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charset="utf-8" These Real Time Clocks are managed by the rtc-pcf85363 device driver, which now supports the quartz-load-femtofarads property. Signed-off-by: Javier Carrasco Reviewed-by: Krzysztof Kozlowski --- v2: - create new bindings instead of adding conditional properties to an existing one. .../devicetree/bindings/rtc/nxp,pcf85363.yaml | 60 +++++++++++++++++++ .../devicetree/bindings/rtc/nxp,pcf8563.yaml | 2 - 2 files changed, 60 insertions(+), 2 deletions(-) create mode 100644 Documentation/devicetree/bindings/rtc/nxp,pcf85363.yaml diff --git a/Documentation/devicetree/bindings/rtc/nxp,pcf85363.yaml b/Docu= mentation/devicetree/bindings/rtc/nxp,pcf85363.yaml new file mode 100644 index 000000000000..52aa3e2091e9 --- /dev/null +++ b/Documentation/devicetree/bindings/rtc/nxp,pcf85363.yaml @@ -0,0 +1,60 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/rtc/nxp,pcf85363.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Philips PCF85263/PCF85363 Real Time Clock + +maintainers: + - Alexandre Belloni + +allOf: + - $ref: rtc.yaml# + +properties: + compatible: + enum: + - nxp,pcf85263 + - nxp,pcf85363 + + reg: + maxItems: 1 + + "#clock-cells": + const: 0 + + clock-output-names: + maxItems: 1 + + interrupts: + maxItems: 1 + + quartz-load-femtofarads: + description: + The capacitive load of the quartz(x-tal). + enum: [6000, 7000, 12500] + default: 7000 + + start-year: true + wakeup-source: true + +required: + - compatible + - reg + +additionalProperties: false + +examples: + - | + i2c { + #address-cells =3D <1>; + #size-cells =3D <0>; + + rtc@51 { + compatible =3D "nxp,pcf85363"; + reg =3D <0x51>; + #clock-cells =3D <0>; + quartz-load-femtofarads =3D <12500>; + }; + }; diff --git a/Documentation/devicetree/bindings/rtc/nxp,pcf8563.yaml b/Docum= entation/devicetree/bindings/rtc/nxp,pcf8563.yaml index a98b72752349..22909a96123e 100644 --- a/Documentation/devicetree/bindings/rtc/nxp,pcf8563.yaml +++ b/Documentation/devicetree/bindings/rtc/nxp,pcf8563.yaml @@ -19,8 +19,6 @@ properties: - microcrystal,rv8564 - nxp,pca8565 - nxp,pcf8563 - - nxp,pcf85263 - - nxp,pcf85363 =20 reg: maxItems: 1 --=20 2.37.2 From nobody Thu Sep 11 22:52:21 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9005DC636D4 for ; Wed, 15 Feb 2023 08:19:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233882AbjBOITC (ORCPT ); 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charset="utf-8" The quartz oscillator load capacitance of the PCF85263 and PCF85363 can be adjusted to 6 pF, 7 pF (default) and 12.5 pF with the CL[1:0] bits in the oscillator control register (address 25h). Signed-off-by: Javier Carrasco --- v2: - simple assignment operator instead of |=3D for the "value" variable. drivers/rtc/rtc-pcf85363.c | 37 ++++++++++++++++++++++++++++++++++++- 1 file changed, 36 insertions(+), 1 deletion(-) diff --git a/drivers/rtc/rtc-pcf85363.c b/drivers/rtc/rtc-pcf85363.c index c05b722f0060..219fbca8c47f 100644 --- a/drivers/rtc/rtc-pcf85363.c +++ b/drivers/rtc/rtc-pcf85363.c @@ -101,6 +101,10 @@ #define PIN_IO_INTA_OUT 2 #define PIN_IO_INTA_HIZ 3 =20 +#define OSC_CAP_SEL GENMASK(1, 0) +#define OSC_CAP_6000 0x01 +#define OSC_CAP_12500 0x02 + #define STOP_EN_STOP BIT(0) =20 #define RESET_CPR 0xa4 @@ -117,6 +121,32 @@ struct pcf85x63_config { unsigned int num_nvram; }; =20 +static int pcf85363_load_capacitance(struct pcf85363 *pcf85363, struct dev= ice_node *node) +{ + u32 load =3D 7000; + u8 value =3D 0; + + of_property_read_u32(node, "quartz-load-femtofarads", &load); + + switch (load) { + default: + dev_warn(&pcf85363->rtc->dev, "Unknown quartz-load-femtofarads value: %d= . Assuming 7000", + load); + fallthrough; + case 7000: + break; + case 6000: + value =3D OSC_CAP_6000; + break; + case 12500: + value =3D OSC_CAP_12500; + break; + } + + return regmap_update_bits(pcf85363->regmap, CTRL_OSCILLATOR, + OSC_CAP_SEL, value); +} + static int pcf85363_rtc_read_time(struct device *dev, struct rtc_time *tm) { struct pcf85363 *pcf85363 =3D dev_get_drvdata(dev); @@ -372,7 +402,7 @@ static int pcf85363_probe(struct i2c_client *client) .reg_write =3D pcf85363_nvram_write, }, }; - int ret, i; + int ret, i, err; =20 if (data) config =3D data; @@ -394,6 +424,11 @@ static int pcf85363_probe(struct i2c_client *client) if (IS_ERR(pcf85363->rtc)) return PTR_ERR(pcf85363->rtc); =20 + err =3D pcf85363_load_capacitance(pcf85363, client->dev.of_node); + if (err < 0) + dev_warn(&client->dev, "failed to set xtal load capacitance: %d", + err); + pcf85363->rtc->ops =3D &rtc_ops; pcf85363->rtc->range_min =3D RTC_TIMESTAMP_BEGIN_2000; pcf85363->rtc->range_max =3D RTC_TIMESTAMP_END_2099; --=20 2.37.2