From: Rob Herring <robh@kernel.org>
To: Biwen Li <biwen.li@nxp.com>
Cc: a.zummo@towertech.it, alexandre.belloni@bootlin.com,
mark.rutland@arm.com, leoyang.li@nxp.com,
linux-rtc@vger.kernel.org, linux-kernel@vger.kernel.org,
devicetree@vger.kernel.org, Martin Fuzzey <mfuzzey@parkeon.com>
Subject: Re: [1/2] dt-bindings: rtc: pcf85263/pcf85363: add some properties
Date: Mon, 02 Sep 2019 14:39:04 +0100 [thread overview]
Message-ID: <5d6d1b79.1c69fb81.29f0d.e042@mx.google.com> (raw)
In-Reply-To: <20190830091720.41156-1-biwen.li@nxp.com>
On Fri, Aug 30, 2019 at 05:17:19PM +0800, Biwen Li wrote:
> Add some properties for pcf85263/pcf85363 as follows:
> - interrupt-output-pin: string type
> - quartz-load-capacitance: integer type
> - quartz-drive-strength: integer type
> - quartz-low-jitter: bool type
> - wakeup-source: bool type
>
> Signed-off-by: Martin Fuzzey <mfuzzey@parkeon.com>
> Signed-off-by: Biwen Li <biwen.li@nxp.com>
> ---
> .../devicetree/bindings/rtc/pcf85363.txt | 31 +++++++++++++++++++
> include/dt-bindings/rtc/pcf85363.h | 15 +++++++++
> 2 files changed, 46 insertions(+)
> create mode 100644 include/dt-bindings/rtc/pcf85363.h
>
> diff --git a/Documentation/devicetree/bindings/rtc/pcf85363.txt b/Documentation/devicetree/bindings/rtc/pcf85363.txt
> index 94adc1cf93d9..d83359990bd7 100644
> --- a/Documentation/devicetree/bindings/rtc/pcf85363.txt
> +++ b/Documentation/devicetree/bindings/rtc/pcf85363.txt
> @@ -8,10 +8,41 @@ Required properties:
> Optional properties:
> - interrupts: IRQ line for the RTC (not implemented).
>
> +- interrupt-output-pin: The interrupt output pin must be
> + "NONE", "INTA" or "INTB", default value is "NONE"
> +
> +- quartz-load-capacitance: The internal capacitor to select for the quartz:
> + PCF85263_QUARTZCAP_7pF [0]
> + PCF85263_QUARTZCAP_6pF [1]
> + PCF85263_QUARTZCAP_12p5pF [2] DEFAULT
We have a common property for this. Use it.
> +
> +- quartz-drive-strength: Drive strength for the quartz:
> + PCF85263_QUARTZDRIVE_NORMAL [0] DEFAULT
> + PCF85263_QUARTZDRIVE_LOW [1]
> + PCF85263_QUARTZDRIVE_HIGH [2]
> +
> +- quartz-low-jitter: Boolean property, if present enables low jitter mode
> + which reduces jitter at the cost of increased power consumption.
These 2 need vendor prefixes.
> +
> +- wakeup-source: Boolean property, mark the chip as a wakeup source,
> + independently of the availability of an IRQ line connected to the SoC.
> + This is useful if the IRQ line is connected to a PMIC or other circuit
> + that can power up the device rather than to a normal SOC interrupt.
> +
> Example:
>
> pcf85363: pcf85363@51 {
> compatible = "nxp,pcf85363";
> reg = <0x51>;
> +
> + interrupt-parent = <&gpio1>;
> + interrupts = <18 IRQ_TYPE_EDGE_FALLING>;
> +
> + #include <dt-bindings/rtc/pcf85363.h>
> + wakeup-source;
> + interrupt-output-pin = "INTA";
> + quartz-load-capacitance = <PCF85363_QUARTZCAP_12p5pF>;
> + quartz-drive-strength = <PCF85363_QUARTZDRIVE_LOW>;
> + quartz-low-jitter;
> };
>
> diff --git a/include/dt-bindings/rtc/pcf85363.h b/include/dt-bindings/rtc/pcf85363.h
> new file mode 100644
> index 000000000000..2c06c28eb5ff
> --- /dev/null
> +++ b/include/dt-bindings/rtc/pcf85363.h
> @@ -0,0 +1,15 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +#ifndef _DT_BINDINGS_RTC_PCF85363_H
> +#define _DT_BINDINGS_RTC_PCF85363_H
> +
> +/* Quartz capacitance */
> +#define PCF85363_QUARTZCAP_7pF 0
> +#define PCF85363_QUARTZCAP_6pF 1
> +#define PCF85363_QUARTZCAP_12p5pF 2
> +
> +/* Quartz drive strength */
> +#define PCF85363_QUARTZDRIVE_NORMAL 0
> +#define PCF85363_QUARTZDRIVE_LOW 1
> +#define PCF85363_QUARTZDRIVE_HIGH 2
> +
> +#endif /* _DT_BINDINGS_RTC_PCF85363_H */
> --
> 2.17.1
>
next prev parent reply other threads:[~2019-09-02 13:39 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-30 9:17 [1/2] dt-bindings: rtc: pcf85263/pcf85363: add some properties Biwen Li
2019-08-30 9:17 ` [2/2] rtc: pcf85263/pcf85363: support PM, wakeup device, improve performance Biwen Li
2019-08-30 9:44 ` [1/2] dt-bindings: rtc: pcf85263/pcf85363: add some properties Alexandre Belloni
2019-08-30 10:11 ` [EXT] " Biwen Li
2019-09-02 13:39 ` Rob Herring [this message]
2019-09-03 2:15 ` Biwen Li
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