_ARM64)

  #define APD_ADDR(desc)	((unsigned long)&desc)
  
  static int acpi_apd_setup(struct apd_private_data *pdata)
  {
  	const struct apd_device_desc *dev_desc = pdata->dev_desc;

  	struct clk *clk;

  
  	if (dev_desc->fixed_clk_rate) {
  		clk = clk_register_fixed_rate(&pdata->adev->dev,
  					dev_name(&pdata->adev->dev),

  					NULL, 0, dev_desc->fixed_clk_rate);

  		clk_register_clkdev(clk, NULL, dev_name(&pdata->adev->dev));
  		pdata->clk = clk;
  	}
  
  	return 0;
  }

  #ifdef CONFIG_X86_AMD_PLATFORM_DEVICE

  
  static int misc_check_res(struct acpi_resource *ares, void *data)
  {
  	struct resource res;
  
  	return !acpi_dev_resource_memory(ares, &res);
  }
  
  static int st_misc_setup(struct apd_private_data *pdata)
  {
  	struct acpi_device *adev = pdata->adev;
  	struct platform_device *clkdev;
  	struct st_clk_data *clk_data;
  	struct resource_entry *rentry;
  	struct list_head resource_list;
  	int ret;
  
  	clk_data = devm_kzalloc(&adev->dev, sizeof(*clk_data), GFP_KERNEL);
  	if (!clk_data)
  		return -ENOMEM;
  
  	INIT_LIST_HEAD(&resource_list);
  	ret = acpi_dev_get_resources(adev, &resource_list, misc_check_res,
  				     NULL);
  	if (ret < 0)
  		return -ENOENT;
  
  	list_for_each_entry(rentry, &resource_list, node) {
  		clk_data->base = devm_ioremap(&adev->dev, rentry->res->start,
  					      resource_size(rentry->res));
  		break;
  	}
  
  	acpi_dev_free_resource_list(&resource_list);
  
  	clkdev = platform_device_register_data(&adev->dev, "clk-st",
  					       PLATFORM_DEVID_NONE, clk_data,
  					       sizeof(*clk_data));
  	return PTR_ERR_OR_ZERO(clkdev);
  }

  static const struct apd_device_desc cz_i2c_desc = {

  	.setup = acpi_apd_setup,
  	.fixed_clk_rate = 133000000,
  };

  static const struct apd_device_desc wt_i2c_desc = {
  	.setup = acpi_apd_setup,
  	.fixed_clk_rate = 150000000,
  };

  static struct property_entry uart_properties[] = {
  	PROPERTY_ENTRY_U32("reg-io-width", 4),
  	PROPERTY_ENTRY_U32("reg-shift", 2),
  	PROPERTY_ENTRY_BOOL("snps,uart-16550-compatible"),
  	{ },
  };

  static const struct apd_device_desc cz_uart_desc = {

  	.setup = acpi_apd_setup,
  	.fixed_clk_rate = 48000000,

  	.properties = uart_properties,

  };

  
  static const struct apd_device_desc st_misc_desc = {
  	.setup = st_misc_setup,
  };

  #endif
  
  #ifdef CONFIG_ARM64

  static const struct apd_device_desc xgene_i2c_desc = {

  	.setup = acpi_apd_setup,
  	.fixed_clk_rate = 100000000,
  };

  static const struct apd_device_desc vulcan_spi_desc = {

  	.setup = acpi_apd_setup,
  	.fixed_clk_rate = 133000000,
  };

  
  static const struct apd_device_desc hip07_i2c_desc = {
  	.setup = acpi_apd_setup,
  	.fixed_clk_rate = 200000000,
  };
  
  static const struct apd_device_desc hip08_i2c_desc = {
  	.setup = acpi_apd_setup,
  	.fixed_clk_rate = 250000000,
  };

  static const struct apd_device_desc hip08_lite_i2c_desc = {
  	.setup = acpi_apd_setup,
  	.fixed_clk_rate = 125000000,
  };

  static const struct apd_device_desc thunderx2_i2c_desc = {
  	.setup = acpi_apd_setup,
  	.fixed_clk_rate = 125000000,
  };

  static const struct apd_device_desc nxp_i2c_desc = {
  	.setup = acpi_apd_setup,
  	.fixed_clk_rate = 350000000,
  };

  static const struct apd_device_desc hip08_spi_desc = {
  	.setup = acpi_apd_setup,
  	.fixed_clk_rate = 250000000,
  };

  #endif

  
  #else
  
  #define APD_ADDR(desc) (0UL)
  
  #endif /* CONFIG_X86_AMD_PLATFORM_DEVICE */
  
  /**
  * Create platform device during acpi scan attach handle.
  * Return value > 0 on success of creating device.
  */
  static int acpi_apd_create_device(struct acpi_device *adev,
  				   const struct acpi_device_id *id)
  {
  	const struct apd_device_desc *dev_desc = (void *)id->driver_data;
  	struct apd_private_data *pdata;
  	struct platform_device *pdev;
  	int ret;
  
  	if (!dev_desc) {

  		pdev = acpi_create_platform_device(adev, NULL);

  		return IS_ERR_OR_NULL(pdev) ? PTR_ERR(pdev) : 1;
  	}
  
  	pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
  	if (!pdata)
  		return -ENOMEM;
  
  	pdata->adev = adev;
  	pdata->dev_desc = dev_desc;
  
  	if (dev_desc->setup) {
  		ret = dev_desc->setup(pdata);
  		if (ret)
  			goto err_out;
  	}
  
  	adev->driver_data = pdata;

  	pdev = acpi_create_platform_device(adev, dev_desc->properties);

  	if (!IS_ERR_OR_NULL(pdev))
  		return 1;
  
  	ret = PTR_ERR(pdev);
  	adev->driver_data = NULL;
  
   err_out:
  	kfree(pdata);
  	return ret;
  }
  
  static const struct acpi_device_id acpi_apd_device_ids[] = {
  	/* Generic apd devices */

  #ifdef CONFIG_X86_AMD_PLATFORM_DEVICE

  	{ "AMD0010", APD_ADDR(cz_i2c_desc) },

  	{ "AMDI0010", APD_ADDR(wt_i2c_desc) },

  	{ "AMD0020", APD_ADDR(cz_uart_desc) },

  	{ "AMDI0020", APD_ADDR(cz_uart_desc) },

  	{ "AMD0030", },

  	{ "AMD0040", APD_ADDR(st_misc_desc)},

  #endif
  #ifdef CONFIG_ARM64
  	{ "APMC0D0F", APD_ADDR(xgene_i2c_desc) },

  	{ "BRCM900D", APD_ADDR(vulcan_spi_desc) },

  	{ "CAV900D",  APD_ADDR(vulcan_spi_desc) },

  	{ "CAV9007",  APD_ADDR(thunderx2_i2c_desc) },

  	{ "HISI02A1", APD_ADDR(hip07_i2c_desc) },
  	{ "HISI02A2", APD_ADDR(hip08_i2c_desc) },

  	{ "HISI02A3", APD_ADDR(hip08_lite_i2c_desc) },

  	{ "HISI0173", APD_ADDR(hip08_spi_desc) },

  	{ "NXP0001", APD_ADDR(nxp_i2c_desc) },

  #endif

  	{ }
  };
  
  static struct acpi_scan_handler apd_handler = {
  	.ids = acpi_apd_device_ids,
  	.attach = acpi_apd_create_device,
  };
  
  void __init acpi_apd_init(void)
  {
  	acpi_scan_add_handler(&apd_handler);
  }