From: Axel Lin <axel.lin@ingics.com>
To: Henry Chen <henryc.chen@mediatek.com>
Cc: Mark Brown <broonie@kernel.org>,
Javier Martinez Canillas <javier@osg.samsung.com>,
Liam Girdwood <lgirdwood@gmail.com>,
linux-kernel@vger.kernel.org
Subject: regulator: Question about the buck_volt_range and MT6311_MAX_UV setting
Date: Thu, 30 Jul 2015 21:10:41 +0800 [thread overview]
Message-ID: <1438261841.9954.6.camel@ingics.com> (raw)
Hi Henry,
Seems something wrong in either buck_volt_range or MT6311_MAX_UV setting.
.n_voltages = (MT6311_MAX_UV - MT6311_MIN_UV) / MT6311_STEP_UV + 1
(1400000 - 600000) / 6250 + 1 = 129
So .n_voltages = 129.
>From the buck_volt_range:
The linear range has min_sel: 0, max_sel: 0x7f
(0 ~ 127, so 128 selector in this range)
And the max voltage is
600000 + 0x7f * 6250 = 1393750
I don't have the datasheet, so can you double check this?
Thank,
Axel
next reply other threads:[~2015-07-30 13:10 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-30 13:10 Axel Lin [this message]
2015-07-31 1:12 ` regulator: Question about the buck_volt_range and MT6311_MAX_UV setting Henry Chen
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