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Subject[PATCH v6 0/6] clk: Add functions to get optional clocks
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Quite a few drivers get an optional clock, e.g. a bus clock required to 
access peripheral's registers that is always enabled on some devices. This
series adds of_clk_get_by_name_optional(), clk_get_optional() and
devm_clk_get_optional() functions for this purpose.

The functions behave the same as of_clk_get_by_name(), clk_get() and
devm_clk_get() except that they will return NULL instead of -ENOENT. This
allows for simpler error handling in the callers.

*Note*
This changes the return values for of_clk_get_by_name() in some cases, see
[PATCH 1/6] clk: Add of_clk_get_by_name_optional() function.

v6:
- Rework the __of_clk_get_by_name() logic so as to avoid duplicate tests.
- Add doxygen style comment for devm_clk_get_optional() args
- Add clk_get_optional() to archs that don't use the commom clk framework.

Phil Edworthy (6):
clk: Add of_clk_get_by_name_optional() function
clk: Add functions to get optional clocks
m68k: coldfire: Add clk_get_optional() function
MIPS: AR7: Add clk_get_optional() function
MIPS: Loongson 2F: Add clk_get_optional() function
arch/unicore32/kernel/clock.c: Add clk_get_optional() function

arch/m68k/coldfire/clk.c | 11 ++++
arch/mips/ar7/clock.c | 11 ++++
arch/mips/loongson64/lemote-2f/clock.c | 11 ++++
arch/unicore32/kernel/clock.c | 11 ++++
drivers/clk/clk-devres.c | 18 ++++-
drivers/clk/clkdev.c | 91 ++++++++++++++++++++++----
include/linux/clk.h | 38 +++++++++++
7 files changed, 175 insertions(+), 16 deletions(-)

--
2.17.1

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