[alsa-devel] [PATCH/RFC 00/14] ASoC: samsung: Add clk provider for I2S internal clocks

[Sylwester Nawrocki]

This series is an attempt to resolve the CDCLK clock gating issue on Odroid
X2/U3 reported by Daniel Drake [1], by exposing the CDCLK gate clock through
clk API.  The remaining clocks (mux and divider) are also exposed, so the
clk API could be already used instead of the set_sysclk() calls in the machine
drivers.

I need some more thought about interaction between the clk API calls on the
clocks being exposed and the ASoC calls into sound/soc/samsung/i2s.c.
I'm sending teh patches for review though to avoid any waste of time should
it turn out the direction taken is wrong.

This whole series definitely needs more testing, so far I only tested it
on Odroid X2, with the I2S working in slave mode.

[1] http://mailman.alsa-project.org/pipermail/alsa-devel/2014-September/081753.html

Sylwester Nawrocki (14):
  ASoC: samsung: i2s: Remove unused gpios field from struct i2s
  ASoC: samsung: i2s: samsung_i2s_get_driver_data() cleanup
  ASoC: samsung: i2s: Add return value checks in probe()
  ASoC: samsung: i2s: Request memory region in driver probe()
  ASoC: samsung: i2s: Move clk_get() to platform driver probe()
  ASoC: samsung: i2s: Move clk enable to the platform driver probe()
  ASoC: samsung: i2s: Add get_other_dai helper function
  ASoC: samsung: i2s: Remove an unneeded goto usage
  ASoC: samsung: i2s: Add spinlock in place of local_irq_* calls
  ASoC: samsung: i2s: Protect access to more registers with a spinlock
  ASoC: samsung: odroidx2: Handle I2S CDCLK clock conditionally
  ASoC: samsung: i2s: Add clock provider for the I2S internal clocks
  ARM: dts: Exynos4 and Odroid X2/U3 sound device nodes update
  ARM: dts: Switch Odroid X2/U2 to simple-audio-card

 .../devicetree/bindings/sound/samsung-i2s.txt      |   18 +-
 arch/arm/boot/dts/exynos4.dtsi                     |    9 +
 arch/arm/boot/dts/exynos4412-odroid-common.dtsi    |   26 +-
 arch/arm/boot/dts/exynos4412-odroidu3.dts          |    8 +-
 arch/arm/boot/dts/exynos4412-odroidx2.dts          |    8 +-
 sound/soc/samsung/i2s.c                            |  365 ++++++++++++--------
 sound/soc/samsung/odroidx2_max98090.c              |    6 +-
 7 files changed, 282 insertions(+), 158 deletions(-)

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