serial: 8250_dw: Use devm_clk_get_optional() to get the input clock

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Simplify the code which fetches the input clock by using
devm_clk_get_optional(). This comes with a small functional change: previously
all errors were ignored except deferred probe. Now all errors are
treated as errors. If no input clock is present devm_clk_get_optional() will
return NULL instead of an error which matches the behavior of the old code.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20190925162617.30368-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Andy Shevchenko 2019-09-25 19:26:17 +03:00 • committed by Greg Kroah-Hartman

parent 254cc7743e

commit a8afc19355

1 changed files with 32 additions and 43 deletions

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drivers/tty/serial/8250/8250_dw.c

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