mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-21 11:44:01 +08:00
a217726a7d
For structure types defined in the same file or local header files, find top-level static structure declarations that have the following properties: 1. Never reassigned. 2. Address never taken 3. Not passed to a top-level macro call 4. No pointer or array-typed field passed to a function or stored in a variable. Declare structures having all of these properties as const. Done using Coccinelle. Based on a suggestion by Joe Perches <joe@perches.com>. Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
186 lines
4.4 KiB
C
186 lines
4.4 KiB
C
/*
|
|
* 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>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
|
|
#include <linux/clk-provider.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/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 = ERR_PTR(-ENODEV);
|
|
|
|
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 const struct apd_device_desc cz_i2c_desc = {
|
|
.setup = acpi_apd_setup,
|
|
.fixed_clk_rate = 133000000,
|
|
};
|
|
|
|
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,
|
|
};
|
|
#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,
|
|
};
|
|
#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);
|
|
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;
|
|
}
|
|
|
|
if (dev_desc->properties) {
|
|
ret = device_add_properties(&adev->dev, dev_desc->properties);
|
|
if (ret)
|
|
goto err_out;
|
|
}
|
|
|
|
adev->driver_data = pdata;
|
|
pdev = acpi_create_platform_device(adev);
|
|
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(cz_i2c_desc) },
|
|
{ "AMD0020", APD_ADDR(cz_uart_desc) },
|
|
{ "AMDI0020", APD_ADDR(cz_uart_desc) },
|
|
{ "AMD0030", },
|
|
#endif
|
|
#ifdef CONFIG_ARM64
|
|
{ "APMC0D0F", APD_ADDR(xgene_i2c_desc) },
|
|
{ "BRCM900D", APD_ADDR(vulcan_spi_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);
|
|
}
|