2 # RTC drivers configuration
8 bool "Enable Driver Model for RTC drivers"
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.
18 bool "Enable Driver Model for RTC drivers in SPL"
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.
27 bool "Enable Driver Model for RTC drivers in TPL"
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.
35 config RTC_ENABLE_32KHZ_OUTPUT
36 bool "Enable RTC 32Khz output"
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.
42 bool "Enable PCF2127 driver"
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.
52 bool "Enable DS1307 driver"
55 Support for Dallas Semiconductor (now Maxim) DS1307 and DS1338/9 and
56 compatible Real Time Clock devices.
59 bool "Enable DS3232 driver"
63 Support for Dallas Semiconductor (now Maxim) DS3232 compatible
64 Real Time Clock devices.
67 bool "Enable emulated RTC"
70 On a board without hardware clock this software real time clock can be
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
81 bool "Enable ISL1208 driver"
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
89 This driver supports reading and writing the RTC/calendar and detects
93 tristate "Philips PCF8563"
95 If you say yes here you get support for the Philips PCF8563 RTC
99 bool "Enable RV3029 driver"
102 The MicroCrystal RV3029 is a I2C Real Time Clock (RTC) with 8-byte
105 This driver supports reading and writing the RTC/calendar and the
106 battery-baced SRAM section.
109 bool "Enable RV8803 driver"
112 The Micro Crystal RV8803 is a high accuracy, ultra-low power I2C
113 Real Time Clock (RTC) with temperature compensation.
115 This driver supports reading and writing the RTC/calendar and
116 detects total power failures.
119 bool "Enable RX8010SJ driver"
122 Support for Epson RX8010SJ Real Time Clock devices.
125 bool "Enable RX8025 driver"
127 Support for Epson RX8025 Real Time Clock devices.
130 bool "Enable ARM AMBA PL031 RTC driver"
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.
137 bool "Enable Marvell RTC driver"
140 Enable Marvell RTC driver. This driver supports the rtc that is present
141 on some Marvell SoCs.
144 bool "Enable S35392A driver"
147 Enable s35392a driver which provides rtc get and set function.
150 bool "Enable MC146818 driver"
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.
158 bool "Enable M41T62 driver"
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.
164 bool "Enable STM32 RTC driver"
167 Enable STM32 RTC driver. This driver supports the rtc that is present