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authorJie Yang <yang.jie@intel.com>2014-08-01 09:06:35 +0800
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2014-08-01 03:10:23 +0200
commit43218a1b3ba7c8e39d88b5c0a43841f0e3e17470 (patch)
tree720309d201f6aab19f62d7a067507893e9836a0d /drivers/acpi
parent64aa90f26c06e1cb2aacfb98a7d0eccfbd6c1a91 (diff)
downloadop-kernel-dev-43218a1b3ba7c8e39d88b5c0a43841f0e3e17470.zip
op-kernel-dev-43218a1b3ba7c8e39d88b5c0a43841f0e3e17470.tar.gz
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>
Diffstat (limited to 'drivers/acpi')
-rw-r--r--drivers/acpi/acpi_lpss.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/acpi/acpi_lpss.c b/drivers/acpi/acpi_lpss.c
index 9cb65b0..ce06149 100644
--- 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) },
+
{ }
};
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