Commit ca6f998c authored by Pierre-Louis Bossart's avatar Pierre-Louis Bossart Committed by Rafael J. Wysocki

ACPI: bus: change _ADR representation to 64 bits

Standards such as the MIPI DisCo for SoundWire 1.0 specification
assume the _ADR field is 64 bits.

_ADR is defined as an "Integer" represented as 64 bits since ACPI 2.0
released in 2002. The low levels already use _ADR as 64 bits, e.g. in
struct acpi_device_info.

This patch bumps the representation used for sysfs to 64 bits. To
avoid any compatibility/ABI issues, the printf format is only extended
to 16 characters when the actual _ADR value exceeds the 32 bit
maximum.

Example with a SoundWire device, the results show the complete
vendorID and linkID which were omitted before:

Before:
$ more /sys/bus/acpi/devices/device\:38/adr
0x5d070000
After:
$ more /sys/bus/acpi/devices/device\:38/adr
0x000010025d070000
Signed-off-by: default avatarPierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
[ rjw: Replace 0xFFFFFFFF with U32_MAX, clean up subject ]
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 59df1c2b
...@@ -428,8 +428,10 @@ static ssize_t acpi_device_adr_show(struct device *dev, ...@@ -428,8 +428,10 @@ static ssize_t acpi_device_adr_show(struct device *dev,
{ {
struct acpi_device *acpi_dev = to_acpi_device(dev); struct acpi_device *acpi_dev = to_acpi_device(dev);
return sprintf(buf, "0x%08x\n", if (acpi_dev->pnp.bus_address > U32_MAX)
(unsigned int)(acpi_dev->pnp.bus_address)); return sprintf(buf, "0x%016llx\n", acpi_dev->pnp.bus_address);
else
return sprintf(buf, "0x%08llx\n", acpi_dev->pnp.bus_address);
} }
static DEVICE_ATTR(adr, 0444, acpi_device_adr_show, NULL); static DEVICE_ATTR(adr, 0444, acpi_device_adr_show, NULL);
......
...@@ -230,7 +230,7 @@ struct acpi_device_dir { ...@@ -230,7 +230,7 @@ struct acpi_device_dir {
/* Plug and Play */ /* Plug and Play */
typedef char acpi_bus_id[8]; typedef char acpi_bus_id[8];
typedef unsigned long acpi_bus_address; typedef u64 acpi_bus_address;
typedef char acpi_device_name[40]; typedef char acpi_device_name[40];
typedef char acpi_device_class[20]; typedef char acpi_device_class[20];
......
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