kernel/drivers/rtc/rtc-mcp795.c, branch linux-4.16.y

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

rtc: mcp795: use bcd2bin/bin2bcd.

2016-12-18T23:59:22Z

Change rtc-mcp795.c to use the bcd2bin/bin2bcd functions. This change fixes the wrong conversion of month value from binary to BCD (missing right shift operation for 10 month). Signed-off-by: Emil Bartczak Signed-off-by: Alexandre Belloni

rtc: constify rtc_class_ops structures

2016-09-01T23:24:06Z

Check for rtc_class_ops structures that are only passed to devm_rtc_device_register, rtc_device_register, platform_device_register_data, all of which declare the corresponding parameter as const. Declare rtc_class_ops structures that have these properties as const. The semantic patch that makes this change is as follows: (http://coccinelle.lip6.fr/) // @r disable optional_qualifier@ identifier i; position p; @@ static struct rtc_class_ops i@p = { ... }; @ok@ identifier r.i; expression e1,e2,e3,e4; position p; @@ ( devm_rtc_device_register(e1,e2,&i@p,e3) | rtc_device_register(e1,e2,&i@p,e3) | platform_device_register_data(e1,e2,e3,&i@p,e4) ) @bad@ position p != {r.p,ok.p}; identifier r.i; @@ i@p @depends on !bad disable optional_qualifier@ identifier r.i; @@ static +const struct rtc_class_ops i = { ... }; // Signed-off-by: Julia Lawall Acked-by: Baruch Siach Acked-by: Hans Ulli Kroll Acked-by: Linus Walleij Acked-by: Thierry Reding Signed-off-by: Alexandre Belloni

rtc: mcp795: add devicetree support

2016-03-21T21:55:29Z

Add device tree support to the rtc-mcp795 driver. Signed-off-by: Emil Bartczak Acked-by: Rob Herring Signed-off-by: Alexandre Belloni