From: Rob Herring <robh@kernel.org>
To: Sam Ravnborg <sam@ravnborg.org>
Cc: "Alessandro Zummo" <a.zummo@towertech.it>,
"Alexandre Belloni" <alexandre.belloni@bootlin.com>,
"Andrew Jeffery" <andrew@aj.id.au>,
"Fabio Estevam" <fabio.estevam@nxp.com>,
"Joel Stanley" <joel@jms.id.au>,
"Mark Rutland" <mark.rutland@arm.com>,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-rtc@vger.kernel.org, "Sam Ravnborg" <sam@ravnborg.org>,
"Søren Andersen" <san@skov.dk>
Subject: Re: [PATCH v2 2/5] dt-binding: pcf8523: add xtal load capacitance
Date: Tue, 15 Jan 2019 15:06:57 -0600 [thread overview]
Message-ID: <20190115210657.GA24662@bogus> (raw)
In-Reply-To: <20190108185414.26922-3-sam@ravnborg.org>
On Tue, 8 Jan 2019 19:54:11 +0100, Sam Ravnborg wrote:
> The NXP pcf8523 supports two different xtal load capacitance
> - 7000fF (7pF) HW default
> - 12500fF (12.5pF) Minimum power consumption, driver default
>
> To obtain a precise RTC the pcf8523 must be configured
> with the correct capacitance load of the xtal.
>
> Add a property to specify the xtal capacitance load.
> The default value matches that of the current Linux driver.
>
> With a dedicated binding remove the entry in rtc.txt
>
> Signed-off-by: Søren Andersen <san@skov.dk>
> Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
> Cc: Alessandro Zummo <a.zummo@towertech.it>
> Cc: Alexandre Belloni <alexandre.belloni@bootlin.com>
> Cc: Rob Herring <robh+dt@kernel.org>
> Cc: Mark Rutland <mark.rutland@arm.com>
> ---
> Documentation/devicetree/bindings/rtc/nxp,pcf8523.txt | 18 ++++++++++++++++++
> Documentation/devicetree/bindings/rtc/rtc.txt | 1 -
> 2 files changed, 18 insertions(+), 1 deletion(-)
> create mode 100644 Documentation/devicetree/bindings/rtc/nxp,pcf8523.txt
>
Reviewed-by: Rob Herring <robh@kernel.org>
next prev parent reply other threads:[~2019-01-15 21:07 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-08 18:54 [PATCH v2 0/5] add quartz load support to NXP rtc drivers Sam Ravnborg
2019-01-08 18:54 ` [PATCH v2 1/5] devicetree: property-units: Add femtofarads unit Sam Ravnborg
2019-01-15 21:04 ` Rob Herring
2019-01-08 18:54 ` [PATCH v2 2/5] dt-binding: pcf8523: add xtal load capacitance Sam Ravnborg
2019-01-15 21:06 ` Rob Herring [this message]
2019-01-08 18:54 ` [PATCH v2 3/5] dt-binding: pcf85063: " Sam Ravnborg
2019-01-15 21:08 ` Rob Herring
2019-01-15 22:22 ` Sam Ravnborg
2019-01-08 18:54 ` [PATCH v2 4/5] rtc: pcf8523: set xtal load capacitance from DT Sam Ravnborg
2019-01-16 21:04 ` Alexandre Belloni
2019-01-08 18:54 ` [PATCH v2 5/5] rtc: pcf85063: " Sam Ravnborg
2019-01-16 21:11 ` Alexandre Belloni
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