Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]


Groups > linux.kernel > #1237792

Re: [PATCH v2] clk:mxs: Fix bug on frequency divider

From Stephen Boyd <sboyd@codeaurora.org>
Newsgroups linux.kernel
Subject Re: [PATCH v2] clk:mxs: Fix bug on frequency divider
Date 2015-10-02 00:30 +0200
Message-ID <qeUwq-1eq-15@gated-at.bofh.it> (permalink)
References <pSmrM-4ep-3@gated-at.bofh.it> <q3sWS-2B0-13@gated-at.bofh.it>
Organization linux.* mail to news gateway

Show all headers | View raw


On 08/31, Victorien Vedrine wrote:
> On drivers/clk/mxs/clk-frac.c, the function clk_frac_round_rate returned a bad
> result. The division before multiplication computes a wrong value ; the
> calculation is inverted to fix the problem. The second issue is that the exact
> rate have decimals and they are truncate. The consequence is that the function
> clk_frac_set_rate (which use the result of clk_frac_round_rate) computes a
> wrong value for the register (the rate generated can be closer to the desired
> rate). The correction is : if there is decimal to the result, it is rounded to
> the next larger integer.
> On drivers/clk/mxs/clk-frac.c, the function clk_frac_recalc_rate returned
> a bad result. The multiplication is made before the division to compute a
> correct value.
> 
> Signed-off-by: Victorien Vedrine <victorien.vedrine@ophrys.net>
> ---

Applied to clk-next

-- 
Qualcomm Innovation Center, Inc. is a member of 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@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Back to linux.kernel | Previous | Next | Find similar | Unroll thread


Thread

Re: [PATCH v2] clk:mxs: Fix bug on frequency divider Stephen Boyd <sboyd@codeaurora.org> - 2015-10-02 00:30 +0200

csiph-web