250 строки
6.0 KiB
C
250 строки
6.0 KiB
C
/*
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* AMD ACPI support for ACPI2platform device.
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*
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* Copyright (c) 2014,2015 AMD Corporation.
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* Authors: Ken Xue <Ken.Xue@amd.com>
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* Wu, Jeff <Jeff.Wu@amd.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/clk-provider.h>
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#include <linux/platform_data/clk-st.h>
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#include <linux/platform_device.h>
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#include <linux/pm_domain.h>
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#include <linux/clkdev.h>
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#include <linux/acpi.h>
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#include <linux/err.h>
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#include <linux/pm.h>
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#include "internal.h"
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ACPI_MODULE_NAME("acpi_apd");
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struct apd_private_data;
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/**
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* ACPI_APD_SYSFS : add device attributes in sysfs
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* ACPI_APD_PM : attach power domain to device
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*/
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#define ACPI_APD_SYSFS BIT(0)
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#define ACPI_APD_PM BIT(1)
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/**
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* struct apd_device_desc - a descriptor for apd device
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* @flags: device flags like %ACPI_APD_SYSFS, %ACPI_APD_PM
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* @fixed_clk_rate: fixed rate input clock source for acpi device;
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* 0 means no fixed rate input clock source
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* @setup: a hook routine to set device resource during create platform device
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*
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* Device description defined as acpi_device_id.driver_data
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*/
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struct apd_device_desc {
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unsigned int flags;
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unsigned int fixed_clk_rate;
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struct property_entry *properties;
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int (*setup)(struct apd_private_data *pdata);
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};
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struct apd_private_data {
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struct clk *clk;
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struct acpi_device *adev;
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const struct apd_device_desc *dev_desc;
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};
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#if defined(CONFIG_X86_AMD_PLATFORM_DEVICE) || defined(CONFIG_ARM64)
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#define APD_ADDR(desc) ((unsigned long)&desc)
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static int acpi_apd_setup(struct apd_private_data *pdata)
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{
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const struct apd_device_desc *dev_desc = pdata->dev_desc;
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struct clk *clk = ERR_PTR(-ENODEV);
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if (dev_desc->fixed_clk_rate) {
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clk = clk_register_fixed_rate(&pdata->adev->dev,
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dev_name(&pdata->adev->dev),
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NULL, 0, dev_desc->fixed_clk_rate);
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clk_register_clkdev(clk, NULL, dev_name(&pdata->adev->dev));
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pdata->clk = clk;
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}
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return 0;
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}
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#ifdef CONFIG_X86_AMD_PLATFORM_DEVICE
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static int misc_check_res(struct acpi_resource *ares, void *data)
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{
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struct resource res;
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return !acpi_dev_resource_memory(ares, &res);
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}
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static int st_misc_setup(struct apd_private_data *pdata)
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{
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struct acpi_device *adev = pdata->adev;
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struct platform_device *clkdev;
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struct st_clk_data *clk_data;
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struct resource_entry *rentry;
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struct list_head resource_list;
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int ret;
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clk_data = devm_kzalloc(&adev->dev, sizeof(*clk_data), GFP_KERNEL);
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if (!clk_data)
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return -ENOMEM;
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INIT_LIST_HEAD(&resource_list);
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ret = acpi_dev_get_resources(adev, &resource_list, misc_check_res,
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NULL);
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if (ret < 0)
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return -ENOENT;
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list_for_each_entry(rentry, &resource_list, node) {
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clk_data->base = devm_ioremap(&adev->dev, rentry->res->start,
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resource_size(rentry->res));
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break;
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}
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acpi_dev_free_resource_list(&resource_list);
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clkdev = platform_device_register_data(&adev->dev, "clk-st",
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PLATFORM_DEVID_NONE, clk_data,
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sizeof(*clk_data));
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return PTR_ERR_OR_ZERO(clkdev);
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}
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static const struct apd_device_desc cz_i2c_desc = {
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.setup = acpi_apd_setup,
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.fixed_clk_rate = 133000000,
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};
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static const struct apd_device_desc wt_i2c_desc = {
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.setup = acpi_apd_setup,
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.fixed_clk_rate = 150000000,
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};
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static struct property_entry uart_properties[] = {
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PROPERTY_ENTRY_U32("reg-io-width", 4),
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PROPERTY_ENTRY_U32("reg-shift", 2),
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PROPERTY_ENTRY_BOOL("snps,uart-16550-compatible"),
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{ },
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};
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static const struct apd_device_desc cz_uart_desc = {
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.setup = acpi_apd_setup,
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.fixed_clk_rate = 48000000,
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.properties = uart_properties,
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};
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static const struct apd_device_desc st_misc_desc = {
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.setup = st_misc_setup,
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};
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#endif
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#ifdef CONFIG_ARM64
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static const struct apd_device_desc xgene_i2c_desc = {
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.setup = acpi_apd_setup,
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.fixed_clk_rate = 100000000,
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};
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static const struct apd_device_desc vulcan_spi_desc = {
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.setup = acpi_apd_setup,
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.fixed_clk_rate = 133000000,
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};
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static const struct apd_device_desc hip07_i2c_desc = {
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.setup = acpi_apd_setup,
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.fixed_clk_rate = 200000000,
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};
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static const struct apd_device_desc hip08_i2c_desc = {
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.setup = acpi_apd_setup,
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.fixed_clk_rate = 250000000,
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};
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static const struct apd_device_desc thunderx2_i2c_desc = {
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.setup = acpi_apd_setup,
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.fixed_clk_rate = 125000000,
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};
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#endif
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#else
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#define APD_ADDR(desc) (0UL)
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#endif /* CONFIG_X86_AMD_PLATFORM_DEVICE */
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/**
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* Create platform device during acpi scan attach handle.
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* Return value > 0 on success of creating device.
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*/
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static int acpi_apd_create_device(struct acpi_device *adev,
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const struct acpi_device_id *id)
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{
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const struct apd_device_desc *dev_desc = (void *)id->driver_data;
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struct apd_private_data *pdata;
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struct platform_device *pdev;
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int ret;
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if (!dev_desc) {
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pdev = acpi_create_platform_device(adev, NULL);
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return IS_ERR_OR_NULL(pdev) ? PTR_ERR(pdev) : 1;
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}
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pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
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if (!pdata)
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return -ENOMEM;
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pdata->adev = adev;
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pdata->dev_desc = dev_desc;
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if (dev_desc->setup) {
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ret = dev_desc->setup(pdata);
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if (ret)
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goto err_out;
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}
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adev->driver_data = pdata;
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pdev = acpi_create_platform_device(adev, dev_desc->properties);
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if (!IS_ERR_OR_NULL(pdev))
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return 1;
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ret = PTR_ERR(pdev);
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adev->driver_data = NULL;
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err_out:
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kfree(pdata);
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return ret;
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}
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static const struct acpi_device_id acpi_apd_device_ids[] = {
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/* Generic apd devices */
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#ifdef CONFIG_X86_AMD_PLATFORM_DEVICE
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{ "AMD0010", APD_ADDR(cz_i2c_desc) },
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{ "AMDI0010", APD_ADDR(wt_i2c_desc) },
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{ "AMD0020", APD_ADDR(cz_uart_desc) },
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{ "AMDI0020", APD_ADDR(cz_uart_desc) },
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{ "AMD0030", },
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{ "AMD0040", APD_ADDR(st_misc_desc)},
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#endif
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#ifdef CONFIG_ARM64
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{ "APMC0D0F", APD_ADDR(xgene_i2c_desc) },
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{ "BRCM900D", APD_ADDR(vulcan_spi_desc) },
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{ "CAV900D", APD_ADDR(vulcan_spi_desc) },
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{ "CAV9007", APD_ADDR(thunderx2_i2c_desc) },
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{ "HISI02A1", APD_ADDR(hip07_i2c_desc) },
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{ "HISI02A2", APD_ADDR(hip08_i2c_desc) },
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#endif
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{ }
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};
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static struct acpi_scan_handler apd_handler = {
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.ids = acpi_apd_device_ids,
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.attach = acpi_apd_create_device,
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};
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void __init acpi_apd_init(void)
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{
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acpi_scan_add_handler(&apd_handler);
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}
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