diff options
Diffstat (limited to 'drivers/acpi/acpi_apd.c')
| -rw-r--r-- | drivers/acpi/acpi_apd.c | 261 |
1 files changed, 261 insertions, 0 deletions
diff --git a/drivers/acpi/acpi_apd.c b/drivers/acpi/acpi_apd.c new file mode 100644 index 000000000..80f945cbe --- /dev/null +++ b/drivers/acpi/acpi_apd.c @@ -0,0 +1,261 @@ +// 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/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); +} |