From: "Kumar, Shobhit" <shobhit.kumar@intel.com>
To: "linus.walleij@linaro.org" <linus.walleij@linaro.org>
Cc: "Lu, Aaron" <aaron.lu@intel.com>,
"gnurou@gmail.com" <gnurou@gmail.com>,
"Nikula, Jani" <jani.nikula@intel.com>,
"intel-gfx@lists.freedesktop.org"
<intel-gfx@lists.freedesktop.org>,
"thierry.reding@gmail.com" <thierry.reding@gmail.com>,
"Vetter, Daniel" <daniel.vetter@intel.com>,
"lejun.zhu@linux.intel.com" <lejun.zhu@linux.intel.com>
Subject: Re: [PATCH 1/2] gpio/crystalcove: Export Panel and backlight en/disable signals as GPIO
Date: Thu, 12 Mar 2015 15:06:06 +0000 [thread overview]
Message-ID: <1426172763.9077.47.camel@intel.com> (raw)
In-Reply-To: <CACRpkdaqufO7VHTZrNrVvxpqeHQP2aE_e2kQbZkx4Y7jEd-ziQ@mail.gmail.com>
On Mon, 2015-03-09 at 18:15 +0100, Linus Walleij wrote:
> On Fri, Mar 6, 2015 at 5:23 PM, Kumar, Shobhit <shobhit.kumar@intel.com> wrote:
>
> > There are actually two lines for Panel Power control and Backlight
> > enable/disable. I have already moved towards adding a new Cell device
> > for PWM child device and a new pwm driver for the same. That will take
> > care of backlight thingy. But for the Panel power control, I am at loss
> > for how best to program that.
>
> Isn't it just a very simple regulator (just on/off of fixed voltage) cell?
>
It is just behaving as an output GPIO line and for that reason I feel
that rather than adding a new regulator driver, it is better to augment
the gpio-crystalcove driver. I am planning to export as GPIO from PMIC
MFD driver by way of lookup table and use in display side. Will send RFC
patch soon.
Backlight control as I said is a new pwm cell.
Regards
Shobhit
> Yours,
> Linus Walleij
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next prev parent reply other threads:[~2015-03-12 15:06 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-02-18 12:18 [PATCH 0/2] Crystal Cove PMIC based Panel Control Shobhit Kumar
2015-02-18 12:18 ` [PATCH 1/2] gpio/crystalcove: Export Panel and backlight en/disable signals as GPIO Shobhit Kumar
2015-03-06 11:04 ` Linus Walleij
2015-03-06 16:23 ` Kumar, Shobhit
2015-03-09 17:15 ` Linus Walleij
2015-03-12 15:06 ` Kumar, Shobhit [this message]
2015-03-18 11:50 ` Linus Walleij
2015-03-18 13:27 ` Daniel Vetter
2015-03-24 9:50 ` Linus Walleij
2015-03-25 12:27 ` Linus Walleij
2015-03-25 14:15 ` Kumar, Shobhit
2015-03-25 14:39 ` Linus Walleij
2015-02-18 12:18 ` [PATCH 2/2] drm/i915: Use the CRC gpio_chip for panel enable/disable Shobhit Kumar
2015-02-26 10:13 ` Alexandre Courbot
2015-03-01 13:24 ` Kumar, Shobhit
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