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| author |   Hans de Goede <hdegoede@redhat.com> | 2017-04-05 00:03:32 +0200 |
|---|---|---|
| committer |   Wolfram Sang <wsa@the-dreams.de> | 2017-04-16 22:01:35 +0200 |
| commit | 417f784379c2b582d96bde2b438dc1ecb0abd7c3 (patch) | |
| tree | 95d0e7c37848d49fe2cd5ae4d3355b2e38d9865a /drivers/i2c | |
| parent | Linux 4.11-rc3 (diff) | |
| download | linux-dev-417f784379c2b582d96bde2b438dc1ecb0abd7c3.tar.xz linux-dev-417f784379c2b582d96bde2b438dc1ecb0abd7c3.zip | |
i2c: core: Allow getting ACPI info by index
Modify struct i2c_acpi_lookup and i2c_acpi_fill_info() to allow
using them to get the info from a certain index in the ACPI-resource
list rather then taking the first I2cSerialBus resource.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/i2c-core.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c index d2402bbf6729..f7faa991a44c 100644 --- a/drivers/i2c/i2c-core.c +++ b/drivers/i2c/i2c-core.c @@ -112,6 +112,8 @@ struct i2c_acpi_lookup { acpi_handle adapter_handle; acpi_handle device_handle; acpi_handle search_handle; + int n; + int index; u32 speed; u32 min_speed; }; @@ -130,6 +132,9 @@ static int i2c_acpi_fill_info(struct acpi_resource *ares, void *data) if (sb->type != ACPI_RESOURCE_SERIAL_TYPE_I2C) return 1; + if (lookup->index != -1 && lookup->n++ != lookup->index) + return 1; + status = acpi_get_handle(lookup->device_handle, sb->resource_source.string_ptr, &lookup->adapter_handle); @@ -182,6 +187,7 @@ static int i2c_acpi_get_info(struct acpi_device *adev, memset(&lookup, 0, sizeof(lookup)); lookup.info = info; + lookup.index = -1; ret = i2c_acpi_do_lookup(adev, &lookup); if (ret) @@ -328,6 +334,7 @@ u32 i2c_acpi_find_bus_speed(struct device *dev) lookup.search_handle = ACPI_HANDLE(dev); lookup.min_speed = UINT_MAX; lookup.info = &dummy; + lookup.index = -1; status = acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, I2C_ACPI_MAX_SCAN_DEPTH, |