On Sun, Mar 09, 2025 at 09:26:24PM +0100, Alexander Sverdlin wrote: > Add driver for Sophgo CV1800 series SoC RTC subsystem. The RTC module > comprises a 32kHz oscillator, Power-on-Reset (PoR) sub-module, HW state > machine to control chip power-on, power-off and reset. Furthermore, the > 8051 subsystem is located within RTCSYS including associated SRAM block. > > This patch only populates RTC sub-device. > > Signed-off-by: Alexander Sverdlin <alexander.sverdlin@xxxxxxxxx> > --- > Changelog: > v13: > - Moved the driver from MFD into SOC subsystem > - Dropped unused "cv1800_rtcsys_rtc_subdev" > v12: > - new patch > > MAINTAINERS | 1 + > drivers/soc/Kconfig | 1 + > drivers/soc/Makefile | 1 + > drivers/soc/sophgo/Kconfig | 24 ++++++++++++ > drivers/soc/sophgo/Makefile | 3 ++ > drivers/soc/sophgo/cv1800-rtcsys.c | 63 ++++++++++++++++++++++++++++++ > 6 files changed, 93 insertions(+) > create mode 100644 drivers/soc/sophgo/Kconfig > create mode 100644 drivers/soc/sophgo/Makefile > create mode 100644 drivers/soc/sophgo/cv1800-rtcsys.c > > diff --git a/MAINTAINERS b/MAINTAINERS > index 3eee238c2ea2..ac15e448fffb 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -22354,6 +22354,7 @@ L: sophgo@xxxxxxxxxxxxxxx > W: https://github.com/sophgo/linux/wiki > T: git https://github.com/sophgo/linux.git > S: Maintained > +F: drivers/soc/sophgo/cv1800-rtcsys.c Please change to the drivers/soc/sophgo/. We should maintain all files under this. > N: sophgo > K: sophgo > > diff --git a/drivers/soc/Kconfig b/drivers/soc/Kconfig > index 6a8daeb8c4b9..11e2383c0654 100644 > --- a/drivers/soc/Kconfig > +++ b/drivers/soc/Kconfig > @@ -23,6 +23,7 @@ source "drivers/soc/qcom/Kconfig" > source "drivers/soc/renesas/Kconfig" > source "drivers/soc/rockchip/Kconfig" > source "drivers/soc/samsung/Kconfig" > +source "drivers/soc/sophgo/Kconfig" > source "drivers/soc/sunxi/Kconfig" > source "drivers/soc/tegra/Kconfig" > source "drivers/soc/ti/Kconfig" > diff --git a/drivers/soc/Makefile b/drivers/soc/Makefile > index 2037a8695cb2..0381a0abdec8 100644 > --- a/drivers/soc/Makefile > +++ b/drivers/soc/Makefile > @@ -29,6 +29,7 @@ obj-y += qcom/ > obj-y += renesas/ > obj-y += rockchip/ > obj-$(CONFIG_SOC_SAMSUNG) += samsung/ > +obj-y += sophgo/ > obj-y += sunxi/ > obj-$(CONFIG_ARCH_TEGRA) += tegra/ > obj-y += ti/ > diff --git a/drivers/soc/sophgo/Kconfig b/drivers/soc/sophgo/Kconfig > new file mode 100644 > index 000000000000..e50666e423a9 > --- /dev/null > +++ b/drivers/soc/sophgo/Kconfig > @@ -0,0 +1,24 @@ > +# SPDX-License-Identifier: GPL-2.0-only > +# > +# Sophgo/Cvitek SoC drivers > +# > + > +if ARCH_SOPHGO || COMPILE_TEST > +menu "Sophgo/Cvitek SoC drivers" No Cvitek, only left Sophgo here. > + > +config SOPHGO_CV1800_RTCSYS > + tristate "Sophgo CV1800 RTC MFD" > + default y if COMPILE_TEST I do not think it is necessary. > + select MFD_CORE > + help > + If you say yes here you get support the RTC MFD driver for Sophgo > + CV1800 series SoC. The RTC module comprises a 32kHz oscillator, > + Power-on-Reset (PoR) sub-module, HW state machine to control chip > + power-on, power-off and reset. Furthermore, the 8051 subsystem is > + located within RTCSYS including associated SRAM block. > + > + This driver can also be built as a module. If so, the module will be > + called cv1800-rtcsys. > + > +endmenu > +endif > diff --git a/drivers/soc/sophgo/Makefile b/drivers/soc/sophgo/Makefile > new file mode 100644 > index 000000000000..8f22b4e79311 > --- /dev/null > +++ b/drivers/soc/sophgo/Makefile > @@ -0,0 +1,3 @@ > +# SPDX-License-Identifier: GPL-2.0 > + > +obj-$(CONFIG_SOPHGO_CV1800_RTCSYS) += cv1800-rtcsys.o > diff --git a/drivers/soc/sophgo/cv1800-rtcsys.c b/drivers/soc/sophgo/cv1800-rtcsys.c > new file mode 100644 > index 000000000000..cb271f02afcc > --- /dev/null > +++ b/drivers/soc/sophgo/cv1800-rtcsys.c > @@ -0,0 +1,63 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/* > + * Driver for Sophgo CV1800 series SoC RTC subsystem > + * > + * The RTC module comprises a 32kHz oscillator, Power-on-Reset (PoR) sub-module, > + * HW state machine to control chip power-on, power-off and reset. Furthermore, > + * the 8051 subsystem is located within RTCSYS including associated SRAM block. > + * > + * Copyright (C) 2025 Alexander Sverdlin <alexander.sverdlin@xxxxxxxxx> > + * > + */ > + > +#include <linux/mfd/core.h> > +#include <linux/module.h> > +#include <linux/of.h> > +#include <linux/property.h> > + > +static struct resource cv1800_rtcsys_irq_resources[] = { > + DEFINE_RES_IRQ_NAMED(0, "alarm"), > +}; > + > +static const struct mfd_cell cv1800_rtcsys_subdev[] = { > + { > + .name = "cv1800-rtc", Make this a specifc one, like "sophgo,cv1800b-rtc" > + .num_resources = 1, > + .resources = &cv1800_rtcsys_irq_resources[0], > + }, > +}; > + > +static int cv1800_rtcsys_probe(struct platform_device *pdev) > +{ > + int irq; > + > + irq = platform_get_irq_byname(pdev, "alarm"); > + if (irq < 0) > + return irq; > + cv1800_rtcsys_irq_resources[0].start = irq; > + cv1800_rtcsys_irq_resources[0].end = irq; > + > + return devm_mfd_add_devices(&pdev->dev, PLATFORM_DEVID_AUTO, > + cv1800_rtcsys_subdev, > + ARRAY_SIZE(cv1800_rtcsys_subdev), > + NULL, 0, NULL); > +} > + > +static const struct of_device_id cv1800_rtcsys_of_match[] = { > + { .compatible = "sophgo,cv1800b-rtc" }, > + { /* sentinel */ } > +}; > +MODULE_DEVICE_TABLE(of, cv1800_rtcsys_of_match); > + > +static struct platform_driver cv1800_rtcsys_mfd = { > + .probe = cv1800_rtcsys_probe, > + .driver = { > + .name = "cv1800_rtcsys", > + .of_match_table = cv1800_rtcsys_of_match, > + }, > +}; > +module_platform_driver(cv1800_rtcsys_mfd); > + > +MODULE_AUTHOR("Alexander Sverdlin <alexander.sverdlin@xxxxxxxxx>"); > +MODULE_DESCRIPTION("Sophgo CV1800 series SoC RTC subsystem driver"); > +MODULE_LICENSE("GPL"); > -- > 2.48.1 >
