ACPI / LPSS: add LPSS device for Wildcat Point PCH

INT3438 is the ADSP device on Wildcat Point platform
with 2 DW DMA engines built In. The DMA engines are
used for DSP FW loading and audio data transferring.
These DMA engine probing need the clock, without it,
probing may failed and can't go forward.

Add LPSS device "INT3438" for Wildcat Point PCH, to
provide clock for its ADSP DMA engine probing.

Signed-off-by: Jie Yang <yang.jie@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/drivers/acpi/acpi_lpss.c b/drivers/acpi/acpi_lpss.c
index 9cb65b0e7597287531144d876d9eaed132ae7b5a..ce06149088c5b5366cd4c87b67dfffdb793fc7a6 100644 (file)
--- a/drivers/acpi/acpi_lpss.c
+++ b/drivers/acpi/acpi_lpss.c
@@ -113,6 +113,14 @@ static void lpss_i2c_setup(struct lpss_private_data *pdata)
        writel(val, pdata->mmio_base + offset);
 }
 
+static struct lpss_device_desc wpt_dev_desc = {
+       .clk_required = true,
+       .prv_offset = 0x800,
+       .ltr_required = true,
+       .clk_divider = true,
+       .clk_gate = true,
+};
+
 static struct lpss_device_desc lpt_dev_desc = {
        .clk_required = true,
        .prv_offset = 0x800,
@@ -226,6 +234,8 @@ static const struct acpi_device_id acpi_lpss_device_ids[] = {
        { "INT3436", LPSS_ADDR(lpt_sdio_dev_desc) },
        { "INT3437", },
 
+       { "INT3438", LPSS_ADDR(wpt_dev_desc) },
+
        { }
 };