On Tue, Jun 28, 2016 at 07:59:35PM +0200, Sylwester Nawrocki wrote: > On 06/27/2016 06:33 PM, Mark Brown wrote: > > On Thu, Jun 23, 2016 at 12:45:13PM +0200, Sylwester Nawrocki wrote: > >> > + /* Brownout protection enable */ > >> > + regmap_write(map, MAX98504_REG_PVDD_BROWNOUT_ENABLE, 0x1); > >> > + /* Threshold 2.9V, 3dB speaker attenuation*/ > >> > + regmap_write(map, MAX98504_REG_PVDD_BROWNOUT_CONFIG(1), 0x33); > >> > + /* Attack hold time 10 ms */ > >> > + regmap_write(map, MAX98504_REG_PVDD_BROWNOUT_CONFIG(2), 0x0a); > >> > + /* Brownout hold time 255 ms, brownout release time 255 ms */ > >> > + regmap_write(map, MAX98504_REG_PVDD_BROWNOUT_CONFIG(3), 0xff); > >> > + regmap_write(map, MAX98504_REG_PVDD_BROWNOUT_CONFIG(4), 0xff); > > Should these be DT properties? > I'm not sure, these properties define the speaker gain decrease pattern > during VBAT brownout, it seems a system integration detail and will most > likely differ from board to board. I'd assume it's acceptable to put > these in DT, looking at other bindings. I've prepared something like > this: Exactly, yes - it depends on the characteristics of the speaker which is hardware. Your proposals look OK.
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