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/linux/Documentation/devicetree/bindings/rtc/
H A 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>;
H A Drtc.yaml1 # SPDX-License-Identifier: GPL-2.0
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Alexandre Belloni <alexandre.belloni@bootlin.com>
18 pattern: "^rtc(@.*|-([0-9]|[1-9][0-9]+))?$"
20 aux-voltage-chargeable:
29 quartz-load-femtofarads:
31 The capacitive load of the quartz(x-tal), expressed in femto
35 start-year:
41 trickle-diode-disable:
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H A Drtc-ds1307.yaml1 # SPDX-License-Identifier: GPL-2.0
3 ---
4 $id: http://devicetree.org/schemas/rtc/rtc-ds1307.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Alexandre Belloni <alexandre.belloni@bootlin.com>
15 - enum:
16 - dallas,ds1307
17 - dallas,ds1308
18 - dallas,ds1337
19 - dallas,ds1338
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H A Depson,rx8900.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: EPSON RX8900 / Microcrystal RV8803 Real-Time Clock
10 - Marek Vasut <marex@denx.de>
13 - $ref: rtc.yaml#
18 - epson,rx8804
19 - epson,rx8900
20 - microcrystal,rv8803
25 epson,vdet-disable:
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H A Dti,bq32000.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: TI BQ32000 I2C Serial Real-Time Clock
10 - Alexandre Belloni <alexandre.belloni@bootlin.com>
13 - $ref: rtc.yaml#
25 start-year: true
27 trickle-resistor-ohms:
30 trickle-diode-disable: true
33 - compatible
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/linux/drivers/rtc/
H A Drtc-bq32k.c1 // SPDX-License-Identifier: GPL-2.0-only
33 #define BQ32K_TCH2 0x08 /* Trickle charge enable */
34 #define BQ32K_CFG2 0x09 /* Trickle charger control */
35 #define BQ32K_TCFE BIT(6) /* Trickle charge FET bypass */
58 .addr = client->addr, in bq32k_read()
63 .addr = client->addr, in bq32k_read()
70 if (i2c_transfer(client->adapter, msgs, 2) == 2) in bq32k_read()
73 return -EIO; in bq32k_read()
87 return -EIO; in bq32k_write()
104 return -EINVAL; in bq32k_rtc_read_time()
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H A Drtc-sunplus.c1 // SPDX-License-Identifier: GPL-2.0
69 *secs = (unsigned long)readl(sp_rtc->reg_base + RTC_TIMER_OUT); in sp_get_seconds()
76 writel((u32)secs, sp_rtc->reg_base + RTC_TIMER_SET); in sp_set_seconds()
105 alarm_time = rtc_tm_to_time64(&alrm->time); in sp_rtc_set_alarm()
107 writel((u32)alarm_time, sp_rtc->reg_base + RTC_ALARM_SET); in sp_rtc_set_alarm()
117 alarm_time = readl(sp_rtc->reg_base + RTC_ALARM_SET); in sp_rtc_read_alarm()
121 alrm->enabled = 0; in sp_rtc_read_alarm()
123 alrm->enabled = 1; in sp_rtc_read_alarm()
125 rtc_time64_to_tm((unsigned long)(alarm_time), &alrm->time); in sp_rtc_read_alarm()
139 sp_rtc->reg_base + RTC_CTRL); in sp_rtc_alarm_irq_enable()
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H A 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()
93 if (of_property_read_u32(spi->dev.of_node, "trickle-resistor-ohms", in ds1390_trickle_of_init()
99 if (of_property_read_bool(spi->dev.of_node, "trickle-diode-disable")) in ds1390_trickle_of_init()
116 dev_warn(&spi->dev, in ds1390_trickle_of_init()
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H A Drtc-ds1307.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * rtc-ds1307.c - RTC driver for some mostly-compatible I2C chips.
23 #include <linux/hwmon-sysfs.h>
24 #include <linux/clk-provider.h>
29 * We can't determine type by probing, but if we expect pre-Linux code
31 * setting the date and time), Linux can ignore the non-clock features.
56 #define DS1307_REG_SECS 0x00 /* 00-59 */
60 #define DS1307_REG_MIN 0x01 /* 00-59 */
62 #define DS1307_REG_HOUR 0x02 /* 00-23, or 1-12{am,pm} */
67 #define DS1307_REG_WDAY 0x03 /* 01-07 */
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H A Drtc-abx80x.c1 // SPDX-License-Identifier: GPL-2.0
6 * Copyright 2014-2015 Macq S.A.
135 dev_err(&client->dev, "Unable to write configuration key\n"); in abx80x_write_config_key()
136 return -EIO; in abx80x_write_config_key()
148 dev_err(&client->dev, in abx80x_is_rc_mode()
162 * Write the configuration key register to enable access to the Trickle in abx80x_enable_trickle_charger()
166 return -EIO; in abx80x_enable_trickle_charger()
172 dev_err(&client->dev, "Unable to write trickle register\n"); in abx80x_enable_trickle_charger()
173 return -EIO; in abx80x_enable_trickle_charger()
197 return -EINVAL; in abx80x_rtc_read_time()
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H A Drtc-max31335.c1 // SPDX-License-Identifier: GPL-2.0
16 #include <linux/clk-provider.h>
230 ret = regmap_bulk_read(max31335->regmap, MAX31335_SECONDS, date, in max31335_read_time()
235 tm->tm_sec = bcd2bin(date[0] & 0x7f); in max31335_read_time()
236 tm->tm_min = bcd2bin(date[1] & 0x7f); in max31335_read_time()
237 tm->tm_hour = bcd2bin(date[2] & 0x3f); in max31335_read_time()
238 tm->tm_wday = bcd2bin(date[3] & 0x7) - 1; in max31335_read_time()
239 tm->tm_mday = bcd2bin(date[4] & 0x3f); in max31335_read_time()
240 tm->tm_mon = bcd2bin(date[5] & 0x1f) - 1; in max31335_read_time()
241 tm->tm_year = bcd2bin(date[6]) + 100; in max31335_read_time()
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H A Drtc-ds1305.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * rtc-ds1305.c -- driver for DS1305 and DS1306 SPI RTC chips
21 * otherwise you're reading it. All non-bitmask values are BCD.
27 * - Need fancy "hours" encoding in 12hour mode
28 * - Don't rely on the "day-of-week" field (or tm_wday)
29 * - Are a 21st-century clock (2000 <= year < 2100)
50 * NOTE ALSO that while we could generate once-a-second IRQs (UIE), we
76 /* trickle bits are defined in <linux/spi/ds1305.h> */
98 /*----------------------------------------------------------------------*/
101 * Utilities ... tolerate 12-hour AM/PM notation in case of non-Linux
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H A Drtc-rv8803.c1 // SPDX-License-Identifier: GPL-2.0
89 while ((ret == -ENXIO || ret == -EIO) && --try); in rv8803_read_reg()
91 dev_err(&client->dev, "Unable to read register 0x%02x\n", reg); in rv8803_read_reg()
104 while ((ret == -ENXIO || ret == -EIO) && --try); in rv8803_read_regs()
106 dev_err(&client->dev, in rv8803_read_regs()
108 reg, reg + count - 1); in rv8803_read_regs()
109 return ret < 0 ? ret : -EIO; in rv8803_read_regs()
122 while ((ret == -ENXIO || ret == -EIO) && --try); in rv8803_write_reg()
124 dev_err(&client->dev, "Unable to write register 0x%02x\n", reg); in rv8803_write_reg()
138 while ((ret == -ENXIO || ret == -EIO) && --try); in rv8803_write_regs()
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/linux/arch/arm/boot/dts/nxp/imx/
H A 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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H A 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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/linux/arch/arm/boot/dts/nxp/mxs/
H A Dimx28-tx28.dts1 // SPDX-License-Identifier: GPL-2.0 OR MIT
4 * Copyright 2013-2017 Lothar Waßmann <LW@KARO-electronics.de>
7 /dts-v1/;
9 #include <dt-bindings/gpio/gpio.h>
10 #include <dt-bindings/interrupt-controller/irq.h>
13 model = "Ka-Ro electronics TX28 module";
34 reg = <0x40000000 0>; /* will be filled in by U-Boot */
38 compatible = "w1-gpio";
43 reg_usb0_vbus: regulator-usb0-vbus {
44 compatible = "regulator-fixed";
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