Use sdw_master_device and driver instead of platform devices
To quote GregKH:
"Don't mess with a platform device unless you really have no other
possible choice. And even then, don't do it and try to do something
else. Platform devices are really abused, don't perpetuate it "
In addition, rather than a plain-vanilla init/exit, this patch
provides 3 steps in the initialization (ACPI scan, probe, startup)
which make it easier to verify support and allocate required resources
as early as possible, and conversely help make the startup
lighter-weight with only hardware register setup.
The data structures are also consolidated in a single file and
comments added to help follow what is used for what.
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx>
---
drivers/soundwire/intel.c | 90 +++++----
drivers/soundwire/intel.h | 22 +--
drivers/soundwire/intel_init.c | 293 +++++++++++++++++++---------
include/linux/soundwire/sdw_intel.h | 86 +++++++-
4 files changed, 344 insertions(+), 147 deletions(-)
diff --git a/drivers/soundwire/intel.c b/drivers/soundwire/intel.c
index 8a1f6c627788..267e0fad7494 100644
--- a/drivers/soundwire/intel.c
+++ b/drivers/soundwire/intel.c
@@ -92,8 +92,6 @@
#define SDW_ALH_STRMZCFG_DMAT GENMASK(7, 0)
#define SDW_ALH_STRMZCFG_CHN GENMASK(19, 16)
-#define SDW_INTEL_QUIRK_MASK_BUS_DISABLE BIT(1)
-
enum intel_pdi_type {
INTEL_PDI_IN = 0,
INTEL_PDI_OUT = 1,
@@ -909,24 +907,23 @@ static int intel_init(struct sdw_intel *sdw)
/*
* probe and init
*/
-static int intel_probe(struct platform_device *pdev)
+static int intel_master_probe(struct sdw_master_device *md, void *link_ctx)
{
- struct sdw_cdns_stream_config config;
struct sdw_intel *sdw;
int ret;
- sdw = devm_kzalloc(&pdev->dev, sizeof(*sdw), GFP_KERNEL);
+ sdw = devm_kzalloc(&md->dev, sizeof(*sdw), GFP_KERNEL);
if (!sdw)
return -ENOMEM;
- sdw->instance = pdev->id;
- sdw->link_res = dev_get_platdata(&pdev->dev);
- sdw->cdns.dev = &pdev->dev;
+ sdw->instance = md->link_id;
+ sdw->link_res = link_ctx;
+ sdw->cdns.dev = &md->dev;
sdw->cdns.registers = sdw->link_res->registers;
- sdw->cdns.instance = sdw->instance;
+ sdw->cdns.instance = md->link_id;
sdw->cdns.msg_count = 0;
- sdw->cdns.bus.dev = &pdev->dev;
- sdw->cdns.bus.link_id = pdev->id;
+ sdw->cdns.bus.dev = &md->dev;
+ sdw->cdns.bus.link_id = md->link_id;
sdw_cdns_probe(&sdw->cdns);
@@ -934,16 +931,50 @@ static int intel_probe(struct platform_device *pdev)
sdw_intel_ops.read_prop = intel_prop_read;
sdw->cdns.bus.ops = &sdw_intel_ops;
- platform_set_drvdata(pdev, sdw);
+ md->pdata = sdw;
+
+ /* set driver data, accessed by snd_soc_dai_set_drvdata() */
+ dev_set_drvdata(&md->dev, &sdw->cdns);
ret = sdw_add_bus_master(&sdw->cdns.bus);
if (ret) {
- dev_err(&pdev->dev, "sdw_add_bus_master fail: %d\n", ret);
+ dev_err(&md->dev, "sdw_add_bus_master fail: %d\n", ret);
return ret;
}
if (sdw->cdns.bus.prop.hw_disabled) {
- dev_info(&pdev->dev, "SoundWire master %d is disabled, ignoring\n",
+ dev_info(&md->dev, "SoundWire master %d is disabled, ignoring\n",
+ sdw->cdns.bus.link_id);
+ return 0;
+ }
+
+ /* Acquire IRQ */
+ ret = request_threaded_irq(sdw->link_res->irq,
+ sdw_cdns_irq, sdw_cdns_thread,
+ IRQF_SHARED, KBUILD_MODNAME, &sdw->cdns);
+ if (ret < 0) {
+ dev_err(sdw->cdns.dev, "unable to grab IRQ %d, disabling device\n",
+ sdw->link_res->irq);
+ goto err_init;
+ }
+
+ return 0;
+
+err_init:
+ sdw_delete_bus_master(&sdw->cdns.bus);
+ return ret;
+}
+
+static int intel_master_startup(struct sdw_master_device *md)
+{
+ struct sdw_cdns_stream_config config;
+ struct sdw_intel *sdw;
+ int ret;
+
+ sdw = md->pdata;
+
+ if (sdw->cdns.bus.prop.hw_disabled) {
+ dev_info(&md->dev, "SoundWire master %d is disabled, ignoring\n",
sdw->cdns.bus.link_id);
return 0;
}
@@ -961,16 +992,6 @@ static int intel_probe(struct platform_device *pdev)
intel_pdi_ch_update(sdw);
- /* Acquire IRQ */
- ret = request_threaded_irq(sdw->link_res->irq,
- sdw_cdns_irq, sdw_cdns_thread,
- IRQF_SHARED, KBUILD_MODNAME, &sdw->cdns);
- if (ret < 0) {
- dev_err(sdw->cdns.dev, "unable to grab IRQ %d, disabling device\n",
- sdw->link_res->irq);
- goto err_init;
- }
-
ret = sdw_cdns_enable_interrupt(&sdw->cdns, true);
if (ret < 0) {
dev_err(sdw->cdns.dev, "cannot enable interrupts\n");
@@ -997,18 +1018,17 @@ static int intel_probe(struct platform_device *pdev)
err_interrupt:
sdw_cdns_enable_interrupt(&sdw->cdns, false);
-err_dai:
- free_irq(sdw->link_res->irq, sdw);
err_init:
+ free_irq(sdw->link_res->irq, sdw);
sdw_delete_bus_master(&sdw->cdns.bus);
return ret;
}
-static int intel_remove(struct platform_device *pdev)
+static int intel_master_remove(struct sdw_master_device *md)
{
struct sdw_intel *sdw;
- sdw = platform_get_drvdata(pdev);
+ sdw = md->pdata;
if (!sdw->cdns.bus.prop.hw_disabled) {
intel_debugfs_exit(sdw);
@@ -1021,16 +1041,12 @@ static int intel_remove(struct platform_device *pdev)
return 0;
}
-static struct platform_driver sdw_intel_drv = {
- .probe = intel_probe,
- .remove = intel_remove,
- .driver = {
- .name = "int-sdw",
-
- },
+struct sdw_md_driver intel_sdw_driver = {
+ .probe = intel_master_probe,
+ .startup = intel_master_startup,
+ .remove = intel_master_remove,
};
-
-module_platform_driver(sdw_intel_drv);
+EXPORT_SYMBOL(intel_sdw_driver);
MODULE_LICENSE("Dual BSD/GPL");
MODULE_ALIAS("platform:int-sdw");
diff --git a/drivers/soundwire/intel.h b/drivers/soundwire/intel.h
index d923b6262330..25cc51e15ef5 100644
--- a/drivers/soundwire/intel.h
+++ b/drivers/soundwire/intel.h
@@ -4,24 +4,8 @@
#ifndef __SDW_INTEL_LOCAL_H
#define __SDW_INTEL_LOCAL_H
-/**
- * struct sdw_intel_link_res - Soundwire link resources
- * @registers: Link IO registers base
- * @shim: Audio shim pointer
- * @alh: ALH (Audio Link Hub) pointer
- * @irq: Interrupt line
- * @ops: Shim callback ops
- * @arg: Shim callback ops argument
- *
- * This is set as pdata for each link instance.
- */
-struct sdw_intel_link_res {
- void __iomem *registers;
- void __iomem *shim;
- void __iomem *alh;
- int irq;
- const struct sdw_intel_ops *ops;
- void *arg;
-};
+#define SDW_INTEL_QUIRK_MASK_BUS_DISABLE BIT(1)
+
+extern struct sdw_md_driver intel_sdw_driver;
#endif /* __SDW_INTEL_LOCAL_H */
diff --git a/drivers/soundwire/intel_init.c b/drivers/soundwire/intel_init.c
index d488c44fcbae..47124fc13a4a 100644
--- a/drivers/soundwire/intel_init.c
+++ b/drivers/soundwire/intel_init.c
@@ -11,7 +11,7 @@
#include <linux/export.h>
#include <linux/iomap.h>
#include <linux/module.h>
-#include <linux/platform_device.h>
+#include <linux/soundwire/sdw.h>
#include <linux/soundwire/sdw_intel.h>
#include "intel.h"
@@ -27,28 +27,45 @@ static int link_mask;
module_param_named(sdw_link_mask, link_mask, int, 0444);
MODULE_PARM_DESC(sdw_link_mask, "Intel link mask (one bit per link)");
-struct sdw_link_data {
- struct sdw_intel_link_res res;
- struct platform_device *pdev;
-};
+static bool is_link_enabled(struct fwnode_handle *fw_node, int i)
+{
+ struct fwnode_handle *link;
+ char name[32];
+ u32 quirk_mask = 0;
-struct sdw_intel_ctx {
- int count;
- struct sdw_link_data *links;
-};
+ /* Find master handle */
+ snprintf(name, sizeof(name),
+ "mipi-sdw-link-%d-subproperties", i);
+
+ link = fwnode_get_named_child_node(fw_node, name);
+ if (!link)
+ return false;
-static int sdw_intel_cleanup_pdev(struct sdw_intel_ctx *ctx)
+ fwnode_property_read_u32(link,
+ "intel-quirk-mask",
+ &quirk_mask);
+
+ if (quirk_mask & SDW_INTEL_QUIRK_MASK_BUS_DISABLE)
+ return false;
+
+ return true;
+}
+
+static int sdw_intel_cleanup(struct sdw_intel_ctx *ctx)
{
- struct sdw_link_data *link = ctx->links;
+ struct sdw_intel_link_res *link = ctx->links;
+ struct sdw_master_device *md;
int i;
if (!link)
return 0;
- for (i = 0; i < ctx->count; i++) {
- if (link->pdev)
- platform_device_unregister(link->pdev);
- link++;
+ for (i = 0; i < ctx->count; i++, link++) {
+ md = link->md;
+ if (md) {
+ md->driver->remove(md);
+ put_device(&md->dev);
+ }
}
kfree(ctx->links);
@@ -57,115 +74,187 @@ static int sdw_intel_cleanup_pdev(struct sdw_intel_ctx *ctx)
return 0;
}
-static struct sdw_intel_ctx
-*sdw_intel_add_controller(struct sdw_intel_res *res)
+static int
+sdw_intel_scan_controller(struct sdw_intel_acpi_info *info)
{
- struct platform_device_info pdevinfo;
- struct platform_device *pdev;
- struct sdw_link_data *link;
- struct sdw_intel_ctx *ctx;
struct acpi_device *adev;
int ret, i;
u8 count;
- u32 caps;
- if (acpi_bus_get_device(res->handle, &adev))
- return NULL;
+ if (acpi_bus_get_device(info->handle, &adev))
+ return -EINVAL;
/* Found controller, find links supported */
count = 0;
ret = fwnode_property_read_u8_array(acpi_fwnode_handle(adev),
"mipi-sdw-master-count", &count, 1);
- /* Don't fail on error, continue and use hw value */
+ /*
+ * In theory we could check the number of links supported in
+ * hardware, but in that step we cannot assume SoundWire IP is
+ * powered.
+ *
+ * In addition, if the BIOS doesn't even provide this
+ * 'master-count' property then all the inits based on link
+ * masks will fail as well.
+ *
+ * We will check the hardware capabilities in the startup() step
+ */
+
if (ret) {
dev_err(&adev->dev,
"Failed to read mipi-sdw-master-count: %d\n", ret);
- count = SDW_MAX_LINKS;
+ return -EINVAL;
}
- /* Check SNDWLCAP.LCOUNT */
- caps = ioread32(res->mmio_base + SDW_SHIM_BASE + SDW_SHIM_LCAP);
- caps &= GENMASK(2, 0);
-
- /* Check HW supported vs property value and use min of two */
- count = min_t(u8, caps, count);
-
/* Check count is within bounds */
if (count > SDW_MAX_LINKS) {
dev_err(&adev->dev, "Link count %d exceeds max %d\n",
count, SDW_MAX_LINKS);
- return NULL;
+ return -EINVAL;
} else if (!count) {
dev_warn(&adev->dev, "No SoundWire links detected\n");
- return NULL;
+ return -EINVAL;
}
+ dev_dbg(&adev->dev, "Detected %d SDW Link devices\n", count);
+ info->count = count;
+
+ for (i = 0; i < count; i++) {
+ if (link_mask && !(link_mask & BIT(i))) {
+ dev_dbg(&adev->dev,
+ "Link %d masked, will not be enabled\n", i);
+ continue;
+ }
+
+ if (!is_link_enabled(acpi_fwnode_handle(adev), i))
+ continue;
+
+ info->link_mask |= BIT(i);
+ }
+
+ return 0;
+}
+
+static struct sdw_intel_ctx
+*sdw_intel_probe_controller(struct sdw_intel_res *res)
+{
+ struct sdw_intel_link_res *link;
+ struct sdw_intel_ctx *ctx;
+ struct acpi_device *adev;
+ struct sdw_master_device *md;
+ u32 link_mask;
+ int count;
+ int i;
+
+ if (acpi_bus_get_device(res->handle, &adev))
+ return NULL;
+
+ if (!res || !res->count)
+ return NULL;
+
+ count = res->count;
dev_dbg(&adev->dev, "Creating %d SDW Link devices\n", count);
ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
if (!ctx)
return NULL;
- ctx->count = count;
- ctx->links = kcalloc(ctx->count, sizeof(*ctx->links), GFP_KERNEL);
+ ctx->links = kcalloc(count, sizeof(*ctx->links), GFP_KERNEL);
if (!ctx->links)
goto link_err;
+ ctx->count = count;
+ ctx->mmio_base = res->mmio_base;
+ ctx->link_mask = res->link_mask;
+ ctx->handle = res->handle;
+
link = ctx->links;
+ link_mask = ctx->link_mask;
/* Create SDW Master devices */
- for (i = 0; i < count; i++) {
- if (link_mask && !(link_mask & BIT(i))) {
- dev_dbg(&adev->dev,
- "Link %d masked, will not be enabled\n", i);
- link++;
+ for (i = 0; i < count; i++, link++) {
+ if (link_mask && !(link_mask & BIT(i)))
continue;
- }
- link->res.irq = res->irq;
- link->res.registers = res->mmio_base + SDW_LINK_BASE
- + (SDW_LINK_SIZE * i);
- link->res.shim = res->mmio_base + SDW_SHIM_BASE;
- link->res.alh = res->mmio_base + SDW_ALH_BASE;
-
- link->res.ops = res->ops;
- link->res.arg = res->arg;
-
- memset(&pdevinfo, 0, sizeof(pdevinfo));
-
- pdevinfo.parent = res->parent;
- pdevinfo.name = "int-sdw";
- pdevinfo.id = i;
- pdevinfo.fwnode = acpi_fwnode_handle(adev);
- pdevinfo.data = &link->res;
- pdevinfo.size_data = sizeof(link->res);
-
- pdev = platform_device_register_full(&pdevinfo);
- if (IS_ERR(pdev)) {
- dev_err(&adev->dev,
- "platform device creation failed: %ld\n",
- PTR_ERR(pdev));
- goto pdev_err;
- }
+ md = sdw_md_add(&intel_sdw_driver,
+ &adev->dev,
+ acpi_fwnode_handle(adev),
+ i);
- link->pdev = pdev;
- link++;
+ if (IS_ERR(md)) {
+ dev_err(&adev->dev, "Could not create link %d\n", i);
+ goto err;
+ }
+ link->md = md;
+ link->mmio_base = res->mmio_base;
+ link->registers = res->mmio_base + SDW_LINK_BASE
+ + (SDW_LINK_SIZE * i);
+ link->shim = res->mmio_base + SDW_SHIM_BASE;
+ link->alh = res->mmio_base + SDW_ALH_BASE;
+ link->irq = res->irq;
+ link->ops = res->ops;
+ link->arg = res->arg;
+
+ /* let the SoundWire master driver to its probe */
+ md->driver->probe(md, link);
}
return ctx;
-pdev_err:
- sdw_intel_cleanup_pdev(ctx);
+err:
+ sdw_intel_cleanup(ctx);
link_err:
kfree(ctx);
return NULL;
}
+static int
+sdw_intel_startup_controller(struct sdw_intel_ctx *ctx)
+{
+ struct acpi_device *adev;
+ struct sdw_intel_link_res *link;
+ struct sdw_master_device *md;
+ u32 caps;
+ int i;
+
+ if (acpi_bus_get_device(ctx->handle, &adev))
+ return -EINVAL;
+
+ /* Check SNDWLCAP.LCOUNT */
+ caps = ioread32(ctx->mmio_base + SDW_SHIM_BASE + SDW_SHIM_LCAP);
+ caps &= GENMASK(2, 0);
+
+ /* Check HW supported vs property value */
+ if (caps < ctx->count) {
+ dev_err(&adev->dev,
+ "BIOS master count is larger than hardware capabilities\n");
+ return -EINVAL;
+ }
+
+ if (!ctx->links)
+ return -EINVAL;
+
+ link = ctx->links;
+ link_mask = ctx->link_mask;
+
+ /* Create SDW Master devices */
+ for (i = 0; i < ctx->count; i++, link++) {
+ if (link_mask && !(link_mask & BIT(i)))
+ continue;
+
+ md = link->md;
+
+ md->driver->startup(md);
+ }
+
+ return 0;
+}
+
static acpi_status sdw_intel_acpi_cb(acpi_handle handle, u32 level,
void *cdata, void **return_value)
{
- struct sdw_intel_res *res = cdata;
+ struct sdw_intel_acpi_info *info = cdata;
struct acpi_device *adev;
acpi_status status;
u64 adr;
@@ -179,7 +268,7 @@ static acpi_status sdw_intel_acpi_cb(acpi_handle handle, u32 level,
return AE_NOT_FOUND;
}
- res->handle = handle;
+ info->handle = handle;
/*
* On some Intel platforms, multiple children of the HDAS
@@ -196,40 +285,68 @@ static acpi_status sdw_intel_acpi_cb(acpi_handle handle, u32 level,
}
/**
- * sdw_intel_init() - SoundWire Intel init routine
+ * sdw_intel_acpi_scan() - SoundWire Intel init routine
* @parent_handle: ACPI parent handle
- * @res: resource data
+ * @info: description of what firmware/DSDT tables expose
*
- * This scans the namespace and creates SoundWire link controller devices
- * based on the info queried.
+ * This scans the namespace and queries firmware to figure out which
+ * links to enable. A follow-up use of sdw_intel_probe() and
+ * sdw_intel_startup() is required for creation of devices and bus
+ * startup
*/
-void *sdw_intel_init(acpi_handle *parent_handle, struct sdw_intel_res *res)
+int sdw_intel_acpi_scan(acpi_handle *parent_handle,
+ struct sdw_intel_acpi_info *info)
{
acpi_status status;
status = acpi_walk_namespace(ACPI_TYPE_DEVICE,
parent_handle, 1,
sdw_intel_acpi_cb,
- NULL, res, NULL);
+ NULL, info, NULL);
if (ACPI_FAILURE(status))
- return NULL;
+ return -ENODEV;
- return sdw_intel_add_controller(res);
+ return sdw_intel_scan_controller(info);
}
-EXPORT_SYMBOL(sdw_intel_init);
+EXPORT_SYMBOL(sdw_intel_acpi_scan);
+/**
+ * sdw_intel_probe() - SoundWire Intel probe routine
+ * @parent_handle: ACPI parent handle
+ * @res: resource data
+ *
+ * This creates SoundWire Master and Slave devices below the controller.
+ * All the information necessary is stored in the context, and the res
+ * argument pointer can be freed after this step.
+ */
+struct sdw_intel_ctx
+*sdw_intel_probe(struct sdw_intel_res *res)
+{
+ return sdw_intel_probe_controller(res);
+}
+EXPORT_SYMBOL(sdw_intel_probe);
+
+/**
+ * sdw_intel_startup() - SoundWire Intel startup
+ * @ctx: SoundWire context allocated in the probe
+ *
+ */
+int sdw_intel_startup(struct sdw_intel_ctx *ctx)
+{
+ return sdw_intel_startup_controller(ctx);
+}
+EXPORT_SYMBOL(sdw_intel_startup);
/**
* sdw_intel_exit() - SoundWire Intel exit
- * @arg: callback context
+ * @ctx: SoundWire context allocated in the probe
*
* Delete the controller instances created and cleanup
*/
-void sdw_intel_exit(void *arg)
+void sdw_intel_exit(struct sdw_intel_ctx *ctx)
{
- struct sdw_intel_ctx *ctx = arg;
-
- sdw_intel_cleanup_pdev(ctx);
+ sdw_intel_cleanup(ctx);
kfree(ctx);
+ ctx = NULL;
}
EXPORT_SYMBOL(sdw_intel_exit);
diff --git a/include/linux/soundwire/sdw_intel.h b/include/linux/soundwire/sdw_intel.h
index c9427cb6020b..0ce3e4023074 100644
--- a/include/linux/soundwire/sdw_intel.h
+++ b/include/linux/soundwire/sdw_intel.h
@@ -16,24 +16,104 @@ struct sdw_intel_ops {
};
/**
- * struct sdw_intel_res - Soundwire Intel resource structure
+ * struct sdw_intel_acpi_info - Soundwire Intel information found in ACPI tables
+ * @handle: ACPI controller handle
+ * @count: link count found with "sdw-master-count" property
+ * @link_mask: bit-wise mask listing links enabled by BIOS menu
+ *
+ * this structure could be expanded to e.g. provide all the _ADR
+ * information in case the link_mask is not sufficient to identify
+ * platform capabilities.
+ */
+struct sdw_intel_acpi_info {
+ acpi_handle handle;
+ int count;
+ u32 link_mask;
+};
+
+/**
+ * struct sdw_intel_res - Soundwire Intel global resource structure,
+ * typically populated by the DSP driver
+ *
+ * @count: link count (may be filtered by DSP driver)
* @mmio_base: mmio base of SoundWire registers
* @irq: interrupt number
* @handle: ACPI parent handle
* @parent: parent device
* @ops: callback ops
* @arg: callback arg
+ * @link_mask: bit-wise mask listing links selected by the DSP driver
*/
struct sdw_intel_res {
+ int count;
void __iomem *mmio_base;
int irq;
acpi_handle handle;
struct device *parent;
const struct sdw_intel_ops *ops;
void *arg;
+ u32 link_mask;
};
-void *sdw_intel_init(acpi_handle *parent_handle, struct sdw_intel_res *res);
-void sdw_intel_exit(void *arg);
+/**
+ * struct sdw_intel_link_res - Soundwire Intel link resource structure,
+ * typically populated by the controller driver.
+ * @md: Master device
+ * @mmio_base: mmio base of SoundWire registers
+ * @registers: Link IO registers base
+ * @shim: Audio shim pointer
+ * @alh: ALH (Audio Link Hub) pointer
+ * @irq: Interrupt line
+ * @ops: Shim callback ops
+ * @arg: Shim callback ops argument
+ */
+struct sdw_intel_link_res {
+ struct sdw_master_device *md;
+ void __iomem *mmio_base; /* not strictly needed, useful for debug */
+ void __iomem *registers;
+ void __iomem *shim;
+ void __iomem *alh;
+ int irq;
+ const struct sdw_intel_ops *ops;
+ void *arg;
+};
+
+/**
+ * struct sdw_intel_ctx - context allocated by the controller
+ * driver probe
+ * @count: link count
+ * @mmio_base: mmio base of SoundWire registers, only used to check
+ * hardware capabilities after all power dependencies are settled.
+ * @arg: Shim callback ops argument
+ */
+struct sdw_intel_ctx {
+ int count;
+ void __iomem *mmio_base;
+ u32 link_mask;
+ acpi_handle handle;
+ struct sdw_intel_link_res *links;
+};
+
+/*
+ * On Intel platforms, the SoundWire IP has dependencies on power
+ * rails shared with the DSP, and the initialization steps are split
+ * in three. First an ACPI scan to check what the firmware describes
+ * in DSDT tables, then an allocation step (with no hardware
+ * configuration but with all the relevant devices created) and last
+ * the actual hardware configuration. The final stage is a global
+ * interrupt enable which is controlled by the DSP driver. Splitting
+ * these phases helps simplify the boot flow and make early decisions
+ * on e.g. which machine driver to select (I2S mode, HDaudio or
+ * SoundWire).
+ */
+int sdw_intel_acpi_scan(acpi_handle *parent_handle,
+ struct sdw_intel_acpi_info *info);
+
+struct sdw_intel_ctx *
+sdw_intel_probe(struct sdw_intel_res *res);
+
+int sdw_intel_startup(struct sdw_intel_ctx *ctx);
+
+void sdw_intel_exit(struct sdw_intel_ctx *ctx);
#endif
--
2.20.1
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