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of: Add function for generating a DT modalias with a newline

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The modalias sysfs attr is lacking a newline for DT aliases on platform
devices. The macio and ibmebus correctly add the newline, but open code it.
Introduce a new function, of_device_modalias(), that fills the buffer with
the modalias including the newline and update users of the old
of_device_get_modalias function.

Signed-off-by: Rob Herring <robh@kernel.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Frank Rowand <frowand.list@gmail.com>
Cc: linuxppc-dev@lists.ozlabs.org
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Rob Herring
2017-03-22 09:16:27 -05:00
parent bcf54d5385
commit 0634c29589
7 changed files with 24 additions and 22 deletions
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18
drivers/of/device.c
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@@ -176,7 +176,7 @@ const void *of_device_get_match_data(const struct device *dev)
}
EXPORT_SYMBOL(of_device_get_match_data);
ssize_t of_device_get_modalias(struct device *dev, char *str, ssize_t len)
static ssize_t of_device_get_modalias(struct device *dev, char *str, ssize_t len)
{
const char *compat;
int cplen, i;
@@ -225,7 +225,6 @@ ssize_t of_device_get_modalias(struct device *dev, char *str, ssize_t len)
return repend;
}
EXPORT_SYMBOL_GPL(of_device_get_modalias);
int of_device_request_module(struct device *dev)
{
@@ -250,6 +249,21 @@ int of_device_request_module(struct device *dev)
}
EXPORT_SYMBOL_GPL(of_device_request_module);
/**
* of_device_modalias - Fill buffer with newline terminated modalias string
*/
ssize_t of_device_modalias(struct device *dev, char *str, ssize_t len)
{
ssize_t sl = of_device_get_modalias(dev, str, len - 2);
if (sl < 0)
return sl;
str[sl++] = '\n';
str[sl] = 0;
return sl;
}
EXPORT_SYMBOL_GPL(of_device_modalias);
/**
* of_device_uevent - Display OF related uevent information
*/