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linux/drivers/mfd/intel-lpss.c
Stephen Boyd 62e59c4e69 clk: Remove io.h from clk-provider.h 
Now that we've gotten rid of clk_readl() we can remove io.h from the
clk-provider header and push out the io.h include to any code that isn't
already including the io.h header but using things like readl/writel,
etc.

Found with this grep:

  git grep -l clk-provider.h | grep '.c$' | xargs git grep -L 'linux/io.h' | \
  	xargs git grep -l \
	-e '\<__iowrite32_copy\>' --or \
	-e '\<__ioread32_copy\>' --or \
	-e '\<__iowrite64_copy\>' --or \
	-e '\<ioremap_page_range\>' --or \
	-e '\<ioremap_huge_init\>' --or \
	-e '\<arch_ioremap_pud_supported\>' --or \
	-e '\<arch_ioremap_pmd_supported\>' --or \
	-e '\<devm_ioport_map\>' --or \
	-e '\<devm_ioport_unmap\>' --or \
	-e '\<IOMEM_ERR_PTR\>' --or \
	-e '\<devm_ioremap\>' --or \
	-e '\<devm_ioremap_nocache\>' --or \
	-e '\<devm_ioremap_wc\>' --or \
	-e '\<devm_iounmap\>' --or \
	-e '\<devm_ioremap_release\>' --or \
	-e '\<devm_memremap\>' --or \
	-e '\<devm_memunmap\>' --or \
	-e '\<__devm_memremap_pages\>' --or \
	-e '\<pci_remap_cfgspace\>' --or \
	-e '\<arch_has_dev_port\>' --or \
	-e '\<arch_phys_wc_add\>' --or \
	-e '\<arch_phys_wc_del\>' --or \
	-e '\<memremap\>' --or \
	-e '\<memunmap\>' --or \
	-e '\<arch_io_reserve_memtype_wc\>' --or \
	-e '\<arch_io_free_memtype_wc\>' --or \
	-e '\<__io_aw\>' --or \
	-e '\<__io_pbw\>' --or \
	-e '\<__io_paw\>' --or \
	-e '\<__io_pbr\>' --or \
	-e '\<__io_par\>' --or \
	-e '\<__raw_readb\>' --or \
	-e '\<__raw_readw\>' --or \
	-e '\<__raw_readl\>' --or \
	-e '\<__raw_readq\>' --or \
	-e '\<__raw_writeb\>' --or \
	-e '\<__raw_writew\>' --or \
	-e '\<__raw_writel\>' --or \
	-e '\<__raw_writeq\>' --or \
	-e '\<readb\>' --or \
	-e '\<readw\>' --or \
	-e '\<readl\>' --or \
	-e '\<readq\>' --or \
	-e '\<writeb\>' --or \
	-e '\<writew\>' --or \
	-e '\<writel\>' --or \
	-e '\<writeq\>' --or \
	-e '\<readb_relaxed\>' --or \
	-e '\<readw_relaxed\>' --or \
	-e '\<readl_relaxed\>' --or \
	-e '\<readq_relaxed\>' --or \
	-e '\<writeb_relaxed\>' --or \
	-e '\<writew_relaxed\>' --or \
	-e '\<writel_relaxed\>' --or \
	-e '\<writeq_relaxed\>' --or \
	-e '\<readsb\>' --or \
	-e '\<readsw\>' --or \
	-e '\<readsl\>' --or \
	-e '\<readsq\>' --or \
	-e '\<writesb\>' --or \
	-e '\<writesw\>' --or \
	-e '\<writesl\>' --or \
	-e '\<writesq\>' --or \
	-e '\<inb\>' --or \
	-e '\<inw\>' --or \
	-e '\<inl\>' --or \
	-e '\<outb\>' --or \
	-e '\<outw\>' --or \
	-e '\<outl\>' --or \
	-e '\<inb_p\>' --or \
	-e '\<inw_p\>' --or \
	-e '\<inl_p\>' --or \
	-e '\<outb_p\>' --or \
	-e '\<outw_p\>' --or \
	-e '\<outl_p\>' --or \
	-e '\<insb\>' --or \
	-e '\<insw\>' --or \
	-e '\<insl\>' --or \
	-e '\<outsb\>' --or \
	-e '\<outsw\>' --or \
	-e '\<outsl\>' --or \
	-e '\<insb_p\>' --or \
	-e '\<insw_p\>' --or \
	-e '\<insl_p\>' --or \
	-e '\<outsb_p\>' --or \
	-e '\<outsw_p\>' --or \
	-e '\<outsl_p\>' --or \
	-e '\<ioread8\>' --or \
	-e '\<ioread16\>' --or \
	-e '\<ioread32\>' --or \
	-e '\<ioread64\>' --or \
	-e '\<iowrite8\>' --or \
	-e '\<iowrite16\>' --or \
	-e '\<iowrite32\>' --or \
	-e '\<iowrite64\>' --or \
	-e '\<ioread16be\>' --or \
	-e '\<ioread32be\>' --or \
	-e '\<ioread64be\>' --or \
	-e '\<iowrite16be\>' --or \
	-e '\<iowrite32be\>' --or \
	-e '\<iowrite64be\>' --or \
	-e '\<ioread8_rep\>' --or \
	-e '\<ioread16_rep\>' --or \
	-e '\<ioread32_rep\>' --or \
	-e '\<ioread64_rep\>' --or \
	-e '\<iowrite8_rep\>' --or \
	-e '\<iowrite16_rep\>' --or \
	-e '\<iowrite32_rep\>' --or \
	-e '\<iowrite64_rep\>' --or \
	-e '\<__io_virt\>' --or \
	-e '\<pci_iounmap\>' --or \
	-e '\<virt_to_phys\>' --or \
	-e '\<phys_to_virt\>' --or \
	-e '\<ioremap_uc\>' --or \
	-e '\<ioremap\>' --or \
	-e '\<__ioremap\>' --or \
	-e '\<iounmap\>' --or \
	-e '\<ioremap\>' --or \
	-e '\<ioremap_nocache\>' --or \
	-e '\<ioremap_uc\>' --or \
	-e '\<ioremap_wc\>' --or \
	-e '\<ioremap_wc\>' --or \
	-e '\<ioremap_wt\>' --or \
	-e '\<ioport_map\>' --or \
	-e '\<ioport_unmap\>' --or \
	-e '\<ioport_map\>' --or \
	-e '\<ioport_unmap\>' --or \
	-e '\<xlate_dev_kmem_ptr\>' --or \
	-e '\<xlate_dev_mem_ptr\>' --or \
	-e '\<unxlate_dev_mem_ptr\>' --or \
	-e '\<virt_to_bus\>' --or \
	-e '\<bus_to_virt\>' --or \
	-e '\<memset_io\>' --or \
	-e '\<memcpy_fromio\>' --or \
	-e '\<memcpy_toio\>'

I also reordered a couple includes when they weren't alphabetical and
removed clk.h from kona, replacing it with clk-provider.h because
that driver doesn't use clk consumer APIs.

Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Chen-Yu Tsai <wens@csie.org>
Acked-by: Maxime Ripard <maxime.ripard@bootlin.com>
Acked-by: Tero Kristo <t-kristo@ti.com>
Acked-by: Sekhar Nori <nsekhar@ti.com>
Cc: Krzysztof Kozlowski <krzk@kernel.org>
Acked-by: Mark Brown <broonie@kernel.org>
Cc: Chris Zankel <chris@zankel.net>
Acked-by: Max Filippov <jcmvbkbc@gmail.com>
Acked-by: John Crispin <john@phrozen.org>
Acked-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2019-05-15 13:21:37 -07:00

556 lines
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C
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/*
* Intel Sunrisepoint LPSS core support.
*
* Copyright (C) 2015, Intel Corporation
*
* Authors: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
* Mika Westerberg <mika.westerberg@linux.intel.com>
* Heikki Krogerus <heikki.krogerus@linux.intel.com>
* Jarkko Nikula <jarkko.nikula@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.
*/
#include <linux/clk.h>
#include <linux/clkdev.h>
#include <linux/clk-provider.h>
#include <linux/debugfs.h>
#include <linux/idr.h>
#include <linux/io.h>
#include <linux/ioport.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mfd/core.h>
#include <linux/pm_qos.h>
#include <linux/pm_runtime.h>
#include <linux/property.h>
#include <linux/seq_file.h>
#include <linux/io-64-nonatomic-lo-hi.h>
#include "intel-lpss.h"
#define LPSS_DEV_OFFSET 0x000
#define LPSS_DEV_SIZE 0x200
#define LPSS_PRIV_OFFSET 0x200
#define LPSS_PRIV_SIZE 0x100
#define LPSS_PRIV_REG_COUNT (LPSS_PRIV_SIZE / 4)
#define LPSS_IDMA64_OFFSET 0x800
#define LPSS_IDMA64_SIZE 0x800
/* Offsets from lpss->priv */
#define LPSS_PRIV_RESETS 0x04
#define LPSS_PRIV_RESETS_IDMA BIT(2)
#define LPSS_PRIV_RESETS_FUNC 0x3
#define LPSS_PRIV_ACTIVELTR 0x10
#define LPSS_PRIV_IDLELTR 0x14
#define LPSS_PRIV_LTR_REQ BIT(15)
#define LPSS_PRIV_LTR_SCALE_MASK 0xc00
#define LPSS_PRIV_LTR_SCALE_1US 0x800
#define LPSS_PRIV_LTR_SCALE_32US 0xc00
#define LPSS_PRIV_LTR_VALUE_MASK 0x3ff
#define LPSS_PRIV_SSP_REG 0x20
#define LPSS_PRIV_SSP_REG_DIS_DMA_FIN BIT(0)
#define LPSS_PRIV_REMAP_ADDR 0x40
#define LPSS_PRIV_CAPS 0xfc
#define LPSS_PRIV_CAPS_NO_IDMA BIT(8)
#define LPSS_PRIV_CAPS_TYPE_SHIFT 4
#define LPSS_PRIV_CAPS_TYPE_MASK (0xf << LPSS_PRIV_CAPS_TYPE_SHIFT)
/* This matches the type field in CAPS register */
enum intel_lpss_dev_type {
LPSS_DEV_I2C = 0,
LPSS_DEV_UART,
LPSS_DEV_SPI,
};
struct intel_lpss {
const struct intel_lpss_platform_info *info;
enum intel_lpss_dev_type type;
struct clk *clk;
struct clk_lookup *clock;
struct mfd_cell *cell;
struct device *dev;
void __iomem *priv;
u32 priv_ctx[LPSS_PRIV_REG_COUNT];
int devid;
u32 caps;
u32 active_ltr;
u32 idle_ltr;
struct dentry *debugfs;
};
static const struct resource intel_lpss_dev_resources[] = {
DEFINE_RES_MEM_NAMED(LPSS_DEV_OFFSET, LPSS_DEV_SIZE, "lpss_dev"),
DEFINE_RES_MEM_NAMED(LPSS_PRIV_OFFSET, LPSS_PRIV_SIZE, "lpss_priv"),
DEFINE_RES_IRQ(0),
};
static const struct resource intel_lpss_idma64_resources[] = {
DEFINE_RES_MEM(LPSS_IDMA64_OFFSET, LPSS_IDMA64_SIZE),
DEFINE_RES_IRQ(0),
};
#define LPSS_IDMA64_DRIVER_NAME "idma64"
/*
* Cells needs to be ordered so that the iDMA is created first. This is
* because we need to be sure the DMA is available when the host controller
* driver is probed.
*/
static const struct mfd_cell intel_lpss_idma64_cell = {
.name = LPSS_IDMA64_DRIVER_NAME,
.num_resources = ARRAY_SIZE(intel_lpss_idma64_resources),
.resources = intel_lpss_idma64_resources,
};
static const struct mfd_cell intel_lpss_i2c_cell = {
.name = "i2c_designware",
.num_resources = ARRAY_SIZE(intel_lpss_dev_resources),
.resources = intel_lpss_dev_resources,
};
static const struct mfd_cell intel_lpss_uart_cell = {
.name = "dw-apb-uart",
.num_resources = ARRAY_SIZE(intel_lpss_dev_resources),
.resources = intel_lpss_dev_resources,
};
static const struct mfd_cell intel_lpss_spi_cell = {
.name = "pxa2xx-spi",
.num_resources = ARRAY_SIZE(intel_lpss_dev_resources),
.resources = intel_lpss_dev_resources,
};
static DEFINE_IDA(intel_lpss_devid_ida);
static struct dentry *intel_lpss_debugfs;
static int intel_lpss_request_dma_module(const char *name)
{
static bool intel_lpss_dma_requested;
if (intel_lpss_dma_requested)
return 0;
intel_lpss_dma_requested = true;
return request_module("%s", name);
}
static void intel_lpss_cache_ltr(struct intel_lpss *lpss)
{
lpss->active_ltr = readl(lpss->priv + LPSS_PRIV_ACTIVELTR);
lpss->idle_ltr = readl(lpss->priv + LPSS_PRIV_IDLELTR);
}
static int intel_lpss_debugfs_add(struct intel_lpss *lpss)
{
struct dentry *dir;
dir = debugfs_create_dir(dev_name(lpss->dev), intel_lpss_debugfs);
if (IS_ERR(dir))
return PTR_ERR(dir);
/* Cache the values into lpss structure */
intel_lpss_cache_ltr(lpss);
debugfs_create_x32("capabilities", S_IRUGO, dir, &lpss->caps);
debugfs_create_x32("active_ltr", S_IRUGO, dir, &lpss->active_ltr);
debugfs_create_x32("idle_ltr", S_IRUGO, dir, &lpss->idle_ltr);
lpss->debugfs = dir;
return 0;
}
static void intel_lpss_debugfs_remove(struct intel_lpss *lpss)
{
debugfs_remove_recursive(lpss->debugfs);
}
static void intel_lpss_ltr_set(struct device *dev, s32 val)
{
struct intel_lpss *lpss = dev_get_drvdata(dev);
u32 ltr;
/*
* Program latency tolerance (LTR) accordingly what has been asked
* by the PM QoS layer or disable it in case we were passed
* negative value or PM_QOS_LATENCY_ANY.
*/
ltr = readl(lpss->priv + LPSS_PRIV_ACTIVELTR);
if (val == PM_QOS_LATENCY_ANY || val < 0) {
ltr &= ~LPSS_PRIV_LTR_REQ;
} else {
ltr |= LPSS_PRIV_LTR_REQ;
ltr &= ~LPSS_PRIV_LTR_SCALE_MASK;
ltr &= ~LPSS_PRIV_LTR_VALUE_MASK;
if (val > LPSS_PRIV_LTR_VALUE_MASK)
ltr |= LPSS_PRIV_LTR_SCALE_32US | val >> 5;
else
ltr |= LPSS_PRIV_LTR_SCALE_1US | val;
}
if (ltr == lpss->active_ltr)
return;
writel(ltr, lpss->priv + LPSS_PRIV_ACTIVELTR);
writel(ltr, lpss->priv + LPSS_PRIV_IDLELTR);
/* Cache the values into lpss structure */
intel_lpss_cache_ltr(lpss);
}
static void intel_lpss_ltr_expose(struct intel_lpss *lpss)
{
lpss->dev->power.set_latency_tolerance = intel_lpss_ltr_set;
dev_pm_qos_expose_latency_tolerance(lpss->dev);
}
static void intel_lpss_ltr_hide(struct intel_lpss *lpss)
{
dev_pm_qos_hide_latency_tolerance(lpss->dev);
lpss->dev->power.set_latency_tolerance = NULL;
}
static int intel_lpss_assign_devs(struct intel_lpss *lpss)
{
const struct mfd_cell *cell;
unsigned int type;
type = lpss->caps & LPSS_PRIV_CAPS_TYPE_MASK;
type >>= LPSS_PRIV_CAPS_TYPE_SHIFT;
switch (type) {
case LPSS_DEV_I2C:
cell = &intel_lpss_i2c_cell;
break;
case LPSS_DEV_UART:
cell = &intel_lpss_uart_cell;
break;
case LPSS_DEV_SPI:
cell = &intel_lpss_spi_cell;
break;
default:
return -ENODEV;
}
lpss->cell = devm_kmemdup(lpss->dev, cell, sizeof(*cell), GFP_KERNEL);
if (!lpss->cell)
return -ENOMEM;
lpss->type = type;
return 0;
}
static bool intel_lpss_has_idma(const struct intel_lpss *lpss)
{
return (lpss->caps & LPSS_PRIV_CAPS_NO_IDMA) == 0;
}
static void intel_lpss_set_remap_addr(const struct intel_lpss *lpss)
{
resource_size_t addr = lpss->info->mem->start;
lo_hi_writeq(addr, lpss->priv + LPSS_PRIV_REMAP_ADDR);
}
static void intel_lpss_deassert_reset(const struct intel_lpss *lpss)
{
u32 value = LPSS_PRIV_RESETS_FUNC | LPSS_PRIV_RESETS_IDMA;
/* Bring out the device from reset */
writel(value, lpss->priv + LPSS_PRIV_RESETS);
}
static void intel_lpss_init_dev(const struct intel_lpss *lpss)
{
u32 value = LPSS_PRIV_SSP_REG_DIS_DMA_FIN;
intel_lpss_deassert_reset(lpss);
intel_lpss_set_remap_addr(lpss);
if (!intel_lpss_has_idma(lpss))
return;
/* Make sure that SPI multiblock DMA transfers are re-enabled */
if (lpss->type == LPSS_DEV_SPI)
writel(value, lpss->priv + LPSS_PRIV_SSP_REG);
}
static void intel_lpss_unregister_clock_tree(struct clk *clk)
{
struct clk *parent;
while (clk) {
parent = clk_get_parent(clk);
clk_unregister(clk);
clk = parent;
}
}
static int intel_lpss_register_clock_divider(struct intel_lpss *lpss,
const char *devname,
struct clk **clk)
{
char name[32];
struct clk *tmp = *clk;
snprintf(name, sizeof(name), "%s-enable", devname);
tmp = clk_register_gate(NULL, name, __clk_get_name(tmp), 0,
lpss->priv, 0, 0, NULL);
if (IS_ERR(tmp))
return PTR_ERR(tmp);
snprintf(name, sizeof(name), "%s-div", devname);
tmp = clk_register_fractional_divider(NULL, name, __clk_get_name(tmp),
0, lpss->priv, 1, 15, 16, 15, 0,
NULL);
if (IS_ERR(tmp))
return PTR_ERR(tmp);
*clk = tmp;
snprintf(name, sizeof(name), "%s-update", devname);
tmp = clk_register_gate(NULL, name, __clk_get_name(tmp),
CLK_SET_RATE_PARENT, lpss->priv, 31, 0, NULL);
if (IS_ERR(tmp))
return PTR_ERR(tmp);
*clk = tmp;
return 0;
}
static int intel_lpss_register_clock(struct intel_lpss *lpss)
{
const struct mfd_cell *cell = lpss->cell;
struct clk *clk;
char devname[24];
int ret;
if (!lpss->info->clk_rate)
return 0;
/* Root clock */
clk = clk_register_fixed_rate(NULL, dev_name(lpss->dev), NULL, 0,
lpss->info->clk_rate);
if (IS_ERR(clk))
return PTR_ERR(clk);
snprintf(devname, sizeof(devname), "%s.%d", cell->name, lpss->devid);
/*
* Support for clock divider only if it has some preset value.
* Otherwise we assume that the divider is not used.
*/
if (lpss->type != LPSS_DEV_I2C) {
ret = intel_lpss_register_clock_divider(lpss, devname, &clk);
if (ret)
goto err_clk_register;
}
ret = -ENOMEM;
/* Clock for the host controller */
lpss->clock = clkdev_create(clk, lpss->info->clk_con_id, "%s", devname);
if (!lpss->clock)
goto err_clk_register;
lpss->clk = clk;
return 0;
err_clk_register:
intel_lpss_unregister_clock_tree(clk);
return ret;
}
static void intel_lpss_unregister_clock(struct intel_lpss *lpss)
{
if (IS_ERR_OR_NULL(lpss->clk))
return;
clkdev_drop(lpss->clock);
intel_lpss_unregister_clock_tree(lpss->clk);
}
int intel_lpss_probe(struct device *dev,
const struct intel_lpss_platform_info *info)
{
struct intel_lpss *lpss;
int ret;
if (!info || !info->mem || info->irq <= 0)
return -EINVAL;
lpss = devm_kzalloc(dev, sizeof(*lpss), GFP_KERNEL);
if (!lpss)
return -ENOMEM;
lpss->priv = devm_ioremap(dev, info->mem->start + LPSS_PRIV_OFFSET,
LPSS_PRIV_SIZE);
if (!lpss->priv)
return -ENOMEM;
lpss->info = info;
lpss->dev = dev;
lpss->caps = readl(lpss->priv + LPSS_PRIV_CAPS);
dev_set_drvdata(dev, lpss);
ret = intel_lpss_assign_devs(lpss);
if (ret)
return ret;
lpss->cell->properties = info->properties;
intel_lpss_init_dev(lpss);
lpss->devid = ida_simple_get(&intel_lpss_devid_ida, 0, 0, GFP_KERNEL);
if (lpss->devid < 0)
return lpss->devid;
ret = intel_lpss_register_clock(lpss);
if (ret)
goto err_clk_register;
intel_lpss_ltr_expose(lpss);
ret = intel_lpss_debugfs_add(lpss);
if (ret)
dev_warn(dev, "Failed to create debugfs entries\n");
if (intel_lpss_has_idma(lpss)) {
/*
* Ensure the DMA driver is loaded before the host
* controller device appears, so that the host controller
* driver can request its DMA channels as early as
* possible.
*
* If the DMA module is not there that's OK as well.
*/
intel_lpss_request_dma_module(LPSS_IDMA64_DRIVER_NAME);
ret = mfd_add_devices(dev, lpss->devid, &intel_lpss_idma64_cell,
1, info->mem, info->irq, NULL);
if (ret)
dev_warn(dev, "Failed to add %s, fallback to PIO\n",
LPSS_IDMA64_DRIVER_NAME);
}
ret = mfd_add_devices(dev, lpss->devid, lpss->cell,
1, info->mem, info->irq, NULL);
if (ret)
goto err_remove_ltr;
dev_pm_set_driver_flags(dev, DPM_FLAG_SMART_SUSPEND);
return 0;
err_remove_ltr:
intel_lpss_debugfs_remove(lpss);
intel_lpss_ltr_hide(lpss);
intel_lpss_unregister_clock(lpss);
err_clk_register:
ida_simple_remove(&intel_lpss_devid_ida, lpss->devid);
return ret;
}
EXPORT_SYMBOL_GPL(intel_lpss_probe);
void intel_lpss_remove(struct device *dev)
{
struct intel_lpss *lpss = dev_get_drvdata(dev);
mfd_remove_devices(dev);
intel_lpss_debugfs_remove(lpss);
intel_lpss_ltr_hide(lpss);
intel_lpss_unregister_clock(lpss);
ida_simple_remove(&intel_lpss_devid_ida, lpss->devid);
}
EXPORT_SYMBOL_GPL(intel_lpss_remove);
static int resume_lpss_device(struct device *dev, void *data)
{
if (!dev_pm_test_driver_flags(dev, DPM_FLAG_SMART_SUSPEND))
pm_runtime_resume(dev);
return 0;
}
int intel_lpss_prepare(struct device *dev)
{
/*
* Resume both child devices before entering system sleep. This
* ensures that they are in proper state before they get suspended.
*/
device_for_each_child_reverse(dev, NULL, resume_lpss_device);
return 0;
}
EXPORT_SYMBOL_GPL(intel_lpss_prepare);
int intel_lpss_suspend(struct device *dev)
{
struct intel_lpss *lpss = dev_get_drvdata(dev);
unsigned int i;
/* Save device context */
for (i = 0; i < LPSS_PRIV_REG_COUNT; i++)
lpss->priv_ctx[i] = readl(lpss->priv + i * 4);
/*
* If the device type is not UART, then put the controller into
* reset. UART cannot be put into reset since S3/S0ix fail when
* no_console_suspend flag is enabled.
*/
if (lpss->type != LPSS_DEV_UART)
writel(0, lpss->priv + LPSS_PRIV_RESETS);
return 0;
}
EXPORT_SYMBOL_GPL(intel_lpss_suspend);
int intel_lpss_resume(struct device *dev)
{
struct intel_lpss *lpss = dev_get_drvdata(dev);
unsigned int i;
intel_lpss_deassert_reset(lpss);
/* Restore device context */
for (i = 0; i < LPSS_PRIV_REG_COUNT; i++)
writel(lpss->priv_ctx[i], lpss->priv + i * 4);
return 0;
}
EXPORT_SYMBOL_GPL(intel_lpss_resume);
static int __init intel_lpss_init(void)
{
intel_lpss_debugfs = debugfs_create_dir("intel_lpss", NULL);
return 0;
}
module_init(intel_lpss_init);
static void __exit intel_lpss_exit(void)
{
debugfs_remove(intel_lpss_debugfs);
}
module_exit(intel_lpss_exit);
MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");
MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>");
MODULE_AUTHOR("Heikki Krogerus <heikki.krogerus@linux.intel.com>");
MODULE_AUTHOR("Jarkko Nikula <jarkko.nikula@linux.intel.com>");
MODULE_DESCRIPTION("Intel LPSS core driver");
MODULE_LICENSE("GPL v2");
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