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linux/drivers/rtc/rtc-sc27xx.c

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rtc: sc27xx: Fix format of SPDX identifier For C files, use the C99 format (//). Cc: Orson Zhai <orsonzhai@gmail.com> Cc: Baolin Wang <baolin.wang7@gmail.com> Cc: Chunyan Zhang <zhang.lyra@gmail.com> Signed-off-by: Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20210707075804.337458-6-nobuhiro1.iwamatsu@toshiba.co.jp
2021-07-07 16:57:59 +09:00
rtc: sc27xx: Add Spreadtrum SC27xx PMIC RTC driver This patch adds the Spreadtrum RTC driver, which embedded in the Spreadtrum SC27xx series PMICs. Signed-off-by: Baolin Wang <baolin.wang@spreadtrum.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2017-11-09 11:34:17 +08:00
rtc: sprd: Add new RTC power down check method We should use the new method to check if RTC was powered down, which is more solid. Since we have introduced power control and power status registers, and we just check if the power status is the default value (0x96), if yes that means the RTC has been powered down. Meanwhile We can set the power control register to be one valid value to change the power status to indicate RTC device is valid now. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-05-31 17:18:08 +08:00
rtc: sc27xx: Add Spreadtrum SC27xx PMIC RTC driver This patch adds the Spreadtrum RTC driver, which embedded in the Spreadtrum SC27xx series PMICs. Signed-off-by: Baolin Wang <baolin.wang@spreadtrum.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2017-11-09 11:34:17 +08:00
rtc: sprd: Add new RTC power down check method We should use the new method to check if RTC was powered down, which is more solid. Since we have introduced power control and power status registers, and we just check if the power status is the default value (0x96), if yes that means the RTC has been powered down. Meanwhile We can set the power control register to be one valid value to change the power status to indicate RTC device is valid now. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-05-31 17:18:08 +08:00
rtc: sc27xx: Add Spreadtrum SC27xx PMIC RTC driver This patch adds the Spreadtrum RTC driver, which embedded in the Spreadtrum SC27xx series PMICs. Signed-off-by: Baolin Wang <baolin.wang@spreadtrum.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2017-11-09 11:34:17 +08:00
rtc: sc27xx: Remove clearing SPRD_RTC_POWEROFF_ALM_FLAG flag The SPRD_RTC_POWEROFF_ALM_FLAG flag is used to indicate if a poweroff alarm is set, which can power on the system when system in power-off status. And the bootloader will validate this flag to check if the booting mode is alarm booting mode, thus we should not clear this flag in kernel, instead bootloader will clear this flag after checking the booting mode. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Link: https://lore.kernel.org/r/1f75310242de75b14d8973538bf96efffb395daf.1567666894.git.baolin.wang@linaro.org Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2019-09-05 15:03:30 +08:00
rtc: sc27xx: Add Spreadtrum SC27xx PMIC RTC driver This patch adds the Spreadtrum RTC driver, which embedded in the Spreadtrum SC27xx series PMICs. Signed-off-by: Baolin Wang <baolin.wang@spreadtrum.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2017-11-09 11:34:17 +08:00
rtc: sc27xx: Clear SPG value update interrupt status We should clear the SPG value update interrupt status once the SPG value is updated successfully, in case incorrect status validation for next time. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-10-18 16:52:27 +08:00
rtc: sc27xx: Add Spreadtrum SC27xx PMIC RTC driver This patch adds the Spreadtrum RTC driver, which embedded in the Spreadtrum SC27xx series PMICs. Signed-off-by: Baolin Wang <baolin.wang@spreadtrum.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2017-11-09 11:34:17 +08:00
rtc: sc27xx: stop validating rtc_time in .read_time rtc_time64_to_tm never generates an invalid tm. It is not necessary to validate it. Also, the RTC core is always calling rtc_valid_tm after the read_time callback. Reviewed-by: Baolin Wang <baolin.wang@linaro.org> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-02-19 16:24:19 +01:00
rtc: sc27xx: Add Spreadtrum SC27xx PMIC RTC driver This patch adds the Spreadtrum RTC driver, which embedded in the Spreadtrum SC27xx series PMICs. Signed-off-by: Baolin Wang <baolin.wang@spreadtrum.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2017-11-09 11:34:17 +08:00
rtc: sprd: Add new RTC power down check method We should use the new method to check if RTC was powered down, which is more solid. Since we have introduced power control and power status registers, and we just check if the power status is the default value (0x96), if yes that means the RTC has been powered down. Meanwhile We can set the power control register to be one valid value to change the power status to indicate RTC device is valid now. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-05-31 17:18:08 +08:00
rtc: sc27xx: Add Spreadtrum SC27xx PMIC RTC driver This patch adds the Spreadtrum RTC driver, which embedded in the Spreadtrum SC27xx series PMICs. Signed-off-by: Baolin Wang <baolin.wang@spreadtrum.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2017-11-09 11:34:17 +08:00
rtc: sprd: Add new RTC power down check method We should use the new method to check if RTC was powered down, which is more solid. Since we have introduced power control and power status registers, and we just check if the power status is the default value (0x96), if yes that means the RTC has been powered down. Meanwhile We can set the power control register to be one valid value to change the power status to indicate RTC device is valid now. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-05-31 17:18:08 +08:00
rtc: sc27xx: Add Spreadtrum SC27xx PMIC RTC driver This patch adds the Spreadtrum RTC driver, which embedded in the Spreadtrum SC27xx series PMICs. Signed-off-by: Baolin Wang <baolin.wang@spreadtrum.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2017-11-09 11:34:17 +08:00
rtc: sc27xx: Always read normal alarm The RTC core only reads the alarm from the hardware at boot time, to know whether an alarm was already set before booting. It keeps track of all the alarms after that so there is no need to ever read the auxiliary alarm. Commit 3822d1bb0df1 ("rtc: sc27xx: Always read normal alarm when registering RTC device") already effectively removed the capability to read the auxiliary alarm as .read_alarm is always called with rtc->registered set to false. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Reviewed-by: Chunyan Zhang <zhang.lyra@gmail.com> Link: https://lore.kernel.org/r/20201117212201.1288608-1-alexandre.belloni@bootlin.com
2020-11-17 22:22:01 +01:00
rtc: sc27xx: Add Spreadtrum SC27xx PMIC RTC driver This patch adds the Spreadtrum RTC driver, which embedded in the Spreadtrum SC27xx series PMICs. Signed-off-by: Baolin Wang <baolin.wang@spreadtrum.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2017-11-09 11:34:17 +08:00
rtc: sprd: Add new RTC power down check method We should use the new method to check if RTC was powered down, which is more solid. Since we have introduced power control and power status registers, and we just check if the power status is the default value (0x96), if yes that means the RTC has been powered down. Meanwhile We can set the power control register to be one valid value to change the power status to indicate RTC device is valid now. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-05-31 17:18:08 +08:00
rtc: sc27xx: Add Spreadtrum SC27xx PMIC RTC driver This patch adds the Spreadtrum RTC driver, which embedded in the Spreadtrum SC27xx series PMICs. Signed-off-by: Baolin Wang <baolin.wang@spreadtrum.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2017-11-09 11:34:17 +08:00
rtc: sprd: Add new RTC power down check method We should use the new method to check if RTC was powered down, which is more solid. Since we have introduced power control and power status registers, and we just check if the power status is the default value (0x96), if yes that means the RTC has been powered down. Meanwhile We can set the power control register to be one valid value to change the power status to indicate RTC device is valid now. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-05-31 17:18:08 +08:00
rtc: sc27xx: Add Spreadtrum SC27xx PMIC RTC driver This patch adds the Spreadtrum RTC driver, which embedded in the Spreadtrum SC27xx series PMICs. Signed-off-by: Baolin Wang <baolin.wang@spreadtrum.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2017-11-09 11:34:17 +08:00
rtc: sc27xx: Remove unnecessary conversion to bool Here we could use the '!=' expression to fix the following coccicheck warning: ./drivers/rtc/rtc-sc27xx.c:566:50-55: WARNING: conversion to bool not needed here Reported-by: Tosk Robot <tencent_os_robot@tencent.com> Signed-off-by: Kaixu Xia <kaixuxia@tencent.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/1604647854-876-1-git-send-email-kaixuxia@tencent.com
2020-11-06 15:30:54 +08:00
rtc: sc27xx: Add Spreadtrum SC27xx PMIC RTC driver This patch adds the Spreadtrum RTC driver, which embedded in the Spreadtrum SC27xx series PMICs. Signed-off-by: Baolin Wang <baolin.wang@spreadtrum.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2017-11-09 11:34:17 +08:00
rtc: sc27xx: Add check to see if need to enable the alarm interrupt The RTC interrupt enable register is not put in always-power-on region supplied by VDDRTC, so we should check if we need enable the alarm interrupt when system booting. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-10-18 16:52:29 +08:00
rtc: sc27xx: Add Spreadtrum SC27xx PMIC RTC driver This patch adds the Spreadtrum RTC driver, which embedded in the Spreadtrum SC27xx series PMICs. Signed-off-by: Baolin Wang <baolin.wang@spreadtrum.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2017-11-09 11:34:17 +08:00
rtc: Remove dev_err() usage after platform_get_irq() We don't need dev_err() messages when platform_get_irq() fails now that platform_get_irq() prints an error message itself when something goes wrong. Let's remove these prints with a simple semantic patch. // <smpl> @@ expression ret; struct platform_device *E; @@ ret = ( platform_get_irq(E, ...) | platform_get_irq_byname(E, ...) ); if ( \( ret < 0 \| ret <= 0 \) ) { ( -if (ret != -EPROBE_DEFER) -{ ... -dev_err(...); -... } | ... -dev_err(...); ) ... } // </smpl> While we're here, remove braces on if statements that only have one statement (manually). Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: Alexandre Belloni <alexandre.belloni@bootlin.com> Cc: linux-rtc@vger.kernel.org Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Stephen Boyd <swboyd@chromium.org> Link: https://lore.kernel.org/r/20190730181557.90391-40-swboyd@chromium.org Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2019-07-30 11:15:39 -07:00
rtc: sc27xx: Add Spreadtrum SC27xx PMIC RTC driver This patch adds the Spreadtrum RTC driver, which embedded in the Spreadtrum SC27xx series PMICs. Signed-off-by: Baolin Wang <baolin.wang@spreadtrum.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2017-11-09 11:34:17 +08:00
rtc: sprd: Change to use devm_rtc_allocate_device() This is a preparation patch, changing to use devm_rtc_allocate_device() that can allow driver to set 'range_max' and 'range_min' for the RTC device. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-04-26 10:58:44 +08:00
rtc: sc27xx: Add Spreadtrum SC27xx PMIC RTC driver This patch adds the Spreadtrum RTC driver, which embedded in the Spreadtrum SC27xx series PMICs. Signed-off-by: Baolin Wang <baolin.wang@spreadtrum.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2017-11-09 11:34:17 +08:00
rtc: sc27xx: Add check to see if need to enable the alarm interrupt The RTC interrupt enable register is not put in always-power-on region supplied by VDDRTC, so we should check if we need enable the alarm interrupt when system booting. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-10-18 16:52:29 +08:00
rtc: sc27xx: Add Spreadtrum SC27xx PMIC RTC driver This patch adds the Spreadtrum RTC driver, which embedded in the Spreadtrum SC27xx series PMICs. Signed-off-by: Baolin Wang <baolin.wang@spreadtrum.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2017-11-09 11:34:17 +08:00
rtc: use boolean values with device_init_wakeup() device_init_wakeup() second argument is a bool type. Use proper boolean values when calling it to match the type and to produce unambiguous code which is easier to understand. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Reviewed-by: Charles Keepax <ckeepax@opensource.cirrus.com> Reviewed-by: Andre Przywara <andre.przywara@arm.com> Link: https://lore.kernel.org/r/20241217071331.3607-2-wsa+renesas@sang-engineering.com Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2024-12-17 08:13:26 +01:00
rtc: sc27xx: Set wakeup capability before registering rtc device Set wakeup capability before registering rtc device, in case the alarmtimer can find one available rtc device. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-10-18 16:52:26 +08:00
rtc: sprd: Change to use devm_rtc_allocate_device() This is a preparation patch, changing to use devm_rtc_allocate_device() that can allow driver to set 'range_max' and 'range_min' for the RTC device. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-04-26 10:58:44 +08:00
rtc: sprd: Add RTC hardware range The SC27xx RTC can support dates from 1970-01-01 00:00:00 to 2149-06-06 23:59:59. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-04-26 10:58:45 +08:00
rtc: rework rtc_register_device() resource management rtc_register_device() is a managed interface but it doesn't use devres by itself - instead it marks an rtc_device as "registered" and the devres callback for devm_rtc_allocate_device() takes care of resource release. This doesn't correspond with the design behind devres where managed structures should not be aware of being managed. The correct solution here is to register a separate devres callback for unregistering the device. While at it: rename rtc_register_device() to devm_rtc_register_device() and add it to the list of managed interfaces in devres.rst. This way we can avoid any potential confusion of driver developers who may expect there to exist a corresponding unregister function. Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20201109163409.24301-8-brgl@bgdev.pl
2020-11-09 17:34:08 +01:00
rtc: sprd: Change to use devm_rtc_allocate_device() This is a preparation patch, changing to use devm_rtc_allocate_device() that can allow driver to set 'range_max' and 'range_min' for the RTC device. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-04-26 10:58:44 +08:00
rtc: use boolean values with device_init_wakeup() device_init_wakeup() second argument is a bool type. Use proper boolean values when calling it to match the type and to produce unambiguous code which is easier to understand. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Reviewed-by: Charles Keepax <ckeepax@opensource.cirrus.com> Reviewed-by: Andre Przywara <andre.przywara@arm.com> Link: https://lore.kernel.org/r/20241217071331.3607-2-wsa+renesas@sang-engineering.com Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2024-12-17 08:13:26 +01:00
rtc: sprd: Change to use devm_rtc_allocate_device() This is a preparation patch, changing to use devm_rtc_allocate_device() that can allow driver to set 'range_max' and 'range_min' for the RTC device. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-04-26 10:58:44 +08:00
rtc: sc27xx: Add Spreadtrum SC27xx PMIC RTC driver This patch adds the Spreadtrum RTC driver, which embedded in the Spreadtrum SC27xx series PMICs. Signed-off-by: Baolin Wang <baolin.wang@spreadtrum.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2017-11-09 11:34:17 +08:00