From: Martin Sperl <kernel@xxxxxxxxxxxxxxxx>
This patchset enables the bcm2835-i2s driver to use the clock
framework which was introduced with commit 94cb7f76caa0
("ARM: bcm2835: Switch to using the new clock driver support.").
This commit resulted in the fact that the bcm2835-i2s driver was
no longer working due to some register addresses used by 2 drivers
(clk-bcm2835 and bcm2835-i2s).
This patchset requires that the patchset for PCM-clock
support as well as fractional/mash support is applied to
the clk-bcm2835 driver and the corresponding device tree,
but as the current version of the driver is not working,
that should not be a problem.
Note that there is one change:
right now the current driver tries to calculate an optimal
bclk_ratio based on its knowledge that it is using the 19.2Mhz
oscillator. This computation would recommend the use of 40
or 80 bits instead of 32/64 bits that are required.
Some of the DACs can not handle this, so most downstream
drivers would set snd_soc_dai_set_bclk_ratio explicitly to
disable this "non-power-of-2" automatic selection.
So it seems wise to leave it out of the current patchset.
If it is deemed necessary, then I can provide a separate
patch that implements this again.
Changelog:
V1->V2: * moving clock patches into a separate patchset,
which fixes also other issues in the clock framework
* remove unnecessary bclk_size assignments
Martin Sperl (3):
ASoC: bcm2835: move to use the clock framework
ARM: bcm2835: I2S: use new register-range and clock framework
dt-bindings: bsm2835: fix bindings documentation to use new clock
framework
.../devicetree/bindings/sound/brcm,bcm2835-i2s.txt | 7 +-
arch/arm/boot/dts/bcm2835.dtsi | 5 +-
sound/soc/bcm/bcm2835-i2s.c | 284 +++++---------------
3 files changed, 69 insertions(+), 227 deletions(-)
--
1.7.10.4
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