From: Alexandre Belloni <alexandre.belloni@bootlin.com>
To: linux-rtc@vger.kernel.org
Cc: linux-kernel@vger.kernel.org,
Alexandre Belloni <alexandre.belloni@bootlin.com>
Subject: [PATCH 01/17] rtc: define RTC_VL_READ values
Date: Sat, 14 Dec 2019 23:02:43 +0100 [thread overview]
Message-ID: <20191214220259.621996-2-alexandre.belloni@bootlin.com> (raw)
In-Reply-To: <20191214220259.621996-1-alexandre.belloni@bootlin.com>
Currently, the meaning of the value returned by RTC_VL_READ is undocumented
and left to the driver implementation. In order to get more meaningful
values, define a set of values to use as to make clear to userspace what is
the status of the various voltages feeding the RTC.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
---
include/uapi/linux/rtc.h | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/include/uapi/linux/rtc.h b/include/uapi/linux/rtc.h
index 2ad1788968d0..095af360326a 100644
--- a/include/uapi/linux/rtc.h
+++ b/include/uapi/linux/rtc.h
@@ -92,7 +92,12 @@ struct rtc_pll_info {
#define RTC_PLL_GET _IOR('p', 0x11, struct rtc_pll_info) /* Get PLL correction */
#define RTC_PLL_SET _IOW('p', 0x12, struct rtc_pll_info) /* Set PLL correction */
-#define RTC_VL_READ _IOR('p', 0x13, int) /* Voltage low detector */
+#define RTC_VL_DATA_INVALID BIT(0) /* Voltage too low, RTC data is invalid */
+#define RTC_VL_BACKUP_LOW BIT(1) /* Backup voltage is low */
+#define RTC_VL_BACKUP_EMPTY BIT(2) /* Backup empty or not present */
+#define RTC_VL_ACCURACY_LOW BIT(3) /* Voltage is low, RTC accuracy is reduced */
+
+#define RTC_VL_READ _IOR('p', 0x13, unsigned int) /* Voltage low detection */
#define RTC_VL_CLR _IO('p', 0x14) /* Clear voltage low information */
/* interrupt flags */
--
2.23.0
next prev parent reply other threads:[~2019-12-14 22:04 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-14 22:02 [PATCH 00/17] rtc: Unify RTC_VL_READ meaning Alexandre Belloni
2019-12-14 22:02 ` Alexandre Belloni [this message]
2019-12-14 22:02 ` [PATCH 02/17] rtc: Document RTC_VL_READ and RTC_VL_CLR ioctls Alexandre Belloni
2019-12-14 22:02 ` [PATCH 03/17] rtc: abx80x: return meaningful value for RTC_VL_READ Alexandre Belloni
2019-12-14 22:02 ` [PATCH 04/17] rtc: pcf2127: " Alexandre Belloni
2019-12-14 22:02 ` [PATCH 05/17] rtc: pcf8523: " Alexandre Belloni
2019-12-14 22:02 ` [PATCH 06/17] rtc: pcf8563: remove RTC_VL_CLR handling Alexandre Belloni
2019-12-14 22:02 ` [PATCH 07/17] rtc: pcf8563: remove conditional compilation Alexandre Belloni
2019-12-14 22:02 ` [PATCH 08/17] rtc: pcf8563: stop caching voltage_low Alexandre Belloni
2019-12-14 22:02 ` [PATCH 09/17] rtc: pcf8563: return meaningful value for RTC_VL_READ Alexandre Belloni
2019-12-14 22:02 ` [PATCH 10/17] rtc: pcf85063: remove RTC_VL_CLR handling Alexandre Belloni
2019-12-14 22:02 ` [PATCH 11/17] rtc: pcf85063: return meaningful value for RTC_VL_READ Alexandre Belloni
2019-12-14 22:02 ` [PATCH 12/17] rtc: rv3028: remove RTC_VL_CLR handling Alexandre Belloni
2019-12-14 22:02 ` [PATCH 13/17] rtc: rv3028: return meaningful value for RTC_VL_READ Alexandre Belloni
2019-12-14 22:02 ` [PATCH 14/17] rtc: rv8803: avoid clearing RV8803_FLAG_V2F in RTC_VL_CLR Alexandre Belloni
2019-12-14 22:02 ` [PATCH 15/17] rtc: rv8803: return meaningful value for RTC_VL_READ Alexandre Belloni
2019-12-14 22:02 ` [PATCH 16/17] rtc: rx8010: remove RTC_VL_CLR handling Alexandre Belloni
2019-12-14 22:02 ` [PATCH 17/17] rtc: rx8010: return meaningful value for RTC_VL_READ Alexandre Belloni
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