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@xxxxxxx> > --- > 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). -- Alexandre Belloni, Bootlin Embedded Linux and Kernel engineering https://bootlin.com
