Hello, This is a late reply (I forgot about this email) but have you seen drivers/rtc/rtc-rv8803.c ? Regards, On 24/01/2021 15:07:52+0100, wrote: > Hi All, > > I have a RX8900CE rtc, connected to the i2c bus of a raspberry pi. I've gotten a kernel module from the manufacturer of the chip [1][2], it's based on the kernel module for the RX-8025 [3]. I've compiled it with this makefile [4]: > > This all worked without any problem, in kernel 4.19.76 but in newer kernels the structure of the rtc drivers has changed. > > Has anybody already converted the RX8900CE driver to the new kernel interface? > After I update the kernel module, what steps do I have to take so it can be included in the mainline kernel? > > Cheers, > Cedric > > > [1] https://www5.epsondevice.com/en/information/support/linux_rtc/down_load.html > [2] https://www5.epsondevice.com/en/information/support/soft/rx8900_k3.8-v1.0.zip > [3] https://github.com/torvalds/linux/blob/master/drivers/rtc/rtc-rx8025.c > [4] > RX8900_DIR = $(shell pwd) > KSRC = /lib/modules/$(KVER)/build > KVER = $(shell uname -r) > MODDESTDIR = /lib/modules/$(KVER)/kernel/drivers/rtc > > CROSS_COMPILE = > > AS = $(CROSS_COMPILE)as > LD = $(CROSS_COMPILE)ld > CC = $(CROSS_COMPILE)gcc > CPP = $(CC) -E > AR = $(CROSS_COMPILE)ar > NM = $(CROSS_COMPILE)nm > STRIP = $(CROSS_COMPILE)strip > OBJCOPY = $(CROSS_COMPILE)objcopy > OBJDUMP = $(CROSS_COMPILE)objdump > DEPMOD = /sbin/depmod > INSTALL = /usr/bin/install > GREP = /bin/grep > > obj-m += rtc-rx8900.o > > all: > modules > > modules: > $(MAKE) -C $(KSRC) M=$(RX8900_DIR) CC=$(CC) modules > > install: modules > @$(GREP) rtc-rx8900.ko /lib/modules/$(shell uname -r)/modules.dep && rm -fr $(MODDESTDIR)/rtc-rx8900.ko || echo "No system rtc-rx8900.ko file found. Install the new rtc-rx8900.ko driver into the system" > $(INSTALL) -p -m 644 rtc-rx8900.ko $(MODDESTDIR) > @$(DEPMOD) -a > > uninstall: > @$(GREP) rtc-rx8900.ko /lib/modules/$(shell uname -r)/modules.dep && rm -fr $(MODDESTDIR)/rtc-rx8900.ko || echo "Remove the rtc-rx8900.ko driver from the system" > @$(DEPMOD) -a > > clean: > $(MAKE) -C $(KSRC) M=$(RX8900_DIR) CC=$(CC) clean > > > --- > > Take your mailboxes with you. Free, fast and secure Mail & Cloud: https://www.eclipso.eu - Time to change! > > -- Alexandre Belloni, co-owner and COO, Bootlin Embedded Linux and Kernel engineering https://bootlin.com
