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Date: Sun, 26 Apr 2020 00:54:48 +0100
From: Sudip Mukherjee <sudipm.mukherjee@...il.com>
To: Vinod Koul <vkoul@...nel.org>,
Sanyog Kale <sanyog.r.kale@...el.com>,
Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
Cc: linux-kernel@...r.kernel.org, alsa-devel@...a-project.org,
Sudip Mukherjee <sudipm.mukherjee@...il.com>
Subject: [PATCH v2] soundwire: intel: Remove unused function
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@...il.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
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