diff options
| -rw-r--r-- | drivers/soc/sophgo/Kconfig | 13 | ||||
| -rw-r--r-- | drivers/soc/sophgo/Makefile | 1 | ||||
| -rw-r--r-- | drivers/soc/sophgo/cv1800-rtcsys.c | 63 |
3 files changed, 77 insertions, 0 deletions
diff --git a/drivers/soc/sophgo/Kconfig b/drivers/soc/sophgo/Kconfig index d97de4a41d5e..45f78b270c91 100644 --- a/drivers/soc/sophgo/Kconfig +++ b/drivers/soc/sophgo/Kconfig @@ -6,6 +6,19 @@ if ARCH_SOPHGO || COMPILE_TEST menu "Sophgo SoC drivers" +config SOPHGO_CV1800_RTCSYS + tristate "Sophgo CV1800 RTC MFD" + 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. + config SOPHGO_SG2044_TOPSYS tristate "Sophgo SG2044 TOP syscon driver" select MFD_CORE diff --git a/drivers/soc/sophgo/Makefile b/drivers/soc/sophgo/Makefile index 171a2922d75b..27f68df22c4d 100644 --- a/drivers/soc/sophgo/Makefile +++ b/drivers/soc/sophgo/Makefile @@ -1,3 +1,4 @@ # SPDX-License-Identifier: GPL-2.0 +obj-$(CONFIG_SOPHGO_CV1800_RTCSYS) += cv1800-rtcsys.o obj-$(CONFIG_SOPHGO_SG2044_TOPSYS) += sg2044-topsys.o diff --git a/drivers/soc/sophgo/cv1800-rtcsys.c b/drivers/soc/sophgo/cv1800-rtcsys.c new file mode 100644 index 000000000000..fdae2e2a61c5 --- /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@gmail.com> + * + */ + +#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 = "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@gmail.com>"); +MODULE_DESCRIPTION("Sophgo CV1800 series SoC RTC subsystem driver"); +MODULE_LICENSE("GPL"); |