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hwmon: (w83781d) Fix I/O resource conflict with PNP

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Only request I/O ports 0x295-0x296 instead of the full I/O address
range. This solves a conflict with PNP resources on a few motherboards.

Also request the I/O ports in two parts (4 low ports, 4 high ports)
during device detection, otherwise the PNP resource makes the request
(and thus the detection) fail.

This fixes lm-sensors ticket #2306:
http://www.lm-sensors.org/ticket/2306

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com>
This commit is contained in:
Jean Delvare 2008-03-09 13:34:28 +01:00 committed by Mark M. Hoffman
parent 05dda977f2
commit 2961cb22ef
1 changed files with 16 additions and 5 deletions
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21
drivers/hwmon/w83781d.c
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@ -1367,7 +1367,8 @@ w83781d_isa_probe(struct platform_device *pdev)
/* Reserve the ISA region */
res = platform_get_resource(pdev, IORESOURCE_IO, 0);
if (!request_region(res->start, W83781D_EXTENT, "w83781d")) {
if (!request_region(res->start + W83781D_ADDR_REG_OFFSET, 2,
"w83781d")) {
err = -EBUSY;
goto exit;
}
@ -1415,7 +1416,7 @@ w83781d_isa_probe(struct platform_device *pdev)
device_remove_file(&pdev->dev, &dev_attr_name);
kfree(data);
exit_release_region:
release_region(res->start, W83781D_EXTENT);
release_region(res->start + W83781D_ADDR_REG_OFFSET, 2);
exit:
return err;
}
@ -1429,7 +1430,7 @@ w83781d_isa_remove(struct platform_device *pdev)
sysfs_remove_group(&pdev->dev.kobj, &w83781d_group);
sysfs_remove_group(&pdev->dev.kobj, &w83781d_group_opt);
device_remove_file(&pdev->dev, &dev_attr_name);
release_region(data->client.addr, W83781D_EXTENT);
release_region(data->client.addr + W83781D_ADDR_REG_OFFSET, 2);
kfree(data);
return 0;
@ -1797,8 +1798,17 @@ w83781d_isa_found(unsigned short address)
{
int val, save, found = 0;
if (!request_region(address, W83781D_EXTENT, "w83781d"))
/* We have to request the region in two parts because some
boards declare base+4 to base+7 as a PNP device */
if (!request_region(address, 4, "w83781d")) {
pr_debug("w83781d: Failed to request low part of region\n");
return 0;
}
if (!request_region(address + 4, 4, "w83781d")) {
pr_debug("w83781d: Failed to request high part of region\n");
release_region(address, 4);
return 0;
}
#define REALLY_SLOW_IO
/* We need the timeouts for at least some W83781D-like
@ -1871,7 +1881,8 @@ w83781d_isa_found(unsigned short address)
val == 0x30 ? "W83782D" : "W83781D", (int)address);
release:
release_region(address, W83781D_EXTENT);
release_region(address + 4, 4);
release_region(address, 4);
return found;
}