From ce793486e23e0162a732c605189c8028e0910e86 Mon Sep 17 00:00:00 2001 From: Rafael J. Wysocki Date: Mon, 16 Mar 2015 23:49:03 +0100 Subject: driver core / ACPI: Represent ACPI companions using fwnode_handle Now that we have struct fwnode_handle, we can use that to point to ACPI companions from struct device objects instead of pointing to struct acpi_device directly. There are two benefits from that. First, the somewhat ugly and hackish struct acpi_dev_node can be dropped and, second, the same struct fwnode_handle pointer can be used in the future to point to other (non-ACPI) firmware device node types. Signed-off-by: Rafael J. Wysocki Acked-by: Greg Kroah-Hartman Acked-by: Grant Likely --- drivers/acpi/acpi_platform.c | 2 +- drivers/acpi/dock.c | 2 +- drivers/base/platform.c | 2 +- drivers/gpio/gpiolib.h | 2 ++ drivers/i2c/i2c-core.c | 4 ++-- 5 files changed, 7 insertions(+), 5 deletions(-) (limited to 'drivers') diff --git a/drivers/acpi/acpi_platform.c b/drivers/acpi/acpi_platform.c index 1284138e42ab..4bf75597f732 100644 --- a/drivers/acpi/acpi_platform.c +++ b/drivers/acpi/acpi_platform.c @@ -102,7 +102,7 @@ struct platform_device *acpi_create_platform_device(struct acpi_device *adev) pdevinfo.id = -1; pdevinfo.res = resources; pdevinfo.num_res = count; - pdevinfo.acpi_node.companion = adev; + pdevinfo.fwnode = acpi_fwnode_handle(adev); pdevinfo.dma_mask = DMA_BIT_MASK(32); pdev = platform_device_register_full(&pdevinfo); if (IS_ERR(pdev)) diff --git a/drivers/acpi/dock.c b/drivers/acpi/dock.c index d9339b442a4e..a688aa243f6c 100644 --- a/drivers/acpi/dock.c +++ b/drivers/acpi/dock.c @@ -615,7 +615,7 @@ void acpi_dock_add(struct acpi_device *adev) memset(&pdevinfo, 0, sizeof(pdevinfo)); pdevinfo.name = "dock"; pdevinfo.id = dock_station_count; - pdevinfo.acpi_node.companion = adev; + pdevinfo.fwnode = acpi_fwnode_handle(adev); pdevinfo.data = &ds; pdevinfo.size_data = sizeof(ds); dd = platform_device_register_full(&pdevinfo); diff --git a/drivers/base/platform.c b/drivers/base/platform.c index 9421fed40905..17f0204fabef 100644 --- a/drivers/base/platform.c +++ b/drivers/base/platform.c @@ -454,7 +454,7 @@ struct platform_device *platform_device_register_full( goto err_alloc; pdev->dev.parent = pdevinfo->parent; - ACPI_COMPANION_SET(&pdev->dev, pdevinfo->acpi_node.companion); + pdev->dev.fwnode = pdevinfo->fwnode; if (pdevinfo->dma_mask) { /* diff --git a/drivers/gpio/gpiolib.h b/drivers/gpio/gpiolib.h index 550a5eafbd38..ab892be26dc2 100644 --- a/drivers/gpio/gpiolib.h +++ b/drivers/gpio/gpiolib.h @@ -17,6 +17,8 @@ enum of_gpio_flags; +struct acpi_device; + /** * struct acpi_gpio_info - ACPI GPIO specific information * @gpioint: if %true this GPIO is of type GpioInt otherwise type is GpioIo diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c index edf274cabe81..c87c31387e2d 100644 --- a/drivers/i2c/i2c-core.c +++ b/drivers/i2c/i2c-core.c @@ -133,7 +133,7 @@ static acpi_status acpi_i2c_add_device(acpi_handle handle, u32 level, return AE_OK; memset(&info, 0, sizeof(info)); - info.acpi_node.companion = adev; + info.fwnode = acpi_fwnode_handle(adev); info.irq = -1; INIT_LIST_HEAD(&resource_list); @@ -971,7 +971,7 @@ i2c_new_device(struct i2c_adapter *adap, struct i2c_board_info const *info) client->dev.bus = &i2c_bus_type; client->dev.type = &i2c_client_type; client->dev.of_node = info->of_node; - ACPI_COMPANION_SET(&client->dev, info->acpi_node.companion); + client->dev.fwnode = info->fwnode; i2c_dev_set_name(adap, client); status = device_register(&client->dev); -- cgit v1.2.3 From ca5b74d2675a44f54aacb919c1cf022463e2f738 Mon Sep 17 00:00:00 2001 From: Rafael J. Wysocki Date: Mon, 16 Mar 2015 23:49:08 +0100 Subject: ACPI: Introduce has_acpi_companion() Now that the ACPI companions of devices are represented by pointers to struct fwnode_handle, it is not quite efficient to check whether or not an ACPI companion of a device is present by evaluating the ACPI_COMPANION() macro. For this reason, introduce a special static inline routine for that, has_acpi_companion(), and update the code to use it where applicable. Signed-off-by: Rafael J. Wysocki --- drivers/acpi/glue.c | 4 ++-- drivers/i2c/busses/i2c-designware-platdrv.c | 4 ++-- drivers/iommu/intel-iommu.c | 2 +- include/linux/acpi.h | 10 ++++++++++ 4 files changed, 15 insertions(+), 5 deletions(-) (limited to 'drivers') diff --git a/drivers/acpi/glue.c b/drivers/acpi/glue.c index f774c65ecb8b..39c485b0c25c 100644 --- a/drivers/acpi/glue.c +++ b/drivers/acpi/glue.c @@ -168,7 +168,7 @@ int acpi_bind_one(struct device *dev, struct acpi_device *acpi_dev) unsigned int node_id; int retval = -EINVAL; - if (ACPI_COMPANION(dev)) { + if (has_acpi_companion(dev)) { if (acpi_dev) { dev_warn(dev, "ACPI companion already set\n"); return -EINVAL; @@ -220,7 +220,7 @@ int acpi_bind_one(struct device *dev, struct acpi_device *acpi_dev) list_add(&physical_node->node, physnode_list); acpi_dev->physical_node_count++; - if (!ACPI_COMPANION(dev)) + if (!has_acpi_companion(dev)) ACPI_COMPANION_SET(dev, acpi_dev); acpi_physnode_link_name(physical_node_name, node_id); diff --git a/drivers/i2c/busses/i2c-designware-platdrv.c b/drivers/i2c/busses/i2c-designware-platdrv.c index c270f5f9a8f9..538d6910b550 100644 --- a/drivers/i2c/busses/i2c-designware-platdrv.c +++ b/drivers/i2c/busses/i2c-designware-platdrv.c @@ -166,7 +166,7 @@ static int dw_i2c_probe(struct platform_device *pdev) /* fast mode by default because of legacy reasons */ clk_freq = 400000; - if (ACPI_COMPANION(&pdev->dev)) { + if (has_acpi_companion(&pdev->dev)) { dw_i2c_acpi_configure(pdev); } else if (pdev->dev.of_node) { of_property_read_u32(pdev->dev.of_node, @@ -286,7 +286,7 @@ static int dw_i2c_remove(struct platform_device *pdev) pm_runtime_put(&pdev->dev); pm_runtime_disable(&pdev->dev); - if (ACPI_COMPANION(&pdev->dev)) + if (has_acpi_companion(&pdev->dev)) dw_i2c_acpi_unconfigure(pdev); return 0; diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index ae4c1a854e57..591b84331315 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -684,7 +684,7 @@ static struct intel_iommu *device_to_iommu(struct device *dev, u8 *bus, u8 *devf if (dev_is_pci(dev)) { pdev = to_pci_dev(dev); segment = pci_domain_nr(pdev->bus); - } else if (ACPI_COMPANION(dev)) + } else if (has_acpi_companion(dev)) dev = &ACPI_COMPANION(dev)->dev; rcu_read_lock(); diff --git a/include/linux/acpi.h b/include/linux/acpi.h index 402ddbdc2da1..ec488d03b518 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -58,6 +58,11 @@ static inline acpi_handle acpi_device_handle(struct acpi_device *adev) acpi_fwnode_handle(adev) : NULL #define ACPI_HANDLE(dev) acpi_device_handle(ACPI_COMPANION(dev)) +static inline bool has_acpi_companion(struct device *dev) +{ + return is_acpi_node(dev->fwnode); +} + static inline void acpi_preset_companion(struct device *dev, struct acpi_device *parent, u64 addr) { @@ -472,6 +477,11 @@ static inline struct fwnode_handle *acpi_fwnode_handle(struct acpi_device *adev) return NULL; } +static inline bool has_acpi_companion(struct device *dev) +{ + return false; +} + static inline const char *acpi_dev_name(struct acpi_device *adev) { return NULL; -- cgit v1.2.3