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SubjectRe: [PATCH] ACPI / LPSS: override SDIO device's private register space size
Date
On Tuesday, June 18, 2013 04:51:35 PM Mika Westerberg wrote:
> The SDIO device in Lynxpoint has its LTR registers allocated for a WiFi
> device (a child of the SDIO device) instead in ACPI namespace even though
> they physically belong to the SDIO device. In order to be able to access
> the LTR registers from the ACPI LPSS driver for diagnostic purposes we need
> to enlarge size of this private register space.
>
> Work around this by adding a possibility to override size of the private
> register space in the ACPI LPSS driver and set correct size for the SDIO
> device.
>
> Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
> ---
> Applies on top of https://patchwork.kernel.org/patch/2742521/ (ACPI / LPSS:
> Power up LPSS devices during enumeration)

Queued up for 3.11.

Thanks,
Rafael


> drivers/acpi/acpi_lpss.c | 7 ++++++-
> 1 file changed, 6 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/acpi/acpi_lpss.c b/drivers/acpi/acpi_lpss.c
> index a14d997..539aeae 100644
> --- a/drivers/acpi/acpi_lpss.c
> +++ b/drivers/acpi/acpi_lpss.c
> @@ -44,6 +44,7 @@ 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;
> };
> @@ -69,6 +70,7 @@ static struct lpss_device_desc lpt_dev_desc = {
>
> static struct lpss_device_desc lpt_sdio_dev_desc = {
> .prv_offset = 0x1000,
> + .prv_size_override = 0x1018,
> .ltr_required = true,
> };
>
> @@ -226,7 +228,10 @@ 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;
>
--
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.


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