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gerrit.devboardsforandroid.linaro.org / platform / external / u-boot / 46c5391b3d047fefbf6d852130299196061c7d6f / . / drivers / rtc / Kconfig
blob: cad667a4049ea63e6107db6465ff893c7fb68dc4 [file] [log] [blame]
Masahiro Yamada0b11dbf2015-07-26 02:46:26 +0900[diff] [blame]1#
2# RTC drivers configuration
3#
4
5menu "Real Time Clock"
6
Simon Glassdbeda5b2015-04-20 12:37:23 -0600[diff] [blame]7config DM_RTC
8 bool "Enable Driver Model for RTC drivers"
9 depends on DM
AKASHI Takahiro05429b62019-11-13 09:44:49 +0900[diff] [blame]10 select LIB_DATE
Simon Glassdbeda5b2015-04-20 12:37:23 -0600[diff] [blame]11 help
12 Enable drver model for real-time-clock drivers. The RTC uclass
13 then provides the rtc_get()/rtc_set() interface, delegating to
14 drivers to perform the actual functions. See rtc.h for a
15 description of the API.
Masahiro Yamada0b11dbf2015-07-26 02:46:26 +0900[diff] [blame]16
Simon Glass380d4f72018-10-01 12:22:15 -0600[diff] [blame]17config SPL_DM_RTC
18 bool "Enable Driver Model for RTC drivers in SPL"
19 depends on SPL_DM
20 help
21 Enable drver model for real-time-clock drivers. The RTC uclass
22 then provides the rtc_get()/rtc_set() interface, delegating to
23 drivers to perform the actual functions. See rtc.h for a
24 description of the API.
25
26config TPL_DM_RTC
27 bool "Enable Driver Model for RTC drivers in TPL"
28 depends on TPL_DM
29 help
30 Enable drver model for real-time-clock drivers. The RTC uclass
31 then provides the rtc_get()/rtc_set() interface, delegating to
32 drivers to perform the actual functions. See rtc.h for a
33 description of the API.
34
Chuanhua Handb07c442019-07-26 19:24:00 +0800[diff] [blame]35config RTC_ENABLE_32KHZ_OUTPUT
36 bool "Enable RTC 32Khz output"
37 help
38 Some real-time clocks support the output of 32kHz square waves (such as ds3231),
39 the config symbol choose Real Time Clock device 32Khz output feature.
40
Meng Yi8f3a8422016-11-30 15:47:31 +0800[diff] [blame]41config RTC_PCF2127
42 bool "Enable PCF2127 driver"
43 depends on DM_RTC
44 help
Meng Yi45a01942017-01-09 11:24:51 -0700[diff] [blame]45 The PCF2127 is a CMOS Real Time Clock (RTC) and calendar with an integrated
46 Temperature Compensated Crystal (Xtal) Oscillator (TCXO) and a 32.768 kHz quartz
47 crystal optimized for very high accuracy and very low power consumption. The PCF2127
48 has a selectable I2C-bus or SPI-bus, a backup battery switch-over circuit, a
49 programmable watchdog function, a timestamp function, and many other features.
Meng Yi8f3a8422016-11-30 15:47:31 +0800[diff] [blame]50
Chris Packhamd425d602017-04-29 15:20:29 +1200[diff] [blame]51config RTC_DS1307
52 bool "Enable DS1307 driver"
53 depends on DM_RTC
54 help
55 Support for Dallas Semiconductor (now Maxim) DS1307 and DS1338/9 and
56 compatible Real Time Clock devices.
57
Han Nandor0b326fc2019-11-12 08:39:38 +0000[diff] [blame]58config RTC_DS3232
59 bool "Enable DS3232 driver"
60 depends on DM_RTC
61 depends on DM_I2C
62 help
63 Support for Dallas Semiconductor (now Maxim) DS3232 compatible
64 Real Time Clock devices.
65
Heinrich Schuchardt87e99632020-10-22 23:52:14 +0200[diff] [blame]66config RTC_EMULATION
67 bool "Enable emulated RTC"
68 depends on DM_RTC
69 help
70 On a board without hardware clock this software real time clock can be
Heinrich Schuchardtfb71c3f2020-10-30 03:27:22 +0100[diff] [blame]71 used. The initial time may be provided via the environment variable
72 'rtc_emul_epoch' as a decimal string indicating seconds since
73 1970-01-01. If the environment variable is missing, the build time is
74 used to initialize the RTC. The time can be adjusted manually via the
75 'date' command or the 'sntp' command can be used to update the RTC
76 with the time from a network time server. See CONFIG_CMD_SNTP and
77 CONFIG_BOOTP_NTPSERVER. The RTC time is advanced according to CPU
78 ticks.
Heinrich Schuchardt87e99632020-10-22 23:52:14 +0200[diff] [blame]79
Klaus Goger52280312018-03-19 20:32:05 +0100[diff] [blame]80config RTC_ISL1208
81 bool "Enable ISL1208 driver"
82 depends on DM_RTC
83 help
84 The Renesas (formerly Intersil) ISL1208 is a I2C Real Time Clock (RTC) and
85 calendar with automatic leap year correction, 2-byte battery backed SRAM,
86 automatic power switch-over, alarm function and 15 selectable frequency
87 outputs.
88
89 This driver supports reading and writing the RTC/calendar and detects
90 total power failures.
91
Heiko Schocherdddfde52020-10-16 10:41:46 +0200[diff] [blame]92config RTC_PCF8563
93 tristate "Philips PCF8563"
94 help
95 If you say yes here you get support for the Philips PCF8563 RTC
96 and compatible chips.
97
Philipp Tomsicha3716b52018-11-27 22:53:57 +0100[diff] [blame]98config RTC_RV3029
99 bool "Enable RV3029 driver"
100 depends on DM_RTC
101 help
102 The MicroCrystal RV3029 is a I2C Real Time Clock (RTC) with 8-byte
103 battery-backed SRAM.
104
105 This driver supports reading and writing the RTC/calendar and the
106 battery-baced SRAM section.
107
Michael Wallefb9a1ff2019-05-29 01:29:58 +0200[diff] [blame]108config RTC_RV8803
109 bool "Enable RV8803 driver"
110 depends on DM_RTC
111 help
112 The Micro Crystal RV8803 is a high accuracy, ultra-low power I2C
113 Real Time Clock (RTC) with temperature compensation.
114
115 This driver supports reading and writing the RTC/calendar and
116 detects total power failures.
117
Nandor Han958a2102018-01-10 20:31:27 +0100[diff] [blame]118config RTC_RX8010SJ
119 bool "Enable RX8010SJ driver"
120 depends on DM_RTC
121 help
122 Support for Epson RX8010SJ Real Time Clock devices.
123
Heiko Schochera7e6d0c2019-07-16 05:31:33 +0200[diff] [blame]124config RTC_RX8025
125 bool "Enable RX8025 driver"
126 help
127 Support for Epson RX8025 Real Time Clock devices.
128
Heinrich Schuchardtb19886b2018-06-29 00:34:16 +0200[diff] [blame]129config RTC_PL031
130 bool "Enable ARM AMBA PL031 RTC driver"
131 help
132 The ARM PrimeCell Real Time Clock (PL031) is an optional SoC
133 peripheral based on the Advanced Microcontroller Bus Architecture
134 (AMBA). It is emulated in QEMU virtual ARM machines.
135
Chris Packhamd3671df2018-05-28 23:39:58 +1200[diff] [blame]136config RTC_MV
137 bool "Enable Marvell RTC driver"
138 depends on DM_RTC
139 help
140 Enable Marvell RTC driver. This driver supports the rtc that is present
141 on some Marvell SoCs.
142
Nandor Handa5337a2017-11-08 15:35:14 +0000[diff] [blame]143config RTC_S35392A
144 bool "Enable S35392A driver"
145 select BITREVERSE
146 help
147 Enable s35392a driver which provides rtc get and set function.
148
Simon Glass10761072018-10-01 12:22:14 -0600[diff] [blame]149config RTC_MC146818
150 bool "Enable MC146818 driver"
151 help
152 This is a widely used real-time clock chip originally by Motorola
153 and now available from NXP. It includes a battery-backed real-time
154 clock with a wide array of features and 50 bytes of general-purpose,
155 battery-backed RAM. The driver supports access to the clock and RAM.
156
Lukasz Majewskid27db672018-11-22 14:54:31 +0100[diff] [blame]157config RTC_M41T62
158 bool "Enable M41T62 driver"
159 help
160 Enable driver for ST's M41T62 compatible RTC devices (like RV-4162).
161 It is a serial (I2C) real-time clock (RTC) with alarm.
162
Patrick Delaunay1f99eaf2019-07-22 11:02:34 +0200[diff] [blame]163config RTC_STM32
164 bool "Enable STM32 RTC driver"
165 depends on DM_RTC
166 help
167 Enable STM32 RTC driver. This driver supports the rtc that is present
168 on some STM32 SoCs.
Masahiro Yamada0b11dbf2015-07-26 02:46:26 +0900[diff] [blame]169endmenu