Re: [alsa-devel] ASoC: wm5110: Extend SYSCLK patch file for rev D
I'm looking at commit 34354792432b6e0a3b156819a1a19716c50d3473 and include/linux/mfd/arizona/registers.h, and wondering what exactly this the register patch is changing.
It looks like there are some registers not named elsewhere (addresses 0x0049, 0x004a, 0x0057, 0x0058). What about the higher addresses? Are these more registers, or is this patching firmware in device memory?
Ben.
On Thu, Mar 06, 2014 at 01:47:05AM +0000, Ben Hutchings wrote:
I'm looking at commit 34354792432b6e0a3b156819a1a19716c50d3473 and include/linux/mfd/arizona/registers.h, and wondering what exactly this the register patch is changing.
It looks like there are some registers not named elsewhere (addresses 0x0049, 0x004a, 0x0057, 0x0058). What about the higher addresses? Are these more registers, or is this patching firmware in device memory?
These are all internal registers that we don't usually expose, in the case of the Rev D some of these are not initialised to optimum values by the hardware the patch provides better audio performance and path transitions.
Thanks, Charles
On Thu, 2014-03-06 at 09:32 +0000, Charles Keepax wrote:
On Thu, Mar 06, 2014 at 01:47:05AM +0000, Ben Hutchings wrote:
I'm looking at commit 34354792432b6e0a3b156819a1a19716c50d3473 and include/linux/mfd/arizona/registers.h, and wondering what exactly this the register patch is changing.
It looks like there are some registers not named elsewhere (addresses 0x0049, 0x004a, 0x0057, 0x0058). What about the higher addresses? Are these more registers, or is this patching firmware in device memory?
These are all internal registers that we don't usually expose, in the case of the Rev D some of these are not initialised to optimum values by the hardware the patch provides better audio performance and path transitions.
Thanks.
Ben.
participants (2)
-
Ben Hutchings -
Charles Keepax