linux-kernel - Re: [PATCH v2] clk: qcom: Properly change rates for ahbix clock

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:	Wed, 11 Mar 2015 20:42:34 -0700
From:	Kenneth Westfield <kwestfie@...eaurora.org>
To:	Stephen Boyd <sboyd@...eaurora.org>
Cc:	Mike Turquette <mturquette@...aro.org>,
	linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	Kenneth Westfield <kwestfie@...eaurora.org>
Subject: Re: [PATCH v2] clk: qcom: Properly change rates for ahbix clock

On Fri, Mar 06, 2015 at 03:41:53PM -0800, Stephen Boyd wrote:
> The ahbix clock can never be turned off in practice. To change the
> rates we need to switch the mux off the M/N counter to an always on
> source (XO), reprogram the M/N counter to get the rate we want and
> finally switch back to the M/N counter. Add a new ops structure
> for this type of clock so that we can set the rate properly.
> 
> Fixes: c99e515a92e9 "clk: qcom: Add IPQ806X LPASS clock controller (LCC) driver"
> Cc: Kenneth Westfield <kwestfie@...eaurora.org>
> Signed-off-by: Stephen Boyd <sboyd@...eaurora.org>
> ---
> 
> Changes from v1:
>  * Handle the case where clock feeding M/N counter is off
> 
>  drivers/clk/qcom/clk-rcg.c     | 62 ++++++++++++++++++++++++++++++++++++++++++
>  drivers/clk/qcom/clk-rcg.h     |  1 +
>  drivers/clk/qcom/lcc-ipq806x.c |  5 ++--
>  3 files changed, 65 insertions(+), 3 deletions(-)

Verified I2S audio functionality on the Storm board; with and without
firmware audio enabled.

Tested-by: Kenneth Westfield <kwestfie@...eaurora.org>

-- 
Kenneth Westfield
Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, 
a Linux Foundation Collaborative Project
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/