From: Jisheng Zhang <jszhang@marvell.com>
To: rjw@sisk.pl, viresh.kumar@linaro.org
Cc: cpufreq@vger.kernel.org, linux-pm@vger.kernel.org,
linux-arm-kernel <linux-arm-kernel-bounces@lists.infradead.org>
Subject: [RFC] cpufreq-cpu0: allow OPP table supplied by platform
Date: Thu, 13 Mar 2014 18:48:59 +0800 [thread overview]
Message-ID: <20140313184859.7d6f6512@xhacker> (raw)
Hi all,
cpufreq-cpu0 is suitable for Marvell Berlin SoC. But there's one issue to address.
The opp is different between chips even on the same step SoC, BG2Q for example.
we can calculate the OPP table from the value of one OTP register. We have two
solutions:
1. bootloader reads OTP register and calculate the OPP table then change dtb
danamically
2. supply one driver in mach-berlin to initialize the OPP table; and modify
cpufreq-cpu0 to allow platform supply OPP table, fall back to of_init_opp_table()
if there's no OPP table.
Which solution is better?
Thanks in advance,
Jisheng
next reply other threads:[~2014-03-13 10:48 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-03-13 10:48 Jisheng Zhang [this message]
2014-03-13 10:55 ` [RFC] cpufreq-cpu0: allow OPP table supplied by platform Viresh Kumar
2014-03-13 10:56 ` Viresh Kumar
2014-03-13 11:44 ` Jisheng Zhang
2014-03-13 17:43 ` Sören Brinkmann
2014-03-14 12:32 ` Shawn Guo
2014-03-14 15:36 ` Nishanth Menon
2014-03-14 19:32 ` Dave Gerlach
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