On Thu, Jun 30, 2016 at 07:16:46PM +0200, Sylwester Nawrocki wrote: > Sorry, I didn't notice this e-mail earlier. With previous Exynos versions > the LPASS (or AudioSS) was mainly about the embedded audio DSP processor > (at least WRT to SFRs), which was not required for boards supported in > the mainline kernel. Since e.g. Exynos5433 the LPASS SFR region contains > also entries related to other IP blocks, like I2S or DMAC. Even though > functionality covered by these registers is still rather trivial, like > SW resets and unmasking interrupts, it's essential for the whole audio > subsystem operation. The intention was to have in future the LPASS driver > covering any functionality provided by the embedded audio dedicated MCU. > I'm afraid we have to handle those power sequences in central place to > ensure proper SoC operation. I would also rather avoid adding any exynos > quirks to the PL330 DMAC driver. Hrm. This is sounding a bit like a combination of a power domain and an interrupt controller, would something like that fit in perhaps? Depends on how many of these trivial bits there are I think...
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