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Merge branch 'fixes' of git://git.infradead.org/users/vkoul/slave-dma

Browse source 
Pull slave-dma fixes from Vinod Koul:
 "We have two patches from Andy & Rafael fixing the Lynxpoint dma"

* 'fixes' of git://git.infradead.org/users/vkoul/slave-dma:
  ACPI / LPSS: register clock device for Lynxpoint DMA properly
  dma: acpi-dma: parse CSRT to extract additional resources
This commit is contained in:
Linus Torvalds 2013-05-25 20:30:31 -07:00
commit 27a24cfa04
9 changed files with 211 additions and 173 deletions
Download patch file Download diff file Expand all files Collapse all files

1
drivers/acpi/Makefile
View file

@ -38,7 +38,6 @@ acpi-y += processor_core.o
acpi-y += ec.o
acpi-$(CONFIG_ACPI_DOCK) += dock.o
acpi-y += pci_root.o pci_link.o pci_irq.o
acpi-y += csrt.o
acpi-$(CONFIG_X86_INTEL_LPSS) += acpi_lpss.o
acpi-y += acpi_platform.o
acpi-y += power.o

26
drivers/acpi/acpi_lpss.c
View file

@ -35,11 +35,16 @@ ACPI_MODULE_NAME("acpi_lpss");
struct lpss_device_desc {
bool clk_required;
const char *clk_parent;
const char *clkdev_name;
bool ltr_required;
unsigned int prv_offset;
};
static struct lpss_device_desc lpss_dma_desc = {
.clk_required = true,
.clkdev_name = "hclk",
};
struct lpss_private_data {
void __iomem *mmio_base;
resource_size_t mmio_size;
@ -49,7 +54,6 @@ struct lpss_private_data {
static struct lpss_device_desc lpt_dev_desc = {
.clk_required = true,
.clk_parent = "lpss_clk",
.prv_offset = 0x800,
.ltr_required = true,
};
@ -60,6 +64,9 @@ static struct lpss_device_desc lpt_sdio_dev_desc = {
};
static const struct acpi_device_id acpi_lpss_device_ids[] = {
/* Generic LPSS devices */
{ "INTL9C60", (unsigned long)&lpss_dma_desc },
/* Lynxpoint LPSS devices */
{ "INT33C0", (unsigned long)&lpt_dev_desc },
{ "INT33C1", (unsigned long)&lpt_dev_desc },
@ -91,16 +98,27 @@ static int register_device_clock(struct acpi_device *adev,
struct lpss_private_data *pdata)
{
const struct lpss_device_desc *dev_desc = pdata->dev_desc;
struct lpss_clk_data *clk_data;
if (!lpss_clk_dev)
lpt_register_clock_device();
if (!dev_desc->clk_parent || !pdata->mmio_base
clk_data = platform_get_drvdata(lpss_clk_dev);
if (!clk_data)
return -ENODEV;
if (dev_desc->clkdev_name) {
clk_register_clkdev(clk_data->clk, dev_desc->clkdev_name,
dev_name(&adev->dev));
return 0;
}
if (!pdata->mmio_base
|| pdata->mmio_size < dev_desc->prv_offset + LPSS_CLK_SIZE)
return -ENODATA;
pdata->clk = clk_register_gate(NULL, dev_name(&adev->dev),
dev_desc->clk_parent, 0,
clk_data->name, 0,
pdata->mmio_base + dev_desc->prv_offset,
0, 0, NULL);
if (IS_ERR(pdata->clk))

159
drivers/acpi/csrt.c
View file

@ -1,159 +0,0 @@
/*
* Support for Core System Resources Table (CSRT)
*
* Copyright (C) 2013, Intel Corporation
* Authors: Mika Westerberg <mika.westerberg@linux.intel.com>
* Andy Shevchenko <andriy.shevchenko@linux.intel.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#define pr_fmt(fmt) "ACPI: CSRT: " fmt
#include <linux/acpi.h>
#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/sizes.h>
ACPI_MODULE_NAME("CSRT");
static int __init acpi_csrt_parse_shared_info(struct platform_device *pdev,
const struct acpi_csrt_group *grp)
{
const struct acpi_csrt_shared_info *si;
struct resource res[3];
size_t nres;
int ret;
memset(res, 0, sizeof(res));
nres = 0;
si = (const struct acpi_csrt_shared_info *)&grp[1];
/*
* The peripherals that are listed on CSRT typically support only
* 32-bit addresses so we only use the low part of MMIO base for
* now.
*/
if (!si->mmio_base_high && si->mmio_base_low) {
/*
* There is no size of the memory resource in shared_info
* so we assume that it is 4k here.
*/
res[nres].start = si->mmio_base_low;
res[nres].end = res[0].start + SZ_4K - 1;
res[nres++].flags = IORESOURCE_MEM;
}
if (si->gsi_interrupt) {
int irq = acpi_register_gsi(NULL, si->gsi_interrupt,
si->interrupt_mode,
si->interrupt_polarity);
res[nres].start = irq;
res[nres].end = irq;
res[nres++].flags = IORESOURCE_IRQ;
}
if (si->base_request_line || si->num_handshake_signals) {
/*
* We pass the driver a DMA resource describing the range
* of request lines the device supports.
*/
res[nres].start = si->base_request_line;
res[nres].end = res[nres].start + si->num_handshake_signals - 1;
res[nres++].flags = IORESOURCE_DMA;
}
ret = platform_device_add_resources(pdev, res, nres);
if (ret) {
if (si->gsi_interrupt)
acpi_unregister_gsi(si->gsi_interrupt);
return ret;
}
return 0;
}
static int __init
acpi_csrt_parse_resource_group(const struct acpi_csrt_group *grp)
{
struct platform_device *pdev;
char vendor[5], name[16];
int ret, i;
vendor[0] = grp->vendor_id;
vendor[1] = grp->vendor_id >> 8;
vendor[2] = grp->vendor_id >> 16;
vendor[3] = grp->vendor_id >> 24;
vendor[4] = '\0';
if (grp->shared_info_length != sizeof(struct acpi_csrt_shared_info))
return -ENODEV;
snprintf(name, sizeof(name), "%s%04X", vendor, grp->device_id);
pdev = platform_device_alloc(name, PLATFORM_DEVID_AUTO);
if (!pdev)
return -ENOMEM;
/* Add resources based on the shared info */
ret = acpi_csrt_parse_shared_info(pdev, grp);
if (ret)
goto fail;
ret = platform_device_add(pdev);
if (ret)
goto fail;
for (i = 0; i < pdev->num_resources; i++)
dev_dbg(&pdev->dev, "%pR\n", &pdev->resource[i]);
return 0;
fail:
platform_device_put(pdev);
return ret;
}
/*
* CSRT or Core System Resources Table is a proprietary ACPI table
* introduced by Microsoft. This table can contain devices that are not in
* the system DSDT table. In particular DMA controllers might be described
* here.
*
* We present these devices as normal platform devices that don't have ACPI
* IDs or handle. The platform device name will be something like
* <VENDOR><DEVID>.<n>.auto for example: INTL9C06.0.auto.
*/
void __init acpi_csrt_init(void)
{
struct acpi_csrt_group *grp, *end;
struct acpi_table_csrt *csrt;
acpi_status status;
int ret;
status = acpi_get_table(ACPI_SIG_CSRT, 0,
(struct acpi_table_header **)&csrt);
if (ACPI_FAILURE(status)) {
if (status != AE_NOT_FOUND)
pr_warn("failed to get the CSRT table\n");
return;
}
pr_debug("parsing CSRT table for devices\n");
grp = (struct acpi_csrt_group *)(csrt + 1);
end = (struct acpi_csrt_group *)((void *)csrt + csrt->header.length);
while (grp < end) {
ret = acpi_csrt_parse_resource_group(grp);
if (ret) {
pr_warn("error in parsing resource group: %d\n", ret);
return;
}
grp = (struct acpi_csrt_group *)((void *)grp + grp->length);
}
}

1
drivers/acpi/internal.h
View file

@ -35,7 +35,6 @@ void acpi_pci_link_init(void);
void acpi_pci_root_hp_init(void);
void acpi_platform_init(void);
int acpi_sysfs_init(void);
void acpi_csrt_init(void);
#ifdef CONFIG_ACPI_CONTAINER
void acpi_container_init(void);
#else

1
drivers/acpi/scan.c
View file

@ -2043,7 +2043,6 @@ int __init acpi_scan_init(void)
acpi_pci_link_init();
acpi_platform_init();
acpi_lpss_init();
acpi_csrt_init();
acpi_container_init();
acpi_memory_hotplug_init();