Commit 43218a1b authored Aug 01, 2014 by Jie Yang Committed by Rafael J. Wysocki Aug 01, 2014

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>

parent 64aa90f2

drivers/acpi/acpi_lpss.c

+10 −0

Original line number	Diff line number	Diff line
		@@ -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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