kernel/drivers/rtc/rtc-mcp795.c, branch linux-5.1.y

rtc: mcp795: Switch to use %ptR

2018-12-10T21:39:52Z

Use %ptR instead of open coded variant to print content of struct rtc_time in human readable format. Signed-off-by: Andy Shevchenko Signed-off-by: Alexandre Belloni

rtc: remove VLA usage

2018-03-17T13:20:56Z

In preparation to enabling -Wvla, remove VLA and replace it with a fixed-length array instead. >From a security viewpoint, the use of Variable Length Arrays can be a vector for stack overflow attacks. Also, in general, as the code evolves it is easy to lose track of how big a VLA can get. Thus, we can end up having segfaults that are hard to debug. Also, fixed as part of the directive to remove all VLAs from the kernel: https://lkml.org/lkml/2018/3/7/621 Signed-off-by: Gustavo A. R. Silva Signed-off-by: Alexandre Belloni

rtc: stop validating rtc_time in .read_time

2018-03-02T09:09:58Z

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: mcp795: add alarm support.

2017-01-11T16:23:04Z

This patch adds alarm support. This allows to configure the chip to generate an interrupt when the alarm matches current time value. Alarm can be programmed up to one year in the future and is accurate to the second. Signed-off-by: Emil Bartczak Signed-off-by: Alexandre Belloni

rtc: mcp795: Add support for weekday.

2017-01-11T16:23:04Z

This patch adds support for saving/loading weekday value from the chip. Signed-off-by: Emil Bartczak Signed-off-by: Alexandre Belloni

rtc: mcp795: Fix whitespace and indentation.

2016-12-18T23:59:25Z

Fix whitespace and indentation errors and the following checkpatch warnings: - line 15: Block comments use a trailing */ on a separate line - line 256: Line over 80 characters No code change. Signed-off-by: Emil Bartczak Signed-off-by: Alexandre Belloni

rtc: mcp795: Prefer using the BIT() macro.

2016-12-18T23:59:24Z

This patch doesn't change the code but replaces all bitmask values with the BIT(x) macro. Signed-off-by: Emil Bartczak Signed-off-by: Alexandre Belloni

rtc: mcp795: fix month write resetting date to 1.

2016-12-18T23:59:23Z

According to Microchip errata some combinations of date and month values may result in the date being reset to 1, even if the date is also written with the month (for example 31-07 or 31-08). As a workaround avoid writing date and month values within the same Write command. Instead, terminate the Write command after loading the date and begin a new command to write the month. In addition, disable the oscillator before loading the new values. This is done by ensuring both the ST and EXTOSC bits are cleared and waiting for the OSCON bit to clear. Signed-off-by: Emil Bartczak Signed-off-by: Alexandre Belloni

rtc: mcp795: fix time range difference between linux and RTC chip.

2016-12-18T23:59:23Z

In linux rtc_time struct, tm_mon range is 0~11, while in RTC HW REG, month range is 1~12. This patch adjusts difference of them. Signed-off-by: Emil Bartczak Signed-off-by: Alexandre Belloni

rtc: mcp795: fix bitmask value for leap year (LP).

2016-12-18T23:59:22Z

According the datasheet the leap year is a fifth bit in month register. Signed-off-by: Emil Bartczak Signed-off-by: Alexandre Belloni