From: Alexandre Belloni <alexandre.belloni@bootlin.com>
To: Sam Ravnborg <sam@ravnborg.org>
Cc: "Alessandro Zummo" <a.zummo@towertech.it>,
"Andrew Jeffery" <andrew@aj.id.au>,
"Fabio Estevam" <fabio.estevam@nxp.com>,
"Joel Stanley" <joel@jms.id.au>,
"Mark Rutland" <mark.rutland@arm.com>,
"Rob Herring" <robh+dt@kernel.org>,
"Russell King" <linux@armlinux.org.uk>,
"Sascha Hauer" <s.hauer@pengutronix.de>,
"Shawn Guo" <shawnguo@kernel.org>,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-rtc@vger.kernel.org, "Søren Andersen" <san@skov.dk>
Subject: Re: [PATCH v1 1/5] dt-binding: rtci-pcf8523: add quartz_load property
Date: Thu, 13 Sep 2018 22:51:36 +0200 [thread overview]
Message-ID: <20180913205136.GL14988@piout.net> (raw)
In-Reply-To: <20180913204412.GA30987@ravnborg.org>
On 13/09/2018 22:44:12+0200, Sam Ravnborg wrote:
> > The boolean properties usually don't work well for RTCs because people
> > usually want to keep any previous configuration that may have been done
> > at the factory or in the bootloader so I would use:
> >
> > nxp,quartz_load_fF and this would be either 7000 or 12500.
> We had is implmented like this (using pF) in the beginning but
> then went for the simpler property.
> Will add a fF property as you suggest and avoid breaking the existing drivers.
> We will check a few of the boards to see if the current configuration
> of the pcf8523 driver looks wrong, and if so we will print
> the warnings as suggested.
>
> I think the above covers feedback on all patches.
> And thanks for the feedback!
>
Hint: look at the cubox-i and the hummingboard schematics. I'm
definitely not an analog expert but the two capacitors on the cubox-i
are making me think that the setting should be different from the
hummingboard.
--
Alexandre Belloni, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com
next prev parent reply other threads:[~2018-09-14 2:02 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-22 18:35 [PATCH v4 0/3] Add Davicom phy + reset-gpios Sam Ravnborg
2018-08-22 18:36 ` [PATCH v4 1/3] phylib: add Davicom PHY support Sam Ravnborg
2018-08-22 18:36 ` [PATCH v4 2/3] phylib: add support for reset-gpios Sam Ravnborg
2018-08-22 18:36 ` [PATCH v4 3/3] at91sam9263ek: add PHY, miitool etc. to config Sam Ravnborg
2018-08-24 8:03 ` [PATCH v4 0/3] Add Davicom phy + reset-gpios Sascha Hauer
2018-09-07 19:35 ` [PATCH v1 0/5] add quartz load support to NXP rtc drivers Sam Ravnborg
2018-09-07 19:35 ` [PATCH v1 1/5] dt-binding: rtci-pcf8523: add quartz_load property Sam Ravnborg
2018-09-07 21:43 ` Sam Ravnborg
2018-09-13 19:05 ` Alexandre Belloni
2018-09-13 20:44 ` Sam Ravnborg
2018-09-13 20:51 ` Alexandre Belloni [this message]
2018-09-26 15:47 ` Rob Herring
2018-09-26 18:51 ` Alexandre Belloni
2018-09-26 20:42 ` Sam Ravnborg
2018-09-07 19:35 ` [PATCH v1 2/5] dt-binding: rtc-pcf85063: add quartz load property Sam Ravnborg
2018-09-13 19:11 ` Alexandre Belloni
2018-09-07 19:35 ` [PATCH v1 3/5] dts: add nxp,quartz_load_12.5pf to all pcf8523 nodes Sam Ravnborg
2018-09-13 19:14 ` Alexandre Belloni
2018-09-07 19:35 ` [PATCH v1 4/5] rtc: pcf8523: external capacitor configuration Sam Ravnborg
2018-09-13 19:27 ` Alexandre Belloni
2018-09-07 19:35 ` [PATCH v1 5/5] rtc: pcf85063: " Sam Ravnborg
2018-09-13 19:29 ` Alexandre Belloni
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