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Date:   Mon, 20 Feb 2017 08:35:34 +0100
From:   Sebastian Reichel <sre@...nel.org>
To:     Sebastian Reichel <sre@...nel.org>,
        Tony Lindgren <tony@...mide.com>,
        Alessandro Zummo <a.zummo@...ertech.it>,
        Alexandre Belloni <alexandre.belloni@...e-electrons.com>
Cc:     rtc-linux@...glegroups.com, linux-kernel@...r.kernel.org
Subject: [PATCH 0/1] Motorola CPCAP PMIC RTC

Hi,

Here is a driver for the RTC found inside of the
Motorola Droid 4 based on linux-next 2017021.
I tried to set & get the time using hwclock and
used ./tools/testing/selftests/timers/rtctest.c:

$ ./rtctest 

			RTC Driver Test Example.

Counting 5 update (1/sec) interrupts from reading /dev/rtc0: 1 2 3 4 5
Again, from using select(2) on /dev/rtc: 1 2 3 4 5

Current RTC date/time is 20-2-2017, 07:11:22.
Alarm time now set to 07:11:27.
Waiting 5 seconds for alarm... okay. Alarm rang.

Periodic IRQ rate is 1Hz.
Counting 20 interrupts at:
2Hz:	 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
4Hz:	 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
8Hz:	 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
16Hz:	 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
32Hz:	 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
64Hz:	 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

			 *** Test complete ***

I did not include a patch for omap4-droid4-xt894.dts,
since the CPCAP DT entry has not yet been added. The
following DT snippet can be used for testing on droid4:

&cpcap {
	cpcap_rtc: rtc {
		compatible = "motorola,cpcap-rtc";

		interrupt-parent = <&cpcap>;
		interrupts = <39 IRQ_TYPE_NONE>, <26 IRQ_TYPE_NONE>;
	};
};

-- Sebastian

Sebastian Reichel (1):
  rtc: cpcap: new rtc driver

 .../devicetree/bindings/rtc/cpcap-rtc.txt          |  13 +
 drivers/rtc/Kconfig                                |   7 +
 drivers/rtc/Makefile                               |   1 +
 drivers/rtc/rtc-cpcap.c                            | 318 +++++++++++++++++++++
 4 files changed, 339 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/rtc/cpcap-rtc.txt
 create mode 100644 drivers/rtc/rtc-cpcap.c

-- 
2.11.0

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