| Message ID | 20200620224222.1312520-7-j.neuschaefer@gmx.net (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | None | expand |
On 21/06/2020 00:42:19+0200, Jonathan Neuschäfer wrote: > With this driver, mainline Linux can keep its time and date in sync with > the vendor kernel. > > Advanced functionality like alarm and automatic power-on is not yet > supported. > Please report the results of rtctest (from the kernel tree) and rtc-range (https://git.kernel.org/pub/scm/linux/kernel/git/abelloni/rtc-tools.git/tree/rtc-range.c) > Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> > --- > drivers/rtc/Kconfig | 4 ++ > drivers/rtc/Makefile | 1 + > drivers/rtc/rtc-ntxec.c | 115 ++++++++++++++++++++++++++++++++++++++++ > 3 files changed, 120 insertions(+) > create mode 100644 drivers/rtc/rtc-ntxec.c > > diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig > index b54d87d45c89b..2310d08933f9c 100644 > --- a/drivers/rtc/Kconfig > +++ b/drivers/rtc/Kconfig > @@ -1300,6 +1300,10 @@ config RTC_DRV_CROS_EC > This driver can also be built as a module. If so, the module > will be called rtc-cros-ec. > > +config RTC_DRV_NTXEC > + tristate "Netronix embedded controller RTC driver" > + depends on MFD_NTXEC > + This should get an help section. > comment "on-CPU RTC drivers" > > config RTC_DRV_ASM9260 > diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile > index 0721752c6ed4c..8653d04aefa99 100644 > --- a/drivers/rtc/Makefile > +++ b/drivers/rtc/Makefile > @@ -111,6 +111,7 @@ obj-$(CONFIG_RTC_DRV_MT7622) += rtc-mt7622.o > obj-$(CONFIG_RTC_DRV_MV) += rtc-mv.o > obj-$(CONFIG_RTC_DRV_MXC) += rtc-mxc.o > obj-$(CONFIG_RTC_DRV_MXC_V2) += rtc-mxc_v2.o > +obj-$(CONFIG_RTC_DRV_NTXEC) += rtc-ntxec.o > obj-$(CONFIG_RTC_DRV_OMAP) += rtc-omap.o > obj-$(CONFIG_RTC_DRV_OPAL) += rtc-opal.o > obj-$(CONFIG_RTC_DRV_PALMAS) += rtc-palmas.o > diff --git a/drivers/rtc/rtc-ntxec.c b/drivers/rtc/rtc-ntxec.c > new file mode 100644 > index 0000000000000..44d5a5eedb597 > --- /dev/null > +++ b/drivers/rtc/rtc-ntxec.c > @@ -0,0 +1,115 @@ > +// SPDX-License-Identifier: GPL-2.0-only > +// Copyright 2020 Jonathan Neuschäfer > + > +#include <linux/rtc.h> > +#include <linux/mfd/ntxec.h> > +#include <linux/platform_device.h> > +#include <linux/types.h> > +#include <linux/module.h> > +#include <linux/of_device.h> Please sort the includes. > + > +struct ntxec_rtc { > + struct device *dev; > + struct ntxec *ec; > +}; > + > +#define NTXEC_WRITE_YEAR 0x10 > +#define NTXEC_WRITE_MONTH 0x11 > +#define NTXEC_WRITE_DAY 0x12 > +#define NTXEC_WRITE_HOUR 0x13 > +#define NTXEC_WRITE_MINUTE 0x14 > +#define NTXEC_WRITE_SECOND 0x15 > + > +#define NTXEC_READ_YM 0x20 > +#define NTXEC_READ_DH 0x21 > +#define NTXEC_READ_MS 0x22 > + > + > +static int ntxec_read_time(struct device *dev, struct rtc_time *tm) > +{ > + struct ntxec_rtc *rtc = dev_get_drvdata(dev); > + int res; > + > + res = ntxec_read16(rtc->ec, NTXEC_READ_YM); > + if (res < 0) > + return res; > + > + tm->tm_year = (res >> 8) + 100; > + tm->tm_mon = (res & 0xff) - 1; > + > + res = ntxec_read16(rtc->ec, NTXEC_READ_DH); > + if (res < 0) > + return res; > + > + tm->tm_mday = res >> 8; > + tm->tm_hour = res & 0xff; > + > + res = ntxec_read16(rtc->ec, NTXEC_READ_MS); > + if (res < 0) > + return res; > + > + tm->tm_min = res >> 8; > + tm->tm_sec = res & 0xff; > + > + return 0; > +} > + > +static int ntxec_set_time(struct device *dev, struct rtc_time *tm) > +{ > + struct ntxec_rtc *rtc = dev_get_drvdata(dev); > + int res = 0; > + > + res |= ntxec_write8(rtc->ec, NTXEC_WRITE_YEAR, tm->tm_year - 100); > + res |= ntxec_write8(rtc->ec, NTXEC_WRITE_MONTH, tm->tm_mon + 1); > + res |= ntxec_write8(rtc->ec, NTXEC_WRITE_DAY, tm->tm_mday); > + res |= ntxec_write8(rtc->ec, NTXEC_WRITE_HOUR, tm->tm_hour); > + res |= ntxec_write8(rtc->ec, NTXEC_WRITE_MINUTE, tm->tm_min); > + res |= ntxec_write8(rtc->ec, NTXEC_WRITE_SECOND, tm->tm_sec); > + > + return (res < 0)? -EIO : 0; > +} > + > +static const struct rtc_class_ops ntxec_rtc_ops = { > + .read_time = ntxec_read_time, > + .set_time = ntxec_set_time, > +}; > + > +static int ntxec_rtc_probe(struct platform_device *pdev) > +{ > + struct rtc_device *rtcdev; > + struct ntxec_rtc *rtc; > + > + rtc = devm_kzalloc(&pdev->dev, sizeof(*rtc), GFP_KERNEL); > + if (!rtc) > + return -ENOMEM; > + > + rtc->dev = &pdev->dev; > + rtc->ec = dev_get_drvdata(pdev->dev.parent); > + platform_set_drvdata(pdev, rtc); > + > + rtcdev = devm_rtc_device_register(&pdev->dev, "ntxec-rtc", > + &ntxec_rtc_ops, THIS_MODULE); Please use devm_rtc_allocate_device and rtc_register_device. Also, set the supported range (->range_min and ->range_max).
Hi, On Sun, Jun 21, 2020 at 02:11:06AM +0200, Alexandre Belloni wrote: > On 21/06/2020 00:42:19+0200, Jonathan Neuschäfer wrote: > > With this driver, mainline Linux can keep its time and date in sync with > > the vendor kernel. > > > > Advanced functionality like alarm and automatic power-on is not yet > > supported. > > > > Please report the results of rtctest (from the kernel tree) [...] # ./rtctest [==========] Running 7 tests from 2 test cases. [ RUN ] rtc.date_read ../../tools/testing/selftests/rtc/rtctest.c:49:date_read:Current RTC date/time is 11/04/2006 23:11:23. [ OK ] rtc.date_read [ RUN ] rtc.uie_read [ 180.651355] random: crng init done uie_read: Test terminated by timeout [ FAIL ] rtc.uie_read [ RUN ] rtc.uie_select ../../tools/testing/selftests/rtc/rtctest.c:98:uie_select:Expected 0 (0) != rc (0) uie_select: Test terminated by assertion [ FAIL ] rtc.uie_select [ RUN ] rtc.alarm_alm_set ../../tools/testing/selftests/rtc/rtctest.c:129:alarm_alm_set:skip alarms are not supported. [ OK ] rtc.alarm_alm_set [ RUN ] rtc.alarm_wkalm_set ../../tools/testing/selftests/rtc/rtctest.c:185:alarm_wkalm_set:skip alarms are not supported. [ OK ] rtc.alarm_wkalm_set [ RUN ] rtc.alarm_alm_set_minute ../../tools/testing/selftests/rtc/rtctest.c:231:alarm_alm_set_minute:skip alarms are not supported. [ OK ] rtc.alarm_alm_set_minute [ RUN ] rtc.alarm_wkalm_set_minute ../../tools/testing/selftests/rtc/rtctest.c:287:alarm_wkalm_set_minute:skip alarms are not supported. [ OK ] rtc.alarm_wkalm_set_minute [==========] 5 / 7 tests passed. [ FAILED ] > [...] and rtc-range > (https://git.kernel.org/pub/scm/linux/kernel/git/abelloni/rtc-tools.git/tree/rtc-range.c) # ./rtc-range Testing 1970-01-01 00:00:00. KO Read back 2226-01-01 00:01:00. Testing 2000-02-28 23:59:59. KO Read back 2000-02-28 23:28:23. Testing 2020-02-28 23:59:59. KO Read back 2020-02-28 23:28:23. Testing 2038-01-19 03:14:07. KO Read back 2038-01-19 03:19:03. Testing 2069-12-31 23:59:59. KO Read back 2069-12-31 23:31:23. Testing 2079-12-31 23:59:59. KO Read back 2079-12-31 23:31:23. Testing 2099-12-31 23:59:59. KO Read back 2099-12-31 23:31:23. Testing 2255-12-31 23:59:59. KO Read back 2255-12-31 23:31:23. Testing 2100-02-28 23:59:59. KO Read back 2100-02-28 23:28:23. Testing 2106-02-07 06:28:15. KO Read back 2106-02-07 06:07:06. Testing 2262-04-11 23:47:16. KO Read back 2006-04-11 23:11:23. Something is very wrong here. I'll try to fix the failures in rtctest and the problems in rtc-range before version 2 of the patchset. (The 2255 date was my addition, because I suspect this to be the upper limit of the RTC's range.) [...] > > +config RTC_DRV_NTXEC > > + tristate "Netronix embedded controller RTC driver" > > + depends on MFD_NTXEC > > + > > This should get an help section. Ok, I'll add one. [...] > > +#include <linux/rtc.h> > > +#include <linux/mfd/ntxec.h> > > +#include <linux/platform_device.h> > > +#include <linux/types.h> > > +#include <linux/module.h> > > +#include <linux/of_device.h> > > Please sort the includes. Will do. [...] > > + rtcdev = devm_rtc_device_register(&pdev->dev, "ntxec-rtc", > > + &ntxec_rtc_ops, THIS_MODULE); > > Please use devm_rtc_allocate_device and rtc_register_device. Also, set > the supported range (->range_min and ->range_max). Ok, will do. Thanks for the review and the testing tips. Jonathan Neuschäfer
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig index b54d87d45c89b..2310d08933f9c 100644 --- a/drivers/rtc/Kconfig +++ b/drivers/rtc/Kconfig @@ -1300,6 +1300,10 @@ config RTC_DRV_CROS_EC This driver can also be built as a module. If so, the module will be called rtc-cros-ec. +config RTC_DRV_NTXEC + tristate "Netronix embedded controller RTC driver" + depends on MFD_NTXEC + comment "on-CPU RTC drivers" config RTC_DRV_ASM9260 diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile index 0721752c6ed4c..8653d04aefa99 100644 --- a/drivers/rtc/Makefile +++ b/drivers/rtc/Makefile @@ -111,6 +111,7 @@ obj-$(CONFIG_RTC_DRV_MT7622) += rtc-mt7622.o obj-$(CONFIG_RTC_DRV_MV) += rtc-mv.o obj-$(CONFIG_RTC_DRV_MXC) += rtc-mxc.o obj-$(CONFIG_RTC_DRV_MXC_V2) += rtc-mxc_v2.o +obj-$(CONFIG_RTC_DRV_NTXEC) += rtc-ntxec.o obj-$(CONFIG_RTC_DRV_OMAP) += rtc-omap.o obj-$(CONFIG_RTC_DRV_OPAL) += rtc-opal.o obj-$(CONFIG_RTC_DRV_PALMAS) += rtc-palmas.o diff --git a/drivers/rtc/rtc-ntxec.c b/drivers/rtc/rtc-ntxec.c new file mode 100644 index 0000000000000..44d5a5eedb597 --- /dev/null +++ b/drivers/rtc/rtc-ntxec.c @@ -0,0 +1,115 @@ +// SPDX-License-Identifier: GPL-2.0-only +// Copyright 2020 Jonathan Neuschäfer + +#include <linux/rtc.h> +#include <linux/mfd/ntxec.h> +#include <linux/platform_device.h> +#include <linux/types.h> +#include <linux/module.h> +#include <linux/of_device.h> + +struct ntxec_rtc { + struct device *dev; + struct ntxec *ec; +}; + +#define NTXEC_WRITE_YEAR 0x10 +#define NTXEC_WRITE_MONTH 0x11 +#define NTXEC_WRITE_DAY 0x12 +#define NTXEC_WRITE_HOUR 0x13 +#define NTXEC_WRITE_MINUTE 0x14 +#define NTXEC_WRITE_SECOND 0x15 + +#define NTXEC_READ_YM 0x20 +#define NTXEC_READ_DH 0x21 +#define NTXEC_READ_MS 0x22 + + +static int ntxec_read_time(struct device *dev, struct rtc_time *tm) +{ + struct ntxec_rtc *rtc = dev_get_drvdata(dev); + int res; + + res = ntxec_read16(rtc->ec, NTXEC_READ_YM); + if (res < 0) + return res; + + tm->tm_year = (res >> 8) + 100; + tm->tm_mon = (res & 0xff) - 1; + + res = ntxec_read16(rtc->ec, NTXEC_READ_DH); + if (res < 0) + return res; + + tm->tm_mday = res >> 8; + tm->tm_hour = res & 0xff; + + res = ntxec_read16(rtc->ec, NTXEC_READ_MS); + if (res < 0) + return res; + + tm->tm_min = res >> 8; + tm->tm_sec = res & 0xff; + + return 0; +} + +static int ntxec_set_time(struct device *dev, struct rtc_time *tm) +{ + struct ntxec_rtc *rtc = dev_get_drvdata(dev); + int res = 0; + + res |= ntxec_write8(rtc->ec, NTXEC_WRITE_YEAR, tm->tm_year - 100); + res |= ntxec_write8(rtc->ec, NTXEC_WRITE_MONTH, tm->tm_mon + 1); + res |= ntxec_write8(rtc->ec, NTXEC_WRITE_DAY, tm->tm_mday); + res |= ntxec_write8(rtc->ec, NTXEC_WRITE_HOUR, tm->tm_hour); + res |= ntxec_write8(rtc->ec, NTXEC_WRITE_MINUTE, tm->tm_min); + res |= ntxec_write8(rtc->ec, NTXEC_WRITE_SECOND, tm->tm_sec); + + return (res < 0)? -EIO : 0; +} + +static const struct rtc_class_ops ntxec_rtc_ops = { + .read_time = ntxec_read_time, + .set_time = ntxec_set_time, +}; + +static int ntxec_rtc_probe(struct platform_device *pdev) +{ + struct rtc_device *rtcdev; + struct ntxec_rtc *rtc; + + rtc = devm_kzalloc(&pdev->dev, sizeof(*rtc), GFP_KERNEL); + if (!rtc) + return -ENOMEM; + + rtc->dev = &pdev->dev; + rtc->ec = dev_get_drvdata(pdev->dev.parent); + platform_set_drvdata(pdev, rtc); + + rtcdev = devm_rtc_device_register(&pdev->dev, "ntxec-rtc", + &ntxec_rtc_ops, THIS_MODULE); + if (IS_ERR(rtcdev)) + return PTR_ERR(rtc); + + return 0; +} + +static const struct of_device_id ntxec_rtc_of_match[] = { + { .compatible = "netronix,ntxec-rtc" }, + { }, +}; +MODULE_DEVICE_TABLE(of, ntxec_rtc_of_match); + +static struct platform_driver ntxec_rtc_driver = { + .driver = { + .name = "ntxec-rtc", + .of_match_table = ntxec_rtc_of_match, + }, + .probe = ntxec_rtc_probe, +}; +module_platform_driver(ntxec_rtc_driver); + +MODULE_AUTHOR("Jonathan Neuschäfer <j.neuschaefer@gmx.net>"); +MODULE_DESCRIPTION("RTC driver for Netronix EC"); +MODULE_LICENSE("GPL");
With this driver, mainline Linux can keep its time and date in sync with the vendor kernel. Advanced functionality like alarm and automatic power-on is not yet supported. Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> --- drivers/rtc/Kconfig | 4 ++ drivers/rtc/Makefile | 1 + drivers/rtc/rtc-ntxec.c | 115 ++++++++++++++++++++++++++++++++++++++++ 3 files changed, 120 insertions(+) create mode 100644 drivers/rtc/rtc-ntxec.c -- 2.27.0