diff options
Diffstat (limited to 'drivers/clk/x86/clk-lpss.c')
-rw-r--r-- | drivers/clk/x86/clk-lpss.c | 99 |
1 files changed, 0 insertions, 99 deletions
diff --git a/drivers/clk/x86/clk-lpss.c b/drivers/clk/x86/clk-lpss.c deleted file mode 100644 index b5e229f3c3d..00000000000 --- a/drivers/clk/x86/clk-lpss.c +++ /dev/null @@ -1,99 +0,0 @@ -/* - * Intel Low Power Subsystem clocks. - * - * Copyright (C) 2013, Intel Corporation - * Authors: Mika Westerberg <mika.westerberg@linux.intel.com> - * Heikki Krogerus <heikki.krogerus@linux.intel.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/acpi.h> -#include <linux/clk.h> -#include <linux/clk-provider.h> -#include <linux/err.h> -#include <linux/io.h> -#include <linux/module.h> - -static int clk_lpss_is_mmio_resource(struct acpi_resource *res, void *data) -{ - struct resource r; - return !acpi_dev_resource_memory(res, &r); -} - -static acpi_status clk_lpss_find_mmio(acpi_handle handle, u32 level, - void *data, void **retval) -{ - struct resource_list_entry *rentry; - struct list_head resource_list; - struct acpi_device *adev; - const char *uid = data; - int ret; - - if (acpi_bus_get_device(handle, &adev)) - return AE_OK; - - if (uid) { - if (!adev->pnp.unique_id) - return AE_OK; - if (strcmp(uid, adev->pnp.unique_id)) - return AE_OK; - } - - INIT_LIST_HEAD(&resource_list); - ret = acpi_dev_get_resources(adev, &resource_list, - clk_lpss_is_mmio_resource, NULL); - if (ret < 0) - return AE_NO_MEMORY; - - list_for_each_entry(rentry, &resource_list, node) - if (resource_type(&rentry->res) == IORESOURCE_MEM) { - *(struct resource *)retval = rentry->res; - break; - } - - acpi_dev_free_resource_list(&resource_list); - return AE_OK; -} - -/** - * clk_register_lpss_gate - register LPSS clock gate - * @name: name of this clock gate - * @parent_name: parent clock name - * @hid: ACPI _HID of the device - * @uid: ACPI _UID of the device (optional) - * @offset: LPSS PRV_CLOCK_PARAMS offset - * - * Creates and registers LPSS clock gate. - */ -struct clk *clk_register_lpss_gate(const char *name, const char *parent_name, - const char *hid, const char *uid, - unsigned offset) -{ - struct resource res = { }; - void __iomem *mmio_base; - acpi_status status; - struct clk *clk; - - /* - * First try to look the device and its mmio resource from the - * ACPI namespace. - */ - status = acpi_get_devices(hid, clk_lpss_find_mmio, (void *)uid, - (void **)&res); - if (ACPI_FAILURE(status) || !res.start) - return ERR_PTR(-ENODEV); - - mmio_base = ioremap(res.start, resource_size(&res)); - if (!mmio_base) - return ERR_PTR(-ENOMEM); - - clk = clk_register_gate(NULL, name, parent_name, 0, mmio_base + offset, - 0, 0, NULL); - if (IS_ERR(clk)) - iounmap(mmio_base); - - return clk; -} |