[PATCH v2] soundwire: intel: Remove unused function

26 Apr 2020

The function sdw_intel_init() is not used anywhere, remove it for now.
And that makes sdw_intel_add_controller(), sdw_intel_acpi_cb() and
link_mask unused, so remove them as well.
Signed-off-by: Sudip Mukherjee sudipm.mukherjee@gmail.com
---
 drivers/soundwire/intel_init.c | 162 -----------------------------------------
 1 file changed, 162 deletions(-)

diff --git a/drivers/soundwire/intel_init.c b/drivers/soundwire/intel_init.c
index ad7053463889..d90929a5043b 100644
--- a/drivers/soundwire/intel_init.c
+++ b/drivers/soundwire/intel_init.c
@@ -23,10 +23,6 @@
 #define SDW_LINK_BASE		0x30000
 #define SDW_LINK_SIZE		0x10000
-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)");
-
 static int sdw_intel_cleanup_pdev(struct sdw_intel_ctx *ctx)
 {
    struct sdw_intel_link_res *link = ctx->links;
@@ -47,164 +43,6 @@ 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)
-{
-	struct platform_device_info pdevinfo;
-	struct platform_device *pdev;
-	struct sdw_intel_link_res *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;
-
-	/* 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 */
-	if (ret) {
-		dev_err(&adev->dev,
-			"Failed to read mipi-sdw-master-count: %d\n", ret);
-		count = SDW_MAX_LINKS;
-	}
-
-	/* 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;
-	} else if (!count) {
-		dev_warn(&adev->dev, "No SoundWire links detected\n");
-		return NULL;
-	}
-
-	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);
-	if (!ctx->links)
-		goto link_err;
-
-	link = ctx->links;
-
-	/* 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++;
-			continue;
-		}
-
-		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->ops = res->ops;
-		link->dev = res->dev;
-
-		memset(&pdevinfo, 0, sizeof(pdevinfo));
-
-		pdevinfo.parent = res->parent;
-		pdevinfo.name = "int-sdw";
-		pdevinfo.id = i;
-		pdevinfo.fwnode = acpi_fwnode_handle(adev);
-
-		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;
-		}
-
-		link->pdev = pdev;
-		link++;
-	}
-
-	return ctx;
-
-pdev_err:
-	sdw_intel_cleanup_pdev(ctx);
-link_err:
-	kfree(ctx);
-	return NULL;
-}
-
-static acpi_status sdw_intel_acpi_cb(acpi_handle handle, u32 level,
-				     void *cdata, void **return_value)
-{
-	struct sdw_intel_res *res = cdata;
-	struct acpi_device *adev;
-	acpi_status status;
-	u64 adr;
-
-	status = acpi_evaluate_integer(handle, METHOD_NAME__ADR, NULL, &adr);
-	if (ACPI_FAILURE(status))
-		return AE_OK; /* keep going */
-
-	if (acpi_bus_get_device(handle, &adev)) {
-		pr_err("%s: Couldn't find ACPI handle\n", __func__);
-		return AE_NOT_FOUND;
-	}
-
-	res->handle = handle;
-
-	/*
-	 * On some Intel platforms, multiple children of the HDAS
-	 * device can be found, but only one of them is the SoundWire
-	 * controller. The SNDW device is always exposed with
-	 * Name(_ADR, 0x40000000), with bits 31..28 representing the
-	 * SoundWire link so filter accordingly
-	 */
-	if ((adr & GENMASK(31, 28)) >> 28 != SDW_LINK_TYPE)
-		return AE_OK; /* keep going */
-
-	/* device found, stop namespace walk */
-	return AE_CTRL_TERMINATE;
-}
-
-/**
- * sdw_intel_init() - SoundWire Intel init routine
- * @parent_handle: ACPI parent handle
- * @res: resource data
- *
- * This scans the namespace and creates SoundWire link controller devices
- * based on the info queried.
- */
-static void *sdw_intel_init(acpi_handle *parent_handle,
-			    struct sdw_intel_res *res)
-{
-	acpi_status status;
-
-	status = acpi_walk_namespace(ACPI_TYPE_DEVICE,
-				     parent_handle, 1,
-				     sdw_intel_acpi_cb,
-				     NULL, res, NULL);
-	if (ACPI_FAILURE(status))
-		return NULL;
-
-	return sdw_intel_add_controller(res);
-}
-
 /**
  * sdw_intel_exit() - SoundWire Intel exit
  * @arg: callback context
-- 
2.11.0


    

Sudip Mukherjee

Wang, Rander

Signed-off-by: Sudip Mukherjee sudipm.mukherjee@gmail.com

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