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    SubjectRe: [PATCH 11/15] i2c: core: Allow getting ACPI info by index
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    On Fri, 2017-03-17 at 10:55 +0100, Hans de Goede wrote:
    > 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.
    >

    +Cc: Jarkko (our main I2C guy)

    > Signed-off-by: Hans de Goede <hdegoede@redhat.com>
    > ---
    >  drivers/i2c/i2c-core.c | 7 +++++++
    >  1 file changed, 7 insertions(+)
    >
    > diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
    > index d2402bb..32b58fb 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;
    >  };
    > @@ -123,6 +125,9 @@ static int i2c_acpi_fill_info(struct acpi_resource
    > *ares, void *data)
    >   struct acpi_resource_i2c_serialbus *sb;
    >   acpi_status status;
    >  
    > + if (lookup->index != -1 && lookup->n++ != lookup->index)
    > + return 1;
    > +
    >   if (info->addr || ares->type !=
    > ACPI_RESOURCE_TYPE_SERIAL_BUS)
    >   return 1;
    >  
    > @@ -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,

    --
    Andy Shevchenko <andriy.shevchenko@linux.intel.com>
    Intel Finland Oy

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