linux-kernel - [PATCH v3 00/10] rtc: max77686: Extend driver and add max77802 support

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Message-Id: <1453836020-29579-1-git-send-email-javier@osg.samsung.com>
Date:	Tue, 26 Jan 2016 16:20:10 -0300
From:	Javier Martinez Canillas <javier@....samsung.com>
To:	linux-kernel@...r.kernel.org
Cc:	Kukjin Kim <kgene@...nel.org>, rtc-linux@...glegroups.com,
	Chanwoo Choi <cw00.choi@...sung.com>,
	Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
	Krzysztof Kozlowski <k.kozlowski@...sung.com>,
	Laxman Dewangan <ldewangan@...dia.com>,
	linux-samsung-soc@...r.kernel.org,
	Javier Martinez Canillas <javier@....samsung.com>,
	Arnd Bergmann <arnd@...db.de>, Olof Johansson <olof@...om.net>,
	linux-arm-kernel@...ts.infradead.org
Subject: [PATCH v3 00/10] rtc: max77686: Extend driver and add max77802 support

Hello,

On a recent disussion [0] with Krzysztof Kozlowski and Laxman Dewangan,
we came to the conclusion that the max77686 and max77802 RTC are almost
the same with only a few differences so there shouldn't be two separate
drivers and is better to extend max77686 driver and delete rtc-max77802.

By making the driver more generic, other RTC IP blocks from Maxim PMICs
could be supported as well like the max77620.

This is a v3 of a series that do this, that address issues pointed out
by Krzysztof Kozlowski. The v1 and v2 can be found at [1] and [2].

I've tested this patch-set on an Exynos5800 Peach Pi Chromebook that has
a max77802 PMIC and the RTC was working correctly but I don't have a
machine with max77686 so I will really appreaciate if someone can test
that no regressions were introduced.

[0]: http://www.spinics.net/lists/devicetree/msg110348.html
[1]: https://lwn.net/Articles/672568/
[2]: https://lkml.org/lkml/2016/1/25/767

Changes in v3:
- Add Krzysztof Kozlowski's Reviewed-by and Tested-by to patch #1.
- Add Laxman Dewangan's Acked-by tag to patch #1.
- Add Krzysztof Kozlowski's Tested-by tag to patch #2.
- Add Laxman Dewangan's Acked-by tag to patch #2.
- Use ARRAY_SIZE() in all places. Suggested by Laxman Dewangan.
- Add Krzysztof Kozlowski's Tested-by tag to patch #3.
- Add Laxman Dewangan's Acked-by tag to patch #3.
- Fix max77686 delay. Suggested by Krzysztof Kozlowski.
- Assign mask to u8 instead of int. Suggested by Krzysztof Kozlowski.
- Add Laxman Dewangan's Acked-by tag to patch #4.
- Add Laxman Dewangan's Acked-by tag to patch #5.
- Add Laxman Dewangan's Acked-by tag to patch #6.
- Add Laxman Dewangan's Acked-by tag to patch #7.
- Add Laxman Dewangan's Acked-by tag to patch #8.

Changes in v2:
- Add Krzysztof Kozlowski's Reviewed-by tag to patch #2.
- Add Krzysztof Kozlowski's Reviewed-by tag to patch #3.
- Fix typo error in changelog. Suggested by Krzysztof Kozlowski.
- Add a max77686 prefix to rtc_driver_data. Suggested by Krzysztof Kozlowski.
- Comment about the .delay and .mask fields. Suggested by Krzysztof Kozlowski.
- Change .mask type to u8. Suggested by Krzysztof Kozlowski.
- Make .drv_data field const. Suggested by Krzysztof Kozlowski.
- Don't cast to drop const on .drv_data asign. Suggested by Krzysztof Kozlowski.
- Use platform_get_device_id() macro. Suggested by Krzysztof Kozlowski.
- Rename rtc_reg to max77686_rtc_reg_offset. Suggested by Krzysztof Kozlowski.
- Comment what's mapped by max77686_map. Suggested by Krzysztof Kozlowski.
- Use max77686_map array indexes in init. Suggested by Krzysztof Kozlowski.
- Remove REG_RTC_UPDATE1 since is not used by neither max77686 nor max77802.
- Add a MAX77802 prefix to ALARM_ENABLE_VALUE. Suggested by Krzysztof Kozlowski.
- Rename .rtcae to .alarm_enable_reg and .rtcrm to .separate_i2c_addr.
  Suggested by Krzysztof Kozlowski.
- Don't use func and LINE in error messages. Suggested by Krzysztof Kozlowski.
- Remove REG_RTC_AE2 since is not used by neither max77686 nor max77802.
- Check if REG_RTC_AE1 has a valid address before accessing it.
- Add Krzysztof Kozlowski's Reviewed-by tag to patch #8.
- Add Krzysztof Kozlowski's Reviewed-by tag to patch #9.
- Add Krzysztof Kozlowski's Reviewed-by tag to patch #10.

Javier Martinez Canillas (10):
  rtc: max77686: Fix max77686_rtc_read_alarm() return value
  rtc: max77686: Use ARRAY_SIZE() instead of current array length
  rtc: max77686: Use usleep_range() instead of msleep()
  rtc: max77686: Use a driver data struct instead hard-coded values
  rtc: max77686: Add an indirection level to access RTC registers
  rtc: max77686: Add max77802 support
  rtc: max77686: Use dev_warn() instead of pr_warn()
  rtc: Remove Maxim 77802 driver
  ARM: exynos_defconfig: Remove MAX77802 RTC Kconfig symbol
  ARM: multi_v7_defconfig: Remove MAX77802 RTC Kconfig symbol

 arch/arm/configs/exynos_defconfig   |   1 -
 arch/arm/configs/multi_v7_defconfig |   1 -
 drivers/rtc/Kconfig                 |  10 -
 drivers/rtc/Makefile                |   1 -
 drivers/rtc/rtc-max77686.c          | 336 +++++++++++++++++++-----
 drivers/rtc/rtc-max77802.c          | 502 ------------------------------------
 6 files changed, 270 insertions(+), 581 deletions(-)
 delete mode 100644 drivers/rtc/rtc-max77802.c

-- 
2.5.0