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/Linux-v5.10/Documentation/devicetree/bindings/rtc/
Ddallas,ds1390.txt1 * Dallas DS1390 SPI Serial Real-Time Clock
4 - compatible: Should contain "dallas,ds1390".
5 - reg: SPI address for chip
8 - trickle-resistor-ohms : Selected resistor for trickle charger
10 Should be given if trickle charger should be enabled
11 - trickle-diode-disable : Do not use internal trickle charger diode
12 Should be given if internal trickle charger diode should be disabled
16 trickle-resistor-ohms = <250>;
Dti,bq32k.txt1 * TI BQ32000 I2C Serial Real-Time Clock
4 - compatible: Should contain "ti,bq32000".
5 - reg: I2C address for chip
8 - trickle-resistor-ohms : Selected resistor for trickle charger
10 Should be given if trickle charger should be enabled
11 - trickle-diode-disable : Do not use internal trickle charger diode
12 Should be given if internal trickle charger diode should be disabled
16 trickle-resistor-ohms = <1120>;
Drtc-ds1307.txt4 - compatible: should be one of:
23 - reg: I2C bus address of the device
26 - interrupts: rtc alarm interrupt.
27 - clock-output-names: From common clock binding to override the default output
29 - wakeup-source: Enables wake up of host system on alarm
30 - trickle-resistor-ohms : ds1339, ds1340 and ds 1388 only
31 Selected resistor for trickle charger
33 Should be given if trickle charger should be enabled
34 - aux-voltage-chargeable: ds1339, ds1340, ds1388 and rx8130 only
40 - trickle-diode-disable : ds1339, ds1340 and ds1388 only
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Dmicrocrystal,rv3032.yaml1 # SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Microchip RV-3032 RTC Device Tree Bindings
10 - $ref: "rtc.yaml#"
13 - Alexandre Belloni <alexandre.belloni@bootlin.com>
25 start-year: true
27 trickle-resistor-ohms:
29 - 1000
30 - 2000
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Drtc.yaml1 # SPDX-License-Identifier: GPL-2.0
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Alexandre Belloni <alexandre.belloni@bootlin.com>
18 pattern: "^rtc(@.*|-[0-9a-f])*$"
20 aux-voltage-chargeable:
29 quartz-load-femtofarads:
32 The capacitive load of the quartz(x-tal), expressed in femto
36 start-year:
42 trickle-diode-disable:
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/Linux-v5.10/drivers/rtc/
Drtc-bq32k.c1 // SPDX-License-Identifier: GPL-2.0-only
32 #define BQ32K_TCH2 0x08 /* Trickle charge enable */
33 #define BQ32K_CFG2 0x09 /* Trickle charger control */
34 #define BQ32K_TCFE BIT(6) /* Trickle charge FET bypass */
57 .addr = client->addr, in bq32k_read()
62 .addr = client->addr, in bq32k_read()
69 if (i2c_transfer(client->adapter, msgs, 2) == 2) in bq32k_read()
72 return -EIO; in bq32k_read()
86 return -EIO; in bq32k_write()
103 return -EINVAL; in bq32k_rtc_read_time()
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Drtc-ds1390.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * rtc-ds1390.c -- driver for the Dallas/Maxim DS1390/93/94 SPI RTC
10 * (alarms, trickle charger, different control registers) are unavailable.
74 return -EINVAL; in ds1390_get_reg()
77 chip->txrx_buf[0] = address & 0x7f; in ds1390_get_reg()
79 status = spi_write_then_read(spi, chip->txrx_buf, 1, chip->txrx_buf, 1); in ds1390_get_reg()
83 *data = chip->txrx_buf[0]; in ds1390_get_reg()
90 u32 ohms = 0; in ds1390_trickle_of_init() local
93 if (of_property_read_u32(spi->dev.of_node, "trickle-resistor-ohms", in ds1390_trickle_of_init()
94 &ohms)) in ds1390_trickle_of_init()
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Drtc-rv3029c2.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * Micro Crystal RV-3029 / RV-3049 rtc class driver
5 * Author: Gregory Hermant <gregory.hermant@calao-systems.com>
19 #include <linux/hwmon-sysfs.h>
106 #define RV3029_CONTROL_E2P_XOFFS_SIGN BIT(7) /* Sign: 1->pos, 0->neg */
127 for (i = 100; i > 0; i--) { in rv3029_eeprom_busywait()
128 ret = regmap_read(rv3029->regmap, RV3029_STATUS, &sr); in rv3029_eeprom_busywait()
136 dev_err(rv3029->dev, "EEPROM busy wait timeout.\n"); in rv3029_eeprom_busywait()
137 return -ETIMEDOUT; in rv3029_eeprom_busywait()
145 /* Re-enable eeprom refresh */ in rv3029_eeprom_exit()
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Drtc-rv3028.c1 // SPDX-License-Identifier: GPL-2.0
11 #include <linux/clk-provider.h>
105 struct rv3028_data *rv3028 = dev_get_drvdata(dev->parent); in timestamp0_store()
107 regmap_update_bits(rv3028->regmap, RV3028_EVT_CTRL, RV3028_EVT_CTRL_TSR, in timestamp0_store()
116 struct rv3028_data *rv3028 = dev_get_drvdata(dev->parent); in timestamp0_show()
121 ret = regmap_read(rv3028->regmap, RV3028_TS_COUNT, &count); in timestamp0_show()
128 ret = regmap_bulk_read(rv3028->regmap, RV3028_TS_SEC, date, in timestamp0_show()
137 tm.tm_mon = bcd2bin(date[4]) - 1; in timestamp0_show()
153 struct rv3028_data *rv3028 = dev_get_drvdata(dev->parent); in timestamp0_count_show()
156 ret = regmap_read(rv3028->regmap, RV3028_TS_COUNT, &count); in timestamp0_count_show()
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Drtc-rv3032.c1 // SPDX-License-Identifier: GPL-2.0
12 #include <linux/clk-provider.h>
122 return regmap_update_bits(rv3032->regmap, RV3032_CTRL1, RV3032_CTRL1_EERD, 0); in rv3032_exit_eerd()
130 ret = regmap_read(rv3032->regmap, RV3032_CTRL1, &ctrl1); in rv3032_enter_eerd()
138 ret = regmap_update_bits(rv3032->regmap, RV3032_CTRL1, in rv3032_enter_eerd()
143 ret = regmap_read_poll_timeout(rv3032->regmap, RV3032_TLSB, status, in rv3032_enter_eerd()
165 ret = regmap_update_bits(rv3032->regmap, reg, mask, val); in rv3032_update_cfg()
169 ret = regmap_write(rv3032->regmap, RV3032_EEPROM_CMD, RV3032_EEPROM_CMD_UPDATE); in rv3032_update_cfg()
175 ret = regmap_read_poll_timeout(rv3032->regmap, RV3032_TLSB, status, in rv3032_update_cfg()
191 if (regmap_read(rv3032->regmap, RV3032_STATUS, &status) < 0 || in rv3032_handle_irq()
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Drtc-ab-eoz9.c1 // SPDX-License-Identifier: GPL-2.0
3 * Real Time Clock driver for AB-RTCMC-32.768kHz-EOZ9 chip.
15 #include <linux/hwmon-sysfs.h>
62 #define ABEOZ953_TEMP_MIN -60
84 struct regmap *regmap = data->regmap; in abeoz9_check_validity()
96 dev_warn(dev, "power-on reset detected, date is invalid\n"); in abeoz9_check_validity()
97 return -EINVAL; in abeoz9_check_validity()
103 return -EINVAL; in abeoz9_check_validity()
109 return -EINVAL; in abeoz9_check_validity()
134 ret = regmap_bulk_read(data->regmap, ABEOZ9_REG_SEC, in abeoz9_rtc_get_time()
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Drtc-ds1307.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * rtc-ds1307.c - RTC driver for some mostly-compatible I2C chips.
22 #include <linux/hwmon-sysfs.h>
23 #include <linux/clk-provider.h>
28 * We can't determine type by probing, but if we expect pre-Linux code
30 * setting the date and time), Linux can ignore the non-clock features.
54 #define DS1307_REG_SECS 0x00 /* 00-59 */
58 #define DS1307_REG_MIN 0x01 /* 00-59 */
60 #define DS1307_REG_HOUR 0x02 /* 00-23, or 1-12{am,pm} */
65 #define DS1307_REG_WDAY 0x03 /* 01-07 */
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/Linux-v5.10/arch/arm/boot/dts/
Dimx53-tx53.dtsi2 * Copyright 2012-2017 <LW@KARO-electronics.de>
3 * based on imx53-qsb.dts
7 * This file is dual-licensed: you can use it either under the terms
46 #include <dt-bindings/gpio/gpio.h>
49 model = "Ka-Ro electronics TX53 module";
62 reg-can-xcvr = &reg_can_xcvr;
69 clock-frequency = <0>;
73 mclk: clock-mclk {
74 compatible = "fixed-clock";
75 #clock-cells = <0>;
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Dimx6qdl-tx6.dtsi2 * Copyright 2014-2017 Lothar Waßmann <LW@KARO-electronics.de>
4 * This file is dual-licensed: you can use it either under the terms
42 #include <dt-bindings/gpio/gpio.h>
43 #include <dt-bindings/input/input.h>
44 #include <dt-bindings/interrupt-controller/irq.h>
45 #include <dt-bindings/pwm/pwm.h>
46 #include <dt-bindings/sound/fsl-imx-audmux.h>
53 lcdif-23bit-pins-a = &pinctrl_disp0_1;
54 lcdif-24bit-pins-a = &pinctrl_disp0_2;
57 reg-can-xcvr = &reg_can_xcvr;
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Dimx28-tx28.dts3 * Copyright 2013-2017 Lothar Waßmann <LW@KARO-electronics.de>
5 * This file is dual-licensed: you can use it either under the terms
43 /dts-v1/;
45 #include <dt-bindings/gpio/gpio.h>
46 #include <dt-bindings/interrupt-controller/irq.h>
49 model = "Ka-Ro electronics TX28 module";
70 reg = <0x40000000 0>; /* will be filled in by U-Boot */
74 compatible = "w1-gpio";
79 reg_usb0_vbus: regulator-usb0-vbus {
80 compatible = "regulator-fixed";
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Dam335x-sl50.dts1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) 2015 Toby Churchill - http://www.toby-churchill.com/
5 /dts-v1/;
8 #include <dt-bindings/pwm/pwm.h>
9 #include <dt-bindings/interrupt-controller/irq.h>
13 compatible = "tcl,am335x-sl50", "ti,am33xx";
17 cpu0-supply = <&dcdc2_reg>;
27 stdout-path = &uart0;
31 compatible = "gpio-leds";
32 pinctrl-names = "default";
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