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/linux/Documentation/devicetree/bindings/rtc/
H A Dnxp,s32g-rtc.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/rtc/nxp,s32g-rtc.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: NXP S32G2/S32G3 Real Time Clock (RTC)
10 - Bogdan Hamciuc <bogdan.hamciuc@nxp.com>
11 - Ciprian Marian Costea <ciprianmarian.costea@nxp.com>
14 RTC hardware module present on S32G2/S32G3 SoCs is used as a wakeup source.
15 It is not kept alive during system reset and it is not battery-powered.
18 - $ref: rtc.yaml#
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/linux/drivers/rtc/
H A Drtc-s32g.c1 // SPDX-License-Identifier: GPL-2.0-or-later
11 #include <linux/rtc.h>
33 * S32G2 and S32G3 SoCs have RTC clock source1 reserved and
39 * S32G RTC module has a 512 value and a 32 value hardware frequency
41 * counter ranges by lowering the RTC frequency.
84 status = readl(priv->rtc_base + RTCS_OFFSET); in s32g_rtc_handler()
87 writel(0x0, priv->rtc_base + APIVAL_OFFSET); in s32g_rtc_handler()
88 writel(status | RTCS_APIF, priv->rtc_base + RTCS_OFFSET); in s32g_rtc_handler()
91 rtc_update_irq(priv->rdev, 1, RTC_IRQF | RTC_AF); in s32g_rtc_handler()
97 * The function is not really getting time from the RTC since the S32G RTC
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H A DKconfig1 # SPDX-License-Identifier: GPL-2.0-only
3 # RTC class/drivers configuration
19 Generic RTC class support. If you say yes here, you will
26 bool "Set system time from RTC on startup and resume"
30 the value read from a specified RTC device. This is useful to avoid
34 string "RTC used to set the system time"
38 The RTC device that will be used to (re)initialize the system
44 This clock should be battery-backed, so that it reads the correct
45 time when the system boots from a power-off state. Otherwise, your
50 sleep states. Do not specify an RTC here unless it stays powered
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