From: Mika Westerberg Date: Tue, 18 Jun 2013 13:51:35 +0000 (+0300) Subject: ACPI / LPSS: override SDIO private register space size from ACPI tables X-Git-Tag: firefly_0821_release~176^2~5788^2~15^2 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=958c4eb2aa325099ea1f54c7354e381e3d79f3ae;p=firefly-linux-kernel-4.4.55.git ACPI / LPSS: override SDIO private register space size from ACPI tables The SDIO device in Lynxpoint has its LTR registers reserved for a WiFi device (a child of the SDIO device) in the ACPI namespace even though those registers physically belong to the SDIO device itself. In order to be able to access the SDIO LTR registers from the ACPI LPSS driver for diagnostic purposes we need to use a size override for the SDIO private register space. Add a possibility to override the size of the private register space of an LPSS device provided by the ACPI tables in the ACPI LPSS driver and set the correct size for the SDIO device in there. [rjw: Changelog] Signed-off-by: Mika Westerberg Signed-off-by: Rafael J. Wysocki --- diff --git a/drivers/acpi/acpi_lpss.c b/drivers/acpi/acpi_lpss.c index bd9867f592b7..a4e8c0337a59 100644 --- a/drivers/acpi/acpi_lpss.c +++ b/drivers/acpi/acpi_lpss.c @@ -48,6 +48,7 @@ struct lpss_device_desc { const char *clkdev_name; bool ltr_required; unsigned int prv_offset; + size_t prv_size_override; bool clk_gate; struct lpss_shared_clock *shared_clock; void (*setup)(struct lpss_private_data *pdata); @@ -91,6 +92,7 @@ static struct lpss_device_desc lpt_uart_dev_desc = { static struct lpss_device_desc lpt_sdio_dev_desc = { .prv_offset = 0x1000, + .prv_size_override = 0x1018, .ltr_required = true, }; @@ -249,7 +251,10 @@ static int acpi_lpss_create_device(struct acpi_device *adev, list_for_each_entry(rentry, &resource_list, node) if (resource_type(&rentry->res) == IORESOURCE_MEM) { - pdata->mmio_size = resource_size(&rentry->res); + if (dev_desc->prv_size_override) + pdata->mmio_size = dev_desc->prv_size_override; + else + pdata->mmio_size = resource_size(&rentry->res); pdata->mmio_base = ioremap(rentry->res.start, pdata->mmio_size); pdata->dev_desc = dev_desc;