mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-14 12:49:08 +00:00
Merge branch 'fixes' of git://git.infradead.org/users/vkoul/slave-dma
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:
commit
27a24cfa04
@ -38,7 +38,6 @@ acpi-y += processor_core.o
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acpi-y += ec.o
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acpi-y += ec.o
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acpi-$(CONFIG_ACPI_DOCK) += dock.o
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acpi-$(CONFIG_ACPI_DOCK) += dock.o
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acpi-y += pci_root.o pci_link.o pci_irq.o
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acpi-y += pci_root.o pci_link.o pci_irq.o
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acpi-y += csrt.o
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acpi-$(CONFIG_X86_INTEL_LPSS) += acpi_lpss.o
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acpi-$(CONFIG_X86_INTEL_LPSS) += acpi_lpss.o
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acpi-y += acpi_platform.o
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acpi-y += acpi_platform.o
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acpi-y += power.o
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acpi-y += power.o
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@ -35,11 +35,16 @@ ACPI_MODULE_NAME("acpi_lpss");
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struct lpss_device_desc {
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struct lpss_device_desc {
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bool clk_required;
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bool clk_required;
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const char *clk_parent;
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const char *clkdev_name;
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bool ltr_required;
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bool ltr_required;
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unsigned int prv_offset;
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unsigned int prv_offset;
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};
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};
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static struct lpss_device_desc lpss_dma_desc = {
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.clk_required = true,
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.clkdev_name = "hclk",
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};
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struct lpss_private_data {
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struct lpss_private_data {
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void __iomem *mmio_base;
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void __iomem *mmio_base;
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resource_size_t mmio_size;
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resource_size_t mmio_size;
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@ -49,7 +54,6 @@ struct lpss_private_data {
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static struct lpss_device_desc lpt_dev_desc = {
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static struct lpss_device_desc lpt_dev_desc = {
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.clk_required = true,
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.clk_required = true,
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.clk_parent = "lpss_clk",
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.prv_offset = 0x800,
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.prv_offset = 0x800,
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.ltr_required = true,
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.ltr_required = true,
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};
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};
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@ -60,6 +64,9 @@ static struct lpss_device_desc lpt_sdio_dev_desc = {
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};
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};
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static const struct acpi_device_id acpi_lpss_device_ids[] = {
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static const struct acpi_device_id acpi_lpss_device_ids[] = {
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/* Generic LPSS devices */
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{ "INTL9C60", (unsigned long)&lpss_dma_desc },
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/* Lynxpoint LPSS devices */
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/* Lynxpoint LPSS devices */
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{ "INT33C0", (unsigned long)&lpt_dev_desc },
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{ "INT33C0", (unsigned long)&lpt_dev_desc },
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{ "INT33C1", (unsigned long)&lpt_dev_desc },
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{ "INT33C1", (unsigned long)&lpt_dev_desc },
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@ -91,16 +98,27 @@ static int register_device_clock(struct acpi_device *adev,
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struct lpss_private_data *pdata)
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struct lpss_private_data *pdata)
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{
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{
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const struct lpss_device_desc *dev_desc = pdata->dev_desc;
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const struct lpss_device_desc *dev_desc = pdata->dev_desc;
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struct lpss_clk_data *clk_data;
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if (!lpss_clk_dev)
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if (!lpss_clk_dev)
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lpt_register_clock_device();
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lpt_register_clock_device();
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if (!dev_desc->clk_parent || !pdata->mmio_base
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clk_data = platform_get_drvdata(lpss_clk_dev);
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if (!clk_data)
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return -ENODEV;
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if (dev_desc->clkdev_name) {
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clk_register_clkdev(clk_data->clk, dev_desc->clkdev_name,
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dev_name(&adev->dev));
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return 0;
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}
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if (!pdata->mmio_base
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|| pdata->mmio_size < dev_desc->prv_offset + LPSS_CLK_SIZE)
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|| pdata->mmio_size < dev_desc->prv_offset + LPSS_CLK_SIZE)
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return -ENODATA;
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return -ENODATA;
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pdata->clk = clk_register_gate(NULL, dev_name(&adev->dev),
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pdata->clk = clk_register_gate(NULL, dev_name(&adev->dev),
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dev_desc->clk_parent, 0,
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clk_data->name, 0,
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pdata->mmio_base + dev_desc->prv_offset,
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pdata->mmio_base + dev_desc->prv_offset,
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0, 0, NULL);
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0, 0, NULL);
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if (IS_ERR(pdata->clk))
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if (IS_ERR(pdata->clk))
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@ -1,159 +0,0 @@
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/*
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* Support for Core System Resources Table (CSRT)
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*
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* Copyright (C) 2013, Intel Corporation
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* Authors: Mika Westerberg <mika.westerberg@linux.intel.com>
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* Andy Shevchenko <andriy.shevchenko@linux.intel.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#define pr_fmt(fmt) "ACPI: CSRT: " fmt
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#include <linux/acpi.h>
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#include <linux/device.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/sizes.h>
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ACPI_MODULE_NAME("CSRT");
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static int __init acpi_csrt_parse_shared_info(struct platform_device *pdev,
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const struct acpi_csrt_group *grp)
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{
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const struct acpi_csrt_shared_info *si;
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struct resource res[3];
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size_t nres;
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int ret;
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memset(res, 0, sizeof(res));
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nres = 0;
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si = (const struct acpi_csrt_shared_info *)&grp[1];
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/*
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* The peripherals that are listed on CSRT typically support only
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* 32-bit addresses so we only use the low part of MMIO base for
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* now.
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*/
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if (!si->mmio_base_high && si->mmio_base_low) {
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/*
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* There is no size of the memory resource in shared_info
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* so we assume that it is 4k here.
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*/
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res[nres].start = si->mmio_base_low;
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res[nres].end = res[0].start + SZ_4K - 1;
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res[nres++].flags = IORESOURCE_MEM;
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}
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if (si->gsi_interrupt) {
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int irq = acpi_register_gsi(NULL, si->gsi_interrupt,
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si->interrupt_mode,
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si->interrupt_polarity);
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res[nres].start = irq;
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res[nres].end = irq;
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res[nres++].flags = IORESOURCE_IRQ;
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}
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if (si->base_request_line || si->num_handshake_signals) {
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/*
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* We pass the driver a DMA resource describing the range
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||||||
* of request lines the device supports.
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*/
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res[nres].start = si->base_request_line;
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res[nres].end = res[nres].start + si->num_handshake_signals - 1;
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res[nres++].flags = IORESOURCE_DMA;
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}
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ret = platform_device_add_resources(pdev, res, nres);
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if (ret) {
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if (si->gsi_interrupt)
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acpi_unregister_gsi(si->gsi_interrupt);
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return ret;
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}
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return 0;
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}
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static int __init
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acpi_csrt_parse_resource_group(const struct acpi_csrt_group *grp)
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{
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struct platform_device *pdev;
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|
||||||
char vendor[5], name[16];
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||||||
int ret, i;
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|
||||||
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vendor[0] = grp->vendor_id;
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||||||
vendor[1] = grp->vendor_id >> 8;
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vendor[2] = grp->vendor_id >> 16;
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vendor[3] = grp->vendor_id >> 24;
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||||||
vendor[4] = '\0';
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||||||
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if (grp->shared_info_length != sizeof(struct acpi_csrt_shared_info))
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return -ENODEV;
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||||||
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||||||
snprintf(name, sizeof(name), "%s%04X", vendor, grp->device_id);
|
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||||||
pdev = platform_device_alloc(name, PLATFORM_DEVID_AUTO);
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|
||||||
if (!pdev)
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|
||||||
return -ENOMEM;
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|
||||||
|
|
||||||
/* Add resources based on the shared info */
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|
||||||
ret = acpi_csrt_parse_shared_info(pdev, grp);
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|
||||||
if (ret)
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|
||||||
goto fail;
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|
||||||
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||||||
ret = platform_device_add(pdev);
|
|
||||||
if (ret)
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|
||||||
goto fail;
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|
||||||
|
|
||||||
for (i = 0; i < pdev->num_resources; i++)
|
|
||||||
dev_dbg(&pdev->dev, "%pR\n", &pdev->resource[i]);
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|
||||||
|
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||||||
return 0;
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|
||||||
|
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||||||
fail:
|
|
||||||
platform_device_put(pdev);
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|
||||||
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);
|
|
||||||
}
|
|
||||||
}
|
|
@ -35,7 +35,6 @@ void acpi_pci_link_init(void);
|
|||||||
void acpi_pci_root_hp_init(void);
|
void acpi_pci_root_hp_init(void);
|
||||||
void acpi_platform_init(void);
|
void acpi_platform_init(void);
|
||||||
int acpi_sysfs_init(void);
|
int acpi_sysfs_init(void);
|
||||||
void acpi_csrt_init(void);
|
|
||||||
#ifdef CONFIG_ACPI_CONTAINER
|
#ifdef CONFIG_ACPI_CONTAINER
|
||||||
void acpi_container_init(void);
|
void acpi_container_init(void);
|
||||||
#else
|
#else
|
||||||
|
@ -2043,7 +2043,6 @@ int __init acpi_scan_init(void)
|
|||||||
acpi_pci_link_init();
|
acpi_pci_link_init();
|
||||||
acpi_platform_init();
|
acpi_platform_init();
|
||||||
acpi_lpss_init();
|
acpi_lpss_init();
|
||||||
acpi_csrt_init();
|
|
||||||
acpi_container_init();
|
acpi_container_init();
|
||||||
acpi_memory_hotplug_init();
|
acpi_memory_hotplug_init();
|
||||||
|
|
||||||
|
@ -15,22 +15,29 @@
|
|||||||
#include <linux/clk-provider.h>
|
#include <linux/clk-provider.h>
|
||||||
#include <linux/err.h>
|
#include <linux/err.h>
|
||||||
#include <linux/module.h>
|
#include <linux/module.h>
|
||||||
|
#include <linux/platform_data/clk-lpss.h>
|
||||||
#include <linux/platform_device.h>
|
#include <linux/platform_device.h>
|
||||||
|
|
||||||
#define PRV_CLOCK_PARAMS 0x800
|
#define PRV_CLOCK_PARAMS 0x800
|
||||||
|
|
||||||
static int lpt_clk_probe(struct platform_device *pdev)
|
static int lpt_clk_probe(struct platform_device *pdev)
|
||||||
{
|
{
|
||||||
|
struct lpss_clk_data *drvdata;
|
||||||
struct clk *clk;
|
struct clk *clk;
|
||||||
|
|
||||||
|
drvdata = devm_kzalloc(&pdev->dev, sizeof(*drvdata), GFP_KERNEL);
|
||||||
|
if (!drvdata)
|
||||||
|
return -ENOMEM;
|
||||||
|
|
||||||
/* LPSS free running clock */
|
/* LPSS free running clock */
|
||||||
clk = clk_register_fixed_rate(&pdev->dev, "lpss_clk", NULL, CLK_IS_ROOT,
|
drvdata->name = "lpss_clk";
|
||||||
100000000);
|
clk = clk_register_fixed_rate(&pdev->dev, drvdata->name, NULL,
|
||||||
|
CLK_IS_ROOT, 100000000);
|
||||||
if (IS_ERR(clk))
|
if (IS_ERR(clk))
|
||||||
return PTR_ERR(clk);
|
return PTR_ERR(clk);
|
||||||
|
|
||||||
/* Shared DMA clock */
|
drvdata->clk = clk;
|
||||||
clk_register_clkdev(clk, "hclk", "INTL9C60.0.auto");
|
platform_set_drvdata(pdev, drvdata);
|
||||||
return 0;
|
return 0;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
@ -4,7 +4,8 @@
|
|||||||
* Based on of-dma.c
|
* Based on of-dma.c
|
||||||
*
|
*
|
||||||
* Copyright (C) 2013, Intel Corporation
|
* Copyright (C) 2013, Intel Corporation
|
||||||
* Author: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
|
* Authors: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
|
||||||
|
* Mika Westerberg <mika.westerberg@linux.intel.com>
|
||||||
*
|
*
|
||||||
* This program is free software; you can redistribute it and/or modify
|
* 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
|
* it under the terms of the GNU General Public License version 2 as
|
||||||
@ -16,12 +17,124 @@
|
|||||||
#include <linux/list.h>
|
#include <linux/list.h>
|
||||||
#include <linux/mutex.h>
|
#include <linux/mutex.h>
|
||||||
#include <linux/slab.h>
|
#include <linux/slab.h>
|
||||||
|
#include <linux/ioport.h>
|
||||||
#include <linux/acpi.h>
|
#include <linux/acpi.h>
|
||||||
#include <linux/acpi_dma.h>
|
#include <linux/acpi_dma.h>
|
||||||
|
|
||||||
static LIST_HEAD(acpi_dma_list);
|
static LIST_HEAD(acpi_dma_list);
|
||||||
static DEFINE_MUTEX(acpi_dma_lock);
|
static DEFINE_MUTEX(acpi_dma_lock);
|
||||||
|
|
||||||
|
/**
|
||||||
|
* acpi_dma_parse_resource_group - match device and parse resource group
|
||||||
|
* @grp: CSRT resource group
|
||||||
|
* @adev: ACPI device to match with
|
||||||
|
* @adma: struct acpi_dma of the given DMA controller
|
||||||
|
*
|
||||||
|
* Returns 1 on success, 0 when no information is available, or appropriate
|
||||||
|
* errno value on error.
|
||||||
|
*
|
||||||
|
* In order to match a device from DSDT table to the corresponding CSRT device
|
||||||
|
* we use MMIO address and IRQ.
|
||||||
|
*/
|
||||||
|
static int acpi_dma_parse_resource_group(const struct acpi_csrt_group *grp,
|
||||||
|
struct acpi_device *adev, struct acpi_dma *adma)
|
||||||
|
{
|
||||||
|
const struct acpi_csrt_shared_info *si;
|
||||||
|
struct list_head resource_list;
|
||||||
|
struct resource_list_entry *rentry;
|
||||||
|
resource_size_t mem = 0, irq = 0;
|
||||||
|
u32 vendor_id;
|
||||||
|
int ret;
|
||||||
|
|
||||||
|
if (grp->shared_info_length != sizeof(struct acpi_csrt_shared_info))
|
||||||
|
return -ENODEV;
|
||||||
|
|
||||||
|
INIT_LIST_HEAD(&resource_list);
|
||||||
|
ret = acpi_dev_get_resources(adev, &resource_list, NULL, NULL);
|
||||||
|
if (ret <= 0)
|
||||||
|
return 0;
|
||||||
|
|
||||||
|
list_for_each_entry(rentry, &resource_list, node) {
|
||||||
|
if (resource_type(&rentry->res) == IORESOURCE_MEM)
|
||||||
|
mem = rentry->res.start;
|
||||||
|
else if (resource_type(&rentry->res) == IORESOURCE_IRQ)
|
||||||
|
irq = rentry->res.start;
|
||||||
|
}
|
||||||
|
|
||||||
|
acpi_dev_free_resource_list(&resource_list);
|
||||||
|
|
||||||
|
/* Consider initial zero values as resource not found */
|
||||||
|
if (mem == 0 && irq == 0)
|
||||||
|
return 0;
|
||||||
|
|
||||||
|
si = (const struct acpi_csrt_shared_info *)&grp[1];
|
||||||
|
|
||||||
|
/* Match device by MMIO and IRQ */
|
||||||
|
if (si->mmio_base_low != mem || si->gsi_interrupt != irq)
|
||||||
|
return 0;
|
||||||
|
|
||||||
|
vendor_id = le32_to_cpu(grp->vendor_id);
|
||||||
|
dev_dbg(&adev->dev, "matches with %.4s%04X (rev %u)\n",
|
||||||
|
(char *)&vendor_id, grp->device_id, grp->revision);
|
||||||
|
|
||||||
|
/* Check if the request line range is available */
|
||||||
|
if (si->base_request_line == 0 && si->num_handshake_signals == 0)
|
||||||
|
return 0;
|
||||||
|
|
||||||
|
adma->base_request_line = si->base_request_line;
|
||||||
|
adma->end_request_line = si->base_request_line +
|
||||||
|
si->num_handshake_signals - 1;
|
||||||
|
|
||||||
|
dev_dbg(&adev->dev, "request line base: 0x%04x end: 0x%04x\n",
|
||||||
|
adma->base_request_line, adma->end_request_line);
|
||||||
|
|
||||||
|
return 1;
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* acpi_dma_parse_csrt - parse CSRT to exctract additional DMA resources
|
||||||
|
* @adev: ACPI device to match with
|
||||||
|
* @adma: struct acpi_dma of the given DMA controller
|
||||||
|
*
|
||||||
|
* 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 are using this table to get the request line range of the specific DMA
|
||||||
|
* controller to be used later.
|
||||||
|
*
|
||||||
|
*/
|
||||||
|
static void acpi_dma_parse_csrt(struct acpi_device *adev, struct acpi_dma *adma)
|
||||||
|
{
|
||||||
|
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)
|
||||||
|
dev_warn(&adev->dev, "failed to get the CSRT table\n");
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
grp = (struct acpi_csrt_group *)(csrt + 1);
|
||||||
|
end = (struct acpi_csrt_group *)((void *)csrt + csrt->header.length);
|
||||||
|
|
||||||
|
while (grp < end) {
|
||||||
|
ret = acpi_dma_parse_resource_group(grp, adev, adma);
|
||||||
|
if (ret < 0) {
|
||||||
|
dev_warn(&adev->dev,
|
||||||
|
"error in parsing resource group\n");
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
grp = (struct acpi_csrt_group *)((void *)grp + grp->length);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
/**
|
/**
|
||||||
* acpi_dma_controller_register - Register a DMA controller to ACPI DMA helpers
|
* acpi_dma_controller_register - Register a DMA controller to ACPI DMA helpers
|
||||||
* @dev: struct device of DMA controller
|
* @dev: struct device of DMA controller
|
||||||
@ -61,6 +174,8 @@ int acpi_dma_controller_register(struct device *dev,
|
|||||||
adma->acpi_dma_xlate = acpi_dma_xlate;
|
adma->acpi_dma_xlate = acpi_dma_xlate;
|
||||||
adma->data = data;
|
adma->data = data;
|
||||||
|
|
||||||
|
acpi_dma_parse_csrt(adev, adma);
|
||||||
|
|
||||||
/* Now queue acpi_dma controller structure in list */
|
/* Now queue acpi_dma controller structure in list */
|
||||||
mutex_lock(&acpi_dma_lock);
|
mutex_lock(&acpi_dma_lock);
|
||||||
list_add_tail(&adma->dma_controllers, &acpi_dma_list);
|
list_add_tail(&adma->dma_controllers, &acpi_dma_list);
|
||||||
@ -149,6 +264,45 @@ void devm_acpi_dma_controller_free(struct device *dev)
|
|||||||
}
|
}
|
||||||
EXPORT_SYMBOL_GPL(devm_acpi_dma_controller_free);
|
EXPORT_SYMBOL_GPL(devm_acpi_dma_controller_free);
|
||||||
|
|
||||||
|
/**
|
||||||
|
* acpi_dma_update_dma_spec - prepare dma specifier to pass to translation function
|
||||||
|
* @adma: struct acpi_dma of DMA controller
|
||||||
|
* @dma_spec: dma specifier to update
|
||||||
|
*
|
||||||
|
* Returns 0, if no information is avaiable, -1 on mismatch, and 1 otherwise.
|
||||||
|
*
|
||||||
|
* Accordingly to ACPI 5.0 Specification Table 6-170 "Fixed DMA Resource
|
||||||
|
* Descriptor":
|
||||||
|
* DMA Request Line bits is a platform-relative number uniquely
|
||||||
|
* identifying the request line assigned. Request line-to-Controller
|
||||||
|
* mapping is done in a controller-specific OS driver.
|
||||||
|
* That's why we can safely adjust slave_id when the appropriate controller is
|
||||||
|
* found.
|
||||||
|
*/
|
||||||
|
static int acpi_dma_update_dma_spec(struct acpi_dma *adma,
|
||||||
|
struct acpi_dma_spec *dma_spec)
|
||||||
|
{
|
||||||
|
/* Set link to the DMA controller device */
|
||||||
|
dma_spec->dev = adma->dev;
|
||||||
|
|
||||||
|
/* Check if the request line range is available */
|
||||||
|
if (adma->base_request_line == 0 && adma->end_request_line == 0)
|
||||||
|
return 0;
|
||||||
|
|
||||||
|
/* Check if slave_id falls to the range */
|
||||||
|
if (dma_spec->slave_id < adma->base_request_line ||
|
||||||
|
dma_spec->slave_id > adma->end_request_line)
|
||||||
|
return -1;
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Here we adjust slave_id. It should be a relative number to the base
|
||||||
|
* request line.
|
||||||
|
*/
|
||||||
|
dma_spec->slave_id -= adma->base_request_line;
|
||||||
|
|
||||||
|
return 1;
|
||||||
|
}
|
||||||
|
|
||||||
struct acpi_dma_parser_data {
|
struct acpi_dma_parser_data {
|
||||||
struct acpi_dma_spec dma_spec;
|
struct acpi_dma_spec dma_spec;
|
||||||
size_t index;
|
size_t index;
|
||||||
@ -193,6 +347,7 @@ struct dma_chan *acpi_dma_request_slave_chan_by_index(struct device *dev,
|
|||||||
struct acpi_device *adev;
|
struct acpi_device *adev;
|
||||||
struct acpi_dma *adma;
|
struct acpi_dma *adma;
|
||||||
struct dma_chan *chan = NULL;
|
struct dma_chan *chan = NULL;
|
||||||
|
int found;
|
||||||
|
|
||||||
/* Check if the device was enumerated by ACPI */
|
/* Check if the device was enumerated by ACPI */
|
||||||
if (!dev || !ACPI_HANDLE(dev))
|
if (!dev || !ACPI_HANDLE(dev))
|
||||||
@ -219,9 +374,20 @@ struct dma_chan *acpi_dma_request_slave_chan_by_index(struct device *dev,
|
|||||||
mutex_lock(&acpi_dma_lock);
|
mutex_lock(&acpi_dma_lock);
|
||||||
|
|
||||||
list_for_each_entry(adma, &acpi_dma_list, dma_controllers) {
|
list_for_each_entry(adma, &acpi_dma_list, dma_controllers) {
|
||||||
dma_spec->dev = adma->dev;
|
/*
|
||||||
|
* We are not going to call translation function if slave_id
|
||||||
|
* doesn't fall to the request range.
|
||||||
|
*/
|
||||||
|
found = acpi_dma_update_dma_spec(adma, dma_spec);
|
||||||
|
if (found < 0)
|
||||||
|
continue;
|
||||||
chan = adma->acpi_dma_xlate(dma_spec, adma);
|
chan = adma->acpi_dma_xlate(dma_spec, adma);
|
||||||
if (chan)
|
/*
|
||||||
|
* Try to get a channel only from the DMA controller that
|
||||||
|
* matches the slave_id. See acpi_dma_update_dma_spec()
|
||||||
|
* description for the details.
|
||||||
|
*/
|
||||||
|
if (found > 0 || chan)
|
||||||
break;
|
break;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
@ -37,6 +37,8 @@ struct acpi_dma_spec {
|
|||||||
* @dev: struct device of this controller
|
* @dev: struct device of this controller
|
||||||
* @acpi_dma_xlate: callback function to find a suitable channel
|
* @acpi_dma_xlate: callback function to find a suitable channel
|
||||||
* @data: private data used by a callback function
|
* @data: private data used by a callback function
|
||||||
|
* @base_request_line: first supported request line (CSRT)
|
||||||
|
* @end_request_line: last supported request line (CSRT)
|
||||||
*/
|
*/
|
||||||
struct acpi_dma {
|
struct acpi_dma {
|
||||||
struct list_head dma_controllers;
|
struct list_head dma_controllers;
|
||||||
@ -44,6 +46,8 @@ struct acpi_dma {
|
|||||||
struct dma_chan *(*acpi_dma_xlate)
|
struct dma_chan *(*acpi_dma_xlate)
|
||||||
(struct acpi_dma_spec *, struct acpi_dma *);
|
(struct acpi_dma_spec *, struct acpi_dma *);
|
||||||
void *data;
|
void *data;
|
||||||
|
unsigned short base_request_line;
|
||||||
|
unsigned short end_request_line;
|
||||||
};
|
};
|
||||||
|
|
||||||
/* Used with acpi_dma_simple_xlate() */
|
/* Used with acpi_dma_simple_xlate() */
|
||||||
|
@ -13,6 +13,11 @@
|
|||||||
#ifndef __CLK_LPSS_H
|
#ifndef __CLK_LPSS_H
|
||||||
#define __CLK_LPSS_H
|
#define __CLK_LPSS_H
|
||||||
|
|
||||||
|
struct lpss_clk_data {
|
||||||
|
const char *name;
|
||||||
|
struct clk *clk;
|
||||||
|
};
|
||||||
|
|
||||||
extern int lpt_clk_init(void);
|
extern int lpt_clk_init(void);
|
||||||
|
|
||||||
#endif /* __CLK_LPSS_H */
|
#endif /* __CLK_LPSS_H */
|
||||||
|
Loading…
Reference in New Issue
Block a user