kernel/linux.git/drivers/rtc/rtc-r7301.c, branch v7.0.10

rtc: rtc7301: Support byte-addressed IO

2023-10-15T20:37:25+00:00

The old RTC7301 driver in OpenWrt used byte access, but the current mainline Linux driver uses 32bit word access. Make this configurable using device properties using the standard property "reg-io-width" in e.g. device tree. This is needed for the USRobotics USR8200 which has the chip connected using byte accesses. Debugging and testing by Howard Harte. Signed-off-by: Linus Walleij Reviewed-by: Akinobu Mita Link: https://lore.kernel.org/r/20231010-rtc-7301-regwidth-v3-2-ade586b62794@linaro.org Signed-off-by: Alexandre Belloni

rtc: r7301: Replace spin_lock_irqsave with spin_lock in hard IRQ

2021-02-05T23:50:47+00:00

It is redundant to do irqsave and irqrestore in hardIRQ context, where it has been in a irq-disabled context. Signed-off-by: Xiaofei Tan Signed-off-by: Alexandre Belloni Link: https://lore.kernel.org/r/1612355981-6764-4-git-send-email-tanxiaofei@huawei.com

rtc: Use devm_platform_ioremap_resource()

2019-10-06T19:04:51+00:00

Simplify probe by using a known wrapper function. This issue was detected by using the Coccinelle software. Signed-off-by: Markus Elfring Link: https://lore.kernel.org/r/4552ef52-f218-93b1-6dfa-668d137676f8@web.de Link: https://lore.kernel.org/r/5ecfcf43-d6b2-1a38-dee8-b8806f30bc83@web.de Link: https://lore.kernel.org/r/25448e11-c43f-9ae0-4c43-6f789accc026@web.de Reviewed-by: Akinobu Mita Link: https://lore.kernel.org/r/8c17a59c-82ff-aa6b-5653-a38d786d3e83@web.de Signed-off-by: Alexandre Belloni

treewide: Add SPDX license identifier for more missed files

2019-05-21T08:50:45+00:00

Add SPDX license identifiers to all files which: - Have no license information of any form - Have MODULE_LICENCE("GPL*") inside which was used in the initial scan/conversion to ignore the file These files fall under the project license, GPL v2 only. The resulting SPDX license identifier is: GPL-2.0-only Signed-off-by: Thomas Gleixner Signed-off-by: Greg Kroah-Hartman

headers: separate linux/mod_devicetable.h from linux/platform_device.h

2018-07-07T15:52:26+00:00

At over 4000 #includes, is the 9th most #included header file in the Linux kernel. It does not need , so drop that header and explicitly add to source files that need it. 4146 #include After this patch, there are 225 files that use , for a reduction of around 3900 times that does not have to be read & parsed. 225 #include This patch was build-tested on 20 different arch-es. It also makes these drivers SubmitChecklist#1 compliant. Signed-off-by: Randy Dunlap Reported-by: kbuild test robot # drivers/media/platform/vimc/ Reported-by: kbuild test robot # drivers/pinctrl/pinctrl-u300.c Signed-off-by: Greg Kroah-Hartman

rtc: r7301: stop validating rtc_time in .read_time

2018-03-02T09:12:18+00:00

The RTC core is always calling rtc_valid_tm after the read_time callback. It is not necessary to call it just before returning from the callback. Signed-off-by: Alexandre Belloni

rtc: r7301: Fix a possible sleep-in-atomic bug in rtc7301_set_time

2018-01-11T23:20:34+00:00

The driver may sleep under a spinlock. The function call path is: rtc7301_set_time (acquire the spinlock) usleep_range --> may sleep To fix it, usleep_range is replaced with udelay. This bug is found by my static analysis tool(DSAC) and checked by my code review. Signed-off-by: Jia-Ju Bai Signed-off-by: Alexandre Belloni

rtc: r7301: Fix a possible sleep-in-atomic bug in rtc7301_read_time

2018-01-11T23:20:28+00:00

The driver may sleep under a spinlock. The function call path is: rtc7301_read_time (acquire the spinlock) rtc7301_wait_while_busy usleep_range --> may sleep To fix it, usleep_range is replaced with udelay. This bug is found by my static analysis tool(DSAC) and checked by my code review. Signed-off-by: Jia-Ju Bai Signed-off-by: Alexandre Belloni

rtc: add support for EPSON TOYOCOM RTC-7301SF/DG

2016-12-18T23:59:21+00:00

This adds support for EPSON TOYOCOM RTC-7301SF/DG which has parallel interface compatible with SRAM. This driver supports basic clock, calendar and alarm functionality. Tested with Microblaze linux running on Artix7 FPGA board with my own custom IP for RTC-7301. Signed-off-by: Akinobu Mita Acked-by: Rob Herring Signed-off-by: Alexandre Belloni