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- // SPDX-License-Identifier: GPL-2.0-only
- /*
- * AMD ACPI support for ACPI2platform device.
- *
- * Copyright (c) 2014,2015 AMD Corporation.
- * Authors: Ken Xue <[email protected]>
- * Wu, Jeff <[email protected]>
- */
- #include <linux/acpi.h>
- #include <linux/clkdev.h>
- #include <linux/clk-provider.h>
- #include <linux/err.h>
- #include <linux/io.h>
- #include <linux/platform_data/clk-fch.h>
- #include <linux/platform_device.h>
- #include "internal.h"
- struct apd_private_data;
- /**
- * struct apd_device_desc - a descriptor for apd device
- * @fixed_clk_rate: fixed rate input clock source for acpi device;
- * 0 means no fixed rate input clock source
- * @properties: build-in properties of the device such as UART
- * @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 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 fch_misc_setup(struct apd_private_data *pdata)
- {
- struct acpi_device *adev = pdata->adev;
- const union acpi_object *obj;
- struct platform_device *clkdev;
- struct fch_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_memory_resources(adev, &resource_list);
- if (ret < 0)
- return -ENOENT;
- if (!acpi_dev_get_property(adev, "clk-name", ACPI_TYPE_STRING, &obj)) {
- clk_data->name = devm_kzalloc(&adev->dev, obj->string.length,
- GFP_KERNEL);
- if (!clk_data->name)
- return -ENOMEM;
- strcpy(clk_data->name, obj->string.pointer);
- } else {
- /* Set default name to mclk if entry missing in firmware */
- clk_data->name = "mclk";
- }
- list_for_each_entry(rentry, &resource_list, node) {
- clk_data->base = devm_ioremap(&adev->dev, rentry->res->start,
- resource_size(rentry->res));
- break;
- }
- if (!clk_data->base)
- return -ENOMEM;
- acpi_dev_free_resource_list(&resource_list);
- clkdev = platform_device_register_data(&adev->dev, "clk-fch",
- 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 fch_misc_desc = {
- .setup = fch_misc_setup,
- };
- #endif /* CONFIG_X86_AMD_PLATFORM_DEVICE */
- #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 /* CONFIG_ARM64 */
- #endif
- /*
- * 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) },
- { "AMD0020", APD_ADDR(cz_uart_desc) },
- { "AMD0030", },
- { "AMD0040", APD_ADDR(fch_misc_desc)},
- { "AMDI0010", APD_ADDR(wt_i2c_desc) },
- { "AMDI0019", APD_ADDR(wt_i2c_desc) },
- { "AMDI0020", APD_ADDR(cz_uart_desc) },
- { "AMDI0022", APD_ADDR(cz_uart_desc) },
- { "HYGO0010", APD_ADDR(wt_i2c_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);
- }
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