mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-12 05:48:40 +00:00
![Mark Brown](/assets/img/avatar_default.png)
Currently the MFD core supports remapping MFD cell interrupts using an irqdomain but only if the MFD is being instantiated using device tree and only if the device tree bindings use the pattern of registering IPs in the device tree with compatible properties. This will be actively harmful for drivers which support non-DT platforms and use this pattern for their DT bindings as it will mean that the core will silently change remapping behaviour and it is also limiting for drivers which don't do DT with this particular pattern. There is also a potential fragility if there are interrupts not associated with MFD cells and all the cells are omitted from the device tree for some reason. Instead change the code to take an IRQ domain as an optional argument, allowing drivers to take the decision about the parent domain for their interrupts. The one current user of this feature is ab8500-core, it has the domain lookup pushed out into the driver. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
183 lines
4.8 KiB
C
183 lines
4.8 KiB
C
/*
|
|
* lpc_sch.c - LPC interface for Intel Poulsbo SCH
|
|
*
|
|
* LPC bridge function of the Intel SCH contains many other
|
|
* functional units, such as Interrupt controllers, Timers,
|
|
* Power Management, System Management, GPIO, RTC, and LPC
|
|
* Configuration Registers.
|
|
*
|
|
* Copyright (c) 2010 CompuLab Ltd
|
|
* Author: Denis Turischev <denis@compulab.co.il>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License 2 as published
|
|
* by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; see the file COPYING. If not, write to
|
|
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*/
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/acpi.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/mfd/core.h>
|
|
|
|
#define SMBASE 0x40
|
|
#define SMBUS_IO_SIZE 64
|
|
|
|
#define GPIOBASE 0x44
|
|
#define GPIO_IO_SIZE 64
|
|
#define GPIO_IO_SIZE_CENTERTON 128
|
|
|
|
#define WDTBASE 0x84
|
|
#define WDT_IO_SIZE 64
|
|
|
|
static struct resource smbus_sch_resource = {
|
|
.flags = IORESOURCE_IO,
|
|
};
|
|
|
|
|
|
static struct resource gpio_sch_resource = {
|
|
.flags = IORESOURCE_IO,
|
|
};
|
|
|
|
static struct mfd_cell lpc_sch_cells[] = {
|
|
{
|
|
.name = "isch_smbus",
|
|
.num_resources = 1,
|
|
.resources = &smbus_sch_resource,
|
|
},
|
|
{
|
|
.name = "sch_gpio",
|
|
.num_resources = 1,
|
|
.resources = &gpio_sch_resource,
|
|
},
|
|
};
|
|
|
|
static struct resource wdt_sch_resource = {
|
|
.flags = IORESOURCE_IO,
|
|
};
|
|
|
|
static struct mfd_cell tunnelcreek_cells[] = {
|
|
{
|
|
.name = "ie6xx_wdt",
|
|
.num_resources = 1,
|
|
.resources = &wdt_sch_resource,
|
|
},
|
|
};
|
|
|
|
static DEFINE_PCI_DEVICE_TABLE(lpc_sch_ids) = {
|
|
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SCH_LPC) },
|
|
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ITC_LPC) },
|
|
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_CENTERTON_ILB) },
|
|
{ 0, }
|
|
};
|
|
MODULE_DEVICE_TABLE(pci, lpc_sch_ids);
|
|
|
|
static int __devinit lpc_sch_probe(struct pci_dev *dev,
|
|
const struct pci_device_id *id)
|
|
{
|
|
unsigned int base_addr_cfg;
|
|
unsigned short base_addr;
|
|
int i;
|
|
int ret;
|
|
|
|
pci_read_config_dword(dev, SMBASE, &base_addr_cfg);
|
|
if (!(base_addr_cfg & (1 << 31))) {
|
|
dev_err(&dev->dev, "Decode of the SMBus I/O range disabled\n");
|
|
return -ENODEV;
|
|
}
|
|
base_addr = (unsigned short)base_addr_cfg;
|
|
if (base_addr == 0) {
|
|
dev_err(&dev->dev, "I/O space for SMBus uninitialized\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
smbus_sch_resource.start = base_addr;
|
|
smbus_sch_resource.end = base_addr + SMBUS_IO_SIZE - 1;
|
|
|
|
pci_read_config_dword(dev, GPIOBASE, &base_addr_cfg);
|
|
if (!(base_addr_cfg & (1 << 31))) {
|
|
dev_err(&dev->dev, "Decode of the GPIO I/O range disabled\n");
|
|
return -ENODEV;
|
|
}
|
|
base_addr = (unsigned short)base_addr_cfg;
|
|
if (base_addr == 0) {
|
|
dev_err(&dev->dev, "I/O space for GPIO uninitialized\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
gpio_sch_resource.start = base_addr;
|
|
|
|
if (id->device == PCI_DEVICE_ID_INTEL_CENTERTON_ILB)
|
|
gpio_sch_resource.end = base_addr + GPIO_IO_SIZE_CENTERTON - 1;
|
|
else
|
|
gpio_sch_resource.end = base_addr + GPIO_IO_SIZE - 1;
|
|
|
|
for (i=0; i < ARRAY_SIZE(lpc_sch_cells); i++)
|
|
lpc_sch_cells[i].id = id->device;
|
|
|
|
ret = mfd_add_devices(&dev->dev, 0,
|
|
lpc_sch_cells, ARRAY_SIZE(lpc_sch_cells), NULL,
|
|
0, NULL);
|
|
if (ret)
|
|
goto out_dev;
|
|
|
|
if (id->device == PCI_DEVICE_ID_INTEL_ITC_LPC
|
|
|| id->device == PCI_DEVICE_ID_INTEL_CENTERTON_ILB) {
|
|
pci_read_config_dword(dev, WDTBASE, &base_addr_cfg);
|
|
if (!(base_addr_cfg & (1 << 31))) {
|
|
dev_err(&dev->dev, "Decode of the WDT I/O range disabled\n");
|
|
ret = -ENODEV;
|
|
goto out_dev;
|
|
}
|
|
base_addr = (unsigned short)base_addr_cfg;
|
|
if (base_addr == 0) {
|
|
dev_err(&dev->dev, "I/O space for WDT uninitialized\n");
|
|
ret = -ENODEV;
|
|
goto out_dev;
|
|
}
|
|
|
|
wdt_sch_resource.start = base_addr;
|
|
wdt_sch_resource.end = base_addr + WDT_IO_SIZE - 1;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(tunnelcreek_cells); i++)
|
|
tunnelcreek_cells[i].id = id->device;
|
|
|
|
ret = mfd_add_devices(&dev->dev, 0, tunnelcreek_cells,
|
|
ARRAY_SIZE(tunnelcreek_cells), NULL,
|
|
0, NULL);
|
|
}
|
|
|
|
return ret;
|
|
out_dev:
|
|
mfd_remove_devices(&dev->dev);
|
|
return ret;
|
|
}
|
|
|
|
static void __devexit lpc_sch_remove(struct pci_dev *dev)
|
|
{
|
|
mfd_remove_devices(&dev->dev);
|
|
}
|
|
|
|
static struct pci_driver lpc_sch_driver = {
|
|
.name = "lpc_sch",
|
|
.id_table = lpc_sch_ids,
|
|
.probe = lpc_sch_probe,
|
|
.remove = __devexit_p(lpc_sch_remove),
|
|
};
|
|
|
|
module_pci_driver(lpc_sch_driver);
|
|
|
|
MODULE_AUTHOR("Denis Turischev <denis@compulab.co.il>");
|
|
MODULE_DESCRIPTION("LPC interface for Intel Poulsbo SCH");
|
|
MODULE_LICENSE("GPL");
|